Impact de diff.rentes doses d' irrigation par les eaux us.es .pur.es par infiltration percolation sur une culture de pomme de terre : Solanum tuberosum. R.ponse physiologiques et agronomiques.
2003
Alaoui S.M.
Francés. This work took place in the experimental plot of the wastewater treatment station of DRARGA to investigate the eco-physiological and agronomic responses of potato crop to four irrigation regimes: 120 percent ETM, 100percent ETM, 80 percent ETM and 60percent ETM. The crop adapted to each irrigation regime. The EC of the saturation extract increased from 1.86 dS/m respectively to 1.93; 1.96; 1.98 and 2.12 dS/m for the treatments 120 percent, 100 percent, 80 percent, and 60 percent ETM. The soil was richer in nitrogen and potassium but poor in phosphorus.The wastewater use reduced net photosynthesis rate and the transpiration rate. The osmotic potential reduced from -18,58 .0,61bar in 120 percent ETM treatment to -23,74.2,25 bar in 60 percent ETM treatment. The increased water application yielded larger leaf area, high fresh weight and greater water use efficiency. For 120 percent ETM regime, the quantity of leached nitrates was about 20 Kg/ha, thus representing a low potential hazard of groundwater pollution.
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