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Cover crops potentially enhance soil organic carbon sequestration to offset greenhouse gas emissions without yield penalty towards net-zero rice agriculture 覆盖作物可能会增强土壤有机碳固存,以抵消温室气体排放,而不会对净零水稻农业产生产量损失
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2025-12-20 DOI: 10.1016/j.agee.2025.110186
Ruitao Lou , Yong Li , Zhenghan Li , Zhifeng Xu , Yu Tang , Xiangping Jin , Junzeng Xu , Yawei Li , Yong He , Qianjing Jiang
Cover cropping is a promising strategy in sustainable rice agriculture, yet its broader adoption remains limited due to uncertainties regarding its environmental impacts and potential yield trade-offs. In this study, we synthesized 1539 paired observations from 135 peer-reviewed publications to assess the effects of cover crop application on soil methane (CH4) and nitrous oxide (N2O) emissions, soil organic carbon (SOC) changes, and rice yield in paddy fields. Our findings showed that cover crop application significantly increased CH4 emissions (by 89.3–132.3 %), N2O emissions (by 16.3–64.6 %), while enhancing SOC sequestration (by 5.1–7.3 %), and rice yield (by 6.3–18.8 %). Despite the rise in GHG emissions, cover cropping reduced net global warming potential by 30.6 % and its index by 44.6 % compared to conventional mineral fertilization, but these reductions were not statistically significant. Notably, rice production could potentially achieve net-zero emissions when the N substitution ratio from cover crops remains below 26 %. Among various moderators, water management was identified as the dominant moderator of CH4 emissions, with mid-season drainage shown to effectively reduce CH4 emissions. N2O emissions were positively correlated with initial soil C:N ratio, while SOC sequestration and rice yield responded strongly to initial soil pH, with optimal pH values around 6.3 and 5.9, respectively. Leguminous cover crops were identified as effective options to enhance food security while mitigating climate change. Overall, cover cropping represents an effective path towards sustainable agriculture, but the optimal management strategies must be tailored to local environmental conditions and the interactions among various agronomic management practices.
覆盖种植在可持续水稻农业中是一种很有前途的策略,但由于其环境影响和潜在产量权衡的不确定性,其广泛采用仍然受到限制。本研究综合了135篇同行评议出版物中的1539个配对观测值,评估了覆盖作物对稻田土壤甲烷(CH4)和氧化亚氮(N2O)排放、土壤有机碳(SOC)变化和水稻产量的影响。研究结果表明,覆盖作物显著增加了CH4排放(89.3-132.3 %)、N2O排放(16.3-64.6 %),同时提高了有机碳固碳(5.1-7.3 %)和水稻产量(6.3-18.8 %)。尽管温室气体排放量增加,但与常规矿物施肥相比,覆盖种植使全球净变暖潜势降低了30.6% %,其指数降低了44.6% %,但这些降低在统计学上并不显著。值得注意的是,当覆盖作物的氮替代率保持在26% %以下时,水稻生产可能实现净零排放。在各种调节因子中,水管理被确定为CH4排放的主要调节因子,季中排水显示出有效减少CH4排放。N2O排放量与初始土壤C:N比呈正相关,而有机碳固存和水稻产量对初始土壤pH值响应强烈,pH值分别在6.3和5.9左右为最佳。豆类覆盖作物被确定为在缓解气候变化的同时加强粮食安全的有效选择。总体而言,覆盖种植是实现可持续农业的有效途径,但最佳管理策略必须根据当地环境条件和各种农艺管理实践之间的相互作用进行调整。
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引用次数: 0
Plant litter as a cornerstone of grassland ecosystem services 植物凋落物作为草地生态系统服务的基石
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2025-12-19 DOI: 10.1016/j.agee.2025.110171
Justin R. Clarke , Torre J. Hovick , Benjamin Geaumont , Jason P. Harmon , Kevin Sedivec
Grasslands cover more than one-third of the world’s terrestrial surface and provide many important ecosystem services, and yet, are one of the least protected biomes. Threats include land-use conversion, woody plant encroachment, and invasive species which alter or limit many of the ecosystem services grasslands provide. Despite their significance, the conservation of grasslands remains a pressing challenge. The lack of protection for grassland ecosystems creates a need for targeted conservation and informed management on extant grasslands. As part of this effort, we discuss the role of herbaceous litter in promoting ecosystem function and providing ecosystem services. In this paper, we highlight both the positive and negative effects of litter and 1) summarize the multitude of ecosystem services it affects, 2) outline the environmental factors that influence litter accumulation and quality, and 3) discuss management practices that promote variable litter. Litter contributes to all ecosystem service categories defined by the Millennium Ecosystem Assessment including provisioning, cultural, regulating, and supporting services. While many of these services are indirect, such as improving livestock forage production through increased water infiltration and nutrient cycling, the cascading accumulation of these effects shape grassland ecosystems and should be a critical part of management decisions. Therefore, we emphasize the importance of litter management to improve grassland quality and enhance ecosystem function. While many of the drivers of litter accumulation are inherently difficult to alter, management practices aimed at achieving heterogeneity can restore diverse landscapes that enhance ecosystem services and agronomic benefits.
