| 树冠体积与赤松毛虫发生量的关系 |
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| 引用本文： | 张树林,李树奇,殷连永.树冠体积与赤松毛虫发生量的关系[J].河北林果研究,1992(4). |
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| 作者姓名： | 张树林 李树奇 殷连永 |
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| 作者单位： | 遵化县林业局
(张树林，李树奇)，遵化县林业局(殷连永) |
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| 摘 要： | 本文重点论述了树冠体积在赤松毛虫防治管理中的作用。根据冠幅、冠高确定树冠体积,从幼虫期食叶总量3323.17 cm得出树体最大载虫量,通过回归方程(?)(载虫量)=2.1016+27.1957x(树冠体积)可找出不同树冠体积对赤松毛虫的允许发生量。
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| 关 键 词： | 树冠体积 赤松毛虫 发生量 |
RELATION BETWEEN TREE CROWN VOLUME AND PERMISSIBLE AMOUNT OF DENDROLIMUS SPECTABILIS BUTLER OCCURED |
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| Zhang Shulin,Li Shuqi,Yin Lianyong.RELATION BETWEEN TREE CROWN VOLUME AND PERMISSIBLE AMOUNT OF DENDROLIMUS SPECTABILIS BUTLER OCCURED[J].Hebei Journal of Forestry and Orchard Research,1992(4). |
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| Authors: | Zhang Shulin Li Shuqi Yin Lianyong |
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| Institution: | Forestry Bureau of Zunhua County |
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| Abstract: | The relation between tree crown volume and permissible amount of Dendrolimus spectabilis Butler is discussed in this paper. The tree crown volume is determined by its radius and height, and the maximum permissible amount of insect can be calculated according to the leaf eating amount of 3323.17cm of a single larva. Therefore, the permissible amount of insect for a given crown volume can be determined aecording to the following regressional equation y = 2.1016 + 27.1957x , where y is permitted amount of insect, X is volume of tree crown. |
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| Keywords: | volume of tree crown Dendrolimus spectabilis Butler amount of insect |
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