松阿扁叶蜂4龄幼虫期空间分布型的研究  

Spatial distributional patterns of 4-age larva of Acantholyda posticalis

作　　者：杨维宇 陈国华 张英伟 赵彦荣 黄凤玉 王连荣 范志丽 包才 

机构地区：[1]抚顺市森防检疫站,辽宁抚顺113006 [2]抚顺市大伙房实验林场,辽宁抚顺113106

出　　处：《辽宁林业科技》2004年第4期1-3,9,共4页Liaoning Forestry Science and Technology

摘　　要：采用聚集指标法、幂指数法及m - x回归检验的测定,探讨了松阿扁叶蜂4龄幼虫期在林间树冠不同部位的空间分布型。结果表明,该虫在林间的整株树冠上及不同方位、不同层次上均属聚集分布。用Bliachith提出的聚集均数来测定聚集原因,当λ<2时,聚集的主要原因由环境条件引起,当λ≥2时,除受环境影响外,还与成虫的产卵行为有关。把树冠内幼虫平均数与树冠各方位、各层次的幼虫均数进行回归分析,结果是密切相关,而树冠北面下层更具代表性,可代表整株作为最适抽样部位。Spatial distributional patterns of 4-age larvae of Acantholyda posticalis in different positions of crowns in forests were studied by using collective indicator methods, power index methods and determination of m~- regression test. The results showed that: larvae distributed collectively in crowns, different positions and layers. Gathering causes were measured by gathering averages put forth by Bliachith. Major causes of gathering were environmental conditions when λ<2; besides influenced by environment, gathering was related to egg laying behaviors of imagoes when λ≥2. Regression analysis of averages of larvae in crowns with each directions and layers of crowns were conducted, the results showed a closely correlativity, and down-layers of northern side in crowns was of representative, and might represent the tree as optimum sampling position.

关 键 词：松阿扁叶蜂 幼虫期 空间分布型 红松林 

分 类 号：S763.43[农业科学—森林保护学]