氨挥发与土壤水分散失关系的研究

在封闭条件下 ,利用干燥剂不断吸收土壤水分 ,研究氨挥发与土壤水分散失的关系。结果表明 ,在有干燥剂时 ,氨累积挥发量 (Y)与时间 (t)关系符合 Elovich动力学方程 ,与土壤水分散失呈显著正相关。对不同含水量进行比较 ,散失 1g水分所引发的平均氨挥发量在土壤水分含量为 80 g/ kg时最高 (0 .0 6 0 6 m g/ g) ,水分散失引发氨挥发的极值时间出现在试验第 5天。

Research on relationship between volatilization of ammonia and evaporation of soil water

The relationship between volatilization of ammonia and evaporation of soil water was studied by using desiccant to absorb water in soil in the text.The results showed that the quantity of ammonia was positively correlated with soil water content when there was desiccant in tub,and the relationship between the total quantity of ammonia-volatilizing (Y) and the time (t) could be expressed as Elovich equation (Y=a bln t).The average quantity of ammonia-volatilizing by evaporation of 1g soil water was the largest when the water content was 80 g/kg.The maximum rate of ammonia-volatilizing was in the fifth day.