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Bromus inermis forage production and quality under long-term rotational grazing and nutrient enrichment in Eastern Nebraska, U.S. 美国东部内布拉斯加州长期轮牧及养分富集条件下无毛雀茅牧草产量与品质
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2026-01-12 DOI: 10.1016/j.agee.2026.110216
Hassan Shehab , Makki Khorchani , Anastasios Mazis , Jeremy Hiller , Galen Erickson , Marty Schmer , Brian Wardlow , Andy Suyker , Xiangmin Sun , Lidong Li , Rebecca McDermott , Ariel Freidenreich , Girma Birru , Virginia Jin , Tala Awada
Rising food and feed demand, coupled with climate uncertainties, poses a growing threat to the sustainability and resilience of pasture and agriculture lands in the Great Plains. Smooth bromegrass (Bromus inermis, Lyess), a C3 cool-season grass, dominates cattle grazing pastures in eastern Nebraska and is valued for its productivity and nutritional quality. However, nitrogen fertilization of smooth brome pastures carries nitrate leaching risks, and potential water degradation. Dry Distiller Grains plus Solubles (DDGS), a by-product of corn ethanol production, has emerged as an alternative to mineral fertilization. This study investigated the interactive effects of long-term (2005–2023) pasture management (fertilization and rotational grazing) and climate variability on smooth bromegrass performance over four years (2020–2023). Treatments included mineral nitrogen fertilization, DDGS supplementation, and no fertilization, each under grazed and ungrazed conditions. Biomass (total and live), leaf area index, chlorophyll content, crude protein, acid detergent fiber, neutral detergent fiber, and soil moisture were measured seasonally and across years. Results showed that fertilization consistently produced higher biomass, leaf area index, and crude protein, relative to other treatments, reinforcing its role in sustaining forage productivity. DDGS, while offering a reduced environmental footprint, showed potential in enhancing forage production and quality under average or above average precipitation and soil moisture. However, its efficacy declined during dry years. While long-term fertilization treatment remained the most consistent strategy for sustaining productivity under both ungrazed and rotational grazing systems, DDGS supplementation emerged as a strategic option for regions with adequate growing season precipitation, reducing reliance on mineral fertilizers without compromising yields. These findings emphasize the value of adaptive practices that integrate fertilization and grazing to maintain smooth bromegrass productivity under increasing climate variability.
不断增长的粮食和饲料需求,加上气候的不确定性,对大平原牧场和农业用地的可持续性和复原力构成了越来越大的威胁。黄雀麦(Bromus inermis, Lyess)是C3寒季草,在内布拉斯加州东部的牧牛牧场中占主导地位,因其生产力和营养质量而受到重视。然而,施用氮肥会带来硝态氮淋失的风险,并可能导致水体退化。干酒糟加可溶物(DDGS)是玉米乙醇生产的副产品,已成为矿物施肥的替代品。本研究考察了长期(2005-2023年)牧场管理(施肥和轮牧)和气候变率对4年(2020-2023年)褐雀草生长性能的交互影响。在放牧和未放牧条件下,分别施用矿物氮、添加DDGS和不施肥。测定生物量(总生物量和活生物量)、叶面积指数、叶绿素含量、粗蛋白质、酸性洗涤纤维、中性洗涤纤维和土壤水分。结果表明,相对于其他处理,施肥能持续产生更高的生物量、叶面积指数和粗蛋白质,增强了其维持牧草生产力的作用。DDGS在减少环境足迹的同时,显示出在平均或高于平均降水和土壤湿度条件下提高牧草产量和质量的潜力。然而,在干旱年份,其效力下降。尽管在不放牧和轮牧制度下,长期施肥处理仍然是维持生产力的最一致策略,但在生长季节降水充足的地区,补充DDGS成为一种战略选择,可以在不影响产量的情况下减少对矿物肥料的依赖。这些发现强调了将施肥和放牧结合起来的适应性做法的价值,以在日益增加的气候变化下保持雀麦草的平稳生产力。
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引用次数: 0
Weed control provided by seed predators saves 20 % crop yield in cereal fields 由种子捕食者提供的杂草控制使谷物田的作物产量节省20% %
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2026-01-10 DOI: 10.1016/j.agee.2025.110196
Lucile Muneret , Benjamin Carbonne , Bruno Chauvel , Alexandre Dosset , Chantal Ducourtieux , Nicolas Henon , Emeline Felten , Emilien Laurent , Annick Matejicek , Sandrine Petit
Although many herbicide active substances have been banned, and while weed infestation is a major threat to crop productivity, the extent to which natural weed control provided by seed predators can help farmers manage weed communities remains unknown. The contribution of seed predators to crop productivity through weed control was quantified, and it was assessed whether farming systems such as conservation agriculture played a role in bolstering their impact. A total of 112 seed predator-exclusion cages were set up in 28 cereal fields in France (14 pairs of plots, in which one plot was managed under conservation agriculture and the other under conventional agriculture). Weed emergence and biomass were surveyed, crop yield was measured, and the main seed predators—carabid beetles and rodents—were sampled. A 20 % reduction in yield loss due to weeds was found to be caused by seed predator activity, which was extrapolated to an economic gain of 285 €/ha. However, a whole 60 % of the maximum crop yield potential reached in the absence of weeds remains lost. Moreover, while conservation agriculture enhances weed control, this does not translate into increased crop yield. This study demonstrates the tangible importance of considering seed predators for weed control but highlights the need to combine this approach with other weed control practices or to substantially redesign cropping systems to enhance the beneficial effects of biodiversity on crop productivity.
