ROLE DE LA COMPOSITION CHIMIQUE ET BIOCHIMIQUE DES RÉSIDUS DES CULTURES ET DE FUMIER DE FERME DANS LA DÉCOMPOSITION DES SOLS DÉGRADÉS SOUS CLIMAT ARIDE TUNISIEN
Abstract
- Four crop residues (tops and roots) of sulla (Hedysarum coronarium L.), rapeseed (Brassica napus L.), faba bean [Vicia faba L. var. Minuta (Desf. Ex. Alef.) Mansf.] and durum wheat (Triticum durum Desf.) were chemically characterized and compared against the bovin manure used as a Control. Residues and manure were applied in a minimum amount restituted or supplied in unproductive year under natural conditions, on two different Tunisian soils: a clay loam soil from the Mornag Region belonging to the Ben Arous governorate in the north of Tunisia and a sandy soil from the region Benikhdech belonging to the governorate of Medenine in southern Tunisia. Aerobiosis incubation was realized at a constant temperature of 28°C during 90 days with a humidity adjusted to 2/3 of field capacity (Θcc). The analysis of the fibers sho wed that the Fabaceae residues (sulla and field bean) were characterized by the highest cellulose levels corresponding to 35.43% and Rôle de la composition chimique et biochimique des résidus des cultures et de fumier de ferme dans la décomposition des sols dégradés sous climat aride tunisien