Abstract: The commercial inoculum of Suillus grevillei which was produced with aliquid fermentor was inoculated onto the container-grown Chinese pine see-dlings, together with the spore slurry of Pisolithus tinctorius, bacteria inocu-lum and phosphate fertilizer in the different type of combinations. Havinggrown for only 100 days, the mycorrhizal seedlings were used for afforestationin Chinese Loess Plateau. The results of this 4-year-experiment showed thatthe optimum treatment was the combination of S. grevillei, bacteria andphosphate fertilizer, the treatment which was the combination of mycorrhizalfungi and fertilizer performed better than the one which used only mycorrhi-zal fungi, the treatment which used only fertilizer performed better thancontrol but was not as good as other treatments. It could be concluded thatmycorrhizal fungi could enhance the growth of seedlings, especially in dryweight and phosphate absorption, increase the survival rate of afforestation,continue to exert their abilities to accelerate the growth of seedlings in theafforestation sites after 3 years.

Key words: Ectomycorrhizal inoculum, Suillus grevillei, Pisolithus tinctorius, Pinus tabulaeformis, Afforestation