Micro - Kjeldahl method was developed to determine total nitrogen.
总氮含量测定采用凯氏定氮法。
Experimental study on the nitrogen of total nitrogen content of soybean.
实验研究了施氮对大豆全氮含量的影响。
Regress the load of nitrate, ammonium and total nitrogen by MQ equation.
对硝氮、氨氮、总氮产污负荷进行MQ回归，提炼回归方程。
Organic carbon and total nitrogen in bed load had enrichment phenomenon.
推移质中有机碳和全氮均有富集现象。
The medium grazing favored a increase of content of total nitrogen in root.
放牧区根系的平均含氮量均高于对照区，中度放牧有利于根系氮贮量的提高。
The variation coefficient of total nitrogen(17%) was the smallest and more stable.
总氮的变异系数（17%）最小，比较稳定；
Soil total nitrogen contents in 77.3 % production units were high, 22.7 % units low.
全氮含量处于中高水平的生产单位占77.3%，处于低水平的生产单位占22.7%；
And the content of total nitrogen in the river is higher than that in the brook every month.
溪水和河水总氮的时间变化趋势一致，且各月河水的总氮含量都高于溪水。
The methods for determining total nitrogen and basic nitrides content in diesel oil are described.
介绍了测定柴油中总氮及碱性氮含量的各种方法。
The contents of total nitrogen had a significant positive relationship with the soil organic carbon.
人工林土壤全氮与土壤有机碳含量之间呈显著的线性正相关。
Total nitrogen and total phosphorus in tobacco field soil were determined with a Skalar flow analyzer.
利用流动分析仪测定了烟田土壤中的全氮、全磷。
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。
Contrast to soil available nitrogen, soil total nitrogen was not influenced by the environmental factors.
而优势物种和功能群组成对土壤全氮的影响作用相对较弱。
The soil organic carbon and total nitrogen contents obviously decreased and shown an upper-accumulated pattern.
土壤有机质和全氮含量也自上而下显著的下降，表现出明显的表层聚集现象。
Soil organic matter, total nitrogen, total phosphorus, available nitrogen had middle spatial correlation patterns.
土壤有机质、全氮、全磷、速效氮具有中等空间自相关性。
Total nitrogen contents of surface soil in three forest types changed with seasons distinctly, and overall extents were not big.
三个林型表层土壤全氮含量季节变化规律明显不同，总体变化幅度都不大。
Topdressing nitrogen treatment had no obvious effect to total nitrogen in soil, but it had a stronger effect to alkalined-nitrogen.
追氮处理对土壤全氮没有明显的影响，但对土壤大麦碱解氮的影响比较大。
The results indicate the maximal relative error between simulation values and observation values of total nitrogen concentration is 11.67%.
结果表明，地下水总氮含量模拟值与实测值最大相对误差11.67%。
Two alternative methods measuring total nitrogen of aquaculture pond soils, named total Ammonia method and Nitrate method, were established.
本实验创立了二种水产养殖池塘底泥总氮含量简易测定法，分别称为总氨法和硝酸盐法。
Drought increased, while waterlogging reduced the contents of total nitrogen and free amino acid in stem and sheath, and that of protein in grain.
干旱处理提高了茎鞘总氮与游离氨基酸含量以及籽粒蛋白质含量，而渍水处理则使其降低。
Total nitrogen and organic matter contents had the same distributed patterns, which were higher in the north, but lower in the middle and south part.
全氮和有机质含量的分布格局基本一致，具有北部高、中部和南部低的分布特征。
The content of total nitrogen and total phosphorus in every forest runoff is higher than rainfall, and that of Coniferous mixed forest is the highest.
各林分地表径流的总磷、总氮含量均高于大气降水，樟落混交林的总磷、总氮含量最高。
The result shows that the content of soil organic matter, total nitrogen and different forms nitrogen decreased firstly, then increased by time pasted.
结果表明，该区域土壤有机质、全氮及各形态氮素含量呈现先降后升的趋势。
Meantime it keeps the coefficient of homogeneity of red clover far below the 1.0 level but causes the total nitrogen content of soil to decrease by 0.085%.
中度放牧并未使草地牧草产量和红三叶的重要值降低，同时使草地红三叶均质度系数保持在远低于1.0水平以下，但使土壤全氮含量下降0.085%。
The numbers of individuals and groups of soil fauna were significantly and positively related to contents of organic matter and total nitrogen in the soil.
土壤动物的类群数、个体数量与土壤有机质、全氮的含量呈明显的正相关；
Applying nitrogen fertilizer at heading stage could enhance contents of total nitrogen, total soluble protein, free amino acids and free lysine in wheat grains.
抽穗期施氮肥可提高小麦籽粒的全氮含量、总可溶性蛋白质量及游离态氨基酸与游离态赖氨酸量等。
There are several key points including blank value, treatment of sediment and comparison of three kinds of nitrogen when monitoring and analyzing total nitrogen.
阐述了在水质总氮的分析中，应注意空白值、沉淀物处理、与三氮比较等几个方面的问题。
The NWSN /total nitrogen ratio was bigger than 90 % in trifoliolates, higher than that in stems and that in petioles, but they changed hardly with growing stages.
植株各部位非水溶性氮含量占全氮的比例，叶片在90%以上，高于茎和叶柄，随生育时期变动很小。
The results showed that:1) The high content of nicotine, the low content of total nitrogen and potassium were found in central and south Henan tobacco-growing areas.
结果表明：1）豫中和豫南两个烟区烟叶的烟碱含量均偏高，总氮和钾含量偏低。
The results showed that:1) The high content of nicotine, the low content of total nitrogen and potassium were found in central and south Henan tobacco-growing areas.
结果表明：1）豫中和豫南两个烟区烟叶的烟碱含量均偏高，总氮和钾含量偏低。
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