草原覆盖了世界陆地面积的三分之一以上,提供了许多重要的生态系统服务,但却是保护最少的生物群落之一。威胁包括土地利用转换、木本植物入侵以及改变或限制草原提供的许多生态系统服务的入侵物种。尽管草原具有重要意义,但保护草原仍然是一项紧迫的挑战。由于缺乏对草原生态系统的保护,需要对现有草原进行有针对性的保护和知情管理。为此,我们讨论了草本凋落物在促进生态系统功能和提供生态系统服务方面的作用。在本文中,我们强调了凋落物的积极和消极影响,1)总结了它所影响的众多生态系统服务,2)概述了影响凋落物积累和质量的环境因素,3)讨论了促进可变凋落物的管理实践。废弃物对千年生态系统评估定义的所有生态系统服务类别都有贡献,包括供应、文化、调节和支持服务。虽然其中许多服务是间接的,例如通过增加水分渗透和养分循环来提高牲畜饲料产量,但这些效应的级联积累形成了草地生态系统,应成为管理决策的关键部分。因此,我们强调凋落物管理对改善草地质量和增强生态系统功能的重要性。虽然凋落物积累的许多驱动因素本身就难以改变,但旨在实现异质性的管理做法可以恢复多样化的景观,从而增强生态系统服务和农艺效益。
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引用次数: 0
Yi-ethnic enclosure walls as indigenous innovation for mitigating phosphorus loss in sloping croplands of the Anning River Basin, SW China 安宁河流域坡地彝族围墙的自主创新缓解了磷流失
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2025-12-19 DOI: 10.1016/j.agee.2025.110181
Qiankun Dai , Haiqing Yang , Jun Luo , Shaojun Tan , Nana Wang , Xinxiao Yu , Yuan Su , Lei Wang , Bin Zhang
Soil phosphorus (P) in sloping croplands of mountainous areas is highly susceptible to migration and loss through erosion, posing a major challenge to sustainable agriculture development. Although soil and water conservation measures can mitigate P loss, their interception effects differ greatly. Enclosure walls (EWs), a traditional ethnic soil and water conservation practice in Southwest China, were examined to determine their effectiveness in reducing P loss and the mechanisms underlying P redistribution. The research was conducted in the Anning River Basin, where soil samples were collected from different slope positions (upper and lower slope positions) and depths (0–10 cm, 10–20 cm and 20–40 cm). Total phosphorus (Pt), organic phosphorus (Po) and inorganic phosphorus (Pi), along with key soil properties, were assessed to explore the relationship between terrain and phosphorus migration, and to identify the main driving factors. The results showed that in sloping croplands with EWs, soil Pt, Po, and Pi exhibited significant differences between slope positions, with consistently higher concentrations at the lower slope position. In the 0–10, 10–20, and 20–40 cm soil layers, Pt increased by 45.28 %, 64.10 %, and 69.70 %; Po by 35.71 %, 33.33 %, and 30.43 %; and Pi by 56 %, 120 %, and 188.89 %, respectively. In contrast, the control plots without EWs (CK) showed no significant slope position differences, with smaller increases in Pt (12.5 %, 13.79 %, and 29.55 %), Po (-11.11 %, 0.66 %, and 20.69 %), and Pi (37.93 %, 36.36 %, and 46.67 %). The sloping croplands with EWs and CK showed the highest P content in the surface layer at the upper slope position, but at the lower slope position, only sloping croplands with EWs maintained this pattern, while CK displayed no clear depth gradient and even exhibited the lowest Po content in the surface layer. Slope and slope length were significantly correlated with phosphorus content. Soil chemical properties were identified as the dominated drivers of P migration, with TN explaining 32.39 % of Pt variation, SOC: TN explaining 32.64 % of Po, and SOC: TN explaining 24.96 % of Pi. In contrast, individual environmental factors contributed less than 15 % to the explained variance. EWs significantly reduced the risk of P loss through physical interception, and C–N coupling mechanisms controlled the spatial differentiation of P. These findings provide scientific support for promoting low-cost P-control strategies and indigenous soil and water conservation technologies in the sloping croplands of Southwest China.
