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目前我国化学氮肥的生产和施用结构中NH_4HCO_3约占70％,但随着小氮肥厂的改造和联碱工业的发展,氯化铵的生产量和施用量将日益增多。为此,我们选用了碳酸氢铵、尿素和氯化铵三种常用的氮肥,进行了它们在土壤中的转化特点和相对肥效的研究,以探索这几种氮肥的合理施用及防止氮素损失方法,提高氮素利用率的可能途径。
At present, NH_4HCO_3 accounts for about 70% of the production and application structure of chemical nitrogen fertilizer in our country. However, with the transformation of small nitrogenous fertilizer plants and the development of the alkaline industry, the production and application rate of ammonium chloride will increase day by day. To this end, we selected three commonly used nitrogen ammonium bicarbonate, urea and ammonium chloride, their transformation characteristics in the soil and the relative efficiency of the study to explore the rational use of these types of nitrogen and to prevent nitrogen losses Methods, ways to improve nitrogen utilization.