尽管许多除草剂活性物质已被禁止使用,尽管杂草侵扰是作物生产力的主要威胁,但种子捕食者提供的自然杂草控制能在多大程度上帮助农民管理杂草群落仍不得而知。研究量化了种子捕食者通过杂草控制对作物生产力的贡献,并评估了保护性农业等农业系统是否在增强其影响方面发挥了作用。在法国28块谷物田(14对样地,一个样地采用保护性农业管理,另一个样地采用常规农业管理)共设置了112个种子捕食者隔离笼。调查了杂草的出苗率和生物量,测量了作物产量,并对主要的种子捕食者——瓢虫和啮齿动物进行了取样。研究发现,杂草造成的产量损失减少了20% %,这是由种子捕食者活动造成的,据外推计算,经济收益为285欧元/公顷。然而,在没有杂草的情况下达到的最高作物产量潜力的60% %仍然损失。此外,虽然保护性农业加强了杂草控制,但这并没有转化为作物产量的增加。这项研究证明了考虑种子捕食者对杂草控制的切实重要性,但强调需要将这种方法与其他杂草控制实践相结合,或从根本上重新设计种植制度,以增强生物多样性对作物生产力的有益影响。
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引用次数: 0
Livestock production systems shape alpha and beta diversity of small mammal assemblages 畜牧业生产系统塑造了小型哺乳动物群落的α和β多样性
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2026-01-09 DOI: 10.1016/j.agee.2025.110176
Rodrigo Javier Alonso , Rosario Lovera , Melanie Ruiz , Malena Rospide , Martin Neyen Lammen , Daniela Paula Montes de Oca , Juliana Sánchez , Regino Cavia
Within highly modified environments, livestock production systems shape small mammal assemblages, which are particularly relevant due to their responsiveness to local habitat structure and management practices, and their role as agricultural pests and reservoirs of zoonotic pathogens. This study examines changes in the composition and structure of small mammal assemblages, assessed through taxonomic alpha and beta diversity, across different livestock farming systems, seasons, years, and geographical regions in northeast Buenos Aires province, Argentina. Seasonal sampling was conducted on dairy farms, intensive and extensive pig farms, and feedlots from 2008 to 2021, though not continuously. For alpha and beta diversity comparisons, we used abundance-based diversity indices and multivariate ordination analyses, respectively. A total of 1317 individuals from ten species were captured, with Rattus norvegicus (n = 777) as the dominant species. Multivariate analyses revealed that the composition of small mammal assemblages was influenced by the type of farm and season. Species richness was highest on dairy and intensive pig farms, whereas feedlots exhibited greater evenness with more common and dominant species. Seasonal variations affected diversity patterns, with the highest species richness in fall and winter. The results highlight how different types of farms, seasons and landscape contexts shape small mammal communities, changing abiotic factors and introducing interactions between native and invasive species. These findings underscore the need for tailored small mammal management strategies to mitigate biodiversity loss and zoonotic risks in livestock systems.
