对三熟制早稻用氮素化肥作穗肥进行了研究。
Application of nitrogenous fertilizer to early rice at the ear primordia stage under the triple-cropping system was studied.
施用氮素化肥对蔬菜中硝酸盐的累积影响很大。
Nitrogen fertilizer application has a great effect on nitrate accumulation in vegetables.
今后农田施肥，应当重视施用有机肥，控制氮素化肥用量，增加磷素养分比例，适当补施钾肥。
For the future we should attach importance to organic fertilizer on farmland, control the dosage of nitrogen fertilizer, increase the proportion of phosphorus and add kalium fertilizer properly.
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