首页 > 最新文献

Canadian Journal of Soil Science最新文献

英文 中文
Microwave-assisted citrate extraction (MaCE) as an alternative to autoclave citrate extraction (ACE) of a soil protein fraction 微波辅助柠檬酸盐提取(MaCE)作为高压釜柠檬酸盐萃取(ACE)土壤蛋白质组分的替代方案
IF 1.7 4区 农林科学 Q4 SOIL SCIENCE Pub Date : 2023-07-21 DOI: 10.1139/cjss-2023-0016
Qianyi Wu, K. Congreves, R. Farrell
Soil protein is an important indicator of soil health and for soil health assessments is usually determined using autoclaved citrate extraction (ACE) followed by protein quantification using the Bradford or bicinchoninic acid (BCA) assay. Here we investigated an alternative extraction process using microwave-assisted citrate extraction (MaCE). We show that protein yield increases as the extraction time increases, but that yields comparable to those obtained using the standard ACE method can be obtained with an extraction time as short as 15 min. To the best of our knowledge, this is the first report of microwave-assisted extraction being used to determine this soil protein pool.
土壤蛋白质是土壤健康的重要指标,对于土壤健康评估,通常使用高压灭菌柠檬酸盐提取(ACE)进行测定,然后使用Bradford或二辛可宁酸(BCA)测定进行蛋白质定量。在这里,我们研究了一种使用微波辅助柠檬酸盐提取(MaCE)的替代提取工艺。我们表明,蛋白质产量随着提取时间的增加而增加,但在提取时间短至15分钟的情况下,可以获得与使用标准ACE方法获得的产量相当的产量。据我们所知,这是第一份使用微波辅助提取来确定土壤蛋白质库的报告。
{"title":"Microwave-assisted citrate extraction (MaCE) as an alternative to autoclave citrate extraction (ACE) of a soil protein fraction","authors":"Qianyi Wu, K. Congreves, R. Farrell","doi":"10.1139/cjss-2023-0016","DOIUrl":"https://doi.org/10.1139/cjss-2023-0016","url":null,"abstract":"Soil protein is an important indicator of soil health and for soil health assessments is usually determined using autoclaved citrate extraction (ACE) followed by protein quantification using the Bradford or bicinchoninic acid (BCA) assay. Here we investigated an alternative extraction process using microwave-assisted citrate extraction (MaCE). We show that protein yield increases as the extraction time increases, but that yields comparable to those obtained using the standard ACE method can be obtained with an extraction time as short as 15 min. To the best of our knowledge, this is the first report of microwave-assisted extraction being used to determine this soil protein pool.","PeriodicalId":9384,"journal":{"name":"Canadian Journal of Soil Science","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46773564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Growth and survival of native upland and wetland species in shallow capped thickened tailings: A meso-scale greenhouse study 浅盖加厚尾矿中原生高地和湿地物种的生长和存活:一项中尺度温室研究
IF 1.7 4区 农林科学 Q4 SOIL SCIENCE Pub Date : 2023-07-13 DOI: 10.1139/cjss-2022-0113
Dani Degenhardt, A. Van Dongen, Stefan G. Schreiber, A. Bekele
This three-year meso-scale greenhouse study used 55-gallon columns to evaluate the survival and growth of boreal upland and wetland communities on thickened tailings (TT) with 0 cm, 10 cm, and 30 cm peat-mineral mix (PMM) reclamation cap. While survival was high in all treatments, the PMM cap treatments showed significant improvement in overall plant growth, cover, and above-ground biomass compared to the uncapped treatment, with the 30 cm PMM cap outperforming the 10 cm PMM. The plant growth response was similar between the two communities and the top performing species, in terms of survival and growth, in capped TT were Cornus sericea,Populus tremuloides, Salix bebbiana, and Scirpus microcarpus.
