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Pakistan Journal of Biological Sciences
Year: 2006  |  Volume: 9  |  Issue: 10  |  Page No.: 1960 - 1964

Effect of Treated Municipal Waste water and Rhizobia Strains on Growth and Nodulation of faba Bean (Vicia faba L. cv. Hassawi)

Mohammed A. Al-Fredan    

Abstract: Scarcity of good quality irrigation water in the Kingdom of Saudi Arabia has resulted in a search for alternative sources for irrigation water. An experiment using municipal effluent in growing faba bean (Vicia faba L. cv. Hassawi) inoculated with four different strains of Rhizobium leguminosarum biovar. Viciae (Hass-1, Hass-2, 500 and 3385), at various concentrations. The results indicated that the faba bean growth was good with neither signs of nutrient deficiency nor signs of toxicity as a result of the use of the different levels of municipal wastewater effluent. The results also indicated that R. leguminosarum strains formed effective symbiosis with faba bean under effluent and well water irrigation treatments. Effluent significantly increased shoot, root and nodule growth (fresh and dry weights), stem and root lengths and nodules/plant. N2 fixation activity and nitrogen content of plant tissues were significantly affected by both effluent and rhizobia treatments. The results of the study revealed that the quality of the treated municipal wastewater effluent was suitable for irrigation of faba bean. The maximum improvement in faba bean growth was recorded with 100% effluent application. Thus, application of effluent was found comparatively more effective than well water in enhancing growth of faba bean. The results also revealed that inoculation of faba bean seedling with local strains (Hass-1 and Hass-2) was more effective in enhancing plant growth than introduced strains (2500 and 3385).

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