| 宁夏银北二代林网主要害虫空间格局及其应用 |
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| 引用本文： | 周嘉熹 孙长春. 宁夏银北二代林网主要害虫空间格局及其应用[J]. 陕西林业科技, 1996, 0(4): 22-27 |
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| 作者姓名： | 周嘉熹 孙长春 |
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| 作者单位： | [1]西北林学院 [2]石咀山市政府 |
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| 摘 要： | 通过聚集指标法对宁夏银北地区二代林网中主要发生的枝梢害虫，光肩星天牛幼虫，木蠹蛾幼虫三类害虫进行测定，得知该三类害虫均呈聚集分布。通过Ｍ－Ｘ回归法，确定出理论抽样数和量大抽样量公式。并列出了天牛序贯抽样分析表。
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| 关 键 词： | 混交林 空间格局 分布型指数 序贯抽样 害虫 |
SPATIAL DISTRIBUTION OF THE MAIN INSECT PESTS OCURRING IN THE FOREST NETS OF SECOND GENERATION IN YINCHUAN AREA IN NINGXIA PROVINCE |
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| Zhou Jiaxi,Shao Chongbin,Wei Jianing,Xu Xiaojun. SPATIAL DISTRIBUTION OF THE MAIN INSECT PESTS OCURRING IN THE FOREST NETS OF SECOND GENERATION IN YINCHUAN AREA IN NINGXIA PROVINCE[J]. Shaanxi Forest Science and Technology, 1996, 0(4): 22-27 |
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| Authors: | Zhou Jiaxi Shao Chongbin Wei Jianing Xu Xiaojun |
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| Abstract: | There has been no reports on the studies of pests interpopulation in mixed stands.The populations of Eulecanium kuwana and Parthenolecanium orientalis,Anoplophora glabripennis and the larvae of Cossus orientalis occurring in the forest nets of second generation in Yinchuan area,Ningxia province were measured by aggregation index method.It was found that the populations of these three insect pest showed aggregation distribution.The number of theoretic sampling and the formula of maximum sampling sas established by M-X regressional method.Ananalytical table of seqtlential sampling for longicorn was given,which provides scientific basis for the control of pest insects occuring in the forest nets of second generation.in Ningxia. |
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| Keywords: | Mixed stand Mixed population Spatial distribution Distribution index Sequential sampling |
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