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杨梅为杨梅科杨梅属的常绿乔木,雌雄异株植物。我国主要分布在南温带和亚热带地区的浙江、福建、广东、广西、湖南等省,性喜温暖湿润气候和酸性土壤,PH以4～5为宜。由于杨梅叶为草质,根系分布深广,须根发达,有菌根(据国外研究,在生长季节中,每天每克根瘤组织的干物质,固氮量0.4克左右,而大豆仅0.25克),因此又能在旱瘠的土壤条件下很好生长。树龄可达百年以上,种植5至7年后,覆盖率达85％以
Myrica rubra Myricaceae is an evergreen tree, dioecious plants. China is mainly distributed in Zhejiang Province, Fujian Province, Guangdong Province, Guangxi Province and Hunan Province in the southern temperate and subtropical regions. It prefers warm and humid climates and acidic soils with a pH value of 4 to 5. Myrica rubra leaves are herbaceous and have a wide root distribution, fibrous roots, and mycorrhizal fungi. According to foreign researches, the dry matter per gram of root nodules in the growing season is about 0.4 g nitrogen fixation, while the soybean is only 0.25 g) But also grow well under dry soil conditions. Tree age up to more than a century, planted 5-7 years later, the coverage rate of 85%