在高度改变的环境中,牲畜生产系统塑造了小型哺乳动物的群落,由于它们对当地栖息地结构和管理做法的反应,以及它们作为农业害虫和人畜共患病原体储存库的作用,这些群落尤为重要。本研究通过分类α和β多样性评估了阿根廷布宜诺斯艾利斯省东北部不同畜牧业系统、季节、年份和地理区域的小型哺乳动物组合的组成和结构变化。从2008年到2021年,对奶牛场、集约化和粗放化养猪场和饲养场进行了季节性抽样,但不是连续抽样。对于α和β多样性的比较,我们分别使用了基于丰度的多样性指数和多元排序分析。共捕获褐家鼠10种1317只,褐家鼠( = 777)为优势种。多因素分析表明,小型哺乳动物群落的组成受养殖场类型和季节的影响。物种丰富度在奶牛场和集约化养猪场最高,而饲养场表现出更大的均匀性,常见和优势物种较多。季节变化影响多样性格局,秋季和冬季物种丰富度最高。研究结果强调了不同类型的农场、季节和景观环境如何塑造小型哺乳动物群落,改变非生物因素,并引入本地和入侵物种之间的相互作用。这些发现强调需要制定量身定制的小型哺乳动物管理战略,以减轻牲畜系统中的生物多样性丧失和人畜共患病风险。
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引用次数: 0
Contrasting responses of particulate and mineral-associated organic carbon stocks to grazing exclusion in an alpine meadow 高寒草甸颗粒与矿物相关有机碳储量对放牧排斥的响应对比
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2026-01-09 DOI: 10.1016/j.agee.2026.110227
Jiacong Zhou , Shuo Liu , Kees Jan van Groenigen , Carsten W. Mueller , Raúl Ochoa-Hueso , Nicolas Fanin , Zixuan Ren , Yixuan Zhang , Ying Ma , Siyi Sun , Junxi Hu , Yao Zhang , Laura Yahdjian , Wolfgang Wanek , Jørgen Eivind Olesen , Yakov Kuzyakov , Ji Liu , Ji Chen
Grazing exclusion is widely used as an effective soil restoration strategy in degraded grasslands to enhance soil organic carbon (SOC) stocks. However, the magnitude and direction of the effects of grazing exclusion on SOC remain unclear, due to limited understanding of changes in SOC constituent pools. Here, we investigated the impacts of 6-year (GE6) and 14-year (GE14) grazing exclusion on particulate (POC) and mineral-associated organic carbon (MAOC) stocks in an alpine meadow on the Qinghai-Tibet Plateau. Compared to grazing treatments, GE6 and GE14 reduced POC stocks by 41 % and 68 %, respectively, across the 0–30 cm soil depth. In contrast, GE6 increased MAOC stocks by 49 %, whereas GE14 had no significant effect on MAOC stocks. The decline in POC likely resulted from reduced litter incorporation into soils, together with enhanced decomposition driven by elevated oxidative enzyme activities. Changes in MAOC stocks were linked to increased above- and belowground plant biomass, which promoted microbial necromass C production. However, the absence of MAOC gains under GE14 limited overall SOC accumulation, underscoring the need to optimize grazing exclusion duration. Collectively, these results show that the responses of SOC stocks to grazing exclusion depend largely on microbial transformation of plant-derived C rather than on increased plant biomass alone, highlighting the pivotal role of microbes in regulating SOC sequestration in alpine grasslands.
