地膜覆盖提高枣树根蘖苗成活率试验

通过地膜覆盖可增加土壤温度，显度，促进枣树提前萌芽和集中萌芽，从而显著提高枣树根蘖苗栽植成活率，其中尤以全封闭地膜效果最佳，成活率可高达８８．６％，其次是露枝覆盖。同时，地膜覆盖呆明显促进地上部的加长生长和加粗生长，以及地下部新根的生长和发育，为根蘖苗后期的生长提供了有利条件。

Experiment of Increasing Jujube Sucker Survival with Plastic Covering

Through increasing soil temperature, soil moisture, and promoting jujube bud development in early stage and bursting in short period, plastic covering can increase obviously the survival rate of jujube suckers,and the best result, survival rate is high to 88. 6 %, is achieved in entire plastic covering treatment, then the shoot exposure covering treatment. Meanwhile, height growth and diameter growth, the growth and develop-ment of new root are promoted remarkably by plastic covering. It provides a favorable condition for the sec-bndary growth of suckers on later period.