摘要
运用6项聚集度指标和2种回归方法对枇杷潜蛾幼虫的空间分布型及聚集原因进行分析。结果表明,该虫在任何密度下都呈聚集分布并遵从负二项分布,聚集原因是由某些环境因素所致,分布的基本成分为个体群;几种常见的抽样方法与全查比较,并进行差异性显著测验,表明5点式为最佳抽样方法;通过分析并拟合出枇杷潜蛾幼虫在枇杷园中的最适理论抽样数模型和序贯抽样模型。
The spatial pattern of Lyonetia eriobotryae larvae was examined by six indices of aggregation and two regression models,which indicated that the distribution of the larvae in the fields belong to the aggregate pattern at any density.The aggregation was caused by some environmental factors.The larvae occurred as individual groups and the individual was aggregated.Five point and style of ＂Z＂were both best methods compared with several normal sampling methods with examined all trees by significant difference test.The best sampling quantity model in different larvae density and sequential sampling model were constructed based on the above methods analysis.
出处
《西南农业学报》
CSCD
2007年第5期1016-1019,共4页
Southwest China Journal of Agricultural Sciences
基金
云南省科技厅基金项目(项目编号:2004TZ05)
关键词
枇杷
枇杷潜蛾
空间分布型
抽样技术
Eriobotrya japonica
Lyonetia eriobotryae
spatial distribution patterns
sampling techniques
