Issolah R.,Laboratoire des Ressources Phytogenetiques |
Tahar A.,Annaba University |
Derbal N.,Annaba University |
Zidoun F.,Laboratoire des Sols |
And 9 more authors.
Revue d'Ecologie (La Terre et la Vie) | Year: 2012
As part of the evaluation and enhancement of plant genetic resources of fodder and pastoral interest in Algeria, a study of the ecological characterization of the natural habitat of Sulla coronaria (L.) Medik. (Syn. Hedysarum coronarium L., Fabaceae) was carried out in Northeastern Algeria. Following a collecting mission, 36 sites of Sulla were randomly selected. In each site, three soil samples were randomly collected. Sixteen soil parameters (soil pH, electrical conductivity, total limestone, total nitrogen, potassium, phosphorus, carbon, organic matter, the C/N ratio and particle composition) were analysed. Two factors related to topography (altitude) and climate (rainfall) of the natural habitat of S. coronaria were also considered. Variance analyses (univariate and multivariate) showed a high variation of the physical and chemical characteristics between the different sites. The pH varies between 8.1 and 8.94. In most cases, soils were characterized by a clayey texture, but the species may also adapt to other types of texture (clayey loam, silty clay loam, silty clay, silty). Cluster analysis highlighted five groups of sites. The altitude and rainfall seem to play a prominent part in the formation of these groups. Relations have also been found between certain characteristics of the soil and between altitude and rainfall in the natural habitat of the species. The effect of altitude seems to be more pronounced. This study will contribute to valorize and develop S. coronaria in the marginal, isolated and deprived areas where fertilizers are not economically advisable.