油松毛虫卵(块)种群密度简易估计的零频率方法  

Zero Frequency Method for Estimating Eggs Density of Dendrolimus tabulaeformis

作　　者：张连翔 于晓东 罗春田 

机构地区：[1]辽宁省凌源汽车发动机制造厂 [2]辽宁省喀左县林业局 [3]辽宁省凌源市气象局

出　　处：《东北林业大学学报》1997年第5期38-42,共5页Journal of Northeast Forestry University

摘　　要：文中对油松毛虫卵（块）种群密度简易估计的零频率方法进行了研究。通过引入负二项分布参数ｋ（ｋｃ）值，使建立在Ｉｗａｏｍ－ｍ模型和Ｔａｙｌｏｒ幂法则模型基础上的种群密度简易估计方法由Ｐ０＝ｆ（ｍ）的隐式形式转换为ｍ＝ｆ（Ｐ０）的显式形式，从而更便于应用及模型间的比较。在参与比较的３种方法中，以Ｇｅｒｒａｒｄ－Ｃｈｉａｎｇ模型的估计效果最好，同时推导出了Ｇｅｒｒａｒｄ－Ｃｈｉａｎｇ模型的抽样方法，并进行了具体应用。Zero frenquency method used to estimate the density of eggs of Dendrolimus tabulaeformis was studied. With introducing k ( k c ) value of negative bionomial distribution, the estimate method of population density based on the models of Iwao m*-m and power law of Taylor was transformed from P 0= f ( m ) into m = f ( P 0), which makes usage and comparison between models easier. Among the three methods used for comparison, the estimated results of three Gerrard-Chiang model is the best. The sampling method of Gerrard-Chiang model is obtained and put into use.

关 键 词：油枷毛虫卵(块)种群 简易估计 零频率方法 Marquardt方法 函数转换 

分 类 号：S763.3[农业科学—森林保护学]