杨树插干造林以及苗圃和温室的扦插繁殖,要依靠良好和稳定的生根力。提高生根力使杨树初期生长旺盛,保证全苗,以充分发挥栽培措施的潜力。人们一直在寻找提高和稳定插穗生根力的方法,使有前途的杨树无性系的生产潜力能发挥出来,给集约栽培带来好处(Zsuffa等1977,1979)。天然或人工接种的真菌共生体在植物根上形成菌根,能改善寄主的生长和发育状况。彩色豆马勃Pisolithus tinctorius (Pers.)Cokerand Couch是许多树种上的一种外生菌根共生体。在苗圃和造林地它对松树和其它树种的成活率和生长有促进作用,已被证实。很多事实 Poplar truncation afforestation and nursery and greenhouse cutting propagation, to rely on good and stable rooting force. Raising the rooting force makes the poplar grow vigorously in the early stage and ensure the whole seedlings to fully exert the potential of cultivation measures. People are always looking for ways to improve and stabilize the rooting ability of cuttings and make the potential of promising poplar clones productive and beneficial for intensive cultivation (Zsuffa et al. 1977, 1979). Naturally or artificially inoculated fungal symbionts form mycorrhizal roots on plant roots that improve the host’s growth and development. Pisolithus tinctorius (Pers.) Cokerand Couch is an ectomycorrhizal symbiont on many tree species. It has been shown to promote the survival and growth of pine and other species in nurseries and afforestation sites. A lot of facts