The consistence of 0 5%, 0 3%, 0 3% is optimal respectively when the DCD is added in order to both hold up the loss and accelerate the transformation of NH 4 N in Purple, Yellow Soil and Aquent.

• 在紫色土、潮土和黄壤上添加DCD抑制NH4?N 损失和转化的效果分别以0－5 %25 、0－3 %25 、0－3 %25 浓度为最佳。