平凉地区旱地玉米覆盖栽培硫酸锌施用技术

研究总结出玉米喷施硫酸锌最佳用量为 3.0 0 kg/ hm2 ,拌种最佳用量为 2 5 .4 g/ kg,其中拌种用量远远大于资料介绍的 4～ 6g/ kg的界限 1] 。硫酸锌的增产效果为 :基施 (10 .5 %～31.5 % ) >拌种 (17.7% ) >喷施 (14.6% )。并应用模糊聚类法对 4年 2 8点次旱地覆盖栽培玉米基施硫酸锌试验资料进行分析 ,得到了各类区的肥料效应方程式 ,利用各方程计算得到硫酸锌基施的最佳用量为 2 3.18～ 31.74 kg/ hm2 。

Techniques of Application Zinc Sulfate under Cover Conditions for Dry Land in Pingliang

The research show that both spray application zinc sulfate 3.00 kg/hm 2 and mixed seed application 25.4 g/kg have the best result.This amount of mixed seed application largely higher than information of reports that mixed seed application only need 4~6 g/kg.Adding zinc sulfate,the best method was that directly apply it into the soil(efficiency 10.5%~ 31.5%),next was mixed seed application(17.7%),the last was spray application( 14.6% ),using the Vayue assemble method,analysed the experiment information which has been done for 4 years and 28 point where directly apply the zinc sulfate into the soil of covering cultivation corn of dry land, and obtained the effect equztion of fertilizer from kinds of district.Calculating with equztion,amount of the best result of directly applying zinc sulfate was 23.18~31.74 kg/hm 2.