Influence of mycorrhizal fungus Gigaspora calospora and some phosphorus source on dry weight and phosphorus content of sorghum
1987
Yahya, A.I. | Munam, B.H. | Al-Nassiri, A.S. (Scientific Research Council, Baghdad (Iraq). Agriculture and Water Resources Research Centre, P.O. Box 2416) | Abdul-Ridha, H.A. (Basrah Univ., Basrah Province (Iraq). Coll. of Agriculture)
An experiment was conducted at leathhouse to study the effect of two strains of mycorrhizal fungus Gigaspora calospora (P.C.19 and P.C.25) on dry weight and phosphorus content of Sorghum bicolor (L) Moench. The mycorrhizal inoculum in the present study was prepared from the infected roots of white clover (Trifolium repens) with the rhizosphere soil. Inoculation with the strain P.C. 19 significantly increased the phosphorus content and dry weight of S. bicolor. When superphosphate (100 kg/ha) was added with the strain inoculum, a better response was noticed for both parameters. However, the strain P.C.25 did not enhance the dry weight and phosphorus uptake of sorghum regardless of the application of phosphorus sources. Addition of rock phosphate with P.C.19 inoculum to soil increased the intensity and percentage of infection. A similar effect was noticed when the phosphogypsum was added with P.C.25 inoculum. However, this is not reflected on uptake and dry weight of the plant. The available phosphorus in soil was found to be increased when the superphosphate was added to soil only
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