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杨树是我区农田林网、速生丰产林和“四旁”植树的主要树种。发展杨树集约栽培,提高其生长率和单位面积生长量,是林业生产重要任务之一。按照自然规律合理划分林地的生产力等级,是集约经营森林的基础,是林业规划设计、土地利用、制定林木产量、产值预测预报的依据,是当前林业生产中急待解决的重要课题。
Poplar is my area farmland nets, fast-growing high-yield forest and “around” the main tree species. It is one of the important tasks for forestry production to develop intensive cultivation of poplar trees and increase their growth rate and unit area growth. According to the laws of nature, the rational classification of forest productivity is the basis for intensive management of forests. It is also the basis for forestry planning and design, land use, forest yield and forecasting. It is an urgent issue to be solved urgently in forestry production.