这项为期3年的中尺度温室研究使用55加仑柱来评估北方旱地和湿地群落在浓密尾砂(0 cm、10 cm和30 cm)上的生存和生长情况。虽然所有处理的存活率都很高,但与未封顶处理相比,PMM封顶处理在整体植物生长、覆盖度和地上生物量方面都有显著改善,其中30 cm PMM封顶的表现优于10 cm PMM。两个群落间的植物生长响应相似,在封顶条件下生长和生存表现最好的树种为山茱萸(Cornus sericea)、白杨树(Populus tremuloides)、黄柳(Salix bebbiana)和小菖蒲(Scirpus microcarpus)。
{"title":"Growth and survival of native upland and wetland species in shallow capped thickened tailings: A meso-scale greenhouse study","authors":"Dani Degenhardt, A. Van Dongen, Stefan G. Schreiber, A. Bekele","doi":"10.1139/cjss-2022-0113","DOIUrl":"https://doi.org/10.1139/cjss-2022-0113","url":null,"abstract":"This three-year meso-scale greenhouse study used 55-gallon columns to evaluate the survival and growth of boreal upland and wetland communities on thickened tailings (TT) with 0 cm, 10 cm, and 30 cm peat-mineral mix (PMM) reclamation cap. While survival was high in all treatments, the PMM cap treatments showed significant improvement in overall plant growth, cover, and above-ground biomass compared to the uncapped treatment, with the 30 cm PMM cap outperforming the 10 cm PMM. The plant growth response was similar between the two communities and the top performing species, in terms of survival and growth, in capped TT were Cornus sericea,Populus tremuloides, Salix bebbiana, and Scirpus microcarpus.","PeriodicalId":9384,"journal":{"name":"Canadian Journal of Soil Science","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41594523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Influence of Pulse-Wheat Crop Rotations on Aggregate Size Distribution Dynamics in the Brown Soil Zone in Southern Alberta, Canada 小麦轮作对加拿大艾伯塔省南部棕壤区团聚体粒径分布动态的影响
IF 1.7 4区 农林科学 Q4 SOIL SCIENCE Pub Date : 2023-06-30 DOI: 10.1139/cjss-2023-0005
P. Gallage, M. Bandara, J. Knight
Diversification of conventional cereal-based cropping systems with pulse crops may aid producers to grow crops in an appropriate sequence and frequency with environmental, social and economic benefits. This study examined the effects of including three pulse crops with different rooting depths (shallow- and deep-rooted) in wheat-based crop rotations on soil aggregate size distribution under semi-arid and rain-fed conditions. A 4-year cycle rotational study was established in Brooks, AB using five selected treatments: continuous wheat, wheat alternately grown with lentil, field pea, or chickpea, or lentil and chickpea alternately grown with wheat. Soils were collected from 0-5 cm-depth and dry sieved to produce eight aggregate size classes, <0.053 mm, 0.053-0.125 mm, 0.125-0.149 mm, 0.149-0.05 mm, 0.05-1.0 mm, 1.0-2.0 mm, 2.0-6.35 mm and >6.35 mm. The continuous wheat treatment improved the macro-aggregates (>6.35 mm) development, whereas the rotations with pulse-wheat crops increased the micro- and meso-aggregates (0.50-1.0 mm and 0.15-0.5 mm) development. Soils sampled at 0-15 cm-depth were used for soil organic matter and microbial analysis. The pulse-wheat rotations collectively had more light fraction organic matter (LFOM) than the continuous wheat, and chickpea alternated with wheat had the highest amount of LFOM in both years. All treatments had similar soil microbial biomass and microbial community composition. Our study underscores the contribution of pulse crops in cereal-based cropping systems in the formation of small aggregates.
采用脉冲作物的传统谷物种植系统的多样化可能有助于生产者以适当的顺序和频率种植作物,并带来环境、社会和经济效益。本研究考察了在半干旱和雨水灌溉条件下,在小麦轮作中包括三种不同生根深度(浅根和深根)的脉冲作物对土壤团聚体粒径分布的影响。在Brooks,AB建立了一项4年周期轮换研究,使用了五种选择的处理:连续小麦、与扁豆交替生长的小麦、田豌豆或鹰嘴豆,或与小麦交替生长的扁豆和鹰嘴豆。从0-5厘米的深度收集土壤,并进行干筛,以产生8种大小为6.35毫米的团聚体。连续小麦处理改善了宏观团聚体(>6.35毫米)的发育,而脉冲小麦作物的轮作增加了微观和中等团聚体(0.50-1.0毫米和0.15-0.5毫米)的发展。在0-15cm深度取样的土壤用于土壤有机质和微生物分析。脉冲小麦轮作总体上比连续小麦具有更多的轻组分有机质(LFOM),鹰嘴豆和小麦轮作具有最高的LFOM含量。所有处理的土壤微生物生物量和微生物群落组成相似。我们的研究强调了谷物种植系统中脉冲作物对小团聚体形成的贡献。
{"title":"Influence of Pulse-Wheat Crop Rotations on Aggregate Size Distribution Dynamics in the Brown Soil Zone in Southern Alberta, Canada","authors":"P. Gallage, M. Bandara, J. Knight","doi":"10.1139/cjss-2023-0005","DOIUrl":"https://doi.org/10.1139/cjss-2023-0005","url":null,"abstract":"Diversification of conventional cereal-based cropping systems with pulse crops may aid producers to grow crops in an appropriate sequence and frequency with environmental, social and economic benefits. This study examined the effects of including three pulse crops with different rooting depths (shallow- and deep-rooted) in wheat-based crop rotations on soil aggregate size distribution under semi-arid and rain-fed conditions. A 4-year cycle rotational study was established in Brooks, AB using five selected treatments: continuous wheat, wheat alternately grown with lentil, field pea, or chickpea, or lentil and chickpea alternately grown with wheat. Soils were collected from 0-5 cm-depth and dry sieved to produce eight aggregate size classes, <0.053 mm, 0.053-0.125 mm, 0.125-0.149 mm, 0.149-0.05 mm, 0.05-1.0 mm, 1.0-2.0 mm, 2.0-6.35 mm and >6.35 mm. The continuous wheat treatment improved the macro-aggregates (>6.35 mm) development, whereas the rotations with pulse-wheat crops increased the micro- and meso-aggregates (0.50-1.0 mm and 0.15-0.5 mm) development. Soils sampled at 0-15 cm-depth were used for soil organic matter and microbial analysis. The pulse-wheat rotations collectively had more light fraction organic matter (LFOM) than the continuous wheat, and chickpea alternated with wheat had the highest amount of LFOM in both years. All treatments had similar soil microbial biomass and microbial community composition. Our study underscores the contribution of pulse crops in cereal-based cropping systems in the formation of small aggregates.","PeriodicalId":9384,"journal":{"name":"Canadian Journal of Soil Science","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48773156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Growth and survival of native wetland species in shallow capped centrifuged tailings and co-mixed tailings: A meso-scale greenhouse study 浅盖离心尾矿和共混尾矿中原生湿地物种的生长和生存:中尺度温室研究
