Effect of HCO3-on growth of wheat seedling and metabolism actived oxygen under different supply level of zinc EFFECT OF APPLICATION OF FERTILIZER NITROGEN,ZINC AND SELENIUM ON ZINC NUTRITION OF RYEGRASS Effects of znic nutrition on endogenous hormone and free radicals in spring maize Inhibition of high Mg concentration on seedling growth, free radical metabolism of reactive oxygen and zinc nutrition of maize in saline fluvo-aquic soils Genetic analysis of Zn-efficient nutrition characteristic of rice at different Zn2+ activities Effects of zinc on the fruits‘ quality of two eggplant varieties