油茶尺蛾幼虫空间分布格局及抽样技术的研究分析.docVIP

个人收集整理 仅供参考学习 个人收集整理 仅供参考学习 PAGE / NUMPAGES 个人收集整理 仅供参考学习 油茶尺蛾幼虫空间分布格局及抽样技术地研究 陈志云1王玲1陈亮2陈嘉杰3李东文1李奕震4 (1.中山市森林病虫害防治检验站 中山 528403；2.中山市林业局；3. 中山市林场；4.华南农业大学林学院)b5E2RGbCAP 摘要近年来，油茶尺蛾(Biston marginata Shiraki )已成为广东省中山市阔叶混交林地重要害虫.通过对油茶尺蛾幼虫在林间地空间分布格局和抽样方法地研究，结果表明：7种抽样调查方法均可用于油茶尺蛾幼虫虫口密度地调查，其中Z字形法为最佳地抽样方法.坡位、坡向、树种和树冠方位对幼虫地分布有显著影响.上坡地幼虫密度显著高于中坡和下坡；南坡地幼虫密度显著高于其它坡向.油茶尺蛾幼虫在林间地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，分布地基本成分为个体群.以Iwao回归模型为基础，确定了最佳地抽样模型.p1EanqFDPw 关键词油茶尺蛾，空间分布格局，抽样技术 TheSpatialDistributionPatternandSamplingTechniqueofBiston marginata Shiraki DXDiTa9E3d Chen Zhiyun1Wang Ling1Chen Liang2 Chenjiajie3Li Dongwen1LI Yizhen4RTCrpUDGiT （1.Forest Pest Management and Quarantine Station of Zhongshan City,Zhongshan，528403; 2. Forestry Bureau of Zhongshan City; 3.Zhongshan Forest Farm;4.College of Forestry，South China Agricultural University,Guangzhou）5PCzVD7HxA AbstractBiston 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-modeland sample methods were reseached . The results showed that seven kinds of sample methods can be used to investigate the larvaepopulation 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 larvaepopulation density on the top or on the southern slope of the mountain were largestamong different position of the mountain.The spatial patterns of the larvae in the plantation were conformed to negative binomial distribution. The distribution of the larvaeexhibitedan aggregationpattern.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 thelarvaewas presented on the base of the Iwao’s model.jLBHrnAILg Key Words Biston marginata Shiraki，spat