Contribution À L’étude De L’effet De La Fertilisation Azotée-potassique Sur Pomme De Terre (solanum Tuberosum L. Var Condor) Dans La Région Du Souf

Résumé: The purpose of this work is to study the combined effect, of four nitrogen amounts (0, 60,120 and 240 U/ha) with four potassium amounts (0, 90, 180,270 U/ha) on the potato culture (CONDOR variety) in three stages (vegetative stage of growth, stage of tuberization and stage of maturation) control under system pivot (local manufacture) in the area of souf. The results obtained show that the effect of nitrogen is positive on the parameters of measurements of the air part (a number of stems/plant, a number of sheets/plant and the languor of the stems). On the other hand potassic manure does not influence in a positive way these parameters. Nitrogenize-potassic fertilization A reacts positively on the parameters of output (the underground part) (average Weight of the tubers , gauge of the tubers and in end the output). The best output of 34.02 t/ha is obtained with the treatment 120U/ha of nitrogen and potassium 180U/ha. Following our tests, we noted that the majority of the parameters studied with knowing the content N and K in the air and underground part are improved by the contribution of nitrogenize-potassic manure. The nitrogenize-potassic fertilization caused an enrichment of the surface part (0- 20cm) of the ground out of N and K assimilable.

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