您的位置:首页  > 论文页面

柠条豆象卵及幼虫种群动态及空间分布研究

发表时间:2011-03-15  浏览量:1262  下载量:409
全部作者: 张大治,范玉婷,陈小蔚,贺达汉
作者单位: 宁夏大学生命科学学院;宁夏大学农学院
摘 要: 应用多个聚集度指标和Iwao, Taylor的回归分析方法,研究探讨柠条豆象卵、幼虫在宁夏盐池、灵武等11个样地的空间分布型。结果表明:该害虫的卵和幼虫在田间均呈聚集型的负二项分布。根据聚集均数(λ) 测定结果,分析聚集原因,这种聚集主要由环境因素引起。应用Iwao, Toylar等进行回归分析检验,回归模型的拟合效果良好,表明柠条豆象个体间相互吸引,分布的个体成分是个体群,且与密度有关,有密度依赖性,聚集强度随种群密度的升高而增加。
关 键 词: 生态学;柠条豆象;空间分布型;聚集度指标;为害率
Title: Studies on the population dynamic and spatial distribution pattern of egg and larvae of Kytorhinus immixtus
Author: ZHANG Dazhi, FAN Yuting, CHEN Xiaowei, HE Dahan
Organization: School of Life Science, Ningxia University; School of Agriculture, Ningxia University
Abstract: Some aggregation indices, Iwao and Taylor regression analysis methods were used to determine the spatial distribution pattern of egg and larvae of Kytorhinus immixtus in desert landscape of Ningxia. The results showed that the spatial distribution pattern of egg and larvae of K. immixtus fitted a negative binomial distribution and belonged to the aggregated distribution. The reason for the aggregation was analyzed according to estimation by mean aggregation (λ). The aggregation was caused by the environmental factors. Among the regression analysis, the linear related degree of Iwao and Taylor regression model was optimum. The aggregation intensity increased with density of population.
Key words: ecology; Kytorhinus immixtus; spatial distribution pattern; aggregation indices; damage rate
发表期数: 2011年3月第5期
引用格式: 张大治,范玉婷,陈小蔚,等. 柠条豆象卵及幼虫种群动态及空间分布研究[J]. 中国科技论文在线精品论文,2011,4(5):403-410.
 
0 评论数 0
暂无评论
友情链接