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Nutrient contents and microbial communities as mediators of the effects of land-use in ecosystem functioning in alpine ecosystems from Central Mexico 养分含量和微生物群落是土地利用对墨西哥中部高山生态系统生态系统功能影响的中介因素
IF 3.6 3区 农林科学 Q3 ENVIRONMENTAL SCIENCES Pub Date : 2024-05-11 DOI: 10.1007/s11368-024-03804-y
Karen Carrasco-Espinosa, Morena Avitia, Nadia S. Santini, Ana E. Escalante

Purpose

The interplay between microbial taxonomy, functional diversity, and land-use changes across diverse ecosystems must be better understood. This study explores, through a statistical modeling approach, the intricate relationships between microbial communities, soil properties (nutrient contents and physicochemical parameters), and land-use changes, using stable isotopes ratio (δ13C/δ15N) as ecosystem function indicator.

Methods

Using Structural Equation Modeling (SEM) this study aims to investigate how soil microbial communities, soil properties and ecosystem function are interconnected in three ecosystems undergoing land-use change in Nevado de Toluca, Mexico.

Results

Multivariate analyses of microbial communities and soil parameters for the different land-uses reveal significant variation in both microbial composition and soil properties (i.e. nutrient contents) mainly explained by the land-use history of the studied ecosystems. Through the SEM approach, it was possible to disentangle the relative contribution of land-use change, microbial community composition and nutrient contents to the ecosystem function defined as the δ13C/δ15N ratio.

Conclusions

Microbial communities are the main drivers of soil ecosystem functioning. However, through SEM approach it is possible to formally test direct and indirect relationships impacting microbial communities and the resulting functional consequences, contributing to a mechanistic understanding of the ecological implications of land-use change, aiding in sustainable land-use decision-making.

目的 必须更好地了解不同生态系统中微生物分类、功能多样性和土地利用变化之间的相互作用。本研究以稳定同位素比值(δ13C/δ15N)作为生态系统功能指标,通过统计建模方法探讨微生物群落、土壤特性(养分含量和理化参数)以及土地利用变化之间的复杂关系。方法本研究采用结构方程建模(SEM)方法,旨在研究墨西哥内瓦多-德-托卢卡(Nevado de Toluca)三个正在经历土地利用变化的生态系统中,土壤微生物群落、土壤特性和生态系统功能是如何相互关联的。结果对不同土地利用下的微生物群落和土壤参数进行多元分析后发现,微生物组成和土壤特性(即养分含量)都存在显著差异,这主要是由所研究生态系统的土地利用历史造成的。通过 SEM 方法,有可能将土地利用变化、微生物群落组成和养分含量对生态系统功能(定义为 δ13C/δ15N 比率)的相对贡献区分开来。然而,通过 SEM 方法可以正式检验影响微生物群落的直接和间接关系以及由此产生的功能后果,有助于从机理上理解土地利用变化对生态的影响,有助于可持续的土地利用决策。
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引用次数: 0
Feasibility study of PAHs contaminated soil remediation by Buchloe dactyloides (Nutt.) Engelm combined with biochar 用 Buchloe dactyloides (Nutt.) Engelm 与生物炭结合修复多环芳烃污染土壤的可行性研究
IF 3.6 3区 农林科学 Q3 ENVIRONMENTAL SCIENCES Pub Date : 2024-05-11 DOI: 10.1007/s11368-024-03807-9
Yuancheng Wang, Ao Li, Xia Li, Jiahui Yin, Xiaoxia Li, Yufeng Chen, Bokun Zou, Yongqiang Qian, Zhenyuan Sun

Purpose

Although the combined plant-biochar remediation in improving soil contaminated by polycyclic aromatic hydrocarbons (PAHs) is considered efficient (Singha and Pandey in Crit Rev Biotechnol 41:749–766, 2021), the potential for application remains poorly known. This study used clones of Buchloe dactyloides to evaluate the effects of biochar on the capability of phytoremediation and rhizosphere soil contaminated with PAH.

Materials and methods

Pot experiments were conducted to assess the effects of biochar on growth physiological parameters of B. dactyloides growth, accumulation of PAHs in B. dactyloides, and soil environment.

Results and discussion

The results showed that the application of biochar increased the levels of antioxidants (free proline, glutathione, and ascorbic acid), antioxidant enzymes (catalase and laccase), and phytohormones (abscisic acid, indole acetic acid, jasmonic acid, salicylic acid, and gibberellin), decreased the accumulation of reactive oxygen species and lipid peroxidation in the roots, thereby enhancing the antioxidant defense ability and improving PAHs tolerance in roots of B. dactyloides. Moreover, the activities of enzymes (catalase, dehydrogenases, urease and protease) and soil nutrients in the rhizosphere soil were significantly increased, the content of PAHs decreased, and the health of the rhizosphere soil was improved.

