摘要
研究以盆栽试验为主,并结合大田试验,利用^(15)N示踪法对我国南方两种土壤上尿素、硝酸铵不同氮肥的去向及脲酶抑制剂对氮肥去向的影响进行了细致研究。特别阐明了氨的挥发和氮素的淋溶损失动态状况。在黄棕壤上,尿素中氨的挥发损失率大于硝酸铵,分别为11.7%和8.1%,前者比后者大43.7%;而氮的淋溶损失率则相反,分别为0.70%和0.79%,硝酸铵淋溶损失率比尿素高11.4%。在红黄土上氨的挥发损失率比在黄棕壤上小,仅为5.3%。首次指出了这两种氮肥的挥发损失远大于淋漏损失的结果。查明了增施脲酶抑制剂对提高氮肥利用、减少氨的挥发损失的明显作用。
A pot experiment was conducted by using ^(15)N isotope tracer in studying carefully the fate of two kinds of N fertilizers——urea and ammonium nitrate in two types of soils in central China——yellow brown soil and red yellow soil, and the influence of urease inhibitor. The volatilization and eluviation of the two kinds of N fertilizers after applying to wheat growing soils were elucidated. The result is put forward for the first time that the loss of N caesed by volatilization is more than eluviation. The eff...
出处
《同位素》
CAS
北大核心
1992年第4期193-197,共5页
Journal of Isotopes
关键词
^(15)N同位素示踪
尿素
硝酸铵
黄棕壤
红黄土
脲酶
^（15）N isotope tracer
urea
ammomium nitrate
yellow-brown soil. red-yellow soil
urease.
