李园桃蚜和草间小黑蛛种群空间格局的地学统计学研究

利用地学统计学的原理和方法分析了李园桃蚜种群和草间小黑蛛种群的空间结构和时间相关性.结果表明,桃蚜种群6月27日和11月22日此两次的半变异函数拟合模型为直线,表明此两次两种空间分布为均匀分布或随机分布,其余9次半变异函数拟合模型均为球形,表明此9次李园桃蚜种群的空间分布是聚集分布,变程RSD(m)为4.173903～34.7837.草间小黑蛛空间格局5月21日、5月31日及10月19日、11月22日4次半变异函数拟合模型为直线,表明此4次种群的空间分布为均匀分布或随机分布,其余8次半变异函数拟合模型均为球形,表明此8次李园草间小黑蛛种群的空间分布是聚集分布,变程RSD(m)为2.3169～42.00711,表明草间小黑蛛种群对桃蚜种群在空间位置上具有追随关系,对其种群数量的控制有较大作用.

Geostatistics analysis on spatial patterns of Myzus persicae and Erigonidium graminicola in plum orchard

Investigations on the spatial construction and distribution of Myzus persicae and Erigonidium graminicola in a plum orchard were conducted from March 2003 to November 2003.The results indicated that the semivariogram of Myzus persicae could be described by spherical model,except on June 27 and November 22,which should be described by lined model,and that of Erigonidium graminicola could be described by spherical model,except on May 21,May 31,October 19 and November 22,which should be described by lined model.It could be concluded that the amount and spatial distribution of Erigonidium graminicola was closely related to those of Myzus persicae.