EFFECT OF WATER REGIME AND POTASSIUM FERTILIZER LEVELS ON YIELD OF SOYBEAN AND WATER USE EFFICIENCY AT NORTH DELTA | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 5, Volume 30, Issue 12, December 2005, Page 8293-8302 PDF (128.09 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2005.238832 | ||||
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| Authors | ||||
| M.M. Saied; H.A. Shams El-Din; E.H. Omar; A.A.S. Gendy | ||||
| Soils, Water and Environment Res. Inst., Agric. Res. Center, Egypt | ||||
| Abstract | ||||
| Two field experiments were carried out at saxna Agric Res. Station In 2004 and 2005 seasons to study the effect of different soil moisture depletion, 35, SO and 65% and potassium fertilizer levels; untreated 24 and 48 kg K201fed. on soybean yield, some water relations and N, P, K concentrations of seeds. The obtained results revealed that the Irrigation at 50% soil rnorsture depletion surpassed the other two depletions (35 and 65%) in increasing the seed yield of soybean by 6.37 and 14.29% in the 1.1 season and 9.09 and 16.59 in the 2nd season. Application of 48, kg K20lfed. increased seed yield by 21.53 and 13.23% than application of 0.0 and 24 kg K20lfed. in the 1" season. While, in the 2nd season the seed yield increased by 21.43 and 10.36%. The greatest amounts of water consumptive use were found to be 2007 43 and 1981 83 mJ/fed in the ," and 2nd seasons respectively under 35% depletion The most suitable water applied throughout the two seasons are 2646 4 and 24907 mJ/fed in the 1" and 2M seasons under irrigation 50% depletion of available soil moisture which produced the greatest seed Yield. The highest values of crop water use and field water use efficiencies were achieved from interaction between irrigation at 50% depletion of available soil moisture and application of 48 kg K20lfed. in both seasons. | ||||
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