山区坡耕地土壤磷极易因侵蚀而迁移和流失,对农业可持续发展构成重大挑战。水土保持措施虽能减轻磷的流失,但截留效果差异较大。以西南地区传统的民族水土保持方式“围墙”(EWs)为研究对象,探讨其减少磷流失的有效性和磷再分配机制。研究在安宁河流域进行,在不同坡位(上坡位和下坡位)和深度(0-10 cm、10-20 cm和20-40 cm)采集土壤样品。通过对全磷(Pt)、有机磷(Po)和无机磷(Pi)以及关键土壤性质的评价,探讨了地形与磷迁移的关系,并确定了主要驱动因素。结果表明:坡耕地土壤Pt、Po、Pi在坡位之间存在显著差异,坡位越低,含量越高;在0 ~ 10、10 ~ 20和20 ~ 40 cm土层,Pt分别增加45.28 %、64.10 %和69.70 %;Po分别为35.71 %、33.33 %和30.43 %;和Pi分别提高56 %、120 %和188.89 %。相比之下,控制阴谋没有EWs (CK)显示没有明显的斜坡位置差异,增加较小的Pt(12.5 %, % 13.79,和29.55 %),阿宝(-11.11 %, % 0.66,和20.69 %),和π(37.93 %, % 36.36,和46.67 %)。施用EWs和CK的坡耕地在坡上位置的表层磷含量最高,但在坡下位置,只有施用EWs的坡耕地保持这种模式,而CK没有明显的深度梯度,甚至表层Po含量最低。坡度和坡长与磷含量呈极显著相关。土壤化学性质是磷迁移的主要驱动因素,TN对Pt、SOC: TN和SOC: TN分别解释32.39% %、32.64% %和24.96% %的磷迁移。相比之下,个体环境因素对解释方差的贡献小于15% %。生态系统通过物理截留显著降低了磷的损失风险,碳氮耦合机制控制了磷的空间分异。这些研究结果为在西南坡耕地推广低成本控磷策略和土着水土保持技术提供了科学支持。
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引用次数: 0
Livestock grazing as a nature-based solution for restoring soil nematode communities and ecosystem multifunctionality 放牧作为恢复土壤线虫群落和生态系统多功能的自然解决方案
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2025-12-18 DOI: 10.1016/j.agee.2025.110168
Jingjing Yang , Zhanbo Yang , Jiayi Wang , Xuefeng Wu , Yueqing Song , Ruan Hang , Tongtong Xu , Xuan Zhao , Duofeng Pan , Deli Wang , Donghui Wu , Yahya Kooch
Grasslands globally are facing increasing degradation, which threatens soil biology and ecosystem multifunctionality. Although it is commonly believed that livestock grazing could harm ecosystem functions in degraded grasslands, the specific mechanisms and consequences of these impacts remain poorly understood. To address this gap, the study used a 3-year field-manipulated livestock grazing experiment (sheep; Ovis aries) across different degraded degrees (i.e., lightly, moderately and severely) of meadow grasslands in China due to overgrazing over the past several decades. Grazing significantly increased the abundance of total nematodes (95 %), bacterivores (120 %), fungivores (200 %), the weighted ecosystem multifunctionality by 144 % in lightly degraded grasslands. In moderately degraded grasslands, grazing boosted the abundance of fungivores and omnivore-predators, Shannon-Wiener diversity of soil nematodes, plant nitrogen content (18 %) and soil available phosphorus (120 %), with no change in multifunctionality. In contrast, grazing decreased soil nematode abundance and metabolic footprints (structural: 31 % and functional: 28 %), ecosystem multifunctionality by 262 % in severely degraded grasslands, but facilitated soil nematode diversity and nitrogen content (11 %). The study provides decision makers with grazing strategies based on the intensity of grassland degradation. Herbivore grazing could be considered as nature-based solutions to improve and maintain soil nematode communities and ecosystem multifunctionality in lightly and moderately degraded grasslands, whereas it is not recommended for severely degraded grasslands. The strategies developed in this work provide valuable insights into the trade-offs between the use and restoration of grasslands to achieve environmental and economic win-win situations.
