麦田蜡烛草生态经济阈值研究  

Research on Ecological Threshold of Phlenm paniculatum Huds. in Wheat Field

作　　者：朱良备[1] 宋爱颖[1] 

机构地区：[1]安徽省萧县植保站,安徽萧县235200

出　　处：《现代农业科技》2012年第18期112-113,共2页Modern Agricultural Science and Technology

摘　　要：进行不同密度的蜡烛草对小麦产量影响的田间试验,结果表明:小麦产量损失率与蜡烛草密度的最佳回归模型为韦布尔函数Y=a×{1-(1/(exp[(x-b)d/c])}。其中,a=73.212 1,b=9.623 8,c=503.850 1,d=1.018 3。蜡烛草的经济危害允许水平为3.98%,防除阈值为39.3株/m2。Different densities of Phlenm paniculatum Huds.for wheat yield were studied, the results showed that the best regression model of wheat yield loss and Phlenmpaniculatum Huds. density for the Weibull Function was Y=a×{1-（1/（exp[（x-b）d/c]）}.其中,a=73.212 1,b=9.623 8,c=503.850 1,d=1.018 3. The economic harm permissible level of Phlenm paniculatum Huds. was 3.98% ,control in the threshold value was 39.3 plant per square meters.

关 键 词：麦田 蜡烛草 经济阈值 防除指标 

分 类 号：S451.1[农业科学—植物保护]