摘要
通过对福建南平西芹毛竹林防治和不防治标准地长期跟踪调查,采用Lloyd方法和谐波分析方法,对刚竹毒蛾种群(PantanaphyllostachysaeChao)在林间的空间格局动态进行研究,结果表明:刚竹毒蛾高密度下虫口趋于均匀分布,各世代种群聚集程度与虫口密度负相关,各代成虫产卵、低龄幼虫活动分散、高龄幼虫扩散是空间格局变动的主要原因,反映为空间格局的扩散周期为40d、70d、20d。
Based on the long term tracing investigation in the bamboo forest plots, the spatial distribution pattern of Patana plyllostachysae population was studied using the method of Lioyd and harmonic analysis.The results indicated that the population of P. phllostachysae tended to uniformly distributied when pest density was high in bamboo forests.The aggregatin degree of every generation was negatively related to the density of the pest. The reason of the variation was the of oviposition adults and the spread of larvae. The cycle of spatial distribution spread of the pest was 40d,70d and 20d respectively.
出处
《竹子研究汇刊》
2005年第2期19-22,共4页
Journal of Bamboo Research
基金
福建省自然科学基金资助项目(C97033).
