Title page for ETD etd-07062000-17330011


Type of Document Master's Thesis
Author El Hadj, Meriem
URN etd-07062000-17330011
Title Compatibility, Yield, and Quality of Warm-Season Grass-Legume Mixtures.
Degree Master of Science
Department Crop and Soil Environmental Sciences
Advisory Committee
Advisor Name Title
McKenna, James R. Committee Co-Chair
Peterson, Paul R. Committee Co-Chair
Parrish, David J. Committee Member
Keywords
  • Caucasian bluestem
  • quality
  • hay
  • yield
  • pasture
  • compatibility.
  • switchgrass
  • legumes
Date of Defense 2000-06-09
Availability unrestricted
Abstract
The lack of consistent summer pasture supply is a major limitation to livestock production in the mid-Atlantic region. Perennial warm-season grasses might provide a solution if managed for high quality. Experiments were conducted on separate well-established stands of Caucasian bluestem and 'Cave-in-Rock' switchgrass at the Kentland Farm near Blacksburg, VA. Stages of grass maturity at harvest simulating pasture and hay systems were tested. Six interseeded legume species and two grass monoculture checks, one with 56 kg N/ha applied in spring and after each harvest, the other with no N, were imposed as sub-plots. Legume species included alfalfa, red clover, sericea lespedeza, annual lespedeza, Illinois bundleflower, and purple prairieclover. Inter-seeded legumes contributed a significant amount to yield and quality of perennial warm-season grasses in the legume-establishment year. In the year after establishment, grass mixtures with alfalfa, red clover, and, for switchgrass, sericea lespedeza yielded as much forage as N-fertilized grasses. Alfalfa and red clover altered the distribution of yield of the grasses, and may not be as compatible with perennial warm-season grasses as sericea lespedeza in the long-term. Interseeded legumes improved quality considerably in the second year.
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