禁牧是退化草地土壤恢复中提高土壤有机碳储量的有效措施。然而,由于对有机碳组成库变化的了解有限,放牧对有机碳影响的幅度和方向尚不清楚。研究了6年(GE6)和14年(GE14)禁牧对青藏高原高寒草甸颗粒(POC)和矿物相关有机碳(MAOC)储量的影响。与放牧处理相比,GE6和GE14在0 ~ 30 cm土壤深度上分别减少了41 %和68 %的POC储量。GE6可使MAOC库存量增加49 %,而GE14对MAOC库存量无显著影响。POC的下降可能是由于凋落物进入土壤的减少,以及氧化酶活性升高导致的分解增强。MAOC储量的变化与地上和地下植物生物量的增加有关,这促进了微生物坏死物C的产生。然而,在GE14条件下,MAOC没有增加,限制了土壤有机碳的总体积累,因此需要优化不放牧持续时间。综上所述,这些结果表明,有机碳储量对放牧排斥的响应主要依赖于微生物对植物源碳的转化,而不仅仅是植物生物量的增加,这突出了微生物在调节高寒草地有机碳封存中的关键作用。
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引用次数: 0
Leaf and root traits codetermine biomass production and allocation patterns in agriculturally managed wetlands in a semi-arid region 叶和根性状共同决定了半干旱区农业管理湿地的生物量生产和分配模式
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2026-01-08 DOI: 10.1016/j.agee.2026.110229
Xiaofei Wang , Yu An , Le Wang , Mingye Zhang , Xianglong Xing , Shouzheng Tong , Haitao Wu
In semi-arid regions, wetlands are increasingly converted to agriculture use due to growing food demand. Current practices like mowing and grazing considerably alter plant biomass allocation patterns, yet the underlying functional mechanisms remain unclear. To clarify this, we combine community-level leaf and root traits with biomass partitioning analysis across a management gradient (from natural to heavily grazed wetlands) in China's Songnen Plain. Results revealed that agricultural intensification triggered strategic biomass reallocation: aboveground biomass (AGB) and belowground biomass (BGB) decreased 83.1 % and 51.9 % from natural wetlands (NW, 1093.5 g m⁻²) to heavily grazed sites (HG), while root-to-shoot ratio (RSR) increased 12-fold (HG:3.6 vs. NW:0.3). This coincided with the coordinated leaf-root economic strategies: NW favored acquisitive strategies (e.g. peak high leaf area [LA] =1917.1 mm², and specific root length [SRL] = 3219.3 cm g⁻¹), whereas mowed/grazed sites optimized conservation investments (e.g. peak leaf carbon concentration [LCC] = 487.4 g kg⁻¹, and root carbon concentration [RCC] = 391.0 g kg⁻¹), illustrating a functional shift from resource acquisition to conservation. Correlation analysis and stepwise regression identified leaf dry weight (LDW), leaf carbon-to-nitrogen ratio, leaf phosphorus concentration, LA, LCC, root length, specific root area (SRA), RCC, and root surface area (RSA) as key predictors for AGB, whereas BGB was predicted by LCC, LDW and leaf nitrogen-to-phosphorus ratio, RSA, SRA and root phosphorus concentration (RPC). Leaf traits (LA and LDW) and root traits (RCC, RPC, and SRL) were identified as the best predictors of RSR. Variance partitioning analysis showed that leaf-root trait interactions dominated biomass production and allocation (76.9 %-89.8 % of explained variance), underscoring an integrated root-leaf economic network. Structural equation modeling further revealed that the decreased LA indirectly enhanced RSR through positive effects on AGB and synergistic interactions with LDW, SRL and RCC. Contrasting effects of LA-LDW/SRL interactions on BGB further regulated RSR. LA-driven synergies with SRL and trade-offs between RCC and SRL directly modulated RSR. These results collectively demonstrate that trait interaction networks, rather than individual traits, serve as the key driver of biomass production and allocation in agriculturally managed wetlands. This functional trait-coordination framework advances our understanding of plant strategies for enhancing wetland resilience in semi-arid agricultural landscape.
