不同土壤耕层有效锌垂直分布特征研究

目的]研究吉林省3种不同土壤的耕层有效锌垂直分布及其影响因素。方法]采用模拟降水法研究了果园土、黑土及盐碱土不同耕层的有效锌垂直分布。结果]果园土、黑土、盐碱土的有效锌含量均以0～5 cm耕层最高且果园土0～5 cm耕层的有效锌含量高出近3倍;施肥区3种土壤的0～5 cm耕层有效锌含量高低依次为：黑土〉果园土〉盐碱土;随着施锌量的增加,0～5 cm耕层的有效锌含量迅速增加,施锌处理果园土、黑土、盐碱土的0～5 cm耕层有效锌含量分别为24.12、24.42和15.36 mg/kg;在1年降雨量的处理中,随着施锌量的增加,3种土壤各耕层的有效锌含量均有不同程度的增加,且盐碱土的有效锌含量增幅最大;不同土壤同耕层的有效锌增加量相比,盐碱土高于果园土和黑土。结论]该研究为锌肥的合理施用提供了依据。

Research on the Vertical Distribution Characters of Availability Zn in Different Plough Horizons

Objective]The purpose was to research the vertical distribution of available Zn in plough horizons of 3 different soils and its influencing factors.Method]The vertical distributions of available Zn in different plough horizons of orchard soil,black soil and saline alkali soil were researched by using simulated rainfall method.Result]Compared with the other plough horizons,the contents of available Zn in the plough horizons of 0-5 cm of orchard soil,black soil and saline alkali soil were highest and that ...