Effect of drip irrigation systems and water quantity on Growth, yield and water use efficiency of sweet potato plant grown under sandy soil conditions
2011
Abou El-Khair, El.E. | Nawar. D.A.S. | Anwar, R.S.E.
This research was carried out to evaluate the effect of drip irrigation systems; i.e., surface (SD), subsurface (SSD) and irrigation water quantities; i.e., 1000, 1500, 2000 and 2500 m3/fed., as well as their interactions on sweet potato plant growth, plant water relationships, water use efficiency (WUE) and root tuber yield and its quality under sandy soil conditions. All studied plant growth characters, free water, total water in leaves and N percentages in shoots as well as N, P and K uptakes by shoots were significantly enhanced by subsurface drip irrigation system. Also, it recoded significant increases in root tuber yield and its quality. While, (SD) significantly increased bound water percentage, cell sap, osmotic pressure, transpiration rate (TR) and proline amino acid content in leaves. The highest tested water quantity (2500 m3/fed.) recorded the maximum values for all plant growth traits, total and free water (%) in leaves, N, P and K contents and their uptakes by shoots, total tuber root yield/ plant and pier fed. as well as tuber root chemical constituents. While, 1000 m3 /fed. resulted in increases of bound water %, cell sap and osmotic pressure and proline amino acid. In addition, 2500 m3/ fed. as SSD irrigation system gave the highest values for all plant growth characters and recorded the highest yield quantity and quality.
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