草地学报

›› 1997, Vol. 5 ›› Issue (2): 108-112.DOI: 10.11733/j.issn.1007-0435.1997.02.006

• 研究论文 • 上一篇    下一篇

狭翅雏蝗种群动态的模糊聚类分析

刘长仲, 冯光翰   

  1. 甘肃农业大学植物保护系, 兰州 730070
  • 出版日期:1997-05-15 发布日期:1997-05-15
  • 基金资助:
    农业部“八五”攻关课题

Fuzzy Cluster Analysis of The Population Dynamics of Chorthippus dubius (Zubovsky)

Liu, Changzhong, Feng Guanghan   

  1. Department of Plant Protection, Gans Agricultural University, Lanzhou 730070
  • Online:1997-05-15 Published:1997-05-15

PDF

摘要： 本文作者用平均密度(M)、聚集度指标(M*/M)、有虫样方出现频率(F),对狭翅雏蝗在草原的种群动态进行了模糊聚类分析。结果表明,狭翅雏蝗发生的动态规律可分为四个状态集。其中发生在前期末既是预测预报的关键时期,也是药剂防治的有利时机。

关键词: 狭翅雏蝗, 种群动态, 模糊聚类分析

Abstract: Fuzzy cluster analysis was carried out.with the data of mean densities, indices of patchiness and rates of occupied plot in different periods of Chorthippus dubius (Zubovsky)which damaged rate of occupied plot dominantly on Ganjia high mountain grassland in Xiahe County, Gansu province.The periods of its population dynamics was studied.The results showed that the population dynamics of this grasshopper could be divided into four distinct periods, in which the second one, the young nymph stage, was the key time for population prediction and chemical control.

Key words: Chorthippus dubius, Population dynamics, Fuzzy cluster analysis