| 摘要: |
| 油茶尺蛾(Biston marginata Shiraki )是近年来广东省中山市阔叶混交林内出现的重要害虫。通过对油茶尺蛾幼虫在林间的空间分布调查和抽样方法的研究，结果表明：7种抽样调查方法均可用于油茶尺蛾幼虫密度的调查，其中Z字形法为最佳的抽样方法。坡位、坡向、树种和树冠方位对幼虫的分布有显著影响。上坡的显著高于中坡和下坡的幼虫密度；南坡的显著高于其它坡向的幼虫密度。油茶尺蛾幼虫在林间的理论分布符合负二项分布，空间分布属聚集分布，个体间相互吸引，分布的基本成分为个体群。以Iwao回归模型为基础，确定了不同虫口密度下的最适抽样模型。 |
| 关键词: 油茶尺蛾，空间格局，抽样技术 |
| DOI： |
| 分类号: |
| 基金项目:中山市财政资助的中山市林业科研与推广的自立项目 |
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| The Spatial Distribution Pattern and Sampling Technique of Biston marginata Shiraki |
|
Li Yizhen
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| Abstract: |
| Biston marginata Shiraki was an important pest of broad-leaved and broad-leaved mixed forests in Zhongshan city of Guangdong province in recent years. The distribution-model and sample methods were reseached . The results showed that seven kinds of sample methods can be used to investigate the larvae population density, and the Z-shaped method was found to be the best.The population density of the larvae was significant difference among different position of the mountain,or different kinds of trees,or different position,of a tree crown. The larvae population density on the top or on the southern slope of the mountain were largest among different position of the mountain.The spatial patterns of the larvae in the plantation were conformed to negative binomial distribution. The distribution of the larvae exhibited an aggregation pattern. Their Iwao regression equation showed that the larva on the trees was mutual attraction, and the distribution of the basic ingredients was the individual group. The sampling quantity model of the larvae was presented on the base of the Iwao’s model. |
| Key words: Biston marginata Shiraki,spatial pattern,sampling method |