全球草地退化日益严重,威胁着土壤生物学和生态系统的多功能性。尽管人们普遍认为放牧牲畜会损害退化草原的生态系统功能,但对这些影响的具体机制和后果仍知之甚少。为了解决这一差距,本研究在过去几十年由于过度放牧而导致的不同退化程度(即轻度、中度和严重)的中国草甸草原上进行了为期3年的野外操纵家畜放牧实验(羊、羊)。放牧显著提高了轻度退化草地线虫、细菌和真菌的总丰度(95 %)、细菌和真菌的总丰度(120 %)和加权生态系统多功能性(144 %)。在中度退化草原,放牧增加了食真菌动物和杂食性捕食动物的丰度、土壤线虫的Shannon-Wiener多样性、植物氮含量(18 %)和土壤有效磷(120 %),但多功能性没有变化。相比之下,放牧减少了严重退化草地土壤线虫丰度和代谢足迹(结构:31% %,功能:28% %),生态系统多功能性降低了262 %,但促进了土壤线虫多样性和氮含量(11 %)。该研究为决策者提供了基于草地退化强度的放牧策略。在轻度和中度退化草原,草食放牧是改善和维持土壤线虫群落和生态系统多功能性的自然解决方案,而在严重退化草原,不建议采用草食放牧。在这项工作中制定的策略为草原的利用和恢复之间的权衡提供了有价值的见解,以实现环境和经济的双赢。
{"title":"Livestock grazing as a nature-based solution for restoring soil nematode communities and ecosystem multifunctionality","authors":"Jingjing Yang ,&nbsp;Zhanbo Yang ,&nbsp;Jiayi Wang ,&nbsp;Xuefeng Wu ,&nbsp;Yueqing Song ,&nbsp;Ruan Hang ,&nbsp;Tongtong Xu ,&nbsp;Xuan Zhao ,&nbsp;Duofeng Pan ,&nbsp;Deli Wang ,&nbsp;Donghui Wu ,&nbsp;Yahya Kooch","doi":"10.1016/j.agee.2025.110168","DOIUrl":"10.1016/j.agee.2025.110168","url":null,"abstract":"<div><div>Grasslands globally are facing increasing degradation, which threatens soil biology and ecosystem multifunctionality. Although it is commonly believed that livestock grazing could harm ecosystem functions in degraded grasslands, the specific mechanisms and consequences of these impacts remain poorly understood. To address this gap, the study used a 3-year field-manipulated livestock grazing experiment (sheep; <em>Ovis aries</em>) across different degraded degrees (i.e., lightly, moderately and severely) of meadow grasslands in China due to overgrazing over the past several decades. Grazing significantly increased the abundance of total nematodes (95 %), bacterivores (120 %), fungivores (200 %), the weighted ecosystem multifunctionality by 144 % in lightly degraded grasslands. In moderately degraded grasslands, grazing boosted the abundance of fungivores and omnivore-predators, Shannon-Wiener diversity of soil nematodes, plant nitrogen content (18 %) and soil available phosphorus (120 %), with no change in multifunctionality. In contrast, grazing decreased soil nematode abundance and metabolic footprints (structural: 31 % and functional: 28 %), ecosystem multifunctionality by 262 % in severely degraded grasslands, but facilitated soil nematode diversity and nitrogen content (11 %). The study provides decision makers with grazing strategies based on the intensity of grassland degradation. Herbivore grazing could be considered as nature-based solutions to improve and maintain soil nematode communities and ecosystem multifunctionality in lightly and moderately degraded grasslands, whereas it is not recommended for severely degraded grasslands. The strategies developed in this work provide valuable insights into the trade-offs between the use and restoration of grasslands to achieve environmental and economic win-win situations.</div></div>","PeriodicalId":7512,"journal":{"name":"Agriculture, Ecosystems & Environment","volume":"399 ","pages":"Article 110168"},"PeriodicalIF":6.4,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Bee – Plant networks in agricultural landscapes are enhanced by increased landscape diversity and agri-environmental measures 农业景观中的蜜蜂-植物网络通过增加景观多样性和农业环境措施得到加强
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2025-12-18 DOI: 10.1016/j.agee.2025.110163
Sophie Kratschmer , Esther Ockermüller , Victor S. Scharnhorst , Johann Neumayer , Kathrin Pascher , Christa Hainz-Renezeder , Norbert Sauberer , Thomas Frank , Bärbel Pachinger
Wild bees are among the most important insect pollinators, but their abundance and species richness are declining due to various interacting factors. Many of them are related to land-use change and agricultural intensification. Agri-environmental measures to promote (wild) bee species richness and abundance in agro-ecosystems, aim to support organic farming practices, landscape diversity and floral resources. Analyses of bee-plant network characteristics allow a more in-depth assessment of the effectiveness of agri-environmental measures.
In the present study we assess the network diversity, specialization and niche overlap of bees in bee-plant networks in a central European farmland in comparison to landscape diversity, organic farming and floral resources. Networks were surveyed in 100 test areas (625 ×625 m) on 10 randomly chosen transect-crosses per test area. Landscape diversity was assessed by habitat mapping and subsequent calculation of the Shannon Landscape Diversity Index (LSDI) and the proportion of semi-natural habitats (SNH) per test area. The proportion of organic farming and of biodiversity areas according to the Austrian agri-environmental scheme (2015–2022) per test area were calculated to assess their efficiency for network metrics. Forage availability was studied by average flower cover estimated in categories and plant richness was documented per test area. Finally, 28 test areas, with sufficient interaction data to calculate reliable network metrics, were used for detailed statistical analysis.
While niche overlap of bees was not significantly related to any of our explanatory variables, network diversity was significantly enhanced by increasing LSDI, proportions of SNH and biodiversity areas. Network specialization showed a trend to benefit from increased proportions of organic farming, but network metrics were not related to flower cover. The results suggest that increasing flower cover is not sufficient to accomplish niche complementarity of bee-plant networks. We highlight the utmost importance of high landscape complexity to maintain resilient bee communities and ultimately increase biodiversity in agro-ecosystems.