IF 1.7 4区 农林科学 Q4 SOIL SCIENCE Pub Date : 2023-05-25 DOI: 10.1139/cjss-2022-0129
Dani Degenhardt, A. Van Dongen, J. Hudson, N. Utting, Stefan G. Schreiber
This three-year meso-scale greenhouse study used 55-gallon columns to evaluate the survival and growth of boreal wetland communities planted on centrifuge (CF) tailings and co-mixed (CM) tailings capped with different reclamation cover soil capping designs. The CF tailings were capped with a shallow layer (10 and 30 cm) of peat reclamation material (PRM) and the CM tailings were capped with a shallow layer (5 cm) of PRM above (15 or 35 cm) of reclamation subsoil (till). After three years, plant survival and growth on CF tailings showed significant improvement with a 10 cm PRM cap compared to the uncapped tailings, and plants growing on a 30 cm PRM cap outperformed those on the 10 cm PRM cap. Plant growth on CM tailings was significantly improved with a soil cover containing 5 cm PRM and at least 15 cm till. Among the seven native wetland species included in this study, the top performing species survival and above-ground biomass were Salix bebbiana, Scirpus microcarpus and Carex aquatilis.
本中尺度温室研究采用55加仑色谱柱对不同复盖土壤封顶设计的离心(CF)尾矿和共混(CM)尾矿上种植的北方湿地群落的生存和生长进行了评价。CF尾砂覆以10 cm和30 cm的浅泥炭复垦材料(PRM), cm尾砂覆以15 cm或35 cm的浅泥炭复垦底土(till)上5 cm的PRM。3年后,施用10 cm PRM盖层的CF尾矿上植物的生长和存活情况明显优于未施用PRM盖层,施用30 cm PRM盖层的植物生长情况优于施用10 cm PRM盖层。施用5 cm PRM盖层和至少15 cm耕层的cm尾矿上植物生长情况明显改善。在本研究的7种本土湿地物种中,柳(Salix bebbiana)、山菖蒲(Scirpus microcarpus)和水菖蒲(Carex aquatilis)的物种存活率和地上生物量表现最好。
{"title":"Growth and survival of native wetland species in shallow capped centrifuged tailings and co-mixed tailings: A meso-scale greenhouse study","authors":"Dani Degenhardt, A. Van Dongen, J. Hudson, N. Utting, Stefan G. Schreiber","doi":"10.1139/cjss-2022-0129","DOIUrl":"https://doi.org/10.1139/cjss-2022-0129","url":null,"abstract":"This three-year meso-scale greenhouse study used 55-gallon columns to evaluate the survival and growth of boreal wetland communities planted on centrifuge (CF) tailings and co-mixed (CM) tailings capped with different reclamation cover soil capping designs. The CF tailings were capped with a shallow layer (10 and 30 cm) of peat reclamation material (PRM) and the CM tailings were capped with a shallow layer (5 cm) of PRM above (15 or 35 cm) of reclamation subsoil (till). After three years, plant survival and growth on CF tailings showed significant improvement with a 10 cm PRM cap compared to the uncapped tailings, and plants growing on a 30 cm PRM cap outperformed those on the 10 cm PRM cap. Plant growth on CM tailings was significantly improved with a soil cover containing 5 cm PRM and at least 15 cm till. Among the seven native wetland species included in this study, the top performing species survival and above-ground biomass were Salix bebbiana, Scirpus microcarpus and Carex aquatilis.","PeriodicalId":9384,"journal":{"name":"Canadian Journal of Soil Science","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46914011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Non-growing season soil nitrous oxide emissions as influenced by cover crops and fall tillage termination 覆盖作物和秋耕终止对非生长期土壤氮氧化物排放的影响
IF 1.7 4区 农林科学 Q4 SOIL SCIENCE Pub Date : 2023-05-16 DOI: 10.1139/cjss-2023-0017
Yuanpei Gao, Kira A. Borden, Shannon Brown, C. Wagner-Riddle
Cropland soil is a major driver of global nitrous oxide (N2O) emissions. In cold climates, non-growing season (NGS) emissions can be significant due to high fluxes during freeze-thaw (FT) cycles. Cover crops can alter key soil conditions that govern N2O-producing microbial processes, with multiple potential pathways to either increase or decrease N2O production during FT cycles. Cultivating cover crops in the fall to terminate may further disrupt these processes and the overall impact of cover crops on N2O emissions. Yet, few studies have touched on how termination practices of cover crops impact FT emissions over the NGS. Using the flux gradient method to continuously measure N2O emissions from a conventional corn-soybean rotation, we investigated the effects of summer-established cover crops (perennial ryegrass and crimson clover) (with cover crops: +CC; without cover crops: -CC) when terminated by fall cultivation (with fall cultivation: +FC; without fall cultivation: -FC) over a six-month NGS that was characterized by several freezing and thawing periods. Crimson clover cover crop was completely winter killed, while the ryegrass survived on the +CC-FC field. Total NGS (Nov-April) emissions varied nearly 2.5-fold among treatments from 395.1 (-CC-FC) to 978.1 (+CC+FC) g N2O-N ha-1. Compared to the control treatment (-CC-FC), fall cultivation alone (-CC+FC) and cover crops alone (+CC-FC) increased total NGS N2O emissions and fall cultivation with cover crops (+CC+FC) increased N2O fluxes even more. Careful CC species selection and management are important to avoid elevated NGS emissions.
