, 2007 在滴灌条件下,利用流动分析仪测定基因型差异较大的陆地棉和海岛棉在不同施氮水平下,各主要生育期0~60 cm土壤无机氮含量,对土壤氮素营养诊断及氮肥推荐技术基因型间的异同进行试验研究。结果表明:不同棉花品种0~20 cm土壤Nmin含量与施氮量和产量均有显著的正相关关系,采样深度增加相关性降低,品种间基肥和追肥总量氮肥推荐指标差异不显著,可采用同一标准。但由于2个品种各时期吸收氮的能力不同,不同品种主要生育时期最佳供氮量,植株全氮含量和收获后0~60 ...
仲桂军, 冯固, 田长彦, 马英杰
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Plant nutrient‐acquisition strategies contribute to species replacement during primary succession
Journal of Ecology, Volume 113, Issue 4, Page 988-1003, April 2025.Pioneer species Hippophae acquires phosphorus and nitrogen mainly by ‘mining’ and N2‐fixing strategies and thus dominates in the beginning of primary succession. As soil nutrient availability increases with the mobilization of apatite‐P and input of N‐rich plant residues, Hippophae' strategies become less efficient than Populus's scavenging strategies.
Xiao‐Long Li +12 more
wiley +1 more source
Shuitu Baochi Xuebao, 2018 为探明缓释尿素与普通尿素掺混比例对安徽小麦花后氮素运转特征和土壤氮素盈余的影响，分别选择安徽省北方小麦产区小麦—玉米轮作和南方小麦产区小麦—水稻轮作方式，土壤类型分别为两合土和黄棕壤，设置不施氮肥处理（CK）、农民习惯处理（Ncon）、减少普通尿素用量的优化氮素处理（Nopt）、缓释尿素及其掺混普通尿素处理（SRU1、SRU2、SRU3）和普通尿素全部基施处理（SRU4），分析了不同施肥处理在两种土壤上小麦花后氮素转运、产量、氮肥利用率和土壤无机氮积累量。结果表明：与黄棕壤比较 ...
袁嫚嫚 +5 more
doaj
Denitrification Determination in soil of Wu Chuan Agricultural Catchment and the Control Measure [PDF]
, 2007 反硝化作用是土壤氮素转化的一个重要过程,为探明五川流域内的农业土壤的反硝化作用强度及其影响因素,利用乙炔抑制-原状土柱培养法对其进行测定。通过3次试验测定,发现五川流域农业土壤具有较强的反硝化作用强度,在种植季节,土壤平均反硝化作用强度为0.1kgN·hm-2·d-1,最高达到0.6kgN·hm-2·d-1,其中蔬菜地反硝化作用强于其他土地利用类型。反硝化作用同土壤的NO3-含量、含水量、温度以及pH都存在正相关关系,它们是流域土壤反硝化作用的主要影响因子 ...
徐玉裕 +5 more
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Greenhouse Gas Mitigation and Yield Response to Biochar-Microbial Amendment in Saline-Alkali Soil [PDF]
[Objective] To investigate the effects of combined application of biochar and microbial fertilizer on greenhouse gas emissions and sunflower yield in saline-alkali soil under plastic film mulching and drip irrigation.
JI Wentao +6 more
core +1 more source
Nitrogen mineralization and denitrification in bamboo riparian systems in Southeastern China [PDF]
, 2011 采用原位培养法和乙炔抑制-静态土柱培养法,对南方丘陵地区竹林河岸系统的矿化、反硝化作用进行了研究.结果表明,研究区土壤氮矿化速率为-0.28~0.30Mg·kg-1·d-1(以n计,下同),且与土壤含水量存在显著正相关(P河岸入口>河岸中部,并呈现出较大的时空差异.硝化和反硝化过程存在较强的耦合作用.较河岸区入口处和中部区而言,毗邻河道的河岸区的生物地球化学过程更为活跃.In situ nitrogen mineralization and denitrification rates in top ...
方婧, 曹文志, 苏彩霞
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Response of Microbial Community Structure and Diversity to Nitrogen Deposition in Soils of Pinus yunnanensis Forest of the Central Yunnan Plateau [PDF]
[Objective] To study the characteristics of changes in chemical properties and diversity and structural composition of soil microbial communities in Pinus yun-nanensis soils on the Central Yunnan Plateau under nitrogen deposition, and to analyze the ...
DENG Qiujiang +6 more
core +1 more source
Shuitu Baochi Xuebao, 2022 为探明减氮配施缓释氮肥对棉田土壤酶活性和氮素吸收利用的影响,通过试验研究减氮、配施不同比例缓释氮肥对棉花土壤理化性质、酶活性、无机氮含量、氮肥利用率及棉花产量的影响。试验选用"新陆早64号"棉花品种,设置2种施氮方式,分别为常规全施尿素(T2)和缓释氮肥与尿素不同比例配施(US),配施处理按照施氮量设3个水平,分别为不减氮U0.8S0.2(T3)、U0.6S0.4(T4),减氮20% U0.6S0.2(T5)、U0.4S0.4(T6),减氮40% U0.4S0.2(T7)、U0.2S0.4(T8 ...
邱悦 +5 more
doaj
Nitrogen Sources, Transports and Transformations in Headwater Catchment [PDF]
, 2007 过量施肥、化石燃料的燃烧等人类活动带来的氮负荷问题对陆地和水生生态系统的影响迅速扩大，引起了全世界的关注。当流域陆地生态体系的氮素饱和后，过量的氮素会通过地表径流和地下潜流排入溪流、湖泊、河流和海洋中。因为溪流直接迁移了流域体系过多的氮素，研究氮在溪流中的循环过程之前了解流域氮素流失到溪流的过程机制至关重要。因此，对五川流域氮素流失的过程机理进行研究以及探讨氮在溪流中的迁移转化行为，有利于阐明流域体系的氮在溪流中的循环过程。 本研究融合多学科知识，在GIS技术支持下，综合运用现场定位试验、模型模拟 ...
王吉苹
core
Research advances in the interaction mechanism and ecological functions between orchard soil microorganisms and physicochemical properties [PDF]
The complex and dynamic interactions between soil microbial communities and soil physicochemical properties constitute a fundamental mechanisms maintaining the stability, functionality, and long-term sustainability of terrestrial ecosystems.
DONG Tie +4 more
core +1 more source