野生蜜蜂是最重要的昆虫传粉者之一,但由于各种相互作用的因素,它们的丰度和物种丰富度正在下降。其中许多与土地利用变化和农业集约化有关。促进(野生)蜜蜂物种丰富度和农业生态系统丰度的农业环境措施,旨在支持有机耕作方式、景观多样性和花卉资源。对蜂-植物网络特征的分析可以更深入地评估农业环境措施的有效性。在本研究中,我们评估了中欧农田蜜蜂-植物网络中蜜蜂的网络多样性、专业化和生态位重叠,并与景观多样性、有机农业和花卉资源进行了比较。在100个测试区域(625 ×625 m)中,在每个测试区域随机选择10个横断面进行网络调查。通过生境填图,计算香农景观多样性指数(LSDI)和每个试验区的半自然生境比例(SNH)来评价景观多样性。根据奥地利农业环境计划(2015-2022),计算每个试验区的有机农业和生物多样性地区的比例,以评估其网络指标的效率。利用平均花盖度估算牧草可利用性,并记录每个试验区的植物丰富度。最后,利用28个有足够交互数据计算可靠网络指标的试验区进行详细的统计分析。蜜蜂的生态位重叠与我们的解释变量均无显著相关,但随着LSDI、SNH比例和生物多样性面积的增加,网络多样性显著增强。网络专业化表现出受益于有机农业比例增加的趋势,但网络指标与花卉覆盖无关。结果表明,增加花覆盖不足以实现蜜蜂-植物网络的生态位互补。我们强调高度景观复杂性对于维持蜜蜂群落的弹性和最终增加农业生态系统的生物多样性至关重要。
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引用次数: 0
Restoring aquaculture ponds to coastal wetlands using native vegetation reduces methane (CH4) production and emissions 利用原生植被将水产养殖池塘恢复为沿海湿地可减少甲烷(CH4)的产生和排放
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2025-12-17 DOI: 10.1016/j.agee.2025.110177
Wenjing Liu , Hong Yang , Ping Yang , Qitao Xiao , Jujuan Gao , Lihua Wang , Chuan Tong , Yingzi Wang , Pingping Guo , Dongyao Sun , Yongxin Lin , Kam W. Tang
Many coastal marshes dominated by the invasive species, for example, Spartina alterniflora, had been cleared to create aquaculture ponds for shrimp farming. Efforts were made in recent years to revert aquaculture ponds to wetlands using the native species Phragmites australis and Cyperus malaccensis. This study quantified the impact of this restoration effort on sediment methane production potential (PCH4) and methane emission (FT-CH4) in southeastern China. The results showed that restoration decreased PCH4 from 30.3 to 23.9 ng CH4 g−1 d−1 and decreased FT-CH4 from 13.9 to 2.8 mg m−2 h−1. The abundance of mcrA gene decreased by 58.6 %, whereas pmoA gene abundance increased by 103.1 % in restored wetlands. Structural equation modeling (SEM) showed that decrease in PCH4 was primarily caused by changes in sediment labile organic carbon and SO42- contents, which led to a decrease in mcrA gene and an increase in pmoA gene. Reconnecting the aquaculture ponds to adjacent coastal area improved seawater exchange and oxygenation. Compared to the original Spartina-dominated marshes, the restored wetlands had lower methane contribution, above-ground vegetation biomass and organic deposition. Overall, this study showed that active restoration using native vegetation is preferred over passive restoration for coastal wetlands.
许多以互花米草等入侵物种为主的沿海沼泽已被清除,以建立养殖对虾的水产养殖池塘。近年来,人们努力将养殖池塘恢复为湿地,利用本地物种芦苇和马六甲莎草。本研究量化了这种恢复努力对中国东南部沉积物甲烷生产潜力(PCH4)和甲烷排放(FT-CH4)的影响。结果表明,恢复使PCH4从30.3降低到23.9 ng CH4 g−1 d−1,FT-CH4从13.9降低到2.8 mg m−2 h−1。恢复湿地中mcrA基因丰度下降58.6% %,而pmoA基因丰度增加103.1 %。结构方程模型(SEM)表明,PCH4的减少主要是由于沉积物中挥发性有机碳和SO42-含量的变化,从而导致mcrA基因减少,pmoA基因增加。将养殖池塘与邻近沿海地区重新连接,改善了海水交换和氧化。与原有的米草属湿地相比,恢复湿地的甲烷贡献、地上植被生物量和有机沉积均较低。总体而言,本研究表明,利用原生植被进行主动恢复比被动恢复更适合滨海湿地。
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引用次数: 0
Linking microbial life strategies to carbon mineralization under diverse tillage practices: Insights from eroding black soil hillslopes 在不同耕作方式下,将微生物生命策略与碳矿化联系起来:来自侵蚀黑土山坡的见解
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2025-12-17 DOI: 10.1016/j.agee.2025.110174
Rui Qian , Lei Gao , Junjie Liu , Asim Biswas , Xinhua Peng
Microbial community structure plays a critical role in regulating soil organic carbon (SOC) mineralization in agricultural systems. However, the interrelationships between microbial life-history strategies and SOC mineralization under different tillage practices in erosion-prone landscapes remain insufficiently understood. This study explored the microbial mechanisms underlying SOC mineralization across three tillage systems, conventional tillage with straw removal (CT), conventional tillage with straw incorporation (CTS), and no-tillage with straw mulch (NTS), on a hillslope in Northeast China's black soil region. Cumulative SOC mineralization (1132.8–3044.5 kg C ha⁻¹) varied significantly with slope positions and tillage practice (p < 0.05), with upper and lower positions exhibiting 50.2 % and 34.5 % higher values than the middle position, respectively. Compared to CT, CTS increased SOC mineralization by 68.5 %. Although NTS also exhibited higher mineralization than CT, it promoted SOC storage as confirmed by positive C balance. Microbial life-history strategies emerged as stronger predictors of SOC mineralization than microbial diversity alone. Bacterial communities displayed distinct shifts in response to erosion and deposition, transitioning from r-strategists in nutrient-rich upper and lower positions to K-strategists in the nutrient-depleted middle area. In contrast, fungal communities responded primarily to tillage practice, with the abundant input of fresh straw favoring r-strategist fungi (e.g., Ascomycota) as key drivers of SOC mineralization and accumulation, rather than K-strategists. Our findings provide mechanistic insights into microbe-mediated C cycling in agricultural systems and support the implementation of conservation tillage practices to enhance SOC sequestration in erosion-vulnerable landscapes.