农田土壤是全球一氧化二氮(N2O)排放的主要驱动因素。在寒冷气候下,由于冻融循环期间的高通量,非生长期(NGS)排放可能非常显著。覆盖作物可以改变控制N2O产生微生物过程的关键土壤条件,在FT周期中有多种潜在途径增加或减少N2O的产生。在秋季种植覆盖作物可能会进一步破坏这些过程和覆盖作物对N2O排放的总体影响。然而,很少有研究涉及终止覆盖作物的做法如何影响NGS上的FT排放。利用通量梯度法连续测量常规玉米-大豆轮作N2O排放,研究了夏季建立覆盖作物(多年生黑麦草和深红色三叶草)(覆盖作物:+CC;无覆盖作物:-CC),因秋季种植而终止(有秋季种植:+FC;没有秋季栽培:-FC)在六个月的NGS中,其特征是几个冻结和解冻期。深红色三叶草覆盖作物完全冬季死亡,而黑麦草在+CC-FC田间存活。NGS总排放量(11 - 4月)在395.1 (-CC-FC)和978.1 (+CC+FC) g N2O-N ha-1之间变化了近2.5倍。与对照处理(-CC-FC)相比,单独秋耕(-CC+FC)和单独覆盖作物(+CC-FC)增加了NGS N2O总排放量,覆盖作物(+CC+FC)的秋耕增加了N2O通量。谨慎的CC物种选择和管理对于避免NGS排放的增加至关重要。
{"title":"Non-growing season soil nitrous oxide emissions as influenced by cover crops and fall tillage termination","authors":"Yuanpei Gao, Kira A. Borden, Shannon Brown, C. Wagner-Riddle","doi":"10.1139/cjss-2023-0017","DOIUrl":"https://doi.org/10.1139/cjss-2023-0017","url":null,"abstract":"Cropland soil is a major driver of global nitrous oxide (N2O) emissions. In cold climates, non-growing season (NGS) emissions can be significant due to high fluxes during freeze-thaw (FT) cycles. Cover crops can alter key soil conditions that govern N2O-producing microbial processes, with multiple potential pathways to either increase or decrease N2O production during FT cycles. Cultivating cover crops in the fall to terminate may further disrupt these processes and the overall impact of cover crops on N2O emissions. Yet, few studies have touched on how termination practices of cover crops impact FT emissions over the NGS. Using the flux gradient method to continuously measure N2O emissions from a conventional corn-soybean rotation, we investigated the effects of summer-established cover crops (perennial ryegrass and crimson clover) (with cover crops: +CC; without cover crops: -CC) when terminated by fall cultivation (with fall cultivation: +FC; without fall cultivation: -FC) over a six-month NGS that was characterized by several freezing and thawing periods. Crimson clover cover crop was completely winter killed, while the ryegrass survived on the +CC-FC field. Total NGS (Nov-April) emissions varied nearly 2.5-fold among treatments from 395.1 (-CC-FC) to 978.1 (+CC+FC) g N2O-N ha-1. Compared to the control treatment (-CC-FC), fall cultivation alone (-CC+FC) and cover crops alone (+CC-FC) increased total NGS N2O emissions and fall cultivation with cover crops (+CC+FC) increased N2O fluxes even more. Careful CC species selection and management are important to avoid elevated NGS emissions.","PeriodicalId":9384,"journal":{"name":"Canadian Journal of Soil Science","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45483613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Grazing and fertilizer, compost or manure application effects on a meadow bromegrass pasture on a thick black chernozem I. Productivity and sustainability 厚黑色黑钙土上草地雀麦牧场的放牧和肥料、堆肥或粪肥施用效果I.生产力和可持续性
IF 1.7 4区 农林科学 Q4 SOIL SCIENCE Pub Date : 2023-05-09 DOI: 10.1139/cjss-2022-0041
V. Baron, Campbell Dick, R. Lemke, K. Greer, E. Mapfumo
Short duration, intensive grazing management with high stocking rates may result in sufficient turn-over of nitrogen (N) to compensate for production-limiting soil-N deficiencies for grass pasture. In central Alberta a 0.5 ha block was seeded to ‘Fleet’ meadow bromegrass (Bromus riparius Rehmann) in August, 2002. Within this block, six fenced (9 x 30 m) treatments were established in three replicates. They were: 1. ungrazed–clip removal; 2. grazed – alone; 3 grazed– fertilizer; 4. grazed – fertilizer-compost; 5. grazed - hog manure; 6. grazed – alfalfa (Medicago sativa L.) -grass. Measurements were conducted over a 4-year period between 2003 and 2006 and grazing occurred at identical times as vegetative mass permitted. Biomass was harvested before and after grazing for calculation of dry matter (DM) yield and biomass consumed. Subsamples were used for determination of N concentration and in vitro digestibility. Mean herbage N-yield for grazed treatments was 131% of ungrazed and greatest for grazed-fertilizer and grazed-fertilizer plus compost. Grazed paddocks with no added N produced similar DM yield to those with added N. Estimated nitrogen fixation contributed an annual average of 82 kg ha-1 to herbage-N yield from the alfalfa-grass paddocks. Barley (Hordeum vulgare L.) silage grown after termination of the grazed pastures produced 72% more herbage DM from grazed paddocks than ungrazed, but no significant (P. < 0.05) differences occurred among amendments.
