RISKS OF PROLONGED DRAINAGE WATER USE IN CLAY SOILS IN NORTH DELTA, Egypt | ||
| Journal of Soil Sciences and Agricultural Engineering | ||
| Article 6, Volume 30, Issue 12, December 2005, Pages 8303-8312 PDF (137.8 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jssae.2005.238834 | ||
| Author | ||
| A.A.S. Gendy | ||
| Soil, Water and Environment Research Institute, ARC, Egypt | ||
| Abstract | ||
| Two clay soils differed In their irrigation water resources were chosen and wheat (Sakha 61 variety) was planted during 2002/2003 season. The first soli (soil 1) usually irrigated with Nile water, while the second (soil 2) located In the terminal end of irrigation canal and irngated with drainage water 10 years ago The objectives were subjected to look upon and evaluate the effects of long-term Irrigation with marginal drainage water on some sou chemical and physical proprieties, wheat growth, yield and heavy metals content of soil and wheat plants. The obtained results showed that long-term reuse of marginal drainage water in irrigating (soil 2) resulted in a remarkable increase in scil salinity and scdrclty as compared to soil 1 These values siightly increased more after wheat harvest than before plan:ing Total water stable aggregates (TWSA) > 025 rnrn mean weight diameter' (MWD), optimum size (;f aggrega~ion (OSA %), structure coe'ficient (SC) and aggregation Index (AIJ 'Nerf' lower .n SOil (2) tnan SOil (1) before planting These values deer eased after wheat harvest and the reduct' In was more pronounced in soil (2). DTPA-extractable micro-nutrients (Fe, Mn and ':'J) and heavy metals (Pb, Cd and Ni) recorded r,igher values in soli (2) than sorl (1) before wheat planting and slightly increased in soil (2) after wheat harvest. Data also showed that wheat growth parameters and yield component such as number of tillers, number of spikes, maximum grovllh dry weight, biological yield, straw yield, grain yield/plant were markedly reduced in soil (2). The heavy metals (Fe, Mn, Cu, Pb, Cd and Ni) content (mg/kg dry mater) of wheat straw and grains increased in soil (2) than soil (1) and were higher In straw than grains Special soil and water management practices should be followed when the farmers were obliged to reuse marginal drainage water for irrigation to reduce the hazard effects on SOil. plant qrowth, yield c;uantity and quality, as well as, mankind ;',ealth | ||
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