土壤镍的临界浓度初探

inquiry the Ni Critical Concentration

镍对小白菜种子萌发的抑制浓度是15ppm以上;对营养液水培幼苗的抑制浓度是5ppm以上;土培时的抑制浓度为20mgNi/kg以上的投加量,所对应的土壤有效Ni为6mg/kg。

The Ni concentration inhibiting the germination of Brassica chinensis was≥15 ppm in water solution. The Ni concentration inhibiting seedling of that was≥5ppm in Hogland' solution. In soil pot experiment the Ni inhibited the growth of that was addition to≥20mg/kg of soil, which corresponding to the available Ni of a neutral purple soil was≥6 mg/kg.