Effects of Cross-slope Tillage and Increasing Organic Fertilizer on Soil Nitrogen and Phosphorus Loss Characteristics and Soil Fertility on Gentle Slope [PDF]
, 2023 [Objective] Nitrogen and phosphorus loss characteristics and soil fertility changes on a gentle slope of cultivated land were analyzed under optimal fertilization and cross-slope tillage in order to provide a basis for reducing nitrogen and phosphorus ...
Chen Jianjun +4 more
core +1 more source
Effects of Continuous Straw Returning Combined with Reduced Fertilizer Application on Rice Yield and Loss of Nitrogen and Phosphorus [PDF]
, 2022 [Objective] The effects of straw returning combined with reduced chemical fertilizer application on rice yield and nitrogen and phosphorus losses with runoff were studied in order to provide a scientific basis for the recycling and reuse of local ...
Liang Fan +8 more
core +1 more source
Effects of Configuration Ratios for Contour Planting and Replanted Sugarcane on Gully Erosion-Induced Nitrogen and Phosphorus Losses on Slopes [PDF]
, 2023 [Objective] The suitable configuration ratios for contour planting and replanted sugarcane on slopes were determined in order to provide technical support for reducing slope ditch erosion and nutrient loss, improving cultivated land quality and rational ...
Chen Tingting +8 more
core +1 more source
Effects of Different Vegetation Coverage of Vetiver in Reducing Ditch Erosion and C, N, P Loss [PDF]
, 2023 [Objective] The influences of plants on reducing ditch erosion and C, N and P loss were studied in order to provide technical support for the prevention of ditch erosion and pollution control.
Chen Tingting +8 more
core +1 more source
Effects of Interplanting Medicinal Herbs on Runoff, Sediment and Nitrogen and Phosphorus Losses in Young Oil Tea Plantation on Red Soil Sloping Field [PDF]
[Objective] To investigate the effects and applicability of different intercropping patterns of medicinal herbs on water, soil, and nutrient losses in young oil tea gardens on red soil slopes. [Methods] Runoff plot experiments were carried out in Jiangxi
DUAN Jian +4 more
core +1 more source
Characteristics of nitrogen and phosphorus losses with surface runoff in typical sub-watersheds of Jiulong River watershed. [PDF]
, 2004 选取九龙江流域5个典型汇水区,通过流域主要雨季天然降雨径流过程监测,对所获得的氮磷营养盐的监测数据进行归纳与分析,着重探讨了暴雨事件下径流氮磷流失及其形态的变化规律。结果表明:暴雨事件下农业汇水区地表径流氮输出以水溶态为主,磷以泥沙结合态为主,天然林地为主的汇水区则相反,前者以泥沙结合态为主,后者以水溶态为主;5个汇水区暴雨事件中总氮最高浓度值为日常采样浓度值的2.9～11.3倍,暴雨事件中总磷最高浓度值为日常采样浓度值的2.9～20.5倍;氮磷输出量均值的差异反映氮磷输出量大小受土壤质地、施肥量 ...
张珞平 +5 more
core
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
Study on Agricultural Non-Point Source Pollution of Wuchuan Catchment in Upstream Jiulong River [PDF]
, 2003 九龙江是龙岩、漳州和厦门三市的饮用水源，同时该流域又是近海流域。目前流域的农业非点源污染已经比较突出，因此，对九龙江流域农业非点源污染的研究，具有重要的现实意义和理论价值。 在九龙江上游遴选一个典型农业流域——五川流域，通过广泛的实地调查获得了流域大量的基础数据，并通过2002年全年降雨事件降雨径流、水质测定以及大田不同土地利用类型下的浅层地下水质的测定等工作，本论文取得了以下成果： 第一、对九龙江上游五川流域的氮磷地表径流流失规律及特征进行了探讨，揭示了7~9月总氮 ...
张玉珍
core
Study on Livestock Production Pollution & Land Assimilative Capacity for Manure in Jiulong River Watershed [PDF]
, 2005 随着我国畜禽养殖业的迅猛发展，畜禽养殖已成为我国农业非点源污染和点源污染的主要来源之一，对生态环境构成了严重威胁。传统的畜禽养殖污染控制只注重末端的工程技术治理，已不能适应我国畜牧业发展与环境保护矛盾突出的国情。从机理上认识养殖污染物流失特征、迁移转化规律及其环境效应，从总量控制原则的管理层次上评估区域的畜禽粪肥土地消纳容量，对养殖污染物的产生、释放、迁移等全过程控制及其环境管理具有重大的理论价值和实践意义。本文以福建省九龙江流域为例，以环境科学、农业生态学、环境经济学、信息学等基本理论为基础 ...
曾悦
core
Analysis of the Dynamic Relationship between Runoff and Phosphorus Transport in the Menglianggu Small Watershed [PDF]
[Objective] To investigate the characteristics of runoff-phosphorus loss hysteresis relationship under different rainfall types. [Methods] This study focused on the Menglianggu small watershed in the rocky mountainous area of northern China.
HU Yanxia +5 more
core +1 more source