微生物群落结构对农业系统土壤有机碳矿化具有重要调控作用。然而,在不同耕作方式下,微生物生活史策略与土壤有机碳矿化之间的相互关系尚不清楚。本研究以东北黑土地区为研究对象,探讨了三种耕作方式下土壤有机碳矿化的微生物机制,即常规耕作加秸秆去除(CT)、常规耕作加秸秆还田(CTS)和秸秆覆盖免耕(NTS)。累积有机碳矿化(1132.8-3044.5 kg C ha⁻¹)随坡位和耕作方式的不同而有显著差异(p <; 0.05),上、下位置分别比中间位置高50.2% %和34.5% %。与CT相比,CTS使有机碳矿化提高了68.5 %。虽然NTS也比CT表现出更高的矿化,但正C平衡证实了NTS促进了SOC的储存。微生物生活史策略比微生物多样性本身更能预测有机碳矿化。细菌群落对侵蚀和沉积的响应表现出明显的变化,从营养丰富的上部和下部的r型向营养枯竭的中部地区的k型转变。相比之下,真菌群落主要对耕作方式做出反应,新鲜秸秆的大量输入有利于r-策略真菌(如子囊菌)成为土壤有机碳矿化和积累的关键驱动因素,而不是k -策略真菌。我们的研究结果为农业系统中微生物介导的碳循环提供了机制见解,并支持保护性耕作措施的实施,以增强侵蚀脆弱景观中有机碳的固存。
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引用次数: 0
Low accumulation crop rotations enhance safe yields and cadmium drawdown in severely polluted farmland 低累积量轮作提高了严重污染农田的安全产量和镉的吸收
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2025-12-17 DOI: 10.1016/j.agee.2025.110165
Jianbin Deng , Yusong Dai , Qijun Zhang , Fangjie Shi , Wenyan Li , Jinjin Wang , Jianjun Zhang , Yongtao Li , Xueming Lin , Yulong Zhang
Global cadmium (Cd) contamination threatens 30 % of agricultural lands, forcing unsustainable trade-offs between food safety and farmer livelihoods. This study establishes low accumulation crop (LAC) rotations as an eco-engineering platform that successfully decouples agricultural production from heavy metal pollution in contaminated agroecosystems. Through systematic validation of ten rotation patterns in severely Cd-polluted soils (3.32 mg/kg), we demonstrate how four optimized rotations—Rapeseed-Silage corn-Cherry tomato (CT), Rapeseed-Silage corn-Peanut (PN), Rapeseed-Silage corn-Silage corn (SC), and Rapeseed-Silage corn-Sunflower (SF)—achieve triple synergy: maintaining 100 % crop compliance rates while removing 66.78–91.34 g/ha/yr of Cd and generating 11,664–28,559 USD ha/yr net profits (270 %–590 % above conventional rice systems). Crucially, this framework propels self-sustaining circularity through Cd bio-sequestration in non-edible biomass, soil health restructuring via pH-driven bioavailability suppression (increased 0.59–1.48 units), and microbe-mediated reactivation evidenced by 8.44 %–24.3 % MBC enhancement, 61 %–117 % catalase surge, and 22.44 %–87.19 % urease amplification. By transforming remediation into an economically viable process where safe agricultural outputs fund ongoing contaminant drawdown, the system advances SDG 2 (Zero Hunger) and SDG 3 (Good Health) in subtropical contamination hotspots. This ecology-engineering blueprint offers a transferrable solution for 30 % of global agricultural ecosystems facing heavy metal degradation.
