| 马尾松毛虫的空间分布型及抽样方法研究 |
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| 引用本文： | 谢维辉,叶新峰.马尾松毛虫的空间分布型及抽样方法研究[J].华南农业大学学报,1993,14(4):89-94. |
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| 作者姓名： | 谢维辉 叶新峰 |
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| 作者单位： | 华南农业大学林学院
(谢维辉，苏星，卢川川，李奕震)，肇庆市林业局
(叶新峰)，封开县林业局
(彭国林)，封开县林业局(李锦波) |
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| 摘 要： | 本文运用聚集度指标法，回归模型法和频次分布法研究了马尾松毛虫越冬代幼虫的空间分布型。结果表明幼虫的分布型符合聚集分布。低密度情况下的幼虫服从Ｎｅｙｍａｎ Ａ型分布，幼虫在单株树上的分布服从负二项分布，各轮枝层虫口密度差异显著，可将其划分为３组。比较６种不同的抽样方法，以Ｚ字形法为最好。抽样数量以２４侏为宜。
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| 关 键 词： | 马尾松毛虫 空间分布型 抽样方法 |
STUDIES ON THE SPATIAL DISTRIBUTION PATTERNS OF PINE CATERPILLAR (Dendrolimus pumctatus Walker)AND SAMPLING METHODS |
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| Xie Weihui Su Xing Lu Chuanchuan Li Yizhen.STUDIES ON THE SPATIAL DISTRIBUTION PATTERNS OF PINE CATERPILLAR (Dendrolimus pumctatus Walker)AND SAMPLING METHODS[J].Journal of South China Agricultural University,1993,14(4):89-94. |
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| Authors: | Xie Weihui Su Xing Lu Chuanchuan Li Yizhen |
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| Institution: | Xie Weihui Su Xing Lu Chuanchuan Li Yizhen(College of Forestry .South China Agr. Univ. )Ye Xinfeng Peng Guolin Li Jinbo(Forestry Bureau of Zhaoqing )(Forestry Bureau of Fengkai county) |
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| Abstract: | The spatial distribution patterns of overwintering larvae of the pine caterpillar were studied by means of index of aggregation regression modle and frequency distribution. The result showed an aggregation distribution pattern for the larvae. Under low population density the distribution of the larvae obeyed Neyman distribution. In a single pine tree the larvae exhibited negative binomial distribution. The larval density between verticillate branches varied greatly and it should be divided into three groups. Different sampling methods were compared and the Z-shaped method found to be the best. The number of trees form which we took samples for survey was 24. |
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| Keywords: | Pine caterpillar Spatial distribution pattern Sampling method |
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