DYNAMICS OF PHOSPHORUS IN SOIL-PLANT SYSTEM (CASE OF HARD WHEAT) IN AGROCLIMATE CONDITIONS SAHARAN

A MIHOUB; H CHELOUFI; N BOUKHALFA-DERAOUI

A MIHOUB Département des Sciences Agronomiques – Université Kasdi Merbah Faculté des Sciences de la Nature et de la Vie et Sciences de la terre et de l’Univers Ouargla 30000 (Algérie)
H CHELOUFI Université KASDI MERBAH Ouargla Laboratoire de Protection des Ecosystèmes en Zones Arides et Semi Arides - Faculté des Sciences de la Nature et de la Vie et Sciences de la terre et de l’Univers, Ouargla 30000 (Algérie)
N BOUKHALFA-DERAOUI Université KASDI MERBAH Ouargla. Laboratoire Bio-ressourcesSahariennes : Préservation et Valorisation. Faculté des Sciences de la Nature et de la Vieet Sciences de la terre et de l’Univers Ouargla 30000 (Algérie)

Keywords: Phosphorus, Phosphorus fertilizer, Durum wheat, Fertilization, Sahara, Algeria

Abstract

This experiment is part of a research program on the fertilization of durum wheat grown under center pivot in Saharan soil and climatic conditions. This work research for the type of phosphorus fertilizer (MAP, Fosfactyl and SSP) and dose (30, 60 and 90 units/ ha) to suggest in these conditions and appreciate the influence of phosphorus fertilization on of nitrogen exportations. The principal results demonstrate that the behavior of culture varies with the nature of the phosphorus fertilizer used. So the economic parameters andquality of the product will specify the dose and the type of fertilizer to be used; the maximum yield is approximately 6,9 t.ha -1 was obtained by the interaction Fosfactyl*(60 P2O5.ha -1 units). The yields are very strongly related to potash exports by the crop, and increase according to the quantities of exported K 2O (R =0.82***).