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本试验采用室内模拟的方法,探讨氯化铵在上海郊区三种主要土壤上的硝化、挥发农业化学(以下简称农化)特性。结果表明:氯化铵在不同土壤上的硝化率,挥发量均以夹沙泥最高,沟干泥次之,青紫泥最低,且硝化和挥发进程可用经验方程Y=A·T~B表示;氯化铵入土后具有较高的稳定性;氯化铵中氯离子能一定程度地抑制土壤硝化微生物的活性,与尿素混施可延缓尿素的硝化率。
In this study, indoor simulation method was used to investigate the nitrification and volatile agrochemical (hereinafter referred to as agrochemical) characteristics of ammonium chloride on three main soils in Shanghai suburbs. The results showed that the rates of nitrification and volatilization of ammonium chloride in different soils were the highest in sand-holding, the second in ditches and the lowest in brucite. The nitrification and volatilization processes were represented by the empirical equation Y = A · T-B. Ammonium chloride has higher stability after being in the soil. Chloride ion in ammonium chloride can inhibit the activity of soil nitrifying microorganisms to a certain extent. Mixing with urea can delay the nitration rate of urea.