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.
出处
《现代农业科技》
2012年第18期112-113,共2页
Modern Agricultural Science and Technology
关键词
麦田
蜡烛草
经济阈值
防除指标
wheat field
Phlenmpaniculatum Huds.
economic threshold
control in index
