Study on the Spatial Distribution of White-backed Planthopper Nymphs in the Middle Season Rice Field in Xing＇an, Guangxi Zhuang Autonomous Region | 广西兴安地区中稻田白背飞虱若虫空间分布研究
2013
Wang Haijian, Sichuan Agricultural University, Yaan(China),College of Agriculture | Jiang Chunxian, Sichuan Agricultural University, Yaan(China),College of Agriculture | Wu dunjie, Sichuan Agricultural University, Yaan(China),College of Agriculture
chinois. 【目的】研究广西兴安地区中稻田白背飞虱空间分布格局，为提高其监测预警及有效防控提供依据。【方法】采用GS＋软件建立不同时期中稻田白背飞虱若虫种群密度的半方差函数模型，并利用ArcGIS软件普通克立格插值法对白背飞虱若虫种群密度进行插值和模拟。【结果】广西兴安地区中稻田白背飞虱若虫种群密度从7月初中稻分蘖期到9月上旬中稻收获，随时间呈现双峰型。田间分布格局随时间表现出聚集分布――随机分布――聚分布集――随机分布的趋势。在呈现聚集分布的各次调查中，白背飞虱若虫空间相关范围为7.32-36.93m，结构性强度为50.5-97.4%，具有较强的空间相关性。【结论】白背飞虱若虫种群具有空间异质性和时间异质性。
Afficher plus [+] Moins [-]anglais. 【Objective】Spatial distributions of white-backed planthopper （WBPH） nymphs were studied to provide a basis for early warning and effective control. 【Methods】The semivariograms models of WBPH nymphs in different rice growing stages in the middle season rice field were constructed by using software GS＋, and simulation charts of the WBPH nymphs at each stage were created by using software ArcGIS with Kriging interpolation. 【Results】From rice tillering stage to the rice harvest, the population density of WBPH nymphs changed with time and showed double peak type. The spatial distribution of WBPH nymphs were aggregation distribution - random distribution - aggregation distribution - random distribution with time changed. The space-related area of WBPH nymphs in the investigation which showed aggregation distribution were 7.32-36.93m, the structure intensity were 50.5%-97.4%. The spatial correlation of WBPH nymphs was strongly dependent. 【Conclusion】 The WBPH nymphs population had spatial and temporal heterogeneity.
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