武功县耕地质量空间变异分析

Analysis of Spatial Variation of Arable Land Quality in Wugong County

为了弄清楚武功县耕地质量空间变异规律,应用地统计学方法,分别针对武功县耕地自然质量等指数、利用等指数和经济等指数各选取1000个分等单元样点,在保证样点为正态分布的前提下,应用GS+9.0软件进行对武功县耕地自然质量等指数、利用等指数和经济等指数的空间变异进行定量分析。结果表明:武功县耕地质量的空间变异是以结构性因素引起的为主,自然质量的空间变异在3270 m以内,利用质量的空间变异在11310 m以内,而经济质量的空间变异在14970 m以内。自然质量以南北方向和西北东南方向变异大,而东西方向变异小。利用质量和经济质量则以南北方向和西南东北方向变异大,东西方向变异最小。地统计学方法是定量研究耕地质量空间变异的有效方法,利用地统计学方法对耕地质量空间变异研究有利于认识耕地质量空间分异规律,也有利于有效选择耕地质量监测样点。

In order to clarify the spatial variation of arable land quality in Wugong County, Shaanxi Province, this research analyzed quantitatively the natural arable land quality index, utilization quality index and economic quality index for the 1000 unit samples selected under the condition of normal distribution of the samples data by using GS＋9. 0 software. The results indicated that spatial variation of arable land quality in Wugong County was mainly caused by structural element. Spatial variation of natural quality was within 3270 m, that of utilization quality was within 11310 m, and that of economic quality was within 14970 m. Natural quality mainly varied in the north-south and northwest-southeast direction and slightly varied in the west-east direction. Nevertheless, the variation of utilization quality and economic quality mainly was large in the north-south and northeast-southwest direction, but was small in the west-east direction. Geo-statistics was an effective method to research quantitatively the spatial variation of arable land. The research on the spatial variation of arable land quality by using geo-statistical methods was propitious to know the rule of spatial variation of arable land quality and to select monitoring sampling points of arable land quality effectively.