摘要
根据茶小绿叶蝉的双峰型年份的一峰期各旬虫口密度数据,分别对上升期、下降期和全峰期(累计虫口百分率)作数学模拟,揭示其种群数量的动态规律。研究阐明一峰上升期种群数量是指数曲线(y=aebx)增长动态;一峰下降期种群数量呈直线形式(y=a+bx)下降;全峰期的累计虫口百分率变化符合loaistic曲线轨迹(y)。研究还阐明了双峰型年份夏茶严重遭灾的根本原因是占全峰期总虫量68%的虫口发生在夏茶萌发、生长和采摘期间。
the investigation showed that during the rising stage,population number accorded with exponential funtion (y=aebx),during descending stage population number tallied with linear function (y=a+bx),and during whole peak stage the accumulative population percentage conformed to Logistic equation (g= ). The investigation also indicated that itmainly resulted from 68% of total population within whole peak stage emerging 'during sprouting, growing and picking stages that summer tea was seriously attacted in double population peaks years.
出处
《安徽农业科学》
CAS
1995年第4期340-341,共2页
Journal of Anhui Agricultural Sciences
关键词
茶小绿叶蝉
一峰期
数量模拟
种群
茶树
害虫
Tea Green Leafhopper,First population peak period,Population number dynamic imitation