在半干旱地区,由于粮食需求的增长,湿地越来越多地转变为农业用途。目前的做法,如割草和放牧显著改变了植物生物量分配模式,但潜在的功能机制尚不清楚。为了澄清这一点,我们将群落水平的叶片和根系特征与生物量分配分析结合起来,分析了中国松嫩平原不同管理梯度(从自然湿地到重度放牧湿地)的生物量分配。结果显示,农业集约化触发战略生物质重新分配:地上部生物量(AGB)和地下的生物量(BGB)减少83.1 % 51.9 %从自然湿地(NW, 1093.5 g m⁻²)严重擦伤了网站(HG),而root-to-shoot比率(RSR)增加了12倍(HG: 3.6与NW: 0.3)。这与叶根协调的经济策略相吻合:西北地区倾向于获取策略(例如,峰值高叶面积[LA] =1917.1 mm²,比根长度[SRL] = 3219.3 cm g⁻¹),而刈/放牧地则优化了保护投资(例如,峰值叶碳浓度[LCC] = 487.4 g kg⁻¹,根碳浓度[RCC] = 391.0 g kg⁻¹),说明了从资源获取到保护的功能转变。相关分析和逐步回归表明,叶片干重(LDW)、叶片碳氮比、叶片磷浓度、LA、LCC、根长、比根面积(SRA)、比根面积(RCC)和根表面积(RSA)是AGB的关键预测因子,而BGB则由LCC、LDW和叶片氮磷比、RSA、SRA和根磷浓度(RPC)预测。叶片性状(LA和LDW)和根系性状(RCC、RPC和SRL)是RSR的最佳预测因子。方差划分分析表明,叶片-根系性状互作主导了生物量生产和分配(占解释方差的76.9% % ~ 89.8% %),表明根系-叶片经济网络是一体化的。结构方程模型进一步表明,LA的降低通过对AGB的正向作用以及与LDW、SRL和RCC的协同作用间接提高了RSR。LA-LDW/SRL互作对BGB的影响比较进一步调控了RSR。la驱动的与SRL的协同作用以及RCC和SRL之间的权衡直接调制了RSR。这些结果共同表明,性状相互作用网络,而不是单个性状,是农业管理湿地生物量生产和分配的关键驱动因素。这种功能性状-协调框架促进了我们对半干旱农业景观中增强湿地恢复力的植物策略的理解。
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引用次数: 0
The Bambi effect: Leveraging public sentiment on roe deer fawn rescue for broader conservation effort 小鹿斑比效应:利用公众对营救小鹿的情绪来进行更广泛的保护工作
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2026-01-08 DOI: 10.1016/j.agee.2026.110228
Jan Cukor
Conventional agricultural practices, especially the rapid harvesting of meadows, pose a serious threat to wildlife. Roe deer (Capreolus capreolus L.) fawns are particularly vulnerable, as their survival strategy is to stay hidden in tall vegetation without movement to avoid predators. In Central Europe, the meadow harvest results in the unethical deaths of tens of thousands of roe deer fawns. This human-wildlife conflict has led to large-scale fawn rescues by the wildlife managers and public, especially in recent years with the development of thermal-imaging drone use. These efforts are often emotionally driven and widely shared on social media, focusing on protecting visually appealing species. However, this selective attention risks neglecting less “attractive” yet endangered farmland species, such as birds and invertebrates. Therefore—based on the strong public engagement in fawn rescue—the aim is to highlight that the effort should be expanded toward broader biodiversity conservation in agroecosystems, including protection of less attractive species, promoting habitat diversity, sustainable land use, and long-term ecological resilience.
传统的农业做法,特别是草地的快速收割,对野生动物构成严重威胁。鹿(Capreolus Capreolus L.)的小鹿特别脆弱,因为它们的生存策略是躲在高大的植被中不动,以躲避捕食者。在中欧,草场的收割导致成千上万的狍幼鹿不道德地死亡。这种人类与野生动物的冲突导致了野生动物管理者和公众对小鹿的大规模救援,特别是近年来随着热成像无人机使用的发展。这些努力往往是情感驱动的,并在社交媒体上广泛分享,重点是保护视觉上有吸引力的物种。然而,这种选择性的关注可能会忽视不那么“有吸引力”的濒危农田物种,比如鸟类和无脊椎动物。因此,基于公众对小鹿救援的强烈参与,我们的目标是强调应将努力扩大到农业生态系统中更广泛的生物多样性保护,包括保护不太有吸引力的物种,促进栖息地多样性,可持续土地利用和长期生态恢复力。
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引用次数: 0
Synergistic agricultural systems improve soil health and support sustainable land use in sandy soils 协同农业系统可改善土壤健康并支持沙质土壤的可持续土地利用
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2026-01-07 DOI: 10.1016/j.agee.2025.110193
Camila P. Cagna , Moges K. Biru , Diego A.H.S. Leitao , Patricia A.B. Barreto-Garcia , Viviany Viriato , Jose C.B. Dubeux Jr. , Cassio A. Tormena , Marcio R. Nunes
Sandy soils cover around 900 million hectares globally and are increasingly targeted for agricultural expansion and food production. However, these soils are highly vulnerable to degradation due to their low nutrient and water retention capacity, poor structure, and susceptibility to compaction. Our objective was to identify conservation-based production systems to sustain or enhance the health of sandy soils. Soil physical, chemical, and biological properties and processes were assessed across three soil depths (0–5, 15–20, and 25–30 cm). Diversified cropping systems, particularly the sod-based rotation system combined with cover crops and nitrogen fertilization (SBR-GL34), improved overall soil health. This production system increased total soil porosity by up to 18 %, reduced subsurface bulk density by 11 %, and enhanced soil organic carbon stock by up to 18 % compared with business-as-usual (BAU). Labile fractions also improved, with permanganate-oxidizable carbon increasing by 38 %, while β-glucosidase and arylsulfatase increased by 60 % and 64 %, respectively. Despite these improvements, compared to native, all production systems had lower carbon stocks (55–65 %) and showed signes of soil physical degradation. Integrating cover crops, nitrogen fertilization, and grazing also enhanced microbial activity and nutrient cycling, mitigating the negative effects of converting from native to agricultural systems. Among all agricultural systems, SBR-GL34 showed the highest potential to improve (compared to BAU) and sustain (compared to native) soil health and productivity of sandy soils. Overall, combining appropriate nutrient management with long-term agricultural practices that reduce soil disturbance and maximize diversity and soil cover with live plants and crop residue supports sustainable agricultural production in sandy soils.
