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Maize straw returning to the field can increase the soil total nitrogen and inorganic nitrogen content. 秸秆还田增加了土壤全氮和无机氮含量。
The total nitrogen content of compound fertilizer have been studied using the Kjeldahl Method. 摘要采用凯氏定氮法，对复合肥料总氮含量进行了测定研究。
The experiment indicates that the ammonia nitrogen content in the synthesized CNN is 22.78%,and its total nitrogen content comes to 35.08%. 实验表明;合成的CNN中氨态氮含量22.;78%25;总氮含量35
Total nitrogen content decreased gradually (upper: Y= -0.0026X2 -0.0327X+5.0258,R2=0.952*; middle leaf: Y=-0.0027X2-0.0034X+3.9486, R2=0.9801**). 淀粉呈现出上部叶增加（Y=0.;011X2-0
The total nitrogen(TN) is removed by 44.7% after stage A,but the ammonia nitrogen content rises up after stage B,so the TN removal rate drops to about 35.7%. A段对TN的去除率平均为44.;7%25;经过B段后NH+4-N含量升高;使AB工艺对TN的总去除率降至35
Result of the te st showed that the inoculated refuse compost was found with its decomposing rate faster, the total nitrogen content and ammonium-nitrogen content higher. 接种的固氮菌及堆肥中原来存在的固氮菌均能在堆肥中生长繁殖,接种固氮菌的堆肥的固氮菌数较高;
The negative correlation between the total nitrogen content of leaves and fresh nodule weight,nodule nitrogenase activity were significant respectively. 叶片全氮含量与根瘤鲜重、根瘤固氮酶活性之间呈显著负相关。
During composting, total nitrogen content descended by 26.3% and total nitrogen lost by 50%, which were attributed mostly through ammonia volatilization. 一次发酵前后，厨余堆肥全氮含量下降了26.;3%25，总氮损失率达50
Gao Anshe,Zheng Shuhua,Zhao Mengli,Han Guodong.Soil organic carbon and total nitrogen content in different stepps[J].Grassland of China,2005,27(6):44-48. [27]高安社;郑淑华;赵萌莉;韩国栋.;不同草原类型土壤有机碳和全氮的差异[J]
Furthermore, the linear regression equations of total nitrogen in pig urine and electrical conductivity (EC) provide reliable and accurate indication of total nitrogen content in pig urine. 分析中发现猪尿中总氮和铵态氮比例基本稳定 ,由此推想用电导率来预测猪尿中总氮的含量 ,获得了很好的效果。
The results indicated that seven proportion of NO3--N and NH4+-N reduced fresh nodule weight and inhibited activity of nodule nitrogenase,but increased the total nitrogen content of leaves. 结果表明:7种配比的NO3--N与NH4+-N均降低根瘤鲜重，抑制根瘤固氮酶活性，但提高叶片全氮含量。
The results showed that the moisture and chlorophyll contents in tobacco leaf decreased gradually, total nitrogen content changed little, nicotine content declined slightly as the advance of curing. 结果表明,烟叶含水率和叶绿素含量随调制进程的推进而逐渐下降,在凋萎变黄期间烟叶中淀粉、蛋白质含量逐渐减少,总糖和游离氨基酸含量增加。
Soil Organic Carbon and Total Nitrogen Content in Different Steppes 不同草原类型土壤有机碳和全氮的差异
Method for determination of total nitrogen content in oilseed residues 油料饼粕总含氮量的测定法
changes in soil organic carbon and total nitrogen contents 土壤有机碳氟的变化
Determination of total nitrogen (Kjeldahl). 英文名称： Soils quality.
Determination of total nitrogen content of milk product by ammonia gas-sensing electrode 用氨气敏电极测定乳品中总氮含量的研究
Analysis of Soil Moisture, Organic Matter and Total Nitrogen Content in Loess in China with Near Infrared Spectroscopy 我国黄土区土壤水分、有机质和总氮的近红外光谱分析
Determination of Total Nitrogen Content by Coupling Microwave-Sealed Digestion and Nitrate Radical Selective Electrode 微波消解-电极法测定水体中总氮
After harvesting the crops, he tested them for nitrogen content. 作物收获后，他测定了作物中氮的含量。