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Accueil du site → Master → Etats Unis → 2007 → Potential of basalt milkvetch (Astragalus filipes Torr. ex A. Gray) populations and rhizobial strains for revegetation and restoration of Intermountain West rangelands

UTAH STATE UNIVERSITY (2007)

Potential of basalt milkvetch (Astragalus filipes Torr. ex A. Gray) populations and rhizobial strains for revegetation and restoration of Intermountain West rangelands

Bhattarai, Kishor

Titre : Potential of basalt milkvetch (Astragalus filipes Torr. ex A. Gray) populations and rhizobial strains for revegetation and restoration of Intermountain West rangelands

Auteur : Bhattarai, Kishor

Université de soutenance : UTAH STATE UNIVERSITY

Grade : Master of Science (MS) 2007

Résumé
Astragalus filipes Torr. Ex A. Gray (basalt milkvetch) is a legume that grows widely in western North America. Greenhouse and field experiments were conducted to identify rhizobial strains and accessions of basalt milkvetch for use in rangeland revegetation and restoration programs. Plants inoculated with rhizobial strain I-49 had the greatest nodule weight and number of nodules compared to plants inoculated with other rhizobial inocula. Results from two field studies showed that accessions from north central Oregon exhibited high biomass and seed yields. Significant differences among basalt milkvetch accessions were observed for crude protein concentration, neutral detergent fiber, acid detergent fiber, and seed weight per 100 seeds. Significant seed predation was observed in 2006, but not in 2005, which could be due to high seed yields and greater numbers of seed predators in 2006. Rhizobial strain I-49 and accessions from north central Oregon have particular promise for plant improvement programs.

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Page publiée le 7 décembre 2015, mise à jour le 6 décembre 2018