Concentration ratio of N Firms N厂商集中比率
nh -n concentration 氨氮浓度
leaf N concentration 叶片含氮量
ammonia-n concentration 氨态氮浓度
nitrate-n concentration 硝态氮含量
nitrate n concentration 硝态n含量
The growth of Microcystis aeruginosa had a positive relation with N and P concentration.
铜绿微囊藻的生长与氮，磷含量呈正相关。
The concentration of nitrate-N increased continuously in soil surface, which resulted in nitrate leaching to groundwater after rewetting.
土表的硝态氮浓度不断增加，烤田增大了复水后硝态氮向地下水淋溶的趋势。
Under base employ of the coated urea, the total N concentration of farm surface water was near the contract level, and the possibility via runoff was very little.
结果表明，包膜尿素在基施情况下，田面水总氮浓度始终接近对照水平，通过径流损失的可能性很小。
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