Conclusions

Biochar treatment promoted the accumulation of PAHs, improved soil environment and significantly enhanced the effects of phytoremediation. Therefore, the combined application of B. dactyloides and biochar can be considered as a feasible approach for the phytoremediation of PAH-contaminated soil.

目的 虽然植物-生物炭联合修复被多环芳烃(PAHs)污染的土壤被认为是有效的(Singha 和 Pandey 在 Crit Rev Biotechnol 41:749-766, 2021 中),但其应用潜力仍鲜为人知。本研究利用 Buchloe dactyloides 的克隆来评估生物炭对植物修复能力和多环芳烃污染的根瘤土壤的影响。材料和方法进行了盆栽实验,以评估生物炭对 B. dactyloides 生长的生理参数、B. dactyloides 中多环芳烃的积累以及土壤环境的影响。结果与讨论结果表明,施用生物炭提高了抗氧化剂(游离脯氨酸、谷胱甘肽和抗坏血酸)、抗氧化酶(过氧化氢酶和漆酶)和植物激素(脱落酸、吲哚乙酸、茉莉酸、水杨酸和赤霉素)的水平,减少了根中活性氧的积累和脂质过氧化,从而增强了根的抗氧化防御能力,提高了根对多环芳烃的耐受性。dactyloides根系对多环芳烃的耐受性。此外,根瘤土壤中酶(过氧化氢酶、脱氢酶、脲酶和蛋白酶)和土壤养分的活性显著提高,多环芳烃含量降低,根瘤土壤的健康状况得到改善。因此,在多环芳烃污染土壤的植物修复中,联合应用 B. dactyloides 和生物炭是一种可行的方法。
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引用次数: 0
Acid-modified cotton straw biochar has instructive for the improvement of saline-alkali soil 酸改性棉秆生物炭对改良盐碱地具有指导意义
IF 3.6 3区 农林科学 Q3 ENVIRONMENTAL SCIENCES Pub Date : 2024-05-08 DOI: 10.1007/s11368-024-03800-2
Xiaoyang Xia, Muhammad Riaz, Saba Babar, Yuxuan Li, Xiangling Wang, Jiyuan Wang, Cuncang Jiang

Purpose

Soil salinization severely hinders the development of agriculture. Pristine biochar (BC) has a considerable impact on improving soil quality and maximizing crop yield. However, applying biochar has the risk of aggravating soil salinization. Acid-modified biochar may have a good effect on the improvement of saline-alkali soil.

Methods

Nitric acid and phosphoric acid were used to modify the pristine biochar (BC). The pristine biochar (BC), nitric acid-modified biochar (NC) and phosphoric acid-modified biochar (PC) were used at 1%, 2%, and 3% (w/w), respectively. There were ten treatments in total: CK, BC1, BC2, BC3, NC1, NC2, NC3, PC1, PC2, and PC3.

Results

Our results indicated that the application of biochar further aggravated soil salinization. Soil pH and EC significantly increased by 0.08–0.42 units and 215.51–362.07 μS.cm−1, respectively. Additionally, the BC application reduced the activities of C-, N- and P-acquiring enzymes in saline-alkali soil. Compared with BC, NC and PC decreased the alkaline metal elements by 84.34% and 79.29%, respectively, and enhanced the specific surface area. Acid-modified biochar significantly reduced the content of Na+, Cl, SO42−, CO32− and HCO3. Meanwhile, the application of acid-modified biochar reduced soil pH and EC by 0.16–0.59 units, 228.38–788.93 μS.cm−1, respectively. Furthermore, the application of acid-modified biochar enhanced N fixation ability and the activity of C-acquiring enzymes and P-acquiring enzymes.

Conclusions

The application of pristine cotton straw biochar will further aggravate soil salinization, thereby inhibiting the soil enzyme activities. In contrast, acid-modified cotton straw biochar can reduce soil salinity, improve soil available nutrients and also enhance the enzymatic activities, which is advantageous to the restoration of saline-alkali soil.

