一、生长条件土壤、湿度、温度和蜜环菌是天麻生长发育必须具备的条件。１．土壤：必须结构疏松、通气透水性强、保温保温、ｐＨ值５．５～６．５之间的偏酸性土壤，而对肥力要求不严格。２．湿度：天麻生长期湿度宜控制在４０％～５０％，越冬期在３０％左右。湿度小了天麻生 First, the growth conditions Soil, humidity, temperature and Armillaria mellea growth and development of Gastrodia must have the conditions. 1. Soil: the structure must be loose, breathable and strong water, heat insulation, pH value of 5.5 to 6.5 between the acidic soil, and the requirements of fertility is not strict. 2. Humidity: Tianma growing humidity should be controlled at 40% to 50%, overwintering at about 30%. Tianma small humidity students