Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → États-Unis → 1972 → INFLUENCE OF MESQUITE, PALO VERDE, AND SAGUARO ON SOIL CHEMICAL PROPERTIES

University of Arizona (1972)

INFLUENCE OF MESQUITE, PALO VERDE, AND SAGUARO ON SOIL CHEMICAL PROPERTIES

Loqa, Harith Jabbouri

Titre : INFLUENCE OF MESQUITE, PALO VERDE, AND SAGUARO ON SOIL CHEMICAL PROPERTIES

Auteur : Loqa, Harith Jabbouri,

Université de soutenance : University of Arizona

Grade : Doctor of Philosophy (PhD) 1972

Résumé
Effects of stemflow, crown drip, leaf litter, bark litter, and grasses under the canopy of the palo verde and the mesquite on the chemical properties of the Cat Mountain, the Anthony, the Sonoita, and the Tres Hermanos soils were investigated. Effects of stemflow and bark litter of the saguaro on the chemical properties of the Cat Mountain and the Tres Hermanos soils were investigated. Chemical analyses were made on horizons from soil profiles at thi-ee distances from the stem, under the canopy, and out of the influence of the palo verde and the mesquite. Chemical analyses were made on horizons from soil profiles at two distances from the stem : next to the stem and out of the influence of the saguaro. Data were subjected to analysis of variance. The order of abundance of the Ca, Mg, K, and Na content in the leaves and barks of the palo verde and the mesquite were : Ca = Mg > K > Na. The order of the abundance of these elements in the barks of saguaro were : Mg > Ca > K > Na. There were increases inward toward the stem of the palo verde in organic C, total N, exchangeable K, water soluble Ca, Mg, K, and Cl in the A1 and D2 horizons. There were increases inward toward the stem of the palo verde in exchangeable Ca, exchangeable Mg, cation exchange capacity, permanent charge cation exchange capacity, pH-dependent charge cation exchange capacity, cation exchange capacity without organic matter, and HCO^ in the A1 horizons ; and inward decreases in exchangeable Ca, exchangeable Mg, cation exchange capacity, pH-dependent charge cation ex change capacity, and cation exchange capacity without organic matter in the D2 horizons. There were increases inward toward the stem of the mesquite in organic C, total N, exchangeable K, cation exchange capacity, permanent charge cation exchange capacity, pH-dependent charge cation exchange capacity, water soluble Ca, Mg, K, and CI ; and .inward decreases in exchangeable Ca, exchangeable Mg, and cation exchange capacity without organic matter in the A1 and B2 horizons. There were increases inward toAvard the stem of the mesquite in HCO^ only in the A1 horizons. Organic C, total N, exchangeable K, water soluble Ca, Mg, K, and CI were higher next to the stem of the saguaro, while pH and exchangeable Mg were lower next to the stein in the A1 and B2 horizons. Clay content, exchangeable Ca, permanent charge cation exchange capacity, and cation, ex change capacity without orgajiic matter were lower next to the stem of the saguaro in the A1 horizons ; clay content, exchangeable Ca, cation exchange capacity ; pH-depeJident cation exchange capacity, cation exchange capacity without organic matter were higher next to the stem in 132 horizons

Présentation

Version intégrale (4,43 Mb)

Page publiée le 23 février 2018