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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 .
According to the spectral characteristics, physical and chemical properties of long-acting ammonium bicarbonate and its main factors influencing the ammonia volatilization, a mathematical model of ammonia volatilization in soil was established, and the relationship between DCD in long-acting ammonium bicarbonate and free-form Ammonia forms a new viewpoint of intermolecular hydrogen bonding. This weak interaction reduces the apparent concentration of ammonia in the soil and decreases the pH of the soil by 0.2-2.4 during ammonia volatilization, retarding the formation of NO-3N Time to ease the loss of N. Long-acting ammonium bicarbonate can regulate the form of N-supply, time and quantity, reduce the pollution of surface water and groundwater nitrate caused by the application of fertilizer.