• 研究报告 •

### 关于Taylor幂法则b值的不一致性问题讨论─—以菜蚜为研究事例

1. 浙江农业大学植保系, 杭州310029
• 收稿日期:1994-09-12 出版日期:1995-06-10

### Discussion on the Inconstancy of b Value in Taylor's Power Law with Special Reference to Veg-etable Aphids, Myzus persicae and Lipaphis erysimi

Wang Xingeng, Liu Shusheng

1. Department of Plant Protection, Zhejiang Agrcultural University, Hangzhou 310029
• Received:1994-09-12 Online:1995-06-10

Abstract: The coefficient b in Taylor's power law has been interpreted as an index of aggregation,with characteristic value for a given species, and indepondent of sampling environment.Systematic samplings of aphids on crucifer vegetables were carried out during 1985-1992 in the suburb of Hangzhou. The results of test showed that the estimated values of Taylor's b of the two aphids,Myzus persicae and Lipaphis erysimi were significantly interspecifically different.However for a given species,the b values were not constant among sampling populations in different environment. It should be pointed out that different sampling coverage may lead to the inconstancy of b.Therefore,cautions should be given in the use of b for explaining spatial behaviors or comparing interspecific difference of aggregation.