Results 21 to 30 of about 1,104,498 (196)
Shuitu Baochi Xuebao, 2017 选取畜禽粪便、天然有机物料、有机肥类有机物料3大类共9种有机物料进行大田试验，设正茬和连作2种种植方式，主要研究不同类型有机物料对土壤养分和生物性状变化特征的影响。结果表明：有机物料施入对提高土壤养分含量和改善土壤生物性状作用效果明显。正茬土壤pH在5.70～6.00之间，连作土壤pH在5.50～5.90之间，施用有机物料小区均高于CK处理。畜禽粪便类有机物料，对提高大豆土壤速效钾含量效果显著，对正茬和连作土壤分别平均提高12.73%和17.09%；猪粪对正茬土壤呼吸提高11.30 ...
王笃超, 吴景贵, 李建明
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Root activity creates unique microbial hotspots in the rhizosphere by influencing the metabolic activities of surrounding soil microorganisms, profoundly regulating the dynamics of soil organic carbon (SOC). However, how root economic strategies affect the formation and
Qiyu Tan +8 more
wiley +1 more source
Gongye shui chuli, 1984 天然水中有机物的主要成份是腐植酸类物质。当对原水进行加氯处理时,水中有机物可能被氯化生成三氯甲烷等有机氯化物,这些物质对人体健康是非常有害的,有的甚至是高度致癌的。在火力发电厂水汽系统中,水中有机物的危害问题引起了人们愈来愈大的关注。水中有机物会引起离子交换树脂的污染而使处理水质恶化。漏过水处理系统的有机物还可能引起热力设备的腐蚀损坏,从而威胁电厂的安全经济运行。因此,如何除去这些有机物己成为水处理技技面临的课题之一。
刘国平
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Journal of Animal Ecology, EarlyView.This population‐comparative study reveals that male and female parents respond differently to social and ecological conditions. This sex‐specific responsive strategy is related to the incongruent parental care systems across populations in Chinese penduline tits.
Jia Zheng +5 more
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Methods in Ecology and Evolution, EarlyView.Abstract Elliptic Fourier analysis (EFA) is often employed in geometric morphometrics (GM), but the normalization of elliptic Fourier descriptor (EFD) has persistently posed challenges for obtaining unique and comparable results, especially in the application of outline‐based GM methods, which limits the implementation in automated analysis of numerous,
Hui Wu +6 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 为探明碳氮添加4年后，土壤全氮、有机碳及其组分（可溶性有机碳、微生物量碳、轻组和重组有机碳）的变化特征，依托布设于甘肃省定西市安定区李家堡镇的不同碳源配施氮素田间定位试验，涉及秸秆、生物质炭、氮素3个因素，秸秆设置为不施、施用秸秆2水平）生物质炭为不施和施用生物质炭2个水平）氮素设置为不施氮、施纯氮50 kg/hm2、施纯氮100 kg/hm2 3个水平，共9个处理。结果表明：不同处理下土壤全氮、有机碳及其组分的含量均随土层的加深而降低。添加生物质炭对土壤全氮、有机碳及其组分均具有不同程度的提升效应 ...
江晶 +4 more
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When and why to give shorebirds a head start
Conservation Biology, EarlyView.Abstract Headstarting is a translocation technique involving the hatching or rearing of wild eggs or young in captivity and the release of those individuals back to the wild at or before independence. It has been trialed as a conservation intervention for shorebirds over recent decades to improve the population trend of target populations by increasing
Lynda Donaldson +4 more
wiley +1 more source
Comprehensive framework for assessing and optimizing existing research networks
Conservation Biology, EarlyView.Abstract Conservation, monitoring, and research networks, or collections of ecological research sites unified under a common mission of data collection or a research mission, are essential infrastructure for understanding large landscapes. However, most networks developed opportunistically over decades rather than through systematic design, creating ...
Alyson East +2 more
wiley +1 more source
Shuitu Baochi Xuebao, 2017 通过连续5年定位试验，以紫云英、秸秆和商品有机肥等有机物料还田的稻田土壤为研究对象，研究有机物料还田后不同物理分组下土壤组成特点和有机碳变化特征。结果表明，稻田土壤团聚体主要分布在2～0.25 mm与0.25～0.053 mm粒级，团聚体颗粒有机碳含量随着粒径的减小而减少。有机物料还田可提高0.25～0.053 mm和＜0.053 mm粒级团聚体有机碳的含量，紫云英、秸秆、商品有机肥等有机物料可通过提高土壤微团聚体有机碳含量而增加土壤碳库。有机物料施用增加土壤轻组组分颗粒含量，减少重组组分颗粒含量 ...
俞巧钢, 邹, 顾国平
doaj
Conservation Biology, EarlyView.Abstract The design of experiments to investigate the combined effects of multiple stressors requires exposing target organisms to multiple combinations of stressor doses. Concurrent manipulation of stressors is often infeasible with wildlife, but long‐lasting health effects allow individual health to be used as an integrator of prior stressor exposure.
Enrico Pirotta +24 more
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