One incubation and two leaching experiments were conducted to investigate the effect of supplied element sulphur (S0) and DCD on leaching loss of NO3-from vegetable soil, and nitrification of soil NH4+.

• 本研究通过室内土壤培养和温室盆栽淋洗试验，对元素硫(S~0)、双氰胺(DCD)及其组合对不同性质的两种蔬菜地土壤NH_4~+硝化，NO_3淋溶损失和土壤无机氮含量、pH的影响及其作用机理进行了研究。