短时间、高放养率的集约放牧管理可能会导致足够的氮(N)转化,以弥补草牧场的生产限制性土壤氮缺乏。2002年8月,在阿尔伯塔省中部,一块0.5公顷的地块被播种到“Fleet”草地雀麦(Bromus riparius Rehmann)上。在该区块内,在三个重复中建立了六个围栏(9 x 30m)处理。它们是:1。未分级–夹子移除;2.独自放牧;3放牧-肥料;4.放牧-肥料堆肥;5.猪粪;6.放牧的苜蓿(Medicago sativa L.)-草。在2003年至2006年的4年时间里进行了测量,放牧发生在植被质量允许的同一时间。在放牧前后收获生物量,以计算干物质(DM)产量和消耗的生物量。子样品用于测定氮浓度和体外消化率。放牧处理的平均牧草氮产量为未分级的131%,其中放牧肥料和放牧肥料加堆肥的平均牧草产量最高。不添加氮的放牧围场产生的DM产量与添加氮的相似。估计的固氮每年平均为苜蓿草围场的牧草氮产量贡献82 kg ha-1。放牧牧场终止后生长的大麦(Hordeum vulgare L.)青贮饲料从放牧围场中产生的牧草DM比未放牧的多72%,但改良剂之间没有显著差异(P<0.05)。
{"title":"Grazing and fertilizer, compost or manure application effects on a meadow bromegrass pasture on a thick black chernozem I. Productivity and sustainability","authors":"V. Baron, Campbell Dick, R. Lemke, K. Greer, E. Mapfumo","doi":"10.1139/cjss-2022-0041","DOIUrl":"https://doi.org/10.1139/cjss-2022-0041","url":null,"abstract":"Short duration, intensive grazing management with high stocking rates may result in sufficient turn-over of nitrogen (N) to compensate for production-limiting soil-N deficiencies for grass pasture. In central Alberta a 0.5 ha block was seeded to ‘Fleet’ meadow bromegrass (Bromus riparius Rehmann) in August, 2002. Within this block, six fenced (9 x 30 m) treatments were established in three replicates. They were: 1. ungrazed–clip removal; 2. grazed – alone; 3 grazed– fertilizer; 4. grazed – fertilizer-compost; 5. grazed - hog manure; 6. grazed – alfalfa (Medicago sativa L.) -grass. Measurements were conducted over a 4-year period between 2003 and 2006 and grazing occurred at identical times as vegetative mass permitted. Biomass was harvested before and after grazing for calculation of dry matter (DM) yield and biomass consumed. Subsamples were used for determination of N concentration and in vitro digestibility. Mean herbage N-yield for grazed treatments was 131% of ungrazed and greatest for grazed-fertilizer and grazed-fertilizer plus compost. Grazed paddocks with no added N produced similar DM yield to those with added N. Estimated nitrogen fixation contributed an annual average of 82 kg ha-1 to herbage-N yield from the alfalfa-grass paddocks. Barley (Hordeum vulgare L.) silage grown after termination of the grazed pastures produced 72% more herbage DM from grazed paddocks than ungrazed, but no significant (P. < 0.05) differences occurred among amendments.","PeriodicalId":9384,"journal":{"name":"Canadian Journal of Soil Science","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46042016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The fate of dissolved sulfamethoxazole during spring-thaw snowmelt in a field with a history of manure application 有施肥历史的田地春季融雪期间溶解的磺胺甲恶唑的命运
IF 1.7 4区 农林科学 Q4 SOIL SCIENCE Pub Date : 2023-05-09 DOI: 10.1139/cjss-2023-0006
H. S. Soto, I. Amarakoon, N. Casson, D. Kumaragamage, H. Wilson
The fate of sulfamethoxazole (SMX) in Prairie agroecosystems during snowmelt is not well understood. This study aims to provide the first estimates of concentrations and loads of SMX in snowmelt in a field with a history of manure application. The mean concentration of SMX throughout the snowmelt period was 0.0345 ± 0.066 µg/L. The SMX cumulative load was 3.81 ± 3.4 µg/L with a range of 1.03 – 12.8 µg/L. Both the concentration and load were not influenced by the method of manure application (i.e., surface applied versus sub-surface applied).
