青杨是青海省营造山地农田林网的主要树种。
Populus cathayana is the main species to plant farmland forest net work in Qinghai province hill .
农田林网区土壤贮水量在生长季总体上比林网外对照提高2.2%。
Soil water storage of farmland shelterbelt region increases 2.2% than CK in growing season.
主要观测护田林带对农田小气候的影响、林带的排水作用以及改土效果。
The major observation items are the effect of the belt to the small range climate of the farmland, drainage and soil improving functions of the belt.
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