目的土壤盐碱化严重阻碍了农业的发展。纯净的生物炭(BC)对改善土壤质量和最大限度地提高作物产量有很大影响。然而,施用生物炭有可能加剧土壤盐碱化。方法用硝酸和磷酸对原始生物炭(BC)进行改性。原始生物炭(BC)、硝酸改性生物炭(NC)和磷酸改性生物炭(PC)的使用浓度分别为 1%、2% 和 3%(重量比)。结果表明,施用生物炭进一步加剧了土壤盐碱化。土壤 pH 值和 EC 值分别明显增加了 0.08-0.42 个单位和 215.51-362.07 μS.cm-1。此外,施用 BC 还降低了盐碱地中 C、N 和 P 获取酶的活性。与 BC 相比,NC 和 PC 分别减少了 84.34% 和 79.29% 的碱金属元素,并增加了比表面积。酸改性生物炭显著降低了 Na+、Cl-、SO42-、CO32- 和 HCO3-的含量。同时,施用酸改性生物炭后,土壤 pH 值和 EC 值分别降低了 0.16-0.59 个单位、228.38-788.93 μS.cm-1。结论原生棉秆生物炭的施用会进一步加剧土壤盐碱化,从而抑制土壤酶的活性。相比之下,酸改性棉秆生物炭能降低土壤盐渍化程度,提高土壤可利用养分,还能增强酶的活性,有利于盐碱地的修复。
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引用次数: 0
Flaveria bidentis invasion modifies soil physicochemical properties and increases microorganism community diversity 黄花菜入侵改变了土壤理化性质,增加了微生物群落多样性
IF 3.6 3区 农林科学 Q3 ENVIRONMENTAL SCIENCES Pub Date : 2024-05-07 DOI: 10.1007/s11368-024-03810-0
Shuaiying Zhang, Jiantao Liu, Haixia Zhao, Qiao Li, Han Zhang, Mengxin Zhao

Purpose

The invasive plant Flaveria bidentis (L.) Kuntze, known as the "ecological killer", poses a significant threat to the ecosystem stability due to its strong phenotypic plasticity and high fertility. Previous studies have reported a close relationship between plant invasion and soil microbial communities. This study aimed to gain a deeper understanding of the relationship between the invasion of F. bidentis, the diversity of soil microbial communities, and soil physiochemical properties.

Methods

In this study, we established a common garden experiment by planting F. bidentis and Chenopodium ficifolium Sm. separately and mixed, in Lanfang, China. We analyzed microbial communities in both bulk soil and rhizosphere soil using the high-throughput sequencing technology.

Results

The results showed that F. bidentis invasion significantly increased bacterial and fungal diversities in rhizosphere soil, irrelevant with or without the existence of native plant species. Meanwhile, F. bidentis increased the content of organic matter and ammonium nitrogen (NH4+) in bulk soil and decrease the content of NH4+ in rhizosphere soil. Significant correlations were observed between nitrogen contents or acid phosphatase and specific soil microbial communities.

Conclusions

These results underly that regardless of competition with native plants, the invasion of F. bidentis alters soil physicochemical properties and increases microorganism community diversity. This study establishes a theoretical foundation for further research on the invasion mechanisms of F. bidentis and provides valuable references for other studies about F. bidentis.

目的 被称为 "生态杀手 "的入侵植物Flaveria bidentis (L.) Kuntze,由于其表型可塑性强、肥力高,对生态系统的稳定性构成了严重威胁。以往的研究表明,植物入侵与土壤微生物群落之间存在密切关系。本研究旨在更深入地了解双子叶榕入侵、土壤微生物群落多样性和土壤理化性质之间的关系。结果表明,无论是否存在本地植物物种,二叉金花的入侵都显著增加了根圈土壤中细菌和真菌的多样性。同时,双叉穗状花序菌增加了土壤中有机质和铵态氮(NH4+)的含量,降低了根圈土壤中 NH4+的含量。这些结果表明,无论是否与本地植物竞争,双叉蕨入侵都会改变土壤理化性质并增加微生物群落多样性。本研究为进一步研究二叉金线莲的入侵机制奠定了理论基础,并为其他有关二叉金线莲的研究提供了有价值的参考。
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引用次数: 0
Metavirome mining from fjord sediments of Svalbard Archipelago 从斯瓦尔巴群岛的峡湾沉积物中挖掘元病毒体
IF 3.6 3区 农林科学 Q3 ENVIRONMENTAL SCIENCES Pub Date : 2024-05-07 DOI: 10.1007/s11368-024-03809-7
Bhavya Kachiprath, Jayanath Gopi, Manomi Sarasan, Jayesh Puthumana, E. R. Chaithanya, Rosamma Philip

Purpose

Viruses are the largest genetic repository and most diverse host-associated replicating organisms in a wide range of ecosystems in the entire biosphere. Although playing crucial roles in numerous processes such as nutrient cycles, viral shunt, and population control within marine ecosystems, viral communities continue to be the least explored biological entities, particularly in extreme marine habitats. Therefore, details about the viral diversity and their metabolic potential from Arctic sediments has great importance.

Methods

Sediment samples were collected from two Arctic fjords, Kongsfjorden and Krossfjorden, in Svalbard. Viral nucleic acids were extracted from both fjord sediments after a pre-processing step. Illumina Novaseq based shotgun sequencing was performed and bioinformatic analysis was done to explore viral communities and their functional potential.

Results

An array of DNA and RNA viruses especially bacteriophages along with viruses infecting algae, plants, molluscs, shrimps, fishes, amphibians, reptiles, birds, humans, and other mammals were detected from both fjords. The double-stranded DNA viruses were the most abundant (Siphoviridae, Podoviridae, Myoviridae, and Phycodnaviridae), followed by single-stranded DNA (Inoviridae) and RNA (Retroviridae and Betaflexiviridae) viruses from both metavirome. Functional analysis explored genes encoding virus structures, enzymes for phage replication, integration and excision and proteins related to phage regulation of gene expression.

