摘要
将苹果树分为 1 8个区 ,研究每个区立体空间中的昆虫群落结构。结果表明 :苹果树中昆虫 (及螨类 )共有 2 7种 ,其中植食性害虫 1 5种 ,种数占总量的 5 5 .5 6% ,天敌昆虫 1 2种 ,占 44.44% ;昆虫群落在树上、下、中及内外层差异大 ,而在东、南、西、北 4方位上差异小。通过频次比较的方法与χ2 检验得出 :梨星毛虫、山楂叶螨、顶梢卷叶蛾均符合负二项分布 ;采用聚集指标法计算得出 :梨星毛虫、山楂叶螨、顶梢卷叶蛾均为聚集型分布 ,另外 ,山楂叶螨的 I值最大 ,聚集度最高。
Certain apple tree was divided into 18 particular area to study the spatial structure of insect community.The result shown that:(1) there were 27 different kinds of insects ,besides mites ,among those there were 15 kinds of phytophagous of insects,accounts 55.56% in total amounts,others were 12 kinds of beneficial insect was ,and 44.4%; (2)there were more divergent of insect community on the above,below,middle inside and outside than that on the four position of east ,west ,south and north.By the means of frequency compare and χ 2 test,Illiberis pruni Dyar,Tetrangchus viennensis Zacher and Spilonota lechriaspis Meyrich accord with Negative Binomial Distribution;while by the target of assembly Illiberis pruni Dyar,Tetrangchus viennensis Zacher and Spilonota lechriaspis Meyrich belong to the Assembly Distribution,at the same time,the I value of Tetrangchus viennensis Zacher was the maxism and the degree of assembly was also the hightest.
出处
《西北农业学报》
CAS
CSCD
2002年第1期53-56,共4页
Acta Agriculturae Boreali-occidentalis Sinica
关键词
苹果树
昆虫群落
空间结构
Insect community
Spatial structure
Apple trees
