| 桑天牛自然种群生命表的初步研究 |
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| 引用本文： | 黄大庄,阎浚杰,阎晔辉,纪殿荣
,王志刚.桑天牛自然种群生命表的初步研究[J].河北林果研究,1993(2). |
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| 作者姓名： | 黄大庄 阎浚杰 阎晔辉 纪殿荣 王志刚 |
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| 作者单位： | 河北林学院经济林系，河北林学院经济林系，河北林学院经济林系 |
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| 摘 要： | 毛白杨幼林地桑天牛主要死亡因子为:卵寄生蜂寄生、啄木鸟啄食和林木折断或枯死后影响其生长发育等。经过一代自然种群生命表初步研究,结果其种群趋势指效为3.84.
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| 关 键 词： | 幼林地 桑天牛 生命表 |
PRELTMINARY STUDY ON LIFE TABLE OF APRIONA GERMARI NATURAL POPULATIONS |
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| Huang Dazhuang,Yan Junjie,Yan Yehui.PRELTMINARY STUDY ON LIFE TABLE OF APRIONA GERMARI NATURAL POPULATIONS[J].Hebei Journal of Forestry and Orchard Research,1993(2). |
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| Authors: | Huang Dazhuang Yan Junjie Yan Yehui |
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| Institution: | Hebei Forestry College |
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| Abstract: | In this paper, the main causes for the death of Apriona germari in Populus tomentosa plantations as parasitical wasp harming, woodpecker eating and break or dead of trees, are discussed. Life table studies with its natural population of one generation show that the tendency index of its population is 3.84. |
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| Keywords: | plantations Apriona germari life table |
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