白条党主产区土壤理化性状及药材经济性状分析

为了研究白条党主产区土壤理化特性和药材经济性状,以定西和陇南地区7个县（宕昌、临洮、渭源、岷县、陇西、漳县及通渭）21个调查点连续两年的土壤和白条党为调查对象,分析各调查点土壤理化性质和白条党的药材经济性状。结果表明：甘肃白条党主产区经度大致在103°35'—105°26'之间;纬度大致为33°57'—37°58';海拔高度约在1708.4~2488.6 m。各县土壤有机质平均含量在9.25~17.50 g/kg之间,整体偏低,其中临洮县土壤有机质含量最低;土壤碱解氮平均含量在19.56~39.96 mg/kg,陇西县土壤碱解氮含量极低;土壤速效磷含量均大于10 mg/kg;土壤速效钾平均含量在80.73~128.40 mg/kg,除渭源和岷县土壤速效钾含量为低至中等外,其余表现中等至较高;土壤pH>7.5,属于微碱性和碱性土壤。岷县生产的白条党单根产量最高,根长且粗,商品性最好。

Soil Properties and Economic Properties of Codonopsis pilosula in Main Production Areas

To study soil physical and chemical properties and economic properties of Codonopsis pilosula in main production areas, Codonopsis pilosula and its planting soil were investigated for two consecutive years at 21 sites in Gansu, including Tanchang, Lintao, Weiyuan, Min County, Longxi, Zhang County and Tongwei. The results showed that the main production areas of C. pilosula were in 103°35'—105°26' N, 33°57'—37°58' E, and altitude of 1708.4-2488.6 m. The average content of soil organic matter was 9.25-17.50 g/kg, which was generally low, and the lowest was found in Lintao. The average content of soil alkali-hydrolyzable nitrogen was 19.56-39.96 mg/kg, the content of soil alkali-hydrolyzable nitrogen was extremely low in Longxi. The content of available phosphorus in soil was more than 10 mg/kg, and the average content of available potassium was 80.73-128.40 mg/kg. The soil available potassium content was low to medium in Weiyuan and Min County, and that in other counties were medium to high level. The soil pH was more than 7.5 in all counties, belonging to slightly alkaline and alkaline soil. The Codonopsis pilosula produced in Min County had the highest yield, the longest and thickest root, and the best commercial quality.