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《Journal of the Graduate School of the Chinese Academy of Science》 1986-01
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EFFECTS OF VA MYCORRHIZAE AND ZINCOUS CONCEN TRATION ON THE GROWTH OF SUNN CROTALARIA

Bi Kuo-chang (Graduate School,Academia Sinica) Kuo Shiu-chien (Chinese Academy of Forest Sciences)  
Inoculation of Sunn Crotalaria seedlings with VA mycorrhizal fungi(Glomus epigaeus)greatly increased the plant height,dry weight production and uptake of phosphorus,zinc and copper by the host plant.Particularly,inoculation with both VAM and Rhizobium showed the most favourable effects on the increasing of biomass and uptake of Zn and Cu.Inoculation with VAM also caused the blooming period to occur about one month earlier,compared with the non-inoculated plant.The application of zincous nutrients also influenced the height growth and biomass of Sunn Crotalaria.In this experiment,the intermediate concentration of zinc sulfate,that is 30 ppm ZnSO_4,was the most effective for the growth of Sunn Crotalaria,as well as for the colonization and development of Glomus epigaeus.Natural infection of Crotalaria seedlings by the aboriginal VAM produced a smaller percentage of infection and of intensity of root colonization. The effects of infection by the aboriginal VAM on the host plant appeared much later than the effects of artificial inoculation with Gl.epigaeus.
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