| 农田防护林结构特征与作物产量关系的探讨 |
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| 引用本文： | 王忠林.农田防护林结构特征与作物产量关系的探讨[J].陕西林业科技,1991(2):49-52. |
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| 作者姓名： | 王忠林 |
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| 作者单位： | 西北林学院 |
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| 摘 要： | 农防林的结构特征与作物产量关系密切。南北走向的农防林增产效益高于东西走向的农防林,作物的增产效益、防护面积随单位农防林地面积冠幅、冠体、密度、林木平均高度的增加呈单峰曲线变化,农防林占地比率呈凹曲线变化。作物增产率最高、农防林占地比率最小、防护面积最大时,相应的最适农防林单位面积林地冠幅为2～4m~2/m~2,冠体4～6m~2/m~2,林木密度0.1～0.2株/m~2,林木高度8～20m。
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| 关 键 词： | 农田防护林 结构 增产效益 |
STUDY ON RELATIONSHIPS BETWEEN SHELTERBELT STRUCTURE AND CROP YIELD IN WEIBEI DRY PLATEAU |
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| Wang Zhonglin Northwestern College of Forestry.STUDY ON RELATIONSHIPS BETWEEN SHELTERBELT STRUCTURE AND CROP YIELD IN WEIBEI DRY PLATEAU[J].Shaanxi Forest Science and Technology,1991(2):49-52. |
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| Authors: | Wang Zhonglin Northwestern College of Forestry |
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| Institution: | Wang Zhonglin Northwestern College of Forestry |
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| Abstract: | |
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| Keywords: | Shelterbelt Yield inceasing benefit |
| 本文献已被 CNKI 维普 等数据库收录！ |
