Study on Spatial Distribution Pattern of Thrip (Odentot hrips lati) on Alfalfa (Medicago sativa)  

紫花苜蓿蓟马的空间格局分析(英文)

作　　者：赵丽丽[1] 王普昶 刘玉良[3] 陈彦希[1] 

机构地区：[1]贵州大学动物科学学院,贵州贵阳550025 [2]贵州省草业研究所,贵州贵阳550006 [3]内蒙古农业大学,呼和浩特010019

出　　处：《Agricultural Science & Technology》2011年第7期990-993,共4页农业科学与技术（英文版）

基　　金：Supported by Natural Science Foundation of Guizhou Province(J[2010]2248)~~

摘　　要：[Objective] The aim of this study was to reveal and analyze the spatial distribution pattern of thrip（Odentot hrips lati） on alfalfa（Medicago sativa）.[Method] Within alfalfa plantation areas,experimental plots with the sizes of 10×10,10×20,10×30,20×30,20×40,20×80,30×30,30×40,30×50,40×40,40×50,40×80 and 50×50 m2 respectively were set up in the randomly selected sampling sites of 1 m ×2 m in size.During bud-emerging period and florescence period of alfalfa in the experimental plots,the number of thrips was counted and their distribution pattern was measured using XU Ru-mei＇s method.[Result] During bud-emerging period of alfalfa,the spatial distribution of thrips assumed an elliptic shape sized of 40×30-40×40 cm2 at horizontal level and that presented an ascending-falling trend of tress density down from the top at vertical level.During the florescence period of alfalfa,it showed a homogeneous distribution or randomly distributed pattern at horizontal level and a falling trend of tress density from the top to the apex to the root at vertical level.[Conclusion] Our results provide theoretical basis for field selection of insect-resistant alfalfa varieties.[目的]对紫花苜蓿蓟马的空间格局进行研究与分析。[方法]在紫花苜蓿种植区内随机取点,设置1×2 m2的样地,在样地内分别设置10×10、10×20、10×30、20×30、20×40、20×80、30×30、30×40、30×50、40×40、40×50、40×80、50×50 cm2尺度的样方,分别在紫花苜蓿现蕾期和开花期调查样方内蓟马数量,并利用徐汝梅等的方法进行空间格局测定。[结果]蓟马在紫花苜蓿现蕾期水平空间分布形状为尺度40×30 ×40×40 cm2的椭圆型,垂直分布表现为由枝条顶端向下密度先增多后又减少的特征;开花期为无性状均匀分布到随机分布的水平空间分布特征,垂直分布表现为由枝条顶端向下递减的特征。[结论]该研究结果为紫花苜蓿抗虫育种的田间选择提供了理论依据。

关 键 词：THRIPS Different degree Distribution pattern ALFALFA 

分 类 号：S541.9[农业科学—作物学]