Nitrite nitrogen&nitrate nitrogen 硝酸氮及亚硝酸氮
In water, nitrogen exists in form of organic nitrogen, ammonia nitrogen, nitrite and nitrate.
在水中，氮是以有机氮、氨态氮、亚硝酸氮和硝酸氮的形式存在的。
The measurement of nitrate nitrogen and nitrite nitrogen in seawater has such disadvantages as many disturbing components, long time, poor repeatability and accuracy.
水体中尤其是海水中硝酸盐氮的测定较繁琐，干扰物质多，分析时间长，重现性差，准确性不高。
As to the whole quality of tobacco leaf, the blend 50% : 50% of nitrate nitrogen and nitrite nitrogen is the advisable choice.
从烟叶总体质量上讲，硝态氮与氨态氮的质量比为50%：50%是可取的肥料配比。
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