不同尺度下低山茶园土壤钾素含量空间变异特征

运用地统计学方法,研究了蒙顶山茶园土壤钾素在不同尺度下的空间变异特征。结果表明:两个尺度下蒙顶山土壤全钾和速效钾含量均具有中等空间相关性。(1)小尺度下土壤全钾和速效钾的C0/(C0+C)值分别为43.3%和27.2%,二者的变异方向略有不同,但均表现出在顺坡方向变异明显,在横坡方向变异较弱,土壤全钾和速效钾均呈片状分布,且均有东北区高于西南区的趋势;(2)微尺度下土壤全钾和速效钾也具有中等空间相关性,C0/(C0+C)值分别为47.9%和59.8%,表明在微域范围内随机性因子对其空间变异的影响大于小尺度。土壤全钾在东偏南和垂直方向变异最明显,速效钾除在东北方向以及接近坡面水平方向有一定的变异外,在其它方向的变异都不明显,全钾和速效钾均在斜坡方向出现规律性的带状分布。

Spatial Variability of the Content of Potassium in Hilly Tea Plantation Soils with Different Sampling Scales

Employing geostatistical methods,the spatial distribution characteristics of potassium werestudied in hilly tea plantation in Mengding mountain with different sampling scales.The results showed that TK and AK were moderately spatially dependent in Mengding mountain in two scales.In the small scale,there rate of nuget to sill were 43.3% and 27.2%,and had obviously variance in the aspect of the gradient,The TK and AK contents distributed into sheet,and were higher in northeast than in south west.In the micro scale,there rate of nugget to sill were 47.9% and 59.8%,since the random factor had more influence than that in small scale.The TK had obvious variance in southeastward and vertical aspect,while the AK had a little variance in northeastward and near the aclinic aspect,but not very obviously.Kriging showed that both TK and AK had the zonal distribution features in slope aspect.