Another source of nitrogen pollution comes from fossil fuels, which produce nitrogen oxides when they are burnt.
另一种氮污染的来源为矿物燃料，矿物燃料燃烧时，会产生氮氧化物。
The leaf was the major storage organ for nitrogen and the source of nitrogen for grain filling.
叶片是前期组织氮素的重要贮存器官和籽粒灌浆中氮素的主要供给源。
Urea is commonly used as the source of nitrogen in foliage sprays.
尿素作为氮素给源普遍地应用于叶面喷布。
Description Ammonia (NH 3) or its ion form ammonium (NH 4 +) is an important source of nitrogen for living systems.
产品说明对生命机体来说氨(NH3)或铵离子形式(NH4 +)是氮的重要来源。
Effects of nitrogen application amounts on source of nitrogen accumulation and yields of two peanut cultivars were studied by using the method of pot culture and 15n tracer.
利用盆栽试验和15n示踪技术，研究了不同施氮量对两个花生品种氮素积累来源和产量的影响。
Effects of nitrogen application amounts on source of nitrogen accumulation and yields of two peanut cultivars were studied by using the method of pot culture and 15n tracer.
利用盆栽试验和15n示踪技术，研究了不同施氮量对两个花生品种氮素积累来源和产量的影响。
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