应用主成分分析法评价稻田生态系统稳定性  

Application of principal component analysis to evaluation of the stability of rice paddy ecosystems

作　　者：陈洪凡 兰波[1] 梁玉勇[1] 杨迎青[1] 李湘民[1] 

机构地区：[1]江西省农业科学院植物保护研究所,南昌330200 [2]华南农业大学资源环境学院,广州510640

出　　处：《应用昆虫学报》2017年第5期876-884,共9页Chinese Journal of Applied Entomology

基　　金：国家973项目(2010CB126200);江西省水稻产业技术体系(JXARS-02-04);江西省科技厅科技支撑(农业领域)项目(20132BBF60007);南昌市科技局对外科技合作项目(2013HZCG020)

摘　　要：【目的】为量化不同类型稻田生态系统调控功能。【方法】利用SAS软件对连续2年不同取样方法下有机稻田和化防稻田中主要节肢动物群落结构特征指数分别进行了方差分析和主成分分析。【结果】方差分析结果表明:不同取样方法下4个群落结构特征指数中,仅有物种数连续2年在有机稻田和化防稻田中表现出差异显著性;主成分分析结果表明:第一年黄板和吸虫器法取样下有机稻田中主要节肢动物群落结构特征指数第一主成分贡献率分别为74.12%和77.69%,均大于化防稻田中第一主成分贡献率67.18%和56.24%;第2年黄板法和目测法取样下有机稻田中主要节肢动物群落结构特征指数第一主成分贡献率分别达到77.20%和75.93%,均大于化防稻田中第一主成分贡献率55.17%和71.15%。【结论】本研究认为,稻田节肢动物群落结构特征指数第一主成分贡献率可以作为有机稻田和化防稻田生态系统调控功能差异的量化指标之一,同时参考物种数指标,以综合评价稻田生态系统抗性程度。[Objectives] To evaluate the control of insect pests in different rice ecosystems. [Methods] Analysis of variance （ANOVA） and principal component analysis of the structural characteristic index of arthropod communities using different sampling methods in organic and non-organic paddy fields was conducted for two consecutive years using SAS software. [Results] The ANOVA results show that, of four arthropod community structural characteristic indices, only the number of species was significantly different over two consecutive years in organic and non-organic paddy fields. The results of principal component analysis indicate that the contribution ratio of the first principal component to the arthropod community structural characteristic index （obtained using yellow board traps and suction sampling） in organic paddy fields reached 74.12% and 77.69%, respectively in the first year, greater than the corresponding values of 67.18% and 56.24% in non-organic paddy fields. In the second year, the contribution ratio of the first principal component to the arthropod community structural characteristic index reached 77.20% and 75.93% respectively, which were also greater than the corresponding values of 55.17% and 71.15% values in non-organic paddy fields. [Conclusion[ The contribution ratio of the first principal component to the arthropod community structural characteristic index could be used as an index of the effectiveness of pest control in organic and non-organic paddy fields. Combining this with the species diversity index allows evaluation of levels of resistance in paddy field ecosystems.

关 键 词：稻田 群落结构特征指数 方差分析 主成分分析 稳定性 

分 类 号：S435.11[农业科学—农业昆虫与害虫防治]