菌根能促进植物的生长 ,并提高苗木质量、作物产量和造林成活率。目前 ,在实践中真正应用的主要有美国、中国、法国和加拿大等国家。 PT菌根制剂是由中国林科院林木菌根研究开发中心研制的 ,已形成规模化产品 ,多应用在我国的南方。为了研究菌根菌对寒温带针叶林区主要造林树种 Mycorrhiza can promote the growth of plants and improve seedling quality, crop yield and afforestation survival rate. At present, the real applications in practice are mainly the United States, China, France and Canada. PT mycorrhizal preparation by the Chinese Academy of Forestry Forest Research and Development Center developed, has formed a large-scale products, and more used in southern China. In order to study mycorrhizal fungi on the temperate coniferous forest tree species