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采用野外调查与室内分析相结合的方法,对四川平武野生天麻产区的自然地理、气候、植被、土壤营养成分、土壤及天麻中微量元素含量等进行了研究。研究表明平武野生天麻主要分布于海拔800-1900m范围,该区气候温和、降雨充沛,林木以青冈树为主,草本植物以蕨类为主,成土母质为志留系千枚岩。野生天麻多生长于壤土中,土壤为弱酸性,有机质含量丰富,土壤中速效氮、速效钾含量中等,速效磷较缺乏,土壤有效铜、有效锌和活性锰含量较高,未遭受到重金属污染。天麻对铜、锌具有选择性吸收作用。
The natural geography, climate, vegetation, soil nutrient composition, soil and trace elements content in Gastrodia elata Blume were studied by field investigation and indoor analysis. The results showed that the wild Gastrodia elata was mainly distributed in the range of 800-1900 m above sea level. The climate in this area is mild with abundant rainfall. The main trees are Cyclobalanopsis glauca. The herb is mainly fern, and the parent soil is Silurian phyllite. The wild Gastrodia elata grown in loam soil, the soil is weakly acidic, rich in organic matter, soil available nitrogen, available potassium medium, lack of available phosphorus, soil available copper, available zinc and manganese content is high, not subject to heavy metal pollution . Gastrodia copper, zinc has a selective absorption.