岩溶中药材种植区土壤肥力特性研究

【研究目的】为了查明岩溶中药材种植区土壤肥力状况，为中药材施肥管理提供理论的依据，开展此项研究。【方法】根据广西岩溶区中药材种植及分布状况，基于野外土壤调查与样品分析数据，应用数理统计分析方法，研究中药材种植区土壤肥力特性。【结果】结果表明：中药材种植区土壤为中性偏微碱性，质地粘重，阳离子交换量（CEC）较高，主要是因交换性钙含量较高所致。在土壤养分方面，土壤有机质、全量氮素和全量磷素含量都较丰富，平均含量分别达49.4g/kg、2.92g/kg和1.10g/kg，而土壤全钾、速效钾和有效硼缺乏，尤其有效硼平均含量只有0.15mg/kg，极缺水平的土样占此次调查样数的97%，土壤严重缺硼。【结论】广西岩溶中药材种植区土壤缺钾和硼，因而在施肥管理上要注意增加钾肥和硼肥的施用。

Study on Characteristic of Soil Fertility in Karst Planting Area of Chinese Traditional Medicinal Materials

OBJECTIVE] In order to realize the status of the soil fertility in the Karst area of Chinese traditional medicinal materials planting,the studies provides the theoretical basis of fertilization of Chinese traditional medicinal materials;METHOD]According to status of planting and distributing of Chinese traditional medicinal materials in Karst area of Guangxi province,based on data obtained from field soil investigations and laboratory analysis,with the aid of the mathematical statistics-based analysis methods,studied on the characteristics of soil fertility in area of Chinese traditional medicinal materials planting.RESULTS] The results showed that the acidity of the soil is from neutral to slightly alkaline,the texture is very sticky,and the CEC is relatively high,because of abundance content of exchangeable Ca.About soil nutrient,these soils have rich organic matter,total N and total P,average contents of them are 49.4g/kg,2.92g/kg and 1.10g/kg,respectively,but lack total K,available K and available B,especially available B,the average content is only 0.15mg/kg,the soil samples that available B lack extremely occupy 97 percent of all in this investigation,the soil available B lack extremely.CONCLUSION]The soil K and B lack in Karst area of Chinese traditional medicinal materials planting in Guangxi,so it's necessary to pay attention to the application of K and B in fertilization.