白背飞虱若虫空间格局的地统计学分析  

Geostatistical Analysis on Spatial Distribution of White-Backed Planthopper Nymphs

作　　者：闫香慧[1] 赵志模[1] 刘怀[1] 肖晓华[2] 谢雪梅[2] 程登发[3] 

机构地区：[1]西南大学植物保护学院,重庆400715 [2]重庆市秀山县植保植检站,重庆秀山409900 [3]中国农业科学院植物保护研究所,北京100193

出　　处：《中国农业科学》2010年第3期497-506,共10页Scientia Agricultura Sinica

基　　金：国家"十一五"科技支撑计划(2006BAD08A01)

摘　　要：【目的】研究白背飞虱[Sogatella furcifera(Horváth)]迁入后其后代若虫在稻田间的聚集与扩散的动态过程和空间分布规律,为综合防治提供理论依据。【方法】本文根据2008年在秀山县的系统调查资料,运用地统计学中的半方差函数,建立了秀山县水稻栽插至成熟10次调查时间在东西和南北2个方向上白背飞虱若虫的空间变异曲线模型,并利用Surfer8.0软件对空间分布数据进行插值和模拟。【结果】白背飞虱若虫密度越高,空间变量的变化幅度越大;由随机因数引起的空间变异平均为38.7%,由自相关因数引起的空间变异为61.3%,且空间变异的随机程度有随水稻生育期而逐渐增高的趋势;各调查时间东西方向的空间相关范围都小于南北方向,前者平均为18.99m,后者为25.09m;空间插值表明白背飞虱若虫种群在稻田的聚集斑块南北方向比东西方向长。【结论】白背飞虱若虫种群的空间分布主要呈聚集分布;在研究尺度下,南北方向是白背飞虱若虫种群聚集和扩散的主要方向。[Objective] Dynamic process and spatial pattern of the white-backed planthopper （WBPH）, Sogatella furcifera （Horwith） nymphs after they immigrated into the rice were studied to provide a theoretical basis for its integrated control. [Method] Models of space variation were constructed at the directions of east-west and south-north based on the geostatistical method by using 10 survey data from the transplanting to ripening of the rice in Xiushan, Chongqing in 2008. Isoclines maps of the WBPH nymphs at each stage were created by the geostatistical software Surfer8.0 with Kriging interpolation. [Result] The variograms showed the higher the WBPH nymphs density was, the larger the space variation scope became. Average space variation was 38.7% caused by the random factor and 61.3 % caused by the autocorrelation. The random degree of space variation became greater as the rice grew up Space-related area was 18.99 m in the direction of east-west and 25.09 m in south-north averagely. Kriging interpolation indicated that aggregated scope in south-north was larger than in east-west. [Conclusion] The population of white-backed planthopper nymphs showed a clumped distribution mainly after immigrating into rice fields and south- north was the main direction for WBPH nymphs to aggregate and diffuse.

关 键 词：白背飞虱 地统计学 空间结构 SURFER 8.0 

分 类 号：S435.112.3[农业科学—农业昆虫与害虫防治] Q149[农业科学—植物保护]