Conclusions

Fjord metavirome analysis revealed the occurrence of virus groups endemic to Arctic freshwater and marine habitats along with an extra pool of unclassified or unassigned virus reads. Viruses infecting a variety of bacterial groups, and other higher trophic levels in fjord environments were explored. Functional annotation revealed the abundance of phage-related structural genes and metabolic genes. Comparative analysis revealed the abundance of dsDNA viruses from Caudovirales (Myoviridae, Podoviridae and Siphoviridae) in all the analysed Arctic samples in different proportions. The present study enhances our understanding of viral diversity and their metabolic potential in Arctic fjord sediments.

目的病毒是整个生物圈广泛生态系统中最大的基因库和最多样化的宿主相关复制生物。虽然病毒群落在海洋生态系统的营养循环、病毒分流和种群控制等众多过程中发挥着至关重要的作用,但它仍然是探索最少的生物实体,尤其是在极端的海洋生境中。因此,详细了解北极沉积物中的病毒多样性及其新陈代谢潜力具有重要意义。经过预处理步骤后,从这两个峡湾的沉积物中提取了病毒核酸。结果 在两个峡湾中都检测到了一系列 DNA 和 RNA 病毒,尤其是噬菌体病毒,以及感染藻类、植物、软体动物、虾、鱼类、两栖动物、爬行动物、鸟类、人类和其他哺乳动物的病毒。双链 DNA 病毒数量最多(Siphoviridae、Podoviridae、Myoviridae 和 Phycodnaviridae),其次是单链 DNA 病毒(Inoviridae)和 RNA 病毒(Retroviridae 和 Betaflexiviridae)。功能分析探讨了编码病毒结构的基因、噬菌体复制、整合和切除的酶以及与噬菌体调控基因表达有关的蛋白质。研究还探讨了峡湾环境中感染各种细菌群和其他较高营养级的病毒。功能注释显示了噬菌体相关结构基因和代谢基因的丰富程度。比较分析表明,在所有分析的北极样本中,dsDNA 病毒(Caudovirales)(Myoviridae、Podoviridae 和 Siphoviridae)的数量和比例各不相同。本研究加深了我们对北极峡湾沉积物中病毒多样性及其代谢潜力的了解。
{"title":"Metavirome mining from fjord sediments of Svalbard Archipelago","authors":"Bhavya Kachiprath, Jayanath Gopi, Manomi Sarasan, Jayesh Puthumana, E. R. Chaithanya, Rosamma Philip","doi":"10.1007/s11368-024-03809-7","DOIUrl":"https://doi.org/10.1007/s11368-024-03809-7","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Purpose</h3><p>Viruses are the largest genetic repository and most diverse host-associated replicating organisms in a wide range of ecosystems in the entire biosphere. Although playing crucial roles in numerous processes such as nutrient cycles, viral shunt, and population control within marine ecosystems, viral communities continue to be the least explored biological entities, particularly in extreme marine habitats. Therefore, details about the viral diversity and their metabolic potential from Arctic sediments has great importance.</p><h3 data-test=\"abstract-sub-heading\">Methods</h3><p>Sediment samples were collected from two Arctic fjords, Kongsfjorden and Krossfjorden, in Svalbard. Viral nucleic acids were extracted from both fjord sediments after a pre-processing step. Illumina Novaseq based shotgun sequencing was performed and bioinformatic analysis was done to explore viral communities and their functional potential.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>An array of DNA and RNA viruses especially bacteriophages along with viruses infecting algae, plants, molluscs, shrimps, fishes, amphibians, reptiles, birds, humans, and other mammals were detected from both fjords. The double-stranded DNA viruses were the most abundant (Siphoviridae, Podoviridae, Myoviridae, and Phycodnaviridae), followed by single-stranded DNA (Inoviridae) and RNA (Retroviridae and Betaflexiviridae) viruses from both metavirome. Functional analysis explored genes encoding virus structures, enzymes for phage replication, integration and excision and proteins related to phage regulation of gene expression.</p><h3 data-test=\"abstract-sub-heading\">Conclusions</h3><p>Fjord metavirome analysis revealed the occurrence of virus groups endemic to Arctic freshwater and marine habitats along with an extra pool of unclassified or unassigned virus reads. Viruses infecting a variety of bacterial groups, and other higher trophic levels in fjord environments were explored. Functional annotation revealed the abundance of phage-related structural genes and metabolic genes. Comparative analysis revealed the abundance of dsDNA viruses from Caudovirales (Myoviridae, Podoviridae and Siphoviridae) in all the analysed Arctic samples in different proportions. The present study enhances our understanding of viral diversity and their metabolic potential in Arctic fjord sediments.</p>","PeriodicalId":17139,"journal":{"name":"Journal of Soils and Sediments","volume":"161 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140882739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Persistence of soil microbial residuals and lignin phenols in forest ecosystems along the latitude gradient 沿纬度梯度森林生态系统中土壤微生物残留物和木质素酚的持久性
IF 3.6 3区 农林科学 Q3 ENVIRONMENTAL SCIENCES Pub Date : 2024-05-04 DOI: 10.1007/s11368-024-03794-x
Qiaoling Lin, Qiuxiang Tian, Chang Liao, Xudong Yuan, Mengzhen Lu, Feng Liu

