No abstract

This study was initiated to determine the itiuence of vesiculararbuscular mycorrhizal (VAM) fungi on a rhizobhun-legume interaction. Inoculation of subclover with Glomus fascicddus resulted in 2 times as many rhizobium nodules on roots as on nonmycorrhizal controls. Inocuhtion with Glomus mosseue resulted in 1.4 times greater nodule formation compared to the noninoculated controls. Plants inoculated with G. mosseue + G. fusckulatus had 1.9 times more nodules than the controls. Furthermore, inoculation with G. fasciculatus or G. mosswe+ G. fasciculatus resulted in shoot weights and total plant weights nearly double that of the controls. The conclusion is that inoculation with the correct VAM fungal species is as important as the selection of the rhizobium species for subclover growth and development. Authors arc. respectively, associate professor, graduate research assistant, and former student. Debartment of Ranne Manaeement. Humboldt State Universitv. Arcata, Califorttia 45521, and projecy leader, 'kocky 'Mountain Forest and Ran& Experiment Station. Albuquerque,, New Mexico 87106. William Beavis is presently a research assistant. Iowa State Untversity, Ames Xl01 I.