1.
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
2.
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
3.
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
4.
Experimental Studies on Adsorption of 13X Zeolite for NH_4～+-N Aqueous Solution;
利用13X沸石分子筛净化含NH_4～+-N废水的实验研究
5.
Studies on the Relationship Between Urease Activity in Sediments and NH_4~+-N in Water in Aquaculture Ponds
养殖池塘底泥脲酶活性与水体NH_4~+-N关系的研究
6.
Effects and Measures of NH_4～+-N and NO_2～--N in Leachate on Soil and Groundwater;
渗滤液中NH_4～+-N和NO_2～--N对土壤和地下水的影响及对策
7.
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
8.
Effects of NH_4~+-N and pH on the Growth and Development in Derooted Seedlings of Cucumis sativas L.;
NH_4~+-N含量和pH值对离体黄瓜去根苗生长发育的影响
9.
A Simulating Test on the Effects of Application Methods of NH_4HCO_3as Base Fertilizer on the Concentration of NH_4~+-N Paddy Field;
水田基肥NH_4HCO_3施用方法对水中NH_4~+—N分配量影响的模拟实验
10.
A Preliminary Study on NH_4~+-N Uptake Kinetics of Potamogeton malaianus under Different Nutrient Conditions
不同营养条件下竹叶眼子菜NH_4~+-N吸收动力学的初步研究
11.
Study on the EPR Parameters of NH_4Br:Cu~(2+)
NH_4 Br:Cu~(2+)的EPR参量研究
12.
Measurement of NH_4~+ activity in leaf cells of rice using double-barreled NH_4~+ selective microelectrodes
双阻NH_4~+选择性微电极测定水稻叶片细胞中NH_4~+的活度
13.
Preparation and Characterization of NH_4～+-Intercalated Molybdenum Disulfide;
（NH_4～+）_xMoS_2插层化合物的制备及工艺研究
14.
Extracting Laminaran Polysaccharides by PEG/(NH_4)_2SO_4 Aqueous two-phase system;
PEG/(NH_4)_2SO_4两水相萃取海带多糖的研究
15.
The research of neissler reagent spectrophotometry for ammonium;
NH_4~+离子的奈斯勒试剂吸光光度法研究
16.
Ion of copper Extraction in the Aqueous Two-Phase System Based on PEG600-PVP Combination Surfactant-(NH_4)_2SO_4-H_2O;
PEG600-PVP-(NH_4)_2-H_2O双水相体系萃取Cu~(2+)
17.
Study on the Leaching of Hemimorphite in the NH_3-(NH_4)_2SO_4-H_2O System
NH_3-（NH_4）_2SO_4-H_2O体系浸出异极矿的研究
18.
Effects of PAA-NH_4 on the Sedimentation of Al_2O_3 Suspension
PAA-NH_4对氧化铝悬浮液沉降性能的研究