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运用地统计学方法,分析冬枣枣尺蛾卵块空间格局,建立了南北和东西两个方向上的半变异函数曲线模型。结果表明,枣尺蛾卵块在南北方向上的半变异函数为球形—指数套合模型,东西方向上为指数模型,在调查范围内其空间格局为聚集型;枣尺蛾卵块在南北方向和东西方向的变程分别为40.8327m和11.2301m;在南北方向和东西方向上,其自相关性和结构特征引起的种群变异为90.55%和13.91%,表明前者具有很强的空间相关性。利用Kriging插值法生成的等值线图清晰反映了卵块的空间位置,进一步表明枣尺蛾卵块呈聚集分布。
By using geostatistics method, the spatial pattern of jujube jujube eggs was analyzed, and a semi-variogram curve model was established for north-south and east-west directions. The results showed that the semivariogram of the jujube ’s egg mass in the north - south direction was a sphere - index set model and the east - west direction was an exponential model. The spatial pattern of the jujube’ s eggs was aggregated in the north and south directions Respectively. The variability in direction was 40.8327m and 11.2301m, respectively. The population variation caused by the autocorrelation and structural features was 90.55% and 13.91% in the north and south direction and the east-west direction, indicating that the former had strong spatial correlation. The contour plot generated by Kriging interpolation clearly reflects the spatial location of egg masses, which further indicates that the egg masses of Jujube were aggregated and distributed.