论文部分内容阅读
1988~1989年应用~(15)N标记研究硝酸铵施用在烟草土壤中的去向及土壤供氮能力。表明:硝酸铵利用率为17%~26%;损失大于40%。六个田间试验微区结果:土壤全氮含量、碱解氮含量与“A”值间呈显著相关;随海拔的升高,土壤供N量占全氮、碱解氮的比率显著减少。
Study on Fate of Nitrate Ammonium Nitrate Application in Tobacco Soil and Soil Nitrogen Supply Ability Using ~ (15) N Marker from 1988 to 1989. The results show that the utilization rate of ammonium nitrate is 17% ~ 26% and the loss is greater than 40%. The results of six field trials showed that there was a significant correlation between soil total nitrogen content and alkali-hydrolyzable nitrogen content and “A” value. With the elevation increasing, the ratio of soil N supply to total nitrogen and alkali-hydrolyzed nitrogen decreased significantly.