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Universiteit Gent (2004)

EFFECT OF ACACIA NILOTICA TREES ON SALT AFFECTED SOILS OF THE MIDDLE AWASH RIVER BASIN, ETHIOPIA

Tesfa Kelemewerk Tegegn

Titre : EFFECT OF ACACIA NILOTICA TREES ON SALT AFFECTED SOILS OF THE MIDDLE AWASH RIVER BASIN, ETHIOPIA

Auteur : Tesfa Kelemewerk Tegegn

Université de soutenance : Universiteit Gent

Grade : Master of Science (MS) Physical Land Resources 2004

Résumé
Effects of Acacia nilotica trees on properties of salt-affected soils were studied. Soil samples were taken at locations under and beyond tree canopies at 0 – 15 cm, 15 – 30 cm, 30 – 45 cm and 45 – 60 cm depths. Electrical conductivity (EC), pH, soluble salts, exchangeable cations, CEC, organic carbon (O.C), total nitrogen, and soil texture was compared across locations and along soil depths. The EC, SO42-, Cl-, clay and silt particles, O.C, exchangeable Ca2+ and CEC were significantly different across locations. The EC increased with soil depth from 1.06 – 4.60 dSm-1 under tree and it decreased from 6.03 – 5.91 dSm-1 beyond tree. The ESP increased with soil depth under and beyond tree canopies from 2.31% – 8.67 % and 7.18% – 8.80% respectively. When soils under tree were compared with soils beyond tree locations, clay content increased by 8.25% and silt content decreased by 9.7 %

Source : Pedon 15 - Physical Land Resources - Universiteit Gent

Page publiée le 24 décembre 2015, mise à jour le 26 mai 2018