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NO3-N

NO3-N

NO3-N

NO3-N

1

From the absolute quantity , no matter in rice planting or not, the main loss of nitrogen was NO3--N.

从绝对数量看，种植水稻与不种植水稻氮处理渗漏都以 NO3--N 为主。

2

NO3- load in sludge is reduced , denitrification rate of NH3- N and removal rate of COD are substantially increased .

使污泥的 NO3-负荷减少，氨氮的反硝化率和 COD 的去除率显著提高。

3

Mechanism of NO3(superscript -)-N contamination is interpreted by data of 14C in this paper . Finally, we bring forward preventable measures.

本文结合 14C 资料对地下水 NO3 （上标 -）-N 污染机理进行了分析，并提出了相应的防治措施。

4

And NO3 --N can be leached to soil layer below die wetting depth .

在一次灌水后，NO_3~-—N 会被淋洗至计划湿润层深度以下的土层中。

5

effect of sulphur application on NO3-N content of cabbage head was conducted in pot experiment .

通过盆栽试验，研究了土施硫磺对甘蓝叶球 NO3-N 含量的影响。

6

The leaching degree of Ndeepened and NO3--Ncontent in soil was increased gradually along with the increment of Nfertilization amount .

随着施氮量的增加，氮淋失程度加深，土壤中的 NO3--N 含量逐渐增加。

7

NO3--N concentration in lower soil solution increased with the increase of fertilizer ;

下层土壤溶液中 NO3--N 含量随着施肥量的增加而增加；

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