摘要
依据长效碳铵的光谱特征、理化特性及其对影响氨挥发的主要因子的分析 ,建立了土壤中氨挥发的数学模式 ,提出了长效碳铵中DCD与从碳铵中离解出来的游离态氨形成分子间氢键的新观点 ,这种弱相互作用力降低了土壤中氨的表观浓度 ,使土壤 pH在氨挥发期间降低了 0 .2～ 0 .4,延缓了NO-3 N形成时间 ,缓解了N损失 .长效碳铵能够调节N素供应的形态、时间与数量 ,减少施用化肥后引起的地面水和地下水硝酸盐的污染 .
In this paper, the general equation for volatilization losses of the ammonia was established based on the analysis for the dominant factors affecting the extent ammonia volatilization. The hydrogen bonds between DCD presented in DEAB and free state ammonia dissociated from AB are probably formed and are well documented by the spectra and properties of DEAB. This interaction force could drop the ammonia apparent concentration and lower pH 0.2～0.4 during ammonia volatilization. As compared with AB, DEAB could delay the formation of nitrogen as nitrate species, reduce the loss of nitrogen by leaching and increase NH + 4 N inventory in soil. Thus, DEAB can regulate the nutrient accommodation in form, time and amount, reduce pollution of ground and surface water by fertilizer-derived.
出处
《应用生态学报》
CAS
CSCD
1997年第3期279-282,共4页
Chinese Journal of Applied Ecology
基金
中国科学院"九五"重大科研项目!( 0 1 960 0 0 2KB)
关键词
碳酸氢铵
长效碳酸氢铵
氨挥发
环境
Ammonium bicarbonate,Durably efficacious ammonium bicarbonate,Dicyandiamide,Ammonia volatilization.
