Tobacco Science & Technology, 2012, 11, p. 74-78, ISSN.1002-0861

Influences of arbuscular mycorrhizal fungi on phosphorus content in tobacco planting soil and nutrition absorption of flue-cured tobacco plants

YAO Juan(1); WANG Maosheng(2); WANG Feng(*1,3); XU Dongqing(2)
(1) Agricultural College of Guizhou University, Guiyang 550025, P.R. China; (2) Guizhou Tobacco Science Institute, Guiyang 550081, P.R. China; (3) Qianxinan Prefecture Tobacco Company of Guizhou Province, Xingyi 562400, Guizhou, P.R. China

In order to study the mycorrhizal effects of mycorrhizal seedling after transplanting, three nitrogen (N) levels, 45, 67.5 and 90 kg/ha, were applied in field experiments and the effects of mycorrhizal seedlings on phosphorus (P) content in soil and N and P absorption of plants at fast growing stage were studied. The results showed that: 1) The effects of Arbuscular mycorrhizal (AM) fungus inoculating on the P content in tobacco planting soil and tobacco plants were insignificant at the N application level of 45 and 67.5 kg/ha, however, P content would be effectively improved at the level of 90 kg/ha. 2) The N contents in tobacco root, stem and leaves were remarkably decreased by Glamus mosseae (Gm01) inoculating at different N application levels, but, Glamus mosseae (Gm02) inoculating was remarkable only at the application level of 90 kg/ha. 3) The N/P ratio in tobacco was effectively decreased by AM fungus inoculating at different N levels, however, Glamus mosseae (Gm01) inoculation was more effective. It indicated that N application would affect the mycorrhizal effects of AM fungi, but the effects of Glamus mosseae from different origin differed to a certain extent.