...孙旭红 宋文华 李荣花 刘爱华 - 现代城市研究 关键词： 经济林木； 环境建设； 城市绿化；[gap=375]Key words: economic forest; environmental construction; urban greening ...
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economic forest facility 经济林设施
Economic forest planting 经济林种植
Economic Forest Researches 经济林研究
Economic forest pathology 经济林病理学
Economic forest culture 经济林栽培学
Economic forest breeding 经济林育种学
The area ratio of protection forest and economic forest in forest land,thin stocked land and shrubbery land is about 34:1.
有林地、疏林地和灌木林地中防护林与经济林的面积比例约为34:1。
参考来源 - 基于RS和GIS的吴起县森林资源现状调查与分析3．The best efficiency is economic forest,the best zoology efficiency is mixed forest。
退耕还经济林的效益值最大，生态效益以还混交林为最好。
参考来源 - 荒漠内陆河流域退耕还林还草工程效益评价·2,447,543篇论文数据，部分数据来源于NoteExpress
Object: Landscape plants, forests, fruit trees and other economic forest.
对象：景观植物、森林、果树及其他经济林。
The best efficiency is economic forest, the best zoology efficiency is mixed forest.
退耕还经济林的效益值最大，生态效益以还混交林为最好。
Chestnut is one the important economic forest in mountain area in China. Its output is placed on the top of the world.
板栗是我国重要的山区经济林之一，产量居世界第一位。
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