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。
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 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。
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