Browsing by Author "ALEM SISAY SAHILE"

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    MORPHO-PYSIOLOGICAL AND YIELD RESPONSE OF COMMON BEAN (Phaseolus vulgaris L.) VARITIES TO BELNDED FERTILIZER UNDER DIFFERENT MOISTURE LEVELS
    (Hawassa University College of Agriculture, 2023) ALEM SISAY SAHILE
    Common bean is the most important food legume crop for direct consumption in the world and is the most popular legume of the Americas and Eastern and Southern Africa. In Ethiopia, common bean is grown predominantly under smallholder producers as an important food crop and source of cash. There are biotic and abiotic stresses which causes a decrease losses in crop yield, being the water deficit, and soil fertility are the most limiting factor in the world agricultural production. Therefore, the aim of this study was designed to investigate the effect of blended fertilizer on morpho-physiology, accumulation of reserve compounds and yield of common bean varieties under different soil moisture levels from Feb to May 2021. A factorial combination of 3 different blended fertilizer (0, NPSBZn and NPSBZn+K), 3 common bean varieties (Hirna, Awash Melka, and Haromaya) and 2 moisture levels (30% SWC and 75% SWC) were arranged in CRD design with three replications. Results of the study showed that, morphological parameters such as leaf number, branch number and plant height were influenced by main and two-way interaction effect of varieties and moisture as well as fertilizer and varieties. But leaf area was influenced by three way interactions of variety, moisture and fertilizer levels. in addition, chlorophyll content, chlorophyll fluorescence, Photosynthetic rate, stomatal conductance, water use efficiency, proline content, carbohydrate content, and grain yield were significantly influenced by three way interaction effects of variety, fertilizer and moisture levels. They showed significant decrement under drought stressed conditions. The supplementation of K significantly increased physiological, and yield parameters under drought stress conditions compared to NPSZnB alone and zero fertilizer level. From the result of this study it is indicated morpho-physiology and yield response of common bean varieties varied under water deficit conditions. Hirna and Haromaya performed well under water deficit than Awash Melka variety. Better performances were observed in terms of photosynthesis, water use efficiency, relative water content, and stomata conductance, proline and carbohydrate accumulation in Hirna and Haromaya under drought stress condition. Generally, it was concluded that application of K as a supplement to NPSBZn significantly increased drought stress tolerance and increased yield in all varieties as compared to other treatments. However, further research is needed in an open field condition with different rates of blended fertilizer on mass number of varieties before a generalized conclusion has been drawn.