全球30% %的农业用地受到镉污染的威胁,迫使在食品安全和农民生计之间进行不可持续的权衡。本研究建立了低积累作物轮作作为一个生态工程平台,成功地将污染农业生态系统中的农业生产与重金属污染解耦。通过对严重镉污染土壤(3.32 mg/kg)的十种轮作模式进行系统验证,我们展示了四种优化轮作模式——油菜-青贮玉米-樱桃番茄(CT)、油菜-青贮玉米-花生(PN)、油菜-青贮玉米-青贮玉米(SC)和油菜-青贮玉米-向日葵(SF)——如何实现三重协同:保持100% %的作物满足率,同时去除66.78-91.34 g/ha/年的镉,产生11,664-28,559美元/ha/年的净利润(比传统水稻系统高出270 % -590 %)。至关重要的是,该框架通过非食用生物质中的Cd生物封存、ph驱动的生物利用度抑制(增加0.59-1.48个单位)以及微生物介导的再激活(8.44 % -24.3 % MBC增强、61 % -117 %过氧化氢酶激增和22.44 % -87.19 %脲酶扩增)来促进自我维持循环。通过将修复转变为经济上可行的过程,让安全的农业产出为持续减少污染物提供资金,该系统在亚热带污染热点地区推进可持续发展目标2(零饥饿)和可持续发展目标3(良好健康)。这一生态工程蓝图为30% %面临重金属退化的全球农业生态系统提供了可转移的解决方案。
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引用次数: 0
Microbial metabolism decline in degraded grasslands depends on soil organism size 退化草地微生物代谢下降与土壤微生物大小有关
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2025-12-17 DOI: 10.1016/j.agee.2025.110178
Yang Hu , Mengfei Cong , Tianle Kou , Han Yan , Xinya Sun , Haolin Zhang , Yakov Kuzyakov , Yang Yang , Yimei Huang , Yanxing Dou , Zhaolong Zhu , Baorong Wang , Hongtao Jia , Shaoshan An
Soil organisms of various sizes respond variably to environmental changes due to their distinct life-history traits, but their impact on soil organic carbon (SOC) through microbial metabolism remains unclear. Degraded grasslands provide an excellent platform to evaluate the links between specific-size organisms and metabolic efficiency in complex environments. Grassland degradation experiments were established across six sites spanning 2000 km to reveal how 34 taxa of various sizes, bacteria, fungi, protozoa, and nematodes, respond to degradation, and their dependence on microbial metabolic efficiency. Degradation reduced microbial carbon use efficiency (CUE) and necromass accumulation coefficient (NAC) by 9.2–27 % and 19–41 %, respectively, though its extent may be mediated by environmental factors across sites. Organism responses to degradation depended on body size: fungal diversity increased by 15–20 %, whereas large-bodied organisms (nematodes) decreased by 27 %, and bacteria and protozoa remained stable. Increases in soil pH, as well as decreases in plant biomass, soil clay, and nutrients, were associated with the reductions in CUE and NAC. Furthermore, smaller-bodied organisms (e.g., Actinobacteria and Firmicutes within bacteria) explained the reductions in CUE and NAC more than larger-bodied organisms (e.g., nematodes and protozoa). We emphasize that grassland degradation-induced deterioration of plants and soil, as well as changes in smaller-bodied organisms, potentially reduces the efficiency of microbes in converting carbon into biomass and necromass, which may be a key mechanism for SOC loss in degraded grasslands.
不同大小的土壤生物由于其不同的生活史特征,对环境变化的响应不同,但它们通过微生物代谢对土壤有机碳(SOC)的影响尚不清楚。退化草地为评估复杂环境中特定大小的生物与代谢效率之间的联系提供了一个很好的平台。在2000 km的6个地点建立了草地退化实验,揭示了34个不同大小的分类群(细菌、真菌、原生动物和线虫)对退化的响应及其对微生物代谢效率的依赖。降解使微生物碳利用效率(CUE)和坏死块积累系数(NAC)分别降低了9.2-27 %和19-41 %,但其程度可能受环境因子的调节。生物体对降解的反应取决于体型:真菌多样性增加了15 - 20% %,而大型生物体(线虫)减少了27% %,细菌和原生动物保持稳定。土壤pH值的增加以及植物生物量、土壤粘土和养分的减少与CUE和NAC的减少有关。此外,体型较小的生物(如细菌中的放线菌和厚壁菌门)比体型较大的生物(如线虫和原生动物)更能解释CUE和NAC的减少。我们强调,草地退化导致的植物和土壤退化,以及小体生物的变化,可能会降低微生物将碳转化为生物量和坏死物质的效率,这可能是退化草地有机碳损失的关键机制。
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引用次数: 0
Ecological structures and terrestrial insect diversity across successional stages in abandoned paddy fields 撂荒稻田演替阶段的生态结构与陆生昆虫多样性
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2025-12-17 DOI: 10.1016/j.agee.2025.110172
Jaeyeon Kim , Seungwoo Han , Jiweon Yun , Seunghyeon Lee , Youngkeun Song