Aims

Soil organic carbon (SOC) storage is mainly governed by inputs from plant and microbial sources. How the relative contributions of these two sources in forest soils vary along broad-scale environmental gradients is poorly understood. The contributions of these two carbon sources in different soil layers are also elusive.

Methods

We used amino sugar and lignin phenol as biomarkers to indicate microbial- and plant-derived soil carbon. The concentrations of amino sugar and lignin phenol in topsoil (0–10 cm) and subsoil (30–60 cm) of major forest types along a latitude gradient in China were investigated.

Results

The concentration of soil amino sugar decreased along the latitude in topsoil, which is mainly controlled by the variations in mean annual temperature and soil nitrogen. The concentration of lignin phenols decreased along latitude in topsoil, mainly controlled by soil carbon/nitrogen ratio. The microbial-derived carbon was mainly composed of fungi-derived in topsoil, while bacteria-derived dominated in subsoil. Climate and soil properties are primary factors controlling the persistence of microbial residues and lignin phenols in topsoil, and soil clay is the crucial factor in the subsoil.

Conclusions

Both microbial residuals and lignin phenols in topsoil showed a decreasing trend with increasing latitude, but controlled by different sets of environmental factors. Subsoil microbial residues and lignin phenols showed no trend along the latitude and are mainly influenced by soil clay content.These findings provide new insights on how climate and vegetation affect soil carbon persistence, revealing significant distribution patterns of forest soil microbial residuals and lignin phenols along a latitude gradient.

目的土壤有机碳(SOC)储存主要受植物和微生物输入的影响。人们对这两种碳源在森林土壤中的相对贡献如何随着大尺度环境梯度而变化还知之甚少。我们使用氨基糖和木质素酚作为生物标记来指示微生物和植物来源的土壤碳。结果表层土壤中氨基酸糖的浓度随纬度的升高而降低,这主要受年平均温度和土壤氮素变化的影响;木质素酚的浓度随纬度的升高而降低,这主要受年平均温度和土壤氮素变化的影响。表土中木质素酚的浓度随纬度的变化而降低,主要受土壤碳氮比的控制。微生物衍生碳在表土中主要由真菌衍生,而在底土中则以细菌衍生为主。气候和土壤特性是控制表层土壤中微生物残留物和木质素酚持久性的主要因素,而土壤粘土则是控制底层土壤中微生物残留物和木质素酚持久性的关键因素。这些发现揭示了森林土壤微生物残留物和木质素酚在纬度梯度上的显著分布模式,为气候和植被如何影响土壤碳的持久性提供了新的见解。
{"title":"Persistence of soil microbial residuals and lignin phenols in forest ecosystems along the latitude gradient","authors":"Qiaoling Lin, Qiuxiang Tian, Chang Liao, Xudong Yuan, Mengzhen Lu, Feng Liu","doi":"10.1007/s11368-024-03794-x","DOIUrl":"https://doi.org/10.1007/s11368-024-03794-x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Aims</h3><p>Soil organic carbon (SOC) storage is mainly governed by inputs from plant and microbial sources. How the relative contributions of these two sources in forest soils vary along broad-scale environmental gradients is poorly understood. The contributions of these two carbon sources in different soil layers are also elusive.</p><h3 data-test=\"abstract-sub-heading\">Methods</h3><p>We used amino sugar and lignin phenol as biomarkers to indicate microbial- and plant-derived soil carbon. The concentrations of amino sugar and lignin phenol in topsoil (0–10 cm) and subsoil (30–60 cm) of major forest types along a latitude gradient in China were investigated.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>The concentration of soil amino sugar decreased along the latitude in topsoil, which is mainly controlled by the variations in mean annual temperature and soil nitrogen. The concentration of lignin phenols decreased along latitude in topsoil, mainly controlled by soil carbon/nitrogen ratio. The microbial-derived carbon was mainly composed of fungi-derived in topsoil, while bacteria-derived dominated in subsoil. Climate and soil properties are primary factors controlling the persistence of microbial residues and lignin phenols in topsoil, and soil clay is the crucial factor in the subsoil.</p><h3 data-test=\"abstract-sub-heading\">Conclusions</h3><p>Both microbial residuals and lignin phenols in topsoil showed a decreasing trend with increasing latitude, but controlled by different sets of environmental factors. Subsoil microbial residues and lignin phenols showed no trend along the latitude and are mainly influenced by soil clay content.These findings provide new insights on how climate and vegetation affect soil carbon persistence, revealing significant distribution patterns of forest soil microbial residuals and lignin phenols along a latitude gradient.</p>","PeriodicalId":17139,"journal":{"name":"Journal of Soils and Sediments","volume":"46 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140882734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Effects of magnesium-modified biochar on soil nitrogen leaching and growth of Chinese cabbage 镁改性生物炭对土壤氮沥滤和大白菜生长的影响
IF 3.6 3区 农林科学 Q3 ENVIRONMENTAL SCIENCES Pub Date : 2024-05-01 DOI: 10.1007/s11368-024-03793-y
Yongchun Zhou, Zhimin Chen, Zili Zhao, Liulin Wu, Yapeng Wang, Jinrong Yang, Ning An, Hang Jing

