关键词: 马尾松毛虫, 空间格局, 地学统计学, 松林, 秸秆还田, 容重, 土壤有机碳, 腐殖化系数, 耕作

Abstract: Geostatistic analysis of the spatial patterns of the overwintering generation pupae, first generation egg masses and early stage larvae of Dendrolimus punctatus (massonpine caterpillar) in Pinus elliottii-P.massoniana-P.taeda forest indicated that the semivariograms of pupae was fitted to the spherical curves at 0°,45°,90°and 135°directions, and the spatial continuity was the strongest at 90°direction. No difference was found on the semivariograms of eggs masses and larvae, which were shown as exponential curves. The semivariograms of pupae, egg masses and larvae at omnidirection were described by spherical model, indicating an aggregated spatial distribution. The strongest clumped spatial pattern was at pupae stage, and then, at larvae and egg masses stages. The semivariogram models of pupae,egg masses and larvae were simulated respectively. The isovalue maps of interpolated estimates of pupae, egg masses and larvae densities were generated by using Kriging techniques.

Key words: Dendrolimus punctatus, Spatial pattern, Geostatistics, Pine forest, straw incorporation, bulk density, tillage, humification coefficient, soil organic carbon