Effect of Sinorhizobium meliloti strains on forage yield of alfalfa
2001
Qaderi, Gholam Reza | Dashti, Majid | Fereyduni, Majid
The effect of three sinorhizobium meliloti strains (WSM 540, Hamadani and Maraghai) on forage yield of three alfalfa species including cody, Simmer and Ghrahyongeh were studied. The experiments were conducted in a greenhouse and filed. In the greenhouse, the plants were sowed in plastic pots containing strilled inert material (quartz) and then was inoculated with sinorhizobium meliloti strains. Pots were watered with Hoagland's nitrogen-free solution, during the growth season. In the filed experiment, the same medicago cultivars and Hamadani cultivar also were sowed in dry land farming on North of hoarsen, and then inoculated with sinorhizobium meliloti strains. Plants were outside the soil, and after washing, roots studied for nodulation. Also Number of nodules and forage dry matter were determined. The effect of sinorhizobium meliloti strains on nodulation in two stages including before and full flowering was investigated under filed condition Also the nodule numbers of alfalfa species on first years after planted were determined. Result showed that Hamadani strain increased cultivar yield compared other strains, in greenhouse and filed. In green house average of nodule number was13.6 per plant. However in filed, nodule number was depended on rainfall amount, but there wasn't significant different between inoculated and uninoculated treatments, for nodule number and dry matter. It was indicated that local strains was presented in soil. . Also not differences between plants in terms of number of nodules before and during full flowering stages, two stages, but Cody and Ghrayongeh verities maintained nodules for longer time comparing of non–inoculated plants In general, the only 2.3 present of plants produced nodules in the first year in this experiment
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