Purpose

The overuse of nitrogen fertilizers, most commonly urea, is ultimately having a serious impact on the environment through nitrogen leaching. Biochar addition is considered to be a promising measure for mitigating nitrogen leaching. However, whether biochar has a long-term effect is unclear. Moreover, Mg-modified biochar (Mg-biochar) has more excellent physicochemical and surface properties than original biochar, and it has been widely used in water pollution remediation; however, its effect on soil nitrogen leaching is still uncertain.

Methods

The optimal Mg-biochar was selected by adsorption test. In the subsequent soil column simulation experiment, a total of five treatment groups: nitrogen fertilizer (CK), nitrogen fertilizer + fresh biochar (BC), nitrogen fertilizer + Mg-biochar (MGBC), nitrogen fertilizer + freeze-thaw aged biochar (DBC), and nitrogen fertilizer + freeze-thaw aging Mg-biochar (DMGBC) were set up to explore the distribution of nitrogen in the soil-leaching solution-plant system.

Results

In this study, biochar modified by 2 mol/L MgCl2 was chosen to be the optimal Mg-biochar. Compared with the CK, BC reduced the soil nitrogen leaching by 16.96% and increased the soil nitrogen content and cabbage nitrogen absorption by 1.65% and 114.19%, respectively. Mg-biochar had higher nitrogen retention ability than original biochar, and after freeze-thaw aging, biochar maintained or even improved nitrogen retention ability.

Conclusion

The biochar addition had good nitrogen retention ability, and Mg-biochar performed better, and they showed long-term effect on mitigating soil nitrogen leaching. Meanwhile, based on the law of conservation of matter, biochar addition also reduced gaseous nitrogen loss.

目的 氮肥(最常见的是尿素)的过度使用最终会通过氮沥滤对环境造成严重影响。添加生物炭被认为是缓解氮沥滤的一种有效措施。然而,生物炭是否具有长期效果尚不清楚。此外,镁改性生物炭(Mg-biochar)比原始生物炭具有更优异的物理化学和表面特性,已被广泛应用于水污染修复,但其对土壤氮淋失的影响仍不确定。在随后的土壤柱模拟实验中,共设置了五个处理组:氮肥组(CK)、氮肥+新鲜生物炭组(BC)、氮肥+镁生物炭组(MGBC)、氮肥+冻融老化生物炭组(DBC)和氮肥+冻融老化镁生物炭组(DMGBC),以探讨氮在土壤淋溶液-植物系统中的分布。结果 本研究选择了经 2 mol/L 氯化镁改性的生物炭作为最佳镁生物炭。与 CK 相比,BC 可减少土壤中氮的淋失 16.96%,并使土壤中氮的含量和白菜对氮的吸收率分别提高了 1.65% 和 114.19%。结论添加生物炭具有良好的保氮能力,其中镁生物炭的保氮能力更强,对缓解土壤氮素淋失具有长效作用。同时,根据物质守恒定律,添加生物炭还能减少气态氮的流失。
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引用次数: 0
Effect of sampling design on characterizing surface soil fingerprinting properties 取样设计对表层土壤指纹特征的影响
IF 3.6 3区 农林科学 Q3 ENVIRONMENTAL SCIENCES Pub Date : 2024-04-29 DOI: 10.1007/s11368-024-03805-x
Maria Alejandra Luna Miño, Alexander J. Koiter, David A. Lobb

Purpose

The characterization of soil properties is an important part of many different types of agri-environmental research including inventory, comparison, and manipulation studies. Sediment source fingerprinting is a method that is increasingly being used to link sediment sources to downstream sediment. Characterization of sediment sources is a key part of this method as it serves as the base to identify and quantify soil properties (fingerprints) that can discriminate between sources. There is currently not a standard approach to characterizing sources and the different approaches to sampling have not been well assessed.

