1.
Effect of Water Saving and Nitrogen Controlling on Nitrogrn Balance and No_3~--N Leaching of Different Soil-Vegetable Systems Ningxia;
节水控氮对宁夏不同土壤—蔬菜体系中氮素平衡及NO_3~--N淋失的影响
2.
Effect of Element Sulphur and Dicyandiamide on Leaching Loss of NO_3～--N from Vegetable Soil;
元素硫、双氰胺及其组合对蔬菜地土壤NO_3～--N淋失的影响及机理研究
3.
Soil Nitrate Leaching Risk Assessment in Rubber Plantations in Hainan and Analysis of Its Influencing Factors
海南胶园土壤NO_3~--N淋洗风险评估及影响因素分析
4.
Determination of Ammoniacal Nitrogen and Nitric Nitrogen on Soilless Culture;
无土栽培中NH_4~+—N和NO_3~-—N的测定
5.
Study on the Extraction Condition of Nitric Nitrogen and Ammonium Nitrogen in Substrates of Soilless Culture
无土栽培基质中NO_3--N和NH_4~+-N提取条件的研究
6.
Experimental Study on NO_3～--N Deep Migration in Loess Plateau of Aerated Zone under Irrigation Condition;
黄土塬灌区包气带NO_3～--N运移规律的试验研究
7.
~(15)N-labelled Static and Soil Column Dynamic Simulating Experiment of Nitrate-nitrogen Removal
~(15)N标识的NO_3~-去除的静态和土柱动态模拟试验
8.
Effects of Pretreatment on Content of Soil NO_3-N,NH_4-N
不同前处理条件对土壤NO_3-N、NH_4-N含量影响的研究
9.
Effects of two forms of mineral nitrogenous fertilizers on nematode community composition and diversity in rhizosphere of cucumber in greenhouses
NH_4~+-N和NO_3~--N肥对大棚黄瓜根际土线虫群落组成及其多样性影响
10.
Effect of coating and dicyandiamide incorporation on NH_4~+ nitrification and NO_3~- leaching
双氰胺与尿素共包被对NH_4~+硝化及NO_3~-淋溶的影响
11.
N and P Leaching and Its Relations with Fertilization in Vegetable Soils in Dongting Lake Area
洞庭湖区菜园土N、P养分径流淋失及其与蔬菜施肥的关系
12.
Experiment Study on Nitrate Transport Characteristics and NO_3~--N Distribution in Groundwater under Intermittent Infiltration of Surge Irrigation;
波涌灌间歇入渗氮素运移及对地下水NO_3~--N分布特性影响试验研究
13.
Study on Yield and Varieties of the NO_(3-)-N Contain with Different Water and N Levels in Potato;
水肥耦合条件下马铃薯产量和NO_3~--N动态变化研究
14.
The Effect of N Fertilizer Applied on the Content of Soil NO_3~--N Remained and the Space Distribution of Winter Wheat Roots;
氮肥施用对冬小麦土壤残留NO_3~--N含量及根系分布影响
15.
Effects of Phosphate Fertilizer Applied to Topsoil on the Movement and Residual Effect of Nitrate Accumulated in Deep Soil Profile
耕层施磷对土壤剖面深层累积NO_3~--N运移及后效的影响
16.
Effect of Irrigation Fertilizer Application on Grounderwater Nitrate Nitrogen Concentration under Intermittent Infiltration
施肥方式对波涌灌溉间歇入渗地下水中NO_3~--N浓度的影响
17.
Study on Release and Leaching of N, P, K from Sewage Sludge Applied in Red Soil
红壤中污泥N、P、K释放及淋溶研究
18.
fresh andor rain water damage
淡水和雨淋损淡水和或雨淋损失