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。
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。
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。
The influence of nitrogen fertilizers breed and different fertilizer compounds on growth and nitrate content of celery were studied by field experiment.
通过田间试验研究了氮肥品种组合及不同肥料配施对芹菜生长和硝酸盐含量的影响。
In this study, the influences of different nitrogen fertilizer variety, nitrogen level and basal manure on nitrate accumulation and quality of cabbage were investigated in field experiments.
本文在田间试验条件下探讨了氮肥品种、用量及不同基肥种类对包心菜硝酸盐累积及品质的影响。
Effects of fertilizer application on nitrogen utilization efficiency and nitrate content in hybrid Pennisetum was studied in Nanjing, Jiangsu province.
在江苏南京地区，研究了肥料运筹对杂交狼尾草氮素吸收利用效率和植株硝酸盐含量的影响。
Nitrogen fertilizer application has a great effect on nitrate accumulation in vegetables.
施用氮素化肥对蔬菜中硝酸盐的累积影响很大。
Effects of applying different nitrogen fertilizer on yield, quality and nitrate leaching in soil layer were studied during the cucumber growth period in greenhouse.
不同施氮措施条件下，对保护地黄瓜生育期内氮素吸收利用效率、氮素淋洗损失进行了研究，同时也研究了不同处理对黄瓜产量及品质的影响。
The nitrogen fertilizer losses in paddy field involve nitrification-denitrification, ammonia volatilization, nitrate leaching and runoff.
稻田中氮素损失途径主要有氨挥发、硝化-反硝化、淋洗和径流，其中氨挥发是氮素损失的主要途径。
The nitrogen fertilizer losses in paddy field involve nitrification-denitrification, ammonia volatilization, nitrate leaching and runoff.
稻田中氮素损失途径主要有氨挥发、硝化-反硝化、淋洗和径流，其中氨挥发是氮素损失的主要途径。
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