Methods

Grid (n = 49), transect (n = 14), and likely to erode (n = 8) sampling designs were used to characterize the geochemical, colour, grain size distribution, and soil organic matter content at two sites under contrasting land uses (agricultural and forested). The impact of the three sampling designs on characterization of fingerprint properties, the relationship between particle size and organic matter content on fingerprint properties, fingerprint selection, source discrimination, and mixing apportionment results were evaluated using a range of methods including 21 virtual mixtures.

Results

The likely to erode design resulted in a unique fingerprint signature compared to the other two sampling designs. The correlation between particle size and organic matter varied between fingerprint, source, and sampling design. While the number and composition of the fingerprints selected varied between sampling designs there was a strong (100%) discrimination between sources regardless of the sampling approach. The maximum absolute difference between the virtual mixtures and the modeled proportions was 7.7%, 7.8%, and 8.9% for the grid, transect, and likely to erode sampling designs, respectively.

Conclusions

The likely to erode sampling design was not representative of the upslope areas as characterized by the grid and transect methods. Despite these differences the final apportionment results using virtual mixtures were qualitatively similar between the three sampling designs. Continued work at the watershed scale is needed to fully evaluate the importance of source sampling design on the sediment source fingerprinting approach.

目的土壤特性表征是许多不同类型的农业环境研究(包括清查、比较和操作研究)的重要组成部分。沉积物源指纹识别法越来越多地用于将沉积物源与下游沉积物联系起来。沉积物来源的特征描述是该方法的关键部分,因为它是识别和量化可区分来源的土壤特性(指纹)的基础。方法采用网格(n = 49)、横断面(n = 14)和可能侵蚀(n = 8)取样设计来描述两个土地用途截然不同的地点(农业和森林)的地球化学、颜色、粒度分布和土壤有机物含量。采用包括 21 种虚拟混合物在内的一系列方法,评估了三种取样设计对指纹特征的影响、粒度和有机质含量对指纹特征的影响、指纹选择、来源判别和混合分摊结果。粒度与有机物之间的相关性因指纹、来源和取样设计而异。虽然不同取样设计所选指纹的数量和组成各不相同,但无论采用哪种取样方法,都能很好地区分不同来源(100%)。在网格法、横断法和可能侵蚀法取样设计中,虚拟混合物与模型比例之间的最大绝对差异分别为 7.7%、7.8% 和 8.9%。尽管存在这些差异,但使用虚拟混合物得出的最终分配结果在本质上与三种取样设计相似。需要继续在流域范围内开展工作,以全面评估源取样设计对沉积物源指纹识别方法的重要性。
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引用次数: 0
The reduction of nitrogen loss using biochar for soil fertility reservation 利用生物炭减少土壤肥力流失
IF 3.6 3区 农林科学 Q3 ENVIRONMENTAL SCIENCES Pub Date : 2024-04-28 DOI: 10.1007/s11368-024-03803-z
Xiangyu Gao, Jiaqi Yang, Aijie Wang, Wenzong Liu

Purpose

Excessive application of nitrogen fertilizers on farmland widely occurs in China, which has been recognized as one of the main sources of non-point pollution. To reduce the nitrogen loss in agricultural soils, some specific biochar can be introduced to increase the water-holding capacity of soils and to reserve soil nutrition. The effects and mechanisms of biochar application on decreasing nutrient losses after fertilization were systematically evaluated and understood through both pot and field experiments.

Materials and methods

This study was objected to investigate the effects of neutral biochar (NBC, pH 6.6–7.1) and its combination with urease inhibitor (UI) on nitrogen mitigation and reservation in farmland soil, and the interactions among the mixed soils (biochar, nitrogen fertilizer, and soil) under both pot and field experiments.

Results and discussion

The application of straw biochar could reduce the amount of ammonia volatilization in soil. The maximum inhibition of ammonia volatilization loss accounted for 27.67% of fertilizer applications. In field experiments, neutral biochar could reduce the leaching of soil NH4+-N and NO3-N, and this effect was more evident for NO3-N (68 mg/kg) compared to no fertilization in the soil layer 20–40 cm. With the addition of neutral biochar and urease inhibitors, the content of soil total nitrogen increased greatly with 1.70 g/kg.

Conclusion

Neutral biochar from waste agricultural straw and commercial urease inhibitors were applied for nitrogen reservation in pot and field experiments. The application of neutral biochar played a positive role in lower volatile ammonia loss and higher nitrate content compared to urease inhibitor application only. These findings reveal the potential of neutral biochar for the improvement of agricultural soil.

