Contribution à l’évaluation de la teneur en matière organique des sols de la région de Ouargla

Abstract

Le présent travail a été entrepris dans le but de contribuer à l‟évaluation de la teneur en matière organique des sols de la région de Ouargla. Il est fondé sur l‟étude de la répartition de matière organique dans 13 stations (ITAS, Ain Beida, Chott, Balaa, Mekhadma, Sidi omrane, Bouameur, Said otba, ksar, Hassi Ben abdallah, Rouissat, Ifri, Aouinat Moussa) représentant deux milieux différents (Palmeraies et milieux naturels)dans la région de Ouargla.La matière organique a été quantatifiée par la méthode Walkley Black (méthode chimique). Les résultats obtenus indiquentque la matière organique a été différented'une station à l‟autre, mais montrent que la majorité des stations ont une très faible teneur ne dépassant pas 1% sauf une seule station de faible teneur 1,19 % (Ain Beida 5).Nous avous observé que la répartition de la teneur en matière organique au niveau de la région n‟est pas très différente dans les deux milieux étudiés, cela est dû à plusieurs facteurs,en particulier: les conditions climatiques et les caractéristiques du sol. The aim of this work was a contribution to the assessment of the contentof organic matter in soils of the Ouargla region. It is based on the study of the distribution of organic matter in 13 stations (ITAS, Ain Beida, Chott, Balaa, Mekhadma, Sidi omrane, Bouameur, Said otba, ksar, Hassi Ben abdallah, Rouissat, Ifri, Aouinat Moussa) representing two different environments (Palm groves and natural environments) in the Ouargla region. Organic matter was quantatified by the Walkley Black method (chemical method). The results obtained indicate that the organic matter was different from one station to another, but show that the majority of the stations have a very low content not exceeding 1% except for a single station of low content 1.19% (Ain Beida5). We have observed that the distribution of the organic matter content in the region is not very different in the two environments studied, this is due to several factors, in particular: climatic conditions and soil characteristics

The aim of this work was a contribution to the assessment of the contentof organic matter in soils of the Ouargla region. It is based on the study of the distribution of organic matter in 13 stations (ITAS, Ain Beida, Chott, Balaa, Mekhadma, Sidi omrane, Bouameur, Said otba, ksar, Hassi Ben abdallah, Rouissat, Ifri, Aouinat Moussa) representing two different environments (Palm groves and natural environments) in the Ouargla region. Organic matter was quantatified by the Walkley Black method (chemical method). The results obtained indicate that the organic matter was different from one station to another, but show that the majority of the stations have a very low content not exceeding 1% except for a single station of low content 1.19% (Ain Beida5). We have observed that the distribution of the organic matter content in the region is not very different in the two environments studied, this is due to several factors, in particular: climatic conditions and soil characteristics