沙质土壤覆盖全球约9亿公顷,越来越多地成为农业扩张和粮食生产的目标。然而,这些土壤由于营养和保水能力低、结构差、易压实而极易退化。我们的目标是确定以保护为基础的生产系统,以维持或增强沙质土壤的健康。在三个土壤深度(0-5、15-20和25-30 cm)中评估了土壤的物理、化学和生物特性和过程。多样化的种植制度,特别是与覆盖作物和氮肥相结合的草基轮作制度(SBR-GL34),改善了土壤的整体健康状况。与常规生产(BAU)相比,该生产系统将土壤总孔隙度提高了18% %,将地下体积密度降低了11% %,并将土壤有机碳储量提高了18% %。活性组分也得到了改善,高锰酸盐可氧化碳增加了38 %,β-葡萄糖苷酶和芳基硫酸盐酶分别增加了60 %和64 %。尽管有这些改进,但与本地相比,所有生产系统的碳储量都较低(55 - 65% %),并显示出土壤物理退化的迹象。覆盖作物、氮肥和放牧的结合也增强了微生物活动和养分循环,减轻了从原生系统向农业系统转变的负面影响。在所有农业系统中,SBR-GL34在改善(与BAU相比)和维持(与原生相比)沙土土壤健康和生产力方面表现出最大的潜力。总体而言,将适当的养分管理与长期农业实践相结合,减少土壤干扰,最大限度地提高活植物和作物秸秆的多样性和土壤覆盖,可支持沙质土壤的可持续农业生产。
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引用次数: 0
Effects of anti-hail netting on pollinator activity, fruit quality, and economic yield in kiwifruit 防雹网对猕猴桃传粉者活动、果实品质和经济产量的影响
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2026-01-07 DOI: 10.1016/j.agee.2026.110217
Camila Corti , Facundo R. Meroi Arcerito , María Belén Lezcano , Facundo Ramos , Leonardo Galetto , Matías Maggi
Protective anti-hail nets are increasingly used in kiwifruit orchards, yet their integrated effects on pollination and yield are unclear. We compared two prevalent management systems: a netted system (anti-hail net with manual pollination, no on-site hives) versus an open-field system (no net, manual pollination with honey bee hives). Across seven commercial kiwifruit orchards, we assessed pollinator communities, visitation rates, fruit quality (weight and seed number), and economic yield. The management system significantly altered pollinator composition (PERMANOVA: F=4.58, R² = 0.48, p = 0.029). Apis mellifera dominated (>60 % of visits) in open fields but was nearly absent under nets, where syrphid flies prevailed. A complementary analysis on the wild pollinator assemblage (excluding A. mellifera) indicated that netting itself explained 31.5 % of the variation (F = 2.30, R²=0.315, p = 0.086), suggesting a substantial, albeit marginally non-significant, filter effect independent of hive management. Visitation frequency was 47 % lower in the netted system. Fruits from the netted system were 30 % lighter and had 45 % fewer seeds. Gross revenue per hectare was 31.5 % lower under nets (USD 47,385 vs. 69,213). The netted management system explained 46.0–64.6 % of the variance in fruit quality and 58.0 % in economic yield. Our results demonstrate that the netted system creates a substantial pollination deficit not compensated by standard manual pollination, directly reducing fruit quality and profitability. Integrating pollinator-friendly practices is needed to balance crop protection with sustainable production.
