Effect of arbuscular mycorrhizal fungi Glomus mosseae, Glomus fasciculatum and Glomus caledonium on phosphorus uptake and growth of welsh onion (Allium fistulosum L.) in andosols
1996
Tawaraya, K. (Yamagata univ., Tsuruoka (Japan). Faculty of Agriculture) | Kinebuchi, T. | Watanabe, S. | Wagatsuma, T. | Suzuki, M.
A pot experiment was carried out in order to investigate the effect of inoculation of three arbuscular mycorrhizal fungus, Glomus mosseae Gerdemann and Trappe, Glomus caledonium Trappe and Gerdemann and Glomus fasciculatum Walker and Koske and the application of phosphate on phosphorus uptake and growth of Welsh onion (Allium fistulosum L.) in Andosol. The arbuscular mycorrhizal infection rate, phosphorus concentration, and dry weight of shoots were determined. The infection rate with arbuscular mycorrhizal fungi was higher in plants inoculated with G. fasciculatum than those inoculated with other fungi at all P levels (0(P0), 218(P1) and 436(P2)mg P pot(-1)). INfection was highest at the P0 level and decreased with phosphate application to soil. The P concentration in shoots was higher in plants inoculated with G. fasciculatum than in those inoculated with other fungi or in plants without fungi at all P levels. The shoot dry weight was higher in plants inoculated with G. fasciculatum than in those inoculated with other fungi at all P levels. The shoot dry weight of plants inoculated with G. fasciculatum at the P1 level was similar to that of non-inoculated plants at the P2 level. It is suggested that selection of suitable fungal species and optimal phosphate application are important for improvement of growth using arbuscular mycorrhiza, because species differences in the rate of infection, increased P uptake, and growth have been observed at each P level
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