外生菌根对幼树存活和生长的重要性,已有充分的资料证明。世界上不少地方,在苗圃内采用了特殊的培养方法,以促进外生菌根的发育。此类方法包括:增加含菌土壤,保持丰富的有机质和中至低等的肥力,以及靠近苗圃栽种寄主树等,以促进天然定殖子实体的产生。对于将纯培养真菌引入苗圃土壤的研究,阿根廷、澳大利亚和美国均已作了大量工作,这种纯培养真菌比天然发生的苗圃真菌对苗木定植后更为有利。美国在不同的苗圃里,对各种南方松树幼苗,用彩 Ectomycorrhizal saplings on the importance of survival and growth, have sufficient data to prove. In many parts of the world, special cultivation methods are used in nurseries to promote the development of ectomycorrhiza. Such methods include increasing soil-containing bacteria, maintaining abundant organic matter and moderate to low fertility, and planting host trees near nurseries to promote the production of natural colonizers. Much work has been done in Argentina, Australia and the United States on the introduction of purely cultured fungi into nursery soil that is more favorable than the naturally occurring nursery fungi for seedling colonization. The United States in different nurseries, a variety of southern pine seedlings, with color