Abstract: The authors'experiments proved that ectomycorrhizae may improve the early growth of Pinus tabulaeformis.It obviously stimulates the biomass production of pine seedlings.The approximate percentage of increase is 40%. Among the mycorrhizal fungi used in our experiments,five were selected as good ones which are capable of forming ectomycorrhizae and stimulating growth of P.tabulaeformis seedlings,i.e,Boletus sp.,suillus grevillei,Pisolithus tinctorius,and strains obtained from the ectomycorrhizal association of loblolly pine and scotch pine trees. Biological analysis in greenhouse studies shows that all species mentioned above,whether collected from mycorrhizae association or from mature fruitbodies of fungi,can easily from ectomycorrhizae with P.tabulaeformis. The results of experiments show that by inoculum of solid pure culture,mycorrhizal fungi on roots have a great capacity to establish ectomycorrhizae of coral type.The stimulation of seedling growth (including measurements of height,thickness and biomass)is proportional to the development of mycorrhizae on it. The fact that acid soil conditions are needed for the formation of ectomycorrhizae is well documented throughout the world.Usually ectomycorrhizae develops either weakly or not at all basic soil.But in the authors' experiments mycorrhizae are formed both in nursery soil (pH8.6) and in greenhouse soil (with alkalinity of up to 8.9),and can improve the growth of seedlings well.It has been proved by these authors that even under harsh soil conditions suitable strains can survive and grow significantly.This fact enlarges the area of potential research into the ability of fungi to survive in adverse soil conditions. The ingredients of the nutrient medium are as follows:1) pine needle extract,2)acidic malt agar.