Zein, F., Talha, N., Abou EI-Khir, A., EI- Sanafawy, H. (2005). EFFECT OF POTASSIUM FERTILIZATION ON RECOVERING DROUGHT HAZARDS ON SUGAR BEET CULTIVARS AT LATE SEASON. Journal of Soil Sciences and Agricultural Engineering, 30(10), 6357-6370. doi: 10.21608/jssae.2005.238243
F.I. Zein; N.I. Talha; A. M. Abou EI-Khir; Hamida M. A. EI- Sanafawy. "EFFECT OF POTASSIUM FERTILIZATION ON RECOVERING DROUGHT HAZARDS ON SUGAR BEET CULTIVARS AT LATE SEASON". Journal of Soil Sciences and Agricultural Engineering, 30, 10, 2005, 6357-6370. doi: 10.21608/jssae.2005.238243
Zein, F., Talha, N., Abou EI-Khir, A., EI- Sanafawy, H. (2005). 'EFFECT OF POTASSIUM FERTILIZATION ON RECOVERING DROUGHT HAZARDS ON SUGAR BEET CULTIVARS AT LATE SEASON', Journal of Soil Sciences and Agricultural Engineering, 30(10), pp. 6357-6370. doi: 10.21608/jssae.2005.238243
Zein, F., Talha, N., Abou EI-Khir, A., EI- Sanafawy, H. EFFECT OF POTASSIUM FERTILIZATION ON RECOVERING DROUGHT HAZARDS ON SUGAR BEET CULTIVARS AT LATE SEASON. Journal of Soil Sciences and Agricultural Engineering, 2005; 30(10): 6357-6370. doi: 10.21608/jssae.2005.238243
EFFECT OF POTASSIUM FERTILIZATION ON RECOVERING DROUGHT HAZARDS ON SUGAR BEET CULTIVARS AT LATE SEASON
Two field experiments were carried out during 2003 I 2004 and 2004/2005 growing seasons at Sakha Agric. Res. Station, Kafr EI-Sheikh Governorate to study yield and quality characters and some water relations of two sugar beet cultivars; Mezanopoly and Top as affected by three irrigation regime treatments W1 full irrigation which received planting plus seven irrigations, W2 withholdihg one irrigation and W3 withholding two irrigations at late season and three levels of potassium fertilization 24, 48 and 72 Kg K20 Ifed. It aimed at maximizing sugar beet production and water use efficiency. The experiments were conducted in split-split plot design, with four replicates. The observed results can be summarized as follows:
Water consumptive use was the highest with the treatment under full irrigation regime, where it was 63.99 and 66.92 ern in 2004 and 2005. While it was the lowest with the W3 treatment, 51.34, and 53.35 ern in 2004 and 2005. The daily water consumptive use grc1dually increased to reach its maximum at Apr. 0.53 and 0.55 cm/day in 2004 and 2005 which was obtained with irrigation treatments of W1 and W2.
The highest values of W.U.E. for root yield 9.56 and (9.37 kg root beet! m3 water in 2004 and 2005) were obtained With Top cultivar under irrigation treatment W3 and apply-ing of 48 kg K~O/fed and W.U.E. for gross sugar yield (1.16 and 1.30 kg sugar 1m3water in 2004 and 2005) was found with Top cultivar under irrigation treatment Wi and using 48 Kg K20 Ifed.
The highest values of root yield; 60.67 and 62.18 ton/ha in 2004 and 2005 were obtained with Top cultivar under irrigation treatment W1 and adding 24 kg K20/fed. The highest values of sucrose 15.25 and 16.75 % in 2004 and 2005 and the highest values of Purity % (66.69 and 68.20 % in 2004 and 2005) were obtained with Mezano-poly variety under irrigation treatment W1 and 57 Kg K20/ha. The greatest gross sugar yield; 7.57 and 8.56 ton/ha in 2004 and 2005 was obtained with Mezano- poly cultivar under irrigation treatment W1 and adding 24 Kg K20 I fed. in the two seasons. The highest values of white sugar yield (10.16 and 11.66 % in 2004 and 2005) were obtained with Mezaho-poly cultivar under full irrigation and using 24 Kg K20 Ifed. The data indicated that optimum potassium decreased the hazards effects of drought on sugar beet crop at late growing season under the field studied conditions.
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