Study on Soil Taxonomy of Typical Tobacco-planting Fields in Panxi Mountain Area of Sichuan Province

WANG Chengdong;XU Yiming;YANG Jianchun;ZHNAG Ruiping;WANG Songfeng;YANG Junwei;SUN Fushan;WANG Shusheng;ZENG Qingbin;Tobacco Research Institute of CAAS (Key Laboratory of Tobacco Biology and Processing of MOA);Panzhihua Branch of Sichuan Tobacco Company;

Typical tobacco-planting field;;Soil forming factors;;Profile morphology;;Soil taxonomy;;Panxi mountainous area

Soil condition has important influences on the yield, quality, aroma style and its manifestation of flue-cured tobacco, well-understanding soil is the basis of rational utilization and improvement of soil. In this study 5, 5, 5 and 4 typical tobacco-planting fields were selected on the base of comprehensive consideration of the conditions of topography, soil parent material, soil conditions, tobacco growth situations and leaf qualities in Miyi and Renhe of Panzhihua City as well as Huili and Huidong of Liangshan Prefecture of Panxi mountainous area which are typical high-quality tobacco planting regions in Sichuan Province, soil profiles were surveyed and soil types were determined according to Chinese Soil Taxonomy on the base of the field observation on soil formation factors and profile morphological characteristics as well as the physiochemical properties of similar typical soil profiles obtained in the 2 nd National Soil Survey. The results showed that the 19 studied fields were belonged to 4 soil orders, 7 soil suborders, 9 soil groups and 11 soil subgroups. Overall, the studied fields have the advantages of thicker pedons and appropriate contents of rock fragments but the disadvantages of clayey textures, and some are the slope-drylands with the potential soil erosion.