With the growing of income and urbanization,the food consumption structure in urban and rural area of China changes the nitrogen flow model significantly,which has led to tremendous pressure of ecological environment arid serious pollution problems in cities and towns.
为此,本研究利用调查数据、文献资料和统计数据,采用物质流分析的方法,就城镇化发展对我国食物消费体系氮素流动特征、循环利用及其环境排放的影响、城镇化对全国、北京及河北不同年代农田氮素循环的影响进行了初步探讨,以期为解决城镇化过程中城镇本身的生态环境问题及农田养分循环中的生态环境问题提供依据。
Influence of Urbanization on the Nitrogen Flow in Food Consumption System and Nitrogen Cycling in Agro-Ecosystem of China;
城镇化对我国食物消费系统氮素流动和农田氮素循环的影响
The Relationships between Nitrogen Non-point Source Pollution in Weihe River and Human Activities in Its Watershed;
渭河氮素非点源污染与流域人类活动的关系
The dynamic characteristics and modeling of nitrogen in paddy field surface water and nitrogen loss from field drainage
水稻田面水氮素的动态特征、模式表征及排水流失研究
Research on the Dynamic Change and Runoff Loss of Nitrogen in the Soil Surface Water of Rice Fields of Direct Seeding Cultivation
直播水稻田田面水氮素动态变化及径流损失研究
Simultaneous determination of the total nitrogen,ammonium-nitrogen,nitrite-nitrogen,and nitrate-nitrogen in wastewater by continuous fluxion analysis
连续流动分析法同时测定污水中总氮、氨氮、亚硝酸盐氮、硝酸盐氮
Effects and Mechanism on Nitrogen Output in Farmland with Nitrogen Fertilization;
氮肥施用对农田氮素径流输出的影响及其机理
Nitrogen flow in food chain among regions based on MFA and model:a case of Huang-Huai-Hai Plain
基于模型和物质流分析方法的食物链氮素区域间流动——以黄淮海区为例
The Roles of Nitric Oxide and Endothelin-1 in the Changes of Hemodynamics following Endotoxic Shock in Rabbits
一氧化氮和内皮素-1在内毒素休克后家兔血流动力学变化中的作用
Flow Patterns and Flow Regime Maps of Liquid Nitrogen Flow Boiling in Micro/mini-channels
微细通道内液氮流动沸腾的流型特性
Effectiveness of Oryzanol in the Treatment of Clozapine-induced Salivation Reaction
谷维素治疗氯氮平流涎反应效果观察
Study of laws of nitrogen losses from farmland drainage in Zhanghe Irrigation District
漳河灌区农田排水氮素流失规律研究
Effect of DMPP on Inorganic Nitrogen Runoff Loss from Vegetable Soil
DMPP对菜地土壤氮素径流损失的影响
Comparison of Determining the Soil Total Nitrogen Concentration with a Continuous Flow Injection Analyzer and Kjeldahl Method
流动注射法与凯氏定氮法测定土壤全氮的比较
The Effects of N Application Levels on N Use Efficiency in Rice Growth Stages and the Dynamic Variation of N Leaching in Paddy Field;
施氮水平对水稻生育期氮素利用率及稻田氮淋失动态的研究
"Fertilizer-grade urea is a water-soluble, acid-forming material containing about 45 per cent N. When conditioned, it is noncaking and free-flowing, making for excellent storage and handling qualities. "
肥料级尿素是水溶性酸性物质。含氮45％，不结块，易流动，贮存装卸十分方便。
Effect of Shear Rate,NO and ET on Atherosclerosis of Carotid Artery
一氧化氮、内皮素与血流剪切率在颈动脉粥样硬化斑块形成中的作用
Characteristics and Influence Factors of Water Body Nitrogen in Baoxiang River Watershed of Dianchi Lake Area
滇池宝象河流域水体氮素特征及影响因素
Chemiluminescence Determination of Ammonia cat Nitrogen Using Plow Injection Analysis.
流动注射化学发光法测定氨氮的研究