防护防雹网在猕猴桃果园的应用越来越广泛,但其对授粉和产量的综合影响尚不清楚。我们比较了两种流行的管理系统:网状系统(防雹网,人工授粉,没有现场蜂箱)和露天系统(无网,人工授粉,有蜂箱)。在7个商业猕猴桃果园中,我们评估了传粉者群落、来访率、果实质量(重量和种子数量)和经济产量。管理制度显著改变了传粉者组成(PERMANOVA: F=4.58, R²= 0.48,p = 0.029)。在野外,蜜蜂占多数(60% %),但在网下几乎没有蜜蜂,而在网下主要是食蚜蝇。对野生传粉者组合(不包括蜜蜂)的补充分析表明,网络本身解释了31.5 %的变异(F = 2.30, R²=0.315,p = 0.086),表明一个重要的,尽管不显著的,独立于蜂箱管理的过滤效应。网络系统的访问频率降低了47% %。网状系统的果实重量轻30% %,种子数量少45% %。净收入下每公顷毛收入减少31.5% %(47,385美元对69,213美元)。网状管理制度解释了46.0 ~ 64.6 %的果实品质变异和58.0 %的经济产量变异。我们的研究结果表明,网状系统造成了大量的授粉缺陷,而标准的人工授粉无法弥补,直接降低了果实的质量和盈利能力。需要整合对传粉媒介友好的做法,以平衡作物保护与可持续生产。
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引用次数: 0
Particulate and mineral-associated organic matter in cropland soils: Meta-analysis of management effects 农田土壤中的颗粒和矿物相关有机质:管理效果的荟萃分析
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2026-01-07 DOI: 10.1016/j.agee.2026.110218
Ranran Zhou , Yanfang Xue , Amit Kumar , Anna Gunina , Jun Ling , Zhenling Cui , Yakov Kuzyakov , Jing Tian
Soil organic carbon (SOC), a critical component of terrestrial carbon storage, can be classified into particulate organic carbon (POC) and mineral-associated organic carbon (MAOC), which differ in both stability and sensitivity to management. POC is dynamic and accumulates rapidly, whereas MAOC is more stable and critical for long-term sequestration, making their simultaneous increase a major challenge in agroecosystem management. Here, we synthesized 1702 paired observations from croplands globally to assess the individual and combined effects of nitrogen (N) and organic matter (OM) inputs on SOC pools, classifying their interactions as additive (sum of individual effects), antagonistic (less than expected), or synergistic (greater than expected). N fertilization alone primarily increased POC by 30 %, contributing to an 11 % rise in total SOC. OM inputs, whether applied alone or in combination with mineral N, increased both POC and MAOC, with integrated N and OM inputs showing predominantly additive effects—increasing POC and MAOC by 87 % and 24 %, respectively. MAOC dynamics were influenced by both edaphic and management factors, with responses being time-dependent and strongly modulated by initial SOC content and pH. Short-term increases in MAOC were particularly evident in low-carbon (<16 g kg⁻¹) and alkaline soils. In contrast, POC was mainly governed by management factors, particularly the interactions between carbon source type and application duration, with manure co-application accelerating rapid accumulation within the first six years. Global projections indicated substantial potential for POC increases, especially in Southeast Asia and Europe, whereas MAOC gains remained spatially constrained. Overall, although N and OM inputs did not consistently yield synergistic effects, combined applications generally outperformed individual inputs and were able to increase POC and MAOC over short timescales, underscoring the advantages of context-dependent integrated management for efficiently increasing sequestration across multiple SOC pools.
