摘要
梭梭直播造林成功率很低，是急待解决的问题。主妇的限制因子是：风沙危害和鼠虫危害，针对这些问题，在直播造林中试用了地膜覆盖技术，结果表明：地膜覆盖具有减少干沙层厚度，提高土壤含水量，改善温度状况作用。并且能够防止鼠虫危害。出苗率大大提高，从覆盖前的２０％提高至覆盖后的９７．６％。
It was impatient to solve the low survival rate of direct seeding. There were manylimited factors sucb as: damage of wind and sand and bite of insect pest and rat.We appliedthe polyethylene film cover to prevent from thore damage in direct seeding of cakcayr.Theresults showed that the method has some effects:reduction of dry sand layer in deep;preser-vation of moistare content;improving of temperature conditions and protetion from insectpest and rat-bite. The survival rate of dired seeding was promoted from 20% to 97.6% be-fore and after cover.
关键词
梭梭
地膜复盖
直播造林
Carcayr
Polyethylene film cover
Direct seeding