融雪期间磺胺甲恶唑(SMX)在草原农业生态系统中的命运尚不清楚。本研究旨在首次估计有施肥历史的田地融雪中SMX的浓度和负荷。整个融雪期SMX的平均浓度为0.0345±0.066µg/L。SMX累积负荷为3.81±3.4µg/L,范围为1.03–12.8µg/L。浓度和负荷均不受施用粪肥方法的影响(即表面施用与亚表面施用)。
{"title":"The fate of dissolved sulfamethoxazole during spring-thaw snowmelt in a field with a history of manure application","authors":"H. S. Soto, I. Amarakoon, N. Casson, D. Kumaragamage, H. Wilson","doi":"10.1139/cjss-2023-0006","DOIUrl":"https://doi.org/10.1139/cjss-2023-0006","url":null,"abstract":"The fate of sulfamethoxazole (SMX) in Prairie agroecosystems during snowmelt is not well understood. This study aims to provide the first estimates of concentrations and loads of SMX in snowmelt in a field with a history of manure application. The mean concentration of SMX throughout the snowmelt period was 0.0345 ± 0.066 µg/L. The SMX cumulative load was 3.81 ± 3.4 µg/L with a range of 1.03 – 12.8 µg/L. Both the concentration and load were not influenced by the method of manure application (i.e., surface applied versus sub-surface applied).","PeriodicalId":9384,"journal":{"name":"Canadian Journal of Soil Science","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47521116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Compost and biosolids increase long-term soil organic carbon stocks 堆肥和生物固体增加了长期土壤有机碳储量
IF 1.7 4区 农林科学 Q4 SOIL SCIENCE Pub Date : 2023-05-03 DOI: 10.1139/cjss-2022-0104
Emmanuel Badewa, Chun C. Yeung, J. Whalen, M. Oelbermann
Biobased residues derived from organic urban waste materials can be processed to produce soil amendments that enhance soil fertility and carbon sequestration. However, the extent of carbon sequestration by biobased residues depends on the interaction between their physicochemical properties, climate, and agroecosystem management practices. Our objective was to predict how different biobased residues (compost, anaerobic digestate or biosolids), compared to nitrogen fertilizer, affect soil organic carbon stocks under continuous cropping and crop rotation in Ontario, Canada, using the Century model. The Century model was calibrated and validated with data, from a three-year field study located in Elora, Ontario, Canada, that was used to predict long-term changes in soil organic carbon. Our results showed that after 150 years, soil amended with compost and biosolids increased soil organic carbon stocks significantly (p<0.05) compared to anaerobic digestate and nitrogen fertilizer. Soil organic carbon stocks were 1 to 27% greater with crop rotation compared to continuous cropping. Model performance indicated a strong correlation between measured and simulated soil organic carbon stocks (R2 = 0.26 to 0.82; RMSD = 432 to 727 g m-2). Our findings suggested that compost had the greatest soil carbon sequestration potential of the tested soil amendments, and this difference was due to the quantity and quality of carbon input.
从城市有机废物中提取的生物基残留物可以进行处理,生产土壤改良剂,提高土壤肥力和固碳能力。然而,生物基残留物的固碳程度取决于其物理化学性质、气候和农业生态系统管理实践之间的相互作用。我们的目标是使用Century模型预测在加拿大安大略省连作和轮作条件下,与氮肥相比,不同的生物基残留物(堆肥、厌氧消化物或生物固体)如何影响土壤有机碳储量。Century模型是用加拿大安大略省埃洛拉市一项为期三年的实地研究的数据进行校准和验证的,该研究用于预测土壤有机碳的长期变化。我们的研究结果表明,150年后,与厌氧消化物和氮肥相比,用堆肥和生物固体改良的土壤显著增加了土壤有机碳储量(p<0.05)。与连作相比,轮作的土壤有机碳储量增加了1-27%。模型性能表明,测量和模拟的土壤有机碳储量之间存在很强的相关性(R2=0.26至0.82;RMSD=432至727 g/m-2)。我们的研究结果表明,在测试的土壤改良剂中,堆肥具有最大的土壤固碳潜力,这种差异是由于碳输入的数量和质量造成的。
{"title":"Compost and biosolids increase long-term soil organic carbon stocks","authors":"Emmanuel Badewa, Chun C. Yeung, J. Whalen, M. Oelbermann","doi":"10.1139/cjss-2022-0104","DOIUrl":"https://doi.org/10.1139/cjss-2022-0104","url":null,"abstract":"Biobased residues derived from organic urban waste materials can be processed to produce soil amendments that enhance soil fertility and carbon sequestration. However, the extent of carbon sequestration by biobased residues depends on the interaction between their physicochemical properties, climate, and agroecosystem management practices. Our objective was to predict how different biobased residues (compost, anaerobic digestate or biosolids), compared to nitrogen fertilizer, affect soil organic carbon stocks under continuous cropping and crop rotation in Ontario, Canada, using the Century model. The Century model was calibrated and validated with data, from a three-year field study located in Elora, Ontario, Canada, that was used to predict long-term changes in soil organic carbon. Our results showed that after 150 years, soil amended with compost and biosolids increased soil organic carbon stocks significantly (p<0.05) compared to anaerobic digestate and nitrogen fertilizer. Soil organic carbon stocks were 1 to 27% greater with crop rotation compared to continuous cropping. Model performance indicated a strong correlation between measured and simulated soil organic carbon stocks (R2 = 0.26 to 0.82; RMSD = 432 to 727 g m-2). Our findings suggested that compost had the greatest soil carbon sequestration potential of the tested soil amendments, and this difference was due to the quantity and quality of carbon input.","PeriodicalId":9384,"journal":{"name":"Canadian Journal of Soil Science","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47174940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of an Extended Schnute Model for more Physically Realistic Representations of Soil Water Retention and Moisture Capacity Curves 开发一个扩展的Schnute模型,用于更真实地表示土壤保水和含水量曲线
