Caractéristiques physico-chimiques des sols rhizosphériques cultivés d'arachide (Arachis hypgaea L.) dans la région de Ghardaia (cas de sebseb)

Abstract

This study focuses on the analysis of the physicochemical characteristics of rhizospheric and non-rhizospheric cultivated groundnut soils (Arachis hypgaea L.) in the Ghardaïa region, case of Sebseb. It aims to compare the two soils in order to understand the effect of cultivation on soil quality improvement. The results showed that the majority of the soils were moderately alkaline (pH 8.05), with 20% of the samples in the pH range of 5.5 to 7.5. Salinity degradation was minimal and only 6.6% of the samples had electrical conductivity (EC) values greater than 1 dS m 1. The calcium carbonate content showed that the soils were moderately calcareous with an average of 6.5%. Soils were poor in organic matter (OM), only 3.3% of soils had organic matter levels above 2%. For potassium and sodium, their presence in the soil studied was moderate (SR64.01393, SNR64.52691) and (SR 98.77868, SNR 96.71689). For phosphorus, its presence in rhizospheric soil was higher than in non-rhizospheric soil (SR 61.87074, SNR56.25754). We noted that rhizospheric soil contains a higher total nitrogen (NT) concentration than non-rhizospheric soil (SR 0.04780574, SNR 0.02267073. Indeed, the T-Student Test results show significant disparities at the significance threshold α = 0.05 between the two soil types studied. The results of the correlation analysis showed the existence of positive correlations between pH and soluble potassium (KS) as well as between electrical conductivity (CE) and total and soluble sodium. On the other hand, there are significant negative correlations between pH/MO, MO/KS and pH/NT parameters