Quaternary red clay total nitrogen content was highest, but the available nitrogen content was lower than Granite soil and Purple sandy shale soil.
第四纪红土土壤全氮含量较高，但是其碱解氮含量比花岗岩母质土壤和紫色砂页岩土壤低。
Soil in hilly regions in the middle of Sichuan Province is mainly a type of purple soil which has been developed from the purple shale rock.
川中丘陵区地表以紫色沙页岩风化形成的紫色土壤为主，基岩风化剥蚀过程与流失过程交替进行。该区垦殖率高，植被盖度低，地形破碎，土地利用结构复杂，土壤侵蚀严重。
Results:The genuine producing area of Curcuma Kwangsiensis was showed to be influenced by GBS, and the most suitable GBS was red soil mixed with shale.
结果：广西莪术道地产区的分布受GBS的制约，广西莪术最适宜的地质背景为沙岩和页岩混合型黄红壤区。结论：广西莪术道地产区土壤受其成土母质影响；
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