Le présent travail est une contribution à l’amélioration de la fertilité des lixisols de la localité de Sanguéré Paul (Nord Cameroun) avec le biochar et la poudre des balles de riz. Pour ce faire, la poudre (Ф ≤ 2 mm) a été obtenue par broyage et tamisage des balles de riz et le biochar (Ф ≤ 2 mm) par carbonisation des balles de riz à l’aide d’un four artisanal. Les deux produits ont été appliqués sur un lixisol appauvri suivant un dispositif expérimental en pots constitué de trois traitements chacun : le sol témoin (ST), le sol témoin mélangé à 200 g du biochar (ST + B) et le sol témoin mélangé à 200 g de la poudre (ST + P). Chaque traitement a été répété trois fois et les paramètres physico-chimiques ont été évalués pendant 0, 1, 2 et 4 mois. Les analyses physico-chimiques du lixisol composite indiquent une forte acidité (pH = 5,4). La poudre utilisée est riche en carbone organique (CO = 38,55 %) et le biochar riche en potassium (2,43 %), en magnésium (0,40 %) et en carbone organique (40,9 %). L'application de 20 % du biochar et de la poudre a amélioré les propriétés chimiques du lixisol : le pH passe d'acide (5,4) à faiblement acide (6,5 avec la poudre) et neutre (7,2 avec le biochar); le taux de saturation, ainsi que la somme des bases échangeables et la capacité d'échange cationique ont augmenté.Le biochar et la poudre des balles de rizcontribuent donc à réhabiliter la fertilité chimique des sols dégradés.
AMÉLIORATION DE LA FERTILITÉ D’UN LIXISOL AVEC LES BALLES DE RIZ À SANGUÉRÉ PAUL (Nord-Cameroun)
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Country:
Cameroun
Volume & Issue:
Volume 05, Issue 05, May 2023
Page No:
4497-4500
Abstract:
KeyWords:
fertilité chimique, sol, biochar, balles de riz, Sanguéré Paul.