介绍了苏联化学加工树木绿冠的研究方向。
Finally this paper introduced the research direction of chemical utilization of green crown of tree in USSR.
杉木绿冠的石油醚提取物得率，为其绝干重量的5．4％。
The yield of petroleum ether extractives from the crowns of C. lanceolata was 5 4% of its dry weight.
通过分析平面绿量效率这一指标，客观地说明了一些具有高叶面积指数、冠幅较大速生落叶大乔木应是遮荫树主体。
By analyzing the efficiency of LVV_H, it objectively illustrated that the tree with lager crown and higher LAI was the preference for shading.
通过分析平面绿量效率这一指标，客观地说明了一些具有高叶面积指数、冠幅较大速生落叶大乔木应是遮荫树主体。
By analyzing the efficiency of LVV_H, it objectively illustrated that the tree with lager crown and higher LAI was the preference for shading.
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