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蚕豆蚜数量动态预测研究
STUDY ON THE POPULATION DYNAMICS PREDICTION OF BROAD BEAN APHIDS
【摘要】 为害蚕豆的主要蚜种Aphis craccivora Koch、Acyrthosiphon pisum(Harris)、Megoura japantca Matsumura,在蚕豆生长的季节,其发生发展具有明显的阶段性,即迁入定居、数量波动、扩散蔓延及消退4个阶段。数量动态预测模型:At=B(multiply from i=1 to 1(Vi)的核心变量“单位时间增长率(Vi)”基本包涵了种群数量经典估计方程:P=P0{[R(1-d)]n(1-m)}中{[R(1-d)]n(1-m)}项的内容。因Vi及有蚜枝率、百枝蚜量、温湿系数均不是正态分布,且误差悬殊较大,不宜采用线性回归分析,故先按预定标准将温湿系数(Xe)、有蚜枝率(Xa)、百枝蚜量(Xb)的定量数据转化为定性数据,再用定性因子回归分析建立Vi的估计方程,并加田块类型、品种布局、天敌作用3个矫正项: (?)t=[b0+sum from i=1 to 4(be,iXe,i)+sum from j=1 to 5(bjXi)]+C1+C2+C3
【Abstract】 In the growing season of broad bean, the broad bean aphids , mainly the cowpea aphid Aphis craccivora Koch , Japanese vicia aphid Megoura japonica Matsumura and pea aphid Acyrthosiphon pisum (Harris), undergo four distinct periods, namely, immigration-colonization, quantitative fluctuation, dispersion and reduction. In the prediction model of population dynamics :the core variance "Vi"increase rate in unit time" has basically embodied the {[R(1- d)]n ( 1 - m) } , main part of the classical population estimation equation P = Pn { [R(1 - d)]n(1 - m)}. Due to all the Vi, infected branch rate, aphid number/100 branches and humidi-ty-temperate coefficient not belong to normal distribution, it is inappropriate to adopt linear regression method for analysis , otherwise the error would be significantly enlarged. Consequently, the data of humidity-temperature coefficient Xe , infected branch rate X, and aphid number/100 branches Xb were then be converted from quantitative to qualitative, before the estimative equation of Vi was developed by regression analysis with qualitative factors , and three emendatory terms , i. e. field types C1 , distribution of varieties C2 and control effect of natural enemies C3 , were added. The integrated equation was as follows :
- 【文献出处】 植物保护学报 ,Journal of Plant Protection , 编辑部邮箱 ,1995年02期
- 【分类号】S435.23
- 【被引频次】3
- 【下载频次】67