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基于1982年全国第二次土壤普查数据和2008年国家测土配方项目数据,利用SPSS17.0和Arc GIS9.0软件平台对宜宾市南溪区长兴镇耕地土壤pH进行研究.结果表明,长兴镇耕地土壤整体偏酸性,呈北高南低的特点,pH范围在4.2～9.4之间.经过近30年的时间,长兴镇土壤pH已由1982年时的6.8降到2008年的5.9,其中以沙溪庙组紫色砂泥岩下发育的淹育型水稻土下降得最快.
Based on the data of the second national soil census in 1982 and the national soil reclamation project data in 2008, the soil pH of cultivated land in Changxing Town, Nanxi District, Yibin City was studied by using SPSS17.0 and ArcGIS9.0 software platform.The results showed that Changxing Town The soil of the cultivated land is generally acidic, with a characteristic of high north to south and a pH range of 4.2 to 9.4. After nearly 30 years, the pH of the soil in Changxing has dropped from 6.8 in 1982 to 5.9 in 2008, of which The submerged paddy soil developed under the purple sandstone shale in the Shaximiao Formation dropped most rapidly.