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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。
Using the method of geostatistics, the spatial variability of soil potassium in Mengding Mountain tea plantations was studied under different scales. The results showed that there was a moderate spatial correlation between total potassium and available potassium in the soil of Mengding Mountain under the two scales. (1) The C0 / (C0 + C) values of total potassium and available potassium in soil were 43.3% and 27.2% at the small scale, and the variation directions of the two were slightly different. However, The variation of transversal direction was weaker, the distribution of total potassium and available potassium in the soil was flaky, and both were higher in the northeast than in the southwest. (2) There was a moderate spatial correlation between total potassium and available potassium in the soil at microscale, The values of C0 / (C0 + C) were 47.9% and 59.8%, respectively, indicating that the influence of randomness factor on spatial variability was greater than that on the small scale within the microdomains. In the east and south of the soil, the variation trend of potassium in the soil was the most obvious. The variation of available potassium in the northeast direction and the horizontal direction of the slope surface was not obvious. The variation of total potassium and available potassium in the slope direction A regular ribbon distribution appears.