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Accueil du site → Master → Etats Unis → 1984 → ESTABLISHMENT OF RANGE GRASSES ON VARIOUS SEEDBEDS AT FOUR (LARREA TRIDENTATA) SITES IN CHIHUAHUA, MEXICO AND ARIZONA, USA

University of Arizona (1984)

ESTABLISHMENT OF RANGE GRASSES ON VARIOUS SEEDBEDS AT FOUR (LARREA TRIDENTATA) SITES IN CHIHUAHUA, MEXICO AND ARIZONA, USA

Martin Rivera, Martha Hortencia

Titre : ESTABLISHMENT OF RANGE GRASSES ON VARIOUS SEEDBEDS AT FOUR (LARREA TRIDENTATA) SITES IN CHIHUAHUA, MEXICO AND ARIZONA, USA

Auteur : Martin Rivera, Martha Hortencia

Université de soutenance : University of Arizona

Grade : Master of Science 1984

Résumé
Three chemical and four mechanical seedbed preparations were seeded with seven range grasses sown by hand broadcasting and by drilling with a Rangeland drill during two summers (1981 and 1982) at four Larrea tridentata sites in the Chihuahuan and Sonoran Deserts. Chemical treat ments were tebuthiuron at rates of 0.5, 1.0 and 1.5 kg a.i./ha. Mecha nical treatments were land imprinting, two-way railing, disk plowing and disk plowing plus contour furrowing. Seeded grasses were Lehmann lovegrass, A-68 ; Boer lovegrass, A-84 and Catalina ; Cochise lovegrass ; kleingrass, Selection-75 ; sideoats grama, Premier and buffelgrass. Generally, disk plowed and disk plowed plus contour furrowed plots had the greatest stand densities and forage production at all locations in both years of seedings on hand broadcast and drill seeding. Land imprinted, two-way railed and herbicide plots had the least stand densi ties and forage production at all locations. However, two-way railed plots under favorable moisture conditions at the Santa Rita had better stand densities than land imprinted plots. Kleingrass, buffelgrass, sideoats grama, Cochise lovegrass, and Catalina Boer lovegrass had the greatest stand densities, but buffelgrass and Cochise lovegrass had the highest forage production on hand and drill plots.

Mots clés : Range plants – Arizona – Pima County. ; Range plants – Arizona – Tucson Region. ; Range plants – Mexico – Chihuahua (State) ; Rangelands – Revegetation – Arizona – Pima County. ; Rangelands – Revegetation – Arizona – Tucson Region. ; Rangelands – Revegetation – Mexico – Chihuahua (State) ; Revegetation – Arizona – Pima County. ; Revegetation – Arizona – Tucson Region. ; Revegetation – Mexico – Chihuahua (State)

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