土壤有机碳(SOC)是陆地碳储量的重要组成部分,可分为颗粒有机碳(POC)和矿物伴生有机碳(MAOC),两者在稳定性和管理敏感性上存在差异。POC是动态的,积累迅速,而MAOC则更稳定,对长期封存至关重要,这使得它们的同步增加成为农业生态系统管理的主要挑战。在此,我们综合了来自全球农田的1702个配对观测结果,以评估氮(N)和有机质(OM)输入对有机碳库的个体和组合效应,并将它们的相互作用分类为可加性(个体效应总和)、拮抗性(低于预期)或协同性(高于预期)。单施氮肥主要增加POC 30 %,使总有机碳增加11 %。无论是单独施用还是与矿质氮联合施用,有机质的投入均增加了POC和MAOC,其中氮和有机质的综合投入主要表现为加性效应——POC和MAOC分别增加了87% %和24% %。MAOC动态受土壤和管理因素的影响,其响应具有时间依赖性,并受到初始SOC含量和ph的强烈调节。在低碳(<16 g kg⁻¹)和碱性土壤中,MAOC的短期增加尤为明显。土壤POC主要受管理因素的影响,特别是碳源类型和施用时间的相互作用,前6年粪肥共施加速了土壤POC的快速积累。全球预测表明,POC有很大的增长潜力,特别是在东南亚和欧洲,而MAOC的增长仍然受到空间限制。总体而言,尽管N和OM输入并不总是产生协同效应,但组合应用通常优于单独输入,并且能够在短时间内增加POC和MAOC,这强调了上下文相关的集成管理在有效增加多个SOC池的封存方面的优势。
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引用次数: 0
Context-dependent effects of livestock grazing on forest attributes and ecosystem multifunctionality in Nothofagus forests 畜禽放牧对毛竹林森林属性和生态系统多功能性的环境依赖效应
IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2026-01-06 DOI: 10.1016/j.agee.2026.110219
Paula Rodríguez , Verónica Cruz Alonso , Silvina Romano , Gimena Bustamante , Rosina Soler
Forests under livestock grazing sustain important ecosystem services but face potential trade-offs between production and ecological integrity. While the effects of grazing on individual forest attributes are well documented, their integrated consequences remain poorly understood, particularly in temperate forest ecosystems. We evaluated the combined influence of livestock grazing intensity and canopy cover on individual attributes and ecosystem multifunctionality in native Nothofagus forests of Tierra del Fuego, Argentina. Across eight ranches spanning two agroecological regions (Ecotone and Mountain Range), we quantified forest regeneration, understorey richness and biomass, and soil properties, integrating them into a multifunctionality index. Using generalized linear mixed models, we found strong context-dependence: in the Mountain Range, higher grazing intensity reduced seedling and sapling density, organic matter content, coarse woody debris, and overall multifunctionality. In the Ecotone, these effects of livestock use intensity were attenuated, and canopy cover diminished sapling density and multifunctionality, but moderate cover enhanced understorey. Our results extend multifunctionality research from grazed grasslands to grazed temperate forests and show that ecological responses and trade-offs vary across landscape units. We conclude that the Mountain Range is more vulnerable to grazing, requiring stricter management, whereas the Ecotone retains greater capacity to sustain multifunctionality under controlled livestock use intensity. These findings underscore the importance of region-specific silvopastoral strategies that reconcile food production with forest conservation in southern Patagonia and comparable temperate forest landscapes worldwide.
畜牧业下的森林维持着重要的生态系统服务,但面临着生产与生态完整性之间的潜在权衡。虽然放牧对个别森林属性的影响有充分的记录,但其综合后果仍然知之甚少,特别是在温带森林生态系统中。以阿根廷火地岛(Tierra del Fuego)原生林为研究对象,研究了家畜放牧强度和林冠覆盖对原生林个体属性和生态系统多功能性的综合影响。在跨越两个农业生态区(过渡带和山脉)的8个牧场中,我们量化了森林更新、林下植被丰富度和生物量以及土壤性质,并将它们整合成一个多功能指数。利用广义线性混合模型,我们发现了强烈的环境依赖性:在山地,较高的放牧强度降低了幼苗和幼树密度、有机质含量、粗木屑和整体多功能性。在交错带,这些效应减弱,冠层覆盖降低了树苗密度和多功能性,但适度覆盖增加了林下覆盖度。我们的研究结果将多功能性研究从放牧草原扩展到放牧温带森林,并表明生态响应和权衡在景观单元之间存在差异。我们的结论是,山脉更容易受到放牧的影响,需要更严格的管理,而过渡带在控制牲畜使用强度的情况下保持更大的维持多功能的能力。这些发现强调了在南巴塔哥尼亚和世界范围内可比较的温带森林景观中协调粮食生产与森林保护的区域特定森林战略的重要性。
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Agriculture, Ecosystems & Environment
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