IF 1.7 4区 农林科学 Q4 SOIL SCIENCE Pub Date : 2023-05-03 DOI: 10.1139/cjss-2023-0014
W. D. Reynolds, C. Drury, P. Handyside
Commonly used soil water retention, θ(h), and moisture capacity, C(h), functions implicitly assume that: i) the θ(h) data curve is sigmoid-shaped with an inflection; and ii) the C(h) data curve has a value of zero at soil saturation. Desorption measurements on intact soils indicate, however, that the θ(h) data curve is frequently convex-monotonic in shape with no inflection, and C(h) at saturation is often a finite negative value rather than zero. As these model-data mismatches may cause substantial error in simulation or prediction of near-saturated soil hydraulic properties and water flow, a new “Extended Schnute” θ(h)-C(h) function was proposed that can provide θ(h) curve shapes and saturated C(h) values which are consistent with θ(h) and C(h) measurements. The new function and/or its nested Schnute sub-model provided high-quality and physically realistic fits to desorption data collected from intact cores of coarse sand, loamy sand, loam, clay loam, sandy clay loam, clay and organic clay soils; and it out-performed or equalled the three-parameter van Genuchten θ(h)-C(h) function for every data-set. The new function also provided accurate and physically realistic representations of θ(h) and C(h) data from structured soils containing macropores and strongly graded pore size distributions. It was concluded that the Extended Schnute model is capable of providing accurate and physically realistic representations for a wide range of θ(h) and C(h) data, and it was further recommended that this model be considered over other models when measurements indicate that θ(h) is convex-monotonic in shape and/or C(h) is not zero at soil saturation.
常用的土壤持水率θ(h)和持水量C(h)函数隐含地假设:i)θ(h)数据曲线是带拐点的S形;以及ii)C(h)数据曲线在土壤饱和时具有零值。然而,对完整土壤的解吸测量表明,θ(h)数据曲线的形状通常是凸单调的,没有拐点,饱和时的C(h)通常是有限的负值,而不是零。由于这些模型数据的不匹配可能会在模拟或预测接近饱和的土壤水力特性和水流时造成很大的误差,因此提出了一种新的“扩展Schnute”θ(h)-C(h)函数,该函数可以提供与θ(h)和C(h)测量值一致的θ(h。新函数和/或其嵌套的Schnute子模型为从粗砂、壤土、壤土、粘壤土、砂质粘壤土、粘土和有机粘土的完整岩芯中收集的解吸数据提供了高质量和物理现实的拟合;θ(h)-C(h)函数。新函数还提供了来自含有大孔隙和强级配孔径分布的结构性土壤的θ(h)和C(h)数据的精确和物理现实的表示。得出的结论是,扩展的Schnute模型能够为大范围的θ(h)和C(h)数据提供准确和物理现实的表示,并且进一步建议,当测量结果表明θ(h)在形状上是凸单调的和/或在土壤饱和时C(h)不为零时,该模型应优于其他模型。
{"title":"Development of an Extended Schnute Model for more Physically Realistic Representations of Soil Water Retention and Moisture Capacity Curves","authors":"W. D. Reynolds, C. Drury, P. Handyside","doi":"10.1139/cjss-2023-0014","DOIUrl":"https://doi.org/10.1139/cjss-2023-0014","url":null,"abstract":"Commonly used soil water retention, θ(h), and moisture capacity, C(h), functions implicitly assume that: i) the θ(h) data curve is sigmoid-shaped with an inflection; and ii) the C(h) data curve has a value of zero at soil saturation. Desorption measurements on intact soils indicate, however, that the θ(h) data curve is frequently convex-monotonic in shape with no inflection, and C(h) at saturation is often a finite negative value rather than zero. As these model-data mismatches may cause substantial error in simulation or prediction of near-saturated soil hydraulic properties and water flow, a new “Extended Schnute” θ(h)-C(h) function was proposed that can provide θ(h) curve shapes and saturated C(h) values which are consistent with θ(h) and C(h) measurements. The new function and/or its nested Schnute sub-model provided high-quality and physically realistic fits to desorption data collected from intact cores of coarse sand, loamy sand, loam, clay loam, sandy clay loam, clay and organic clay soils; and it out-performed or equalled the three-parameter van Genuchten θ(h)-C(h) function for every data-set. The new function also provided accurate and physically realistic representations of θ(h) and C(h) data from structured soils containing macropores and strongly graded pore size distributions. It was concluded that the Extended Schnute model is capable of providing accurate and physically realistic representations for a wide range of θ(h) and C(h) data, and it was further recommended that this model be considered over other models when measurements indicate that θ(h) is convex-monotonic in shape and/or C(h) is not zero at soil saturation.","PeriodicalId":9384,"journal":{"name":"Canadian Journal of Soil Science","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45435517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Land use in the Prairie Pothole Region influences the soil bacterial community composition and relative abundance of nitrogen cycling genes. 草原坑区土地利用方式影响土壤细菌群落组成和氮循环基因相对丰度。
