摘要
The Doukkala-Abda region covers an area of about 13,285 km^2 representing 1.87%of Morocco.The agricultural area is 428,000 ha of which 96,000 ha of large irrigation schemes,8,250 ha of private irrigation in coastal areas and 327,800 ha of rainfed agriculture.The two large irrigation perimeters of Doukkala are the low-service with an area of 61,000 ha and the high service with an area of 35,000 ha.Since the implementation of irrigation perimeter down service Doukkala,he experienced an imbalance both in the ground and water.At first,the state of the quality of soil Doukkala is not alarming.However,observation and comparison of test results between soils in different years seem significant on the evolution of soil quality parameters(organic matter,Phosphorus olsen,pH and salinity)under intensive farming practices.Practical measures for rehabilitation and prevention are to be taken immediately in order to identify these problems and prevent them from degeneration.The methodology for the realization of this work consists of sampling,measurements in situ and analysis of soil quality parameters.The analyses reveal that the soils of Doukkala are poor in organic matter and very rich in phosphorus,with an alarming rate of salinity evolution comparing the results of different years which must be taken into account to prevent the problem from occurring spread and preserve the soil.