目的 我国农田普遍存在过量施用氮肥的现象,已被公认为非点污染的主要来源之一。为了减少农田土壤中氮素的流失,可以引入一些特定的生物炭来增加土壤的持水能力,储备土壤营养。本研究旨在探讨中性生物炭(NBC,pH 值为 6.6-7.结果与讨论施用秸秆生物炭可以减少土壤中氨的挥发量。对氨挥发损失的最大抑制率占化肥施用量的 27.67%。在田间试验中,中性生物炭可以减少土壤中 NH4+-N 和 NO3-N 的淋失,在 20-40 厘米土层中,与不施肥相比,NO3-N(68 毫克/千克)的淋失效果更明显。添加中性生物炭和脲酶抑制剂后,土壤全氮含量大幅提高,达到 1.70 g/kg。与仅施用脲酶抑制剂相比,施用中性生物炭在降低挥发性氨损失和提高硝酸盐含量方面发挥了积极作用。这些发现揭示了中性生物炭在改良农业土壤方面的潜力。
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引用次数: 0
Cadmium sorption on γ-Al2O3 and goethite in the presence of silicate: insights from XRD and FTIR studies 硅酸盐存在时镉在γ-Al2O3 和网纹石上的吸附:XRD 和 FTIR 研究的启示
IF 3.6 3区 农林科学 Q3 ENVIRONMENTAL SCIENCES Pub Date : 2024-04-26 DOI: 10.1007/s11368-024-03789-8
Na Mi, Min Yang, Xiaohan Wang, Qian Sun, Jianzhou He, Shaopo Deng, Tingting Fan

Purpose

The application of silicon could effectively alleviate Cd contamination in the soil. However, the interaction between silicon and Cd in soils is not well understood. Our research aims to investigate the mechanism of the impact of silicate on the sorption of Cd on metal oxides in soils.

Materials and methods

Sodium silicate and Cd(II) co-sorption on γ-Al2O3 and goethite at pH 5.5 and 7.5 was studied using a combination of batch sorption experiments, X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR).

Results and discussion

Silicate enhanced the sorption of Cd(II) onto γ-Al2O3 at pH 5.5 and 7.5. However, the sorption of Cd(II) on goethite at pH 5.5 and 7.5 was only promoted when the silicate concentration reached 1 mmol L−1. Cadmium(II) enhanced silicate sorption on γ-Al2O3 at pH 5.5 and on goethite at pH 7.5, while it decreased silicate sorption on γ-Al2O3 at pH 7.5 and had no significant effect on goethite at pH 5.5. At pH 5.5, Cd(II) reacted with silicate to generate Cd2SiO4, and Cd-Si-Al ternary complexes were formed on γ-Al2O3. At pH 7.5, silicate promoted the formation of Cd(OH)2 on γ-Al2O3, which ultimately transformed into CdCO3. When silicate concentration reached 1 mmol L−1, more silicate complexes were formed through the Fe-O-Si bound on goethite at both pH 5.5 and 7.5 to promote the adsorption of Cd(II) owing to its electronegative functional group on the surface of the complex.

Conclusions

The type of clay minerals, pH, and the presence of silicate all significantly affected Cd sorption. Furthermore, the sorption mechanism of Cd on γ-Al2O3 and goethite in the presence of silicate has been elucidated. The above findings improve our understanding of the mechanism for immobilizing Cd in soils using silicon-containing materials.

目的 施用硅可以有效缓解土壤中的镉污染。然而,人们对土壤中硅与镉之间的相互作用还不甚了解。我们的研究旨在探讨硅酸盐对土壤中金属氧化物上 Cd 吸附的影响机制。结果与讨论硅酸钠增强了镉(II)在 pH 值为 5.5 和 7.5 的 γ-Al2O3 上的吸附。然而,在 pH 值为 5.5 和 7.5 时,只有当硅酸盐浓度达到 1 mmol L-1 时才会促进镉(II)在鹅卵石上的吸附。镉(II)增强了 pH 值为 5.5 时γ-Al2O3 和 pH 值为 7.5 时鹅卵石对硅酸盐的吸附,而降低了 pH 值为 7.5 时γ-Al2O3 对硅酸盐的吸附,对 pH 值为 5.5 的鹅卵石没有显著影响。在 pH 值为 5.5 时,镉(II)与硅酸盐反应生成 Cd2SiO4,并在γ-Al2O3 上形成镉-硅-铝三元复合物。在 pH 值为 7.5 时,硅酸盐促进 Cd(OH)2 在 γ-Al2O3 上形成,并最终转化为 CdCO3。当硅酸盐浓度达到 1 mmol L-1 时,在 pH 值为 5.5 和 7.5 的条件下,更多的硅酸盐络合物通过 Fe-O-Si 结合在鹅绿泥石上形成,由于络合物表面的电负性官能团促进了 Cd(II) 的吸附。此外,还阐明了硅酸盐存在时 Cd 在 γ-Al2O3 和鹅膏石上的吸附机理。上述发现加深了我们对利用含硅材料固定土壤中镉的机理的理解。
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引用次数: 0
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Journal of Soils and Sediments
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