摘要
应用Iwao m*-m回归模型分析了草原蝗虫混合种群蝗蝻、成虫空间分布型,结果表明:蝻期空间格局呈聚集分布,在个体聚集群中个体间相互排斥,Iwao回归模型为m*=-0.18856+1.04154m,平均拥挤度与平均密度相关性极显著;成虫期个体间相互吸引,分布的基本成分为个体群,混合种群空间格局为均匀分布。建立了一定防治指标(mc)下的Iwao序贯抽样图、一定精度下的Kuno序贯抽样图及复序贯抽样图,从而为草原蝗虫混合种群抽样调查提供一定帮助。
Based on Iwao m＊-m regression model,the spatial pattern of grassland nymph and adult of locusts of mixed population were analyzed.The results showed that the spatial pattern of nymph was aggregation distribution,but the individuals repelled one another,the regression equation of mean crowding （m＊） and mean density （m） of nymph stage was m＊ =-0.18856＋ 1.04154m,with a very high correlation coefficient（R=0.9962）.The spatial pattern of mixed population at adult stage showed common even distribution,the basic component of distribution was individual colony,and they attracted each other.Iwao sequential sampling figure,Kuno sequential sampling figure and complex sequential sampling of the mixed population were finished under fixed action threshold （mc=9/0.25m2）,required value （Do=0.1,0.125,0.15） accordingly.It was helpful to sample investigation of grassland locusts of mixed population.
出处
《中国草地学报》
CSCD
北大核心
2013年第6期92-97,共6页
Chinese Journal of Grassland
基金
公益性行业(农业)科研专项(201003079)
甘肃省农牧厅"肃南县草原蝗虫综合治理技术研究"项目
关键词
蝗虫
混合种群
空间格局
时序动态
序贯抽样
Locust
Mixed population
Spatial pattern
Time dynamic
Sequential sampling
