|
|||||
|
|
| 种群趋势指数的方差近似估计式及其应用 | |
| 引用本文： | 陶方玲,闵嗣璠,梁广文,曾玲. 种群趋势指数的方差近似估计式及其应用[J]. 昆虫学报, 2008, 51(5): 521-525 |
| 作者姓名： | 陶方玲 闵嗣璠 梁广文 曾玲 |
| 作者单位： | 1. 江西农业大学食品科学与工程学院,南昌,330045;华南农业大学资源与环境学院,广州,510642 2. 江西农业大学食品科学与工程学院,南昌,330045 3. 华南农业大学资源与环境学院,广州,510642 |
| 摘 要： | 根据吴惠龙等（1986）发表的稻纵卷叶螟 Cnaphalocrocis medinalis 的生命表及 Watt 种群趋势指数数学模型,在delta-方法的基础上，本文提出了一种种群趋势指数方差的近似估计法，并应用于评价稻螟赤眼蜂Trichogramma japonicum Ashmead 及化学杀虫剂（甲六粉）对稻纵卷叶螟的控制作用。根据中心极限定律，当样本足够大时，种群趋势指数近似于正态分布。根据近似方差估计量以及 Z-检验方法，取得以下结论：放蜂区明显优于对照区，因其种群趋势指数取值较小，相应的 P 值为 0.0111，该区也明显优于化学杀虫剂处理区，相应的 P 值为 0.0036。杀虫剂处理区差于对照区，因其种群趋势指数值较大（0.3035），但这种差异并未达到显著水平，P 值为 0.2236。虽然本文的结论近似于吴惠龙等（1986）单纯依据种群趋势指数所得到的结果，但本文的结论更具统计意义，更加可靠。 |
| 关 键 词： | 近似方差估计式 种群趋势指数 生命表 稻纵卷叶螟 delta-方法 |
| 文章编号： | 0454-6296(2008)05-0521-05 |
| 修稿时间： | 2007-10-08 |
An approximate variance estimator for index of population trend developed with delta-method and its application |
|
| TAO Fang-Ling,MIN Shi-Fan,LIANG Guang-Wen,ZENG Ling. An approximate variance estimator for index of population trend developed with delta-method and its application[J]. Acta Entomologica Sinica, 2008, 51(5): 521-525 | |
| Authors: | TAO Fang-Ling MIN Shi-Fan LIANG Guang-Wen ZENG Ling |
| Abstract: | On the basis of Watt's mathematical model of the index of population trend(I),an approximate variance estimator of I was developed with delta-method in this paper.Taking the natural population life tables of rice leaf roller Cnaphalocrocis medinalis(Lepidoptera:Pyralidae)published by Wu et al.(1986)as an example,it was applied in evaluating the control effectiveness of biological agent(Trichogramma japonicum Ashmead)and chemical insecticide(powder,1.5% mevinphos 3% alpha-hexachloro cyclohexane).By Z-test criterion,biologically and statistically sound conclusions were drawn that at the generation level,the suppression effectiveness of trichogramma wasp against rice leaf roller was better than the blank control with P=0.0111 and smaller I value(0.0390 versus 0.1768),and it was also statistically better than the insecticides with P=0.0036 and smaller I value(0.0390 versus 0.3035).The insecticides was not statistically worse than the blank control with greater I value(0.3035 versus 0.1768),and P=0.2236.Although these conclusions are close to that drawn by Wu et al.(1986)only based on the index of population trend point estimates,they are supported by an accuracy measurement P-value. |
| Keywords: | Approximate variance estimator index of population trend life table rice leaf roller(Cnaphalocrocis medinalis) delta-method |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《昆虫学报》浏览原始摘要信息 | |
| 点击此处可从《昆虫学报》下载全文 | |