IF 1.7 4区 农林科学 Q4 SOIL SCIENCE Pub Date : 2023-05-02 DOI: 10.1139/cjss-2022-0121
J. Town, Min Yu, R. Lemke, B. Helgason
The undulating topography of Prairie Pothole Region of North America creates spatial and temporal variability in soil moisture and nutrient levels, affecting microbial community processes and GHG emissions. By identifying differences in soil bacterial and archaeal community composition and the abundance of nitrogen cycling genes in permanent cover vs. annual crop land over two growing seasons (2017 and 2018), we were able to assess the effects of topography and land use on the functional capacity of the soil microbiome. Permanent grassland cover was associated with higher bacterial diversity in upland positions and lower diversity in low lying depressions. Bacterial community composition was also significantly different between cultivated and permanent cover at all points along the topographic slope, with the largest effects seen in the footslope and backslope positions. Compared to permanent cover, soil from annual cropland had consistently more abundant nitrifiers, including Nitrospira in the toeslope and backslope, and Nitrososphaeraceae in the shoulder and knoll samples while soils from permanent cover had a greater abundance of several Alphaproteobacteria from Rhodospirillales and Hyphomicrobiaceae across multiple upland positions. Upland soils from annual cropland also had consistently higher abundance of both bacterial and archaeal ammonia oxidizing (amoA) genes and a higher ratio of nirK:nirS genes compared to those from permanent cover. These differences in microbial community composition were associated with higher N2O and CO2 emissions in upland soils in annual cropland, however there were no differences in GHG emissions between the two systems in low lying positions.
北美草原坑洼区起伏的地形造成了土壤水分和养分水平的时空变异,影响了微生物群落过程和温室气体排放。通过鉴定永久覆盖地与一年生作物地在两个生长季节(2017年和2018年)土壤细菌和古菌群落组成以及氮循环基因丰度的差异,我们能够评估地形和土地利用对土壤微生物群功能能力的影响。永久草地覆盖与高地较高的细菌多样性和低洼地区较低的细菌多样性相关。沿地形坡面各点的细菌群落组成在栽培植被和永久植被之间也存在显著差异,在坡脚和坡背位置的影响最大。与永久覆盖相比,一年生农田土壤具有更丰富的硝化菌,包括趾坡和后坡的硝化螺旋菌,以及肩部和小丘的硝化螺旋菌科,而永久覆盖土壤在多个高地位置具有更丰富的Rhodospirillales和菌丝微生物科的几种Alphaproteobacteria。常年耕作的旱地土壤中细菌和古细菌氨氧化(amoA)基因的丰度和nirK:nirS基因的比例也始终高于常年覆盖的旱地土壤。这些微生物群落组成的差异与一年生旱地土壤中较高的N2O和CO2排放有关,但在低洼地区,两个系统之间的温室气体排放没有差异。
{"title":"Land use in the Prairie Pothole Region influences the soil bacterial community composition and relative abundance of nitrogen cycling genes.","authors":"J. Town, Min Yu, R. Lemke, B. Helgason","doi":"10.1139/cjss-2022-0121","DOIUrl":"https://doi.org/10.1139/cjss-2022-0121","url":null,"abstract":"The undulating topography of Prairie Pothole Region of North America creates spatial and temporal variability in soil moisture and nutrient levels, affecting microbial community processes and GHG emissions. By identifying differences in soil bacterial and archaeal community composition and the abundance of nitrogen cycling genes in permanent cover vs. annual crop land over two growing seasons (2017 and 2018), we were able to assess the effects of topography and land use on the functional capacity of the soil microbiome. Permanent grassland cover was associated with higher bacterial diversity in upland positions and lower diversity in low lying depressions. Bacterial community composition was also significantly different between cultivated and permanent cover at all points along the topographic slope, with the largest effects seen in the footslope and backslope positions. Compared to permanent cover, soil from annual cropland had consistently more abundant nitrifiers, including Nitrospira in the toeslope and backslope, and Nitrososphaeraceae in the shoulder and knoll samples while soils from permanent cover had a greater abundance of several Alphaproteobacteria from Rhodospirillales and Hyphomicrobiaceae across multiple upland positions. Upland soils from annual cropland also had consistently higher abundance of both bacterial and archaeal ammonia oxidizing (amoA) genes and a higher ratio of nirK:nirS genes compared to those from permanent cover. These differences in microbial community composition were associated with higher N2O and CO2 emissions in upland soils in annual cropland, however there were no differences in GHG emissions between the two systems in low lying positions.","PeriodicalId":9384,"journal":{"name":"Canadian Journal of Soil Science","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42431894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
期刊
Canadian Journal of Soil Science
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1