西藏砂生槐林地豆荚螟幼虫空间分布格局  

The Spatial Distribution Model of Etiella zinckenella Larvae in Sophora moorcroftiana of Tibet

作　　者：王文娟[1] 方江平[1] 刘一岑 汪波 

机构地区：[1]西藏农牧学院,西藏林芝860000 [2]银川景弘景观绿化设计有限公司,宁夏银川750021

出　　处：《河南农业科学》2010年第9期83-87,共5页Journal of Henan Agricultural Sciences

基　　金：国家自然科学基金项目(30760045);国家科技支撑计划项目(2006BAC01A04)

摘　　要：应用不同的聚集度指标、Taylor幂法则、Iwao法,测定和分析了豆荚螟幼虫在砂生槐林地和植株内的空间分布格局。结果表明,豆荚螟幼虫在砂生槐林地和植株内均呈聚集分布,分布的基本成分为个体群,而且个体间相互吸引。在砂生槐植株内的水平方向上,以南向的平均虫口密度最大,聚集度最高,北向的虫口密度最小,聚集度最低,各方向间差异未达显著水平;在砂生槐植株的垂直方向上,以上层的平均虫口密度最大,聚集度最高,各层次间差异未达显著水平。The spatial distribution model of Etiella zinckenella larvae in Sophora moorcroftiana field were studied by different aggregated indices,Iwao＇s way and power law of Taylor.The results showed that the spatial distribution models of Etiella zinckenella larvae were all aggregation distribution not only in Sophora moorcroftiana field but also in Sophora moorcroftiana indivi-dual.The basic composition of the distribution was individual population and the different individual had mutual affinity with each other.In the horizontal direction of Sophora moorcroftiana plant,the average larvae density and the aggregation indices reached maximum in the south and the average larvae density as well as the aggregation indices reached the minimum in the north.There was no significant difference in directions.In vertical direction of Sophora moorcroftiana plant,the average larvae density and the aggregation indices reached maximum in the upper part and there was no significant difference in plant layers.

关 键 词：砂生槐 豆荚螟 幼虫 空间格局 

分 类 号：S793[农业科学—林木遗传育种]