So the DCD was applied at various concentrations in different soils. The concentration of DCD mixed with AB was 0.5% in Purple soil, and it was 0.3% in Grey alluvial and Yellow soil.

• 同时提出DCD在3种土壤上的适宜添加量；紫色土上为普通碳铵施入量的0.；5%25；黄壤和灰潮土上为0