6Ho I,Zak B. Acid pHospHatase activity of six ectomycorrhizal Douglas fir rootlets and some Mycorrhizal fungi[J]. Plant and soil, 1979,54:395-398.
7Bending G D, Read D J. The structure and function of the vegetative mycetiumof ectomycorrhizN plants. Acitveities of nutrient mobilsing enzybmes in birehl litter colonized byPaxillus imvous(Fr)Fr [J].Newphytologist,1995,130:411-417.
8Theodorou C, Bowenm G D. Mycorrhizal responses of ra diata pine in experiments with difeemt with different fungi [J].Australian Foresty, 1970, 34:183-191.