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1·Micro - Kjeldahl method was developed to determine total nitrogen.

总氮含量测定采用凯氏定氮法。

2·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。

3·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。

4·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。

5·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。

6·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；

7·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%；

8·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。

9·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。

10·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。