In nitrate fertilizer sources, the contents of nitrogen and nitrate in maize were highest.

而以硝态氮肥为氮源时，玉米叶片硝态氮含量和全氮含量最高。

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Field experiment was conducted on studying the affection on the yield of cabbage and the accumulation of nitrate by using different kinds of nitrogen fertilizer.

通过田间试验研究了不同形态氮肥对大白菜产量及硝酸盐累积的影响。

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Fertilizer nitrogen is one of the major sources of nitrate.

而硝酸盐的一个主要来源是化学肥料。

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Ammonium nitrate, a solid fertilizer composed of ammonia and nitrogen, is also a component of explosives widely used in mining.

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