PRELIMINARY GUIDELINE FOR YIELD RESPONSE TO SALINITY AND SODICITY OF IRRIGATION WATER | ||
| Journal of Soil Sciences and Agricultural Engineering | ||
| Article 2, Volume 32, Issue 10, October 2007, Pages 8757-8765 PDF (724.49 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jssae.2007.201548 | ||
| Author | ||
| M.M. Ragab | ||
| Soil, Water and Environment Res. Inst .A.R.C. Egypt | ||
| Abstract | ||
| The objective of this study was achieve preliminary Guideline of tolerance of barley, maize and wheat as a field crops and cucumber, pepper and tomato as vegetable crops to salinity and sodicity of irrigation water . Lysimeter experiments, using sand culture were curried out by cultivating field crops while plastic greenhouse was curried out using clay soil cultivated vegetable crops (cucumber, pepper and tomato ). These crops were transplanted and irrigated by saline water with different ECw values under two levels of SAR ( 7&14) for field crops and SAR7 for vegetable crops under North Delta climatic conditions. Linear equations of different crops indicated that, the relative yield decrease ( %) with increasing unit of ECw were 5.243 , 14.391, 8.187, 16.453 , 15.95 and 11.105 % for barley , wheat, maize, cucumber, pepper and tomato, respectively under SAR 7. Also, increasing the SAR of irrigation water to 14 increased the adverse effect of ECw on the crop yields according to their tolerance to salinity of irrigation water. The crops under consideration could be arranged in the descending order,:- Barley >wheat > maize for field crops and tomato < pepper <cucumber for vegetable crops. The multiple regression equations described the combined effect of ECw and SARw on field crop yields were as follows: Yield decrement % = -14.238+5.243 ECw + 0.336 SARw (Barley), = 1.322 + 14.391ECw + 0.288 SARw (Maize) , and = -20.017 + 8.187ECw+ 0.528 SARw (Wheat). The simple regression for vegetable were as follows : Yield decrement % = -12.192 + 16.453 ECw (Cucumber), =-10.779 + 15.952 ECw (Pepper),and = -9.688 + 11.105 ECw (Tomato) | ||
| Keywords | ||
| Guideline; Irrigation water; Salinity; Sodicity | ||
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