Journal of Agricultural Science and Sustainable Production (Jun 2021)
Evaluation of Grain Yield and some Physiological Characteristics of Common Bean (Phaseolus vulgaris L.) under Water Deficit and Molybdenum
Abstract
Abstract Background & Objective: This study was conducted to evaluate the yield and some physiological characteristics of leaves and yield of dry bean affected by water deficit stress and foliar application of molybdenum. Materials & Methods: This experiment was conducted as a split plot - factorial based on randomized complete blocks design with three replications during the two years 2012-2013 at the Research Farm of Faculty of Agriculture, University of Tabriz. The main factor includes three different levels of irrigation (control: irrigation after 55-60, mild stress: 90-95 and severe stress: 125-130 mm evaporation from Class A evaporation pan) and sub-factor includes factorial composition of molybdenum levels, foliar application (+ Mo (80 kg.ha-1 from the source of sodium molybdate) and non-applicatin (-Mo) and genotypes (including AKHTAR (red bean) and COS16 (pinto beans)). Results: The results showed that water deficit reduced RWC (on average, 8 and 14% in moderate and severe stress, compared to the control, respectively) and LAD (on average, 15 and 31% in moderate and severe stress, compared to the control, respectively). While molybdenum foliar application by reducing the negative effects of water deficit, due to maintaining the leaf relative water content, increasing green area continuity and pods number per plant, increased biological yield and grain in bean genotypes. Conclusion: Reduction of relative water content (RWC), leaf area duration (LAD) and grain yield and yield components due to water deficit were significantly amolirated (with an increase of 3, 15, 39 and 11% for each of the above traits, respectively) by molybdenum foliar application. As a result, the use of molybdenum can be recommended to reduce the effects of drought stress in plants, especially beans.
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