Gabr,, S., Ghoneim, I., EI-Khatib, H. (2002). EFFECTS OF SOIL .WATER MATRIC POTENTIAL (SWMP) ON GROWTH, YIELD AND QUALITY OF TWO POTATO CULTIVARS.. Journal of Plant Production, 27(2), 1212-1220. doi: 10.21608/jpp.2002.253328
S. M. Gabr,; I. M. Ghoneim; H. A. EI-Khatib. "EFFECTS OF SOIL .WATER MATRIC POTENTIAL (SWMP) ON GROWTH, YIELD AND QUALITY OF TWO POTATO CULTIVARS.". Journal of Plant Production, 27, 2, 2002, 1212-1220. doi: 10.21608/jpp.2002.253328
Gabr,, S., Ghoneim, I., EI-Khatib, H. (2002). 'EFFECTS OF SOIL .WATER MATRIC POTENTIAL (SWMP) ON GROWTH, YIELD AND QUALITY OF TWO POTATO CULTIVARS.', Journal of Plant Production, 27(2), pp. 1212-1220. doi: 10.21608/jpp.2002.253328
Gabr,, S., Ghoneim, I., EI-Khatib, H. EFFECTS OF SOIL .WATER MATRIC POTENTIAL (SWMP) ON GROWTH, YIELD AND QUALITY OF TWO POTATO CULTIVARS.. Journal of Plant Production, 2002; 27(2): 1212-1220. doi: 10.21608/jpp.2002.253328
EFFECTS OF SOIL .WATER MATRIC POTENTIAL (SWMP) ON GROWTH, YIELD AND QUALITY OF TWO POTATO CULTIVARS.
1Dept. of Hort. Fac., of Agric. Damanhour, Alex. Univ.
2Dept. of Veget. Fac., of Agric., EI-Shatby, Alex.Univ.
Abstract
Two field experiments were carried out during the summer seasons of 2000 and 2001. The objective of this study was to investigate the effects of soil water matric potential (SWMP) treatments (-35, -45, -55, -65 and -75 J.kg- 1) on vegetative growth, yield and quality of the two potato cultivars Diamant and Dra~a. The obtained results of the two seasons showed that irrigation at - 55 J.kg- was superior and significantly increased plant height, leaf area, foliage fresh and dry weights, average tuber weight and tuber yield, compared with the other four SWMP treatments. Results showed also that the lowest SWMP (-75 J.kg-1) decreased the previous mentioned parameters more than the highest one (-35 J.kg-\ Dry matter, starch and specific gravity of tubers increased significantly as the SWMP treatments decreased, while total sugars decreased by increasing SWMP. There were some insignificant differences on nitrogen, phosphorus and potassium contents due to SWMP treatments. The cultivar Diamant showed higher mean values of plant height, leaf area, foliage fresh and dry weights, average tuber weight and total tuber yield, compared with Draga cultivar. Tubers' quality;in terms of dry matter, starch, total sugars and nitrogen contents; appeared significantly better for Diamant than Draga. The greatest response in terms of vegetative growth, yield and quality of potato were obtained when Diamant cultivar was irrigated at -55 J.kg·1 SWMP
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