关键词: 空间变异, 地统计学, 土壤钾素, 茶园土壤

Abstract: Kriging was used for analysing the spatial variability of K in hilly tea plantation soil by employing geostatistical methods and GIS technique. The results show that Total K and Available K are moderately spatially dependent in Mengding mountain. The rate of nugget to sill is 43.3% and 27.2%, and has obvious variance in the aspect of the gradient, but weaker at the aclinic aspect of the slope, though a little different in other aspects. Kriging analysis shows that in the contents of 24.48 mg/kg to 55.00 mg/kg, Available K has the biggest patches areas, and similar in the contents of 12.09 g/kg to 14.04 g/kg of Total K. Both of their contents distribute into sheet, and are higher in northeast than in southwest. But there are no rules in the vertical aspect.

Key words: spatial variability, geostatistics, potassium, tea plantation soil