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氮素肥料施于土壤后,植物从所施氮肥回收的氮素经常<50%。Allison(1955,1966,1973)通过氮素平衡实验推测,氮素亏损约在15-20%。陈荣业、朱兆良(1982)用~(15)N测定石灰性上壤的水田中,硫铵和尿素的氮素损失皆为50%,而碳铵则高达70%;在非石灰性土壤上,尿素和碳铵皆为50%而硫铵则较低(28.5%)。氮素的损失有多方面原因,本文仅综述氮素肥料的氨挥发问题。
Nitrogen fertilizer plants often recover <50% from applied nitrogen fertilizers when they are applied to soil. Allison (1955, 1966, 1973) estimated from the nitrogen balance experiment that the nitrogen loss is about 15-20%. Chen Rongye and Zhu Zhaoliang (1982) measured the nitrogen loss of ammonium sulfate and urea in the paddy soils with ~ (15) N, both of which were 50% for ammonium and 70% for ammonium bicarbonate; on non-calcareous soil, urea Both ammonium bicarbonate and ammonium bicarbonate are 50% and ammonium sulfate is lower (28.5%). There are many reasons for the loss of nitrogen, this article only summarizes the problem of ammonia volatilization of nitrogen fertilizers.