论文部分内容阅读
以昌江黎族自治县(昌江县)为研究区,借助于空间分析手段,分析区内第2次土壤普查期间到2009年土壤耕层土壤pH的时空变异特征,并阐述其主要成因。结果表明,在气候、地形、母质、植被等自然因素共同作用下,20世纪80年代研究区土壤pH在西北到东南方向上有逐级降低的特征。区内2009年土壤pH值低于第2次普查期间,且空间变异度变小,平均值由6.0降至5.8;土壤pH分布受施肥、工矿等人为生产活动的影响,原有的空间分布格局有所改变,主要表现在昌化、海尾、乌烈等地土壤出现酸化特征。
Taking Changjiang Li Autonomous County (Changjiang County) as the research area, with the aid of spatial analysis method, the spatio-temporal variation characteristics of soil pH during the second soil survey in the region to 2009 were analyzed and the main causes were explained. The results show that under the combined action of natural factors such as climate, topography, parent material and vegetation, the soil pH in the study area in the 1980s decreased gradually from northwest to southeast. The soil pH value in 2009 was lower than that in the second census, and the spatial variability became smaller and the average value decreased from 6.0 to 5.8. The soil pH distribution was affected by man-made activities such as fertilization and industrial and mining activities. The original spatial distribution pattern Some changes, mainly in Changhua, sea tail, Wu Lie soil acidification characteristics.