Distribution of zinc in soil-crop system after long-term located application of zinc fertilizer
长期定位施锌土壤-作物系统锌分布特征研究

A long term located experime nt of application of zinc fertilizer is conducted to study the distribution of Zn in soil crop system. Th e results show that zinc can be accumulated in soil after long ter m continuous application o f zinc fertilizer, the available zinc concentration in soil is enhanced, which i s higher than the critical value for assess whether Zn deficiency is occured or not .H igh zinc concentrations in crops and different tissues are observed owing to con tinuous application of zinc, but their distributions are different. Zinc is accu mulated in soil after a long term continuous application of zinc and zinc amount carried out by the crop is only 4.11% of the applied amount. So, it makes a potential risk for soil ecosystem.