<div><div>Abandoned paddy fields (APFs) are increasing due to socio-economic changes, but their ecological characteristics across different spatial scales and taxonomic groups remain largely unexplored. Existing studies have primarily focused on single high-value sites or plant communities, limiting our understanding of broader biodiversity patterns and successional stages. This study aims to identify the successional stages of APFs using remote-sensing based ecological indicators and to analyze how these successional stages shape terrestrial insect diversity and community composition. Since APFs exhibit considerable heterogeneity depending on their vegetation structure and moisture conditions, systematic grouping of their successional stages is essential for understanding biodiversity patterns and informing targeted ecological management. The study was conducted in Gyeonggi Province, South Korea, encompassing 2269 sites across approximately 10,171 km², a region where agricultural areas are widely distributed while rapid urbanization is simultaneously occurring. Remote-sensing indices including NDVI, NDWI and Rao’s Q diversity index, calculated from Sentinel-2 imagery, were used in principal component analysis and K-means clustering to delineate successional stages. Field surveys were conducted in May 2024 at nine sites representing three successional types. Terrestrial insects were quantitatively sampled using sweep nets. Diversity indices (Shannon and Dominance) were compared among succession stages using ANOVA and community composition was analyzed using NMDS and PERMANOVA. Based on remote-sensing data, principal component analysis and clustering grouped APFs into three ecological types: Cultivated field, Herbaceous-woody mixed APF and Woody-dominated APF. Significant differences in ecological structure were found among clusters (e.g., PC1: F(2,2266) = 7224, <em>p</em> < 0.001). Second, significant differences in terrestrial insect diversity were observed between some of the three identified successional types. Herbaceous-woody mixed APF exhibited the highest Shannon index (3.38 ± 0.16), while Cultivated field showed the lowest (2.58 ± 0.44, <em>p</em> = 0.02). The Dominance index was lowest in Herbaceous-woody mixed APF (0.17 ± 0.01) and highest in Cultivated field (0.34 ± 0.07, <em>p</em> = 0.01). NMDS and PERMANOVA (<em>R²</em> = 0.49, <em>p</em> = 0.004) revealed distinct insect assemblages among successional stages. Cultivated fields were characterized by a higher abundance of Hemiptera and Orthoptera, including pest-associated species, whereas woody-dominated APFs showed greater occurrence of Lepidoptera and Hymenoptera. Herbaceous-woody mixed APFs were strongly associated with predatory taxa such as Mantodea and Odonata, reflecting structurally diverse and moisture-rich environments. These results confirm the feasibility of using remote-sensing to differentiate ecological structures of APFs and show that successional stages significa
由于社会经济的变化,撂荒稻田数量不断增加,但撂荒稻田在不同空间尺度和分类类群上的生态特征仍未得到充分研究。现有的研究主要集中在单一的高价值地点或植物群落,限制了我们对更广泛的生物多样性模式和演替阶段的理解。本研究旨在利用遥感生态指标确定APFs的演替阶段,并分析这些演替阶段对陆生昆虫多样性和群落组成的影响。由于APFs在植被结构和湿度条件下表现出相当大的异质性,因此系统地分组其演替阶段对于了解生物多样性模式和有针对性的生态管理至关重要。该研究是在韩国京畿道进行的,覆盖了大约10,171 平方公里的2269个地点,这是一个农业地区广泛分布的地区,同时也在快速城市化。利用Sentinel-2遥感影像计算的NDVI、NDWI和Rao’s Q多样性指数,进行主成分分析和k均值聚类,划分演替阶段。2024年5月,在3种演替类型的9个地点进行了实地调查。采用扫网对陆生昆虫进行定量取样。利用方差分析(ANOVA)比较不同演替阶段的Shannon和Dominance多样性指数,利用NMDS和PERMANOVA分析群落组成。基于遥感数据,采用主成分分析和聚类方法,将植被群落划分为3种生态类型:耕地型、草木混合型和以木为主型。集群间生态结构存在显著差异(如PC1: F(2,2266) = 7224,p <; 0.001)。其次,在已确定的3种演替类型中,陆生昆虫多样性存在显著差异。草木混交林香农指数最高(3.38 ± 0.16),耕地最低(2.58 ± 0.44,p = 0.02)。草木混交林优势度指数最低(0.17 ± 0.01),耕地优势度指数最高(0.34 ± 0.07,p = 0.01)。NMDS和PERMANOVA (R²= 0.49,p = 0.004)显示不同演替阶段昆虫组合的差异。耕地中半翅目和直翅目昆虫(包括害虫相关物种)的丰度较高,而以林地为主的apf中鳞翅目和膜翅目昆虫的丰度较高。草木混合APFs与Mantodea和Odonata等掠食性类群密切相关,反映了结构多样性和丰富的环境。这些结果证实了利用遥感技术区分陆生昆虫群落生态结构的可行性,并表明演替阶段对陆生昆虫的生物多样性有显著影响。
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引用次数: 0
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