辣椒田蜘蛛混合种群空间分布型分析  

Spatial distribution of mixed spider populations in pepper fields

作　　者：王小强 曹馨月 刘虹玲 伍兴隆 蒲德强[1,3] 李跃建[4] 房超[4] WANG Xiao-qiang;CAO Xin-yue;LIU Hong-ling;WU Xin-long;PU De-qiang;LI Yue-jian;FANG Chao(Industrial Crop Research Institute,Sichuan Academy of Agricultural Sciences,Chengdu 610300,China;Tea Research Institute,Sichuan Academy of Agricultural Sciences,Chengdu 610066,China;Institute of Plant Protection,Sichuan Academy of Agricultural Sciences,Chengdu 610066,China;Horticultural Institute,Sichuan Academy of Agricultural Sciences/Vegetable Key Laboratory of Sichuan Province,Chengdu 610066,China)

机构地区：[1]四川省农业科学院经济作物育种栽培研究所,成都610300 [2]四川省农业科学院茶叶研究所,成都610066 [3]四川省农业科学院植物保护研究所,成都610066 [4]四川省农业科学院园艺研究所/四川省蔬菜重点实验室,成都610066

出　　处：《南方农业学报》2018年第11期2204-2209,共6页Journal of Southern Agriculture

基　　金：国家重点研发计划项目(2018YFD020082);四川省科技支撑计划苗子工程重点项目(18MZGC0224);四川省科技应用基础重点项目(18YYJC0468)

摘　　要：【目的】掌握辣椒田蜘蛛混合种群的空间分布,为控制辣椒田虫害并保护蜘蛛类群提供科学依据。【方法】通过五点取样法对辣椒整株上草间小黑蛛(Erigonidium graminicola)和拟环狼蛛(Lycosa pseudoannulata)进行调查,每点系统调查10株,应用2种回归方法和8个聚集度指标对蜘蛛混合种群调查数据进行统计分析,研究其空间格局;通过Iwao回归法和Taylor幂法则计算蜘蛛混合种群理论抽样数,以Iwao和Kuno序贯抽样技术拟合蜘蛛混合种群的序贯抽样模型。【结果】通过Iwao m*-m回归法得到α=0.517>0、β=1.089>1,Taylor幂法则得到a=1.616>0、b=1.071>1,表明蜘蛛混合种群呈聚集分布,聚集强度随种群密度的升高而增大,且个体间相互吸引,其聚集原因由环境因素引起;通过种群密度与聚集度指标相关性分析,发现平均拥挤度(m*)、丛生指标(I)、久野指数(CA)、扩散系数(C)、负二项分布指标(K)、田间个体平均大小(L*)及L*/(m+1)均能用以分析蜘蛛混合种群空间分布型;利用空间格局参数确定了理论抽样数和序贯抽样模型。【结论】辣椒田蜘蛛混合种群呈聚集分布,其聚集原因由环境因素引起。【Objective】The spatial distribution of mixed spider populations in pepper fields were studied to provide scientific basis for comprehensive control of the pest in pepper fields and protection of spider populations.【Method】The five points sampling method was used to investigate the Erigonidium graminicola and Lycosa pseudoannulata in the whole plant of pepper,and ten plants were investigated at each point.Two regression models and eight indexes of aggregation were used to analyze the data of mixed spider populations,and the spatial distribution patterns were studied.Meanwhile,Iwao’s regression and Taylor’s power law were used to calculate the theoretical sampling number of mixed spider populations,then Iwao’s regression and Kuno’s sequential sampling methods were used to fit the sequential sampling model of mixed spiders.【Result】Calculated by Iwao m*-m regression,α=0.517>0,β=1.089>1,and a=1.616>0,b=1.071>1 by Taylor power law.So the distribution patterns of spiders was in mixed population.Aggregation intensity increased with the increase of population density,and the individuals attracted each other.The aggregation was caused by environmental factors.The correlation between population density and aggregation indexes indicated that,mean crowding intensity(m*),clumping index(I),CA index(CA),diffusion coefficient(C),minus binomial distribution index(K),individual mean size in field(L*)and L*/(1+m)could explain the spatial distribution patterns of spiders of mixed population.Theoretical sampling number and sequential sampling model were determined by spatial pattern parameters.【Conclusion】The distribution pattern of spiders of mixed populations was in an aggregated distribution and aggregation is caused by environmental factors.

关 键 词：辣椒 蜘蛛 混合种群 分布型 抽样技术 

分 类 号：S476.9[农业科学—农业昆虫与害虫防治]