摘要
采用理论频次拟合及lwao（1968～1977）的m～m回归方法和聚集强度指标测定稻苞虫Parnava guttata Br.et Gr虫苞的空间格局,并对不同抽样方法进行精度比较和用序贯抽样法进行田间抽样数目测定。结果表明三代稻苞虫虫苞在田间基本上是奈蔓A型分布,也符合负二项分布;虫苞在低密度下,分布的基本成分是疏松的群体,高密度下是聚集的,个体内的分布是随机的;抽样方法:以棋盘式最佳,高密度时也可采用平行跳跃式。
This pater deals with the spatial pattern of the parcels of the rampant generation of the rice skipper, Parnaro guttata Bremer et Grey, in hybrib rice producing area of Zhongjiang County, Sichuan.
The spatial Pattern of paracel of rice skipper was analyzed by theory frequency recommendation and means of Iwao's method of mean crowding(m) on mean density(m), assemble intensity indices from data obtained. All sampling methods were comparedoof accuration degrees and be used sequential sampling with those indices in the field. The results showed that the spatial pattern of rice skipper fits of the Neman-A aggregation and fits to keeing with negative distribution, too. In the low density of parcels, the basic compositions of the partition was loose colony, in high density, it was assemble. In the colony, the particle was random. For the sampling method, the chessboard type was the best, when the density was high, the parallel jump type could be adopted.
出处
《西南农业学报》
CSCD
1990年第3期65-71,共7页
Southwest China Journal of Agricultural Sciences
关键词
稻苞虫
虫苞
空间格局
序贯抽样
Parnara guttata Bremer et Grey, Parcel, Spatial pattern, Sequential sampling.
