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    • Rangeland Ecology & Management, Volume 64 (2011)
    • Rangeland Ecology & Management, Volume 64, Number 5 (September 2011)
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    Defoliation Effects on Herbage Production and Root Growth of Wet Meadow Forage Species

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    Author
    Volesky, Jerry D.
    Schacht, Walter H.
    Koehler, Ann E.
    Blankenship, Erin
    Reece, Patrick E.
    Issue Date
    2011-09-01
    Keywords
    birdsfoot trefoil
    defoliation frequency
    defoliation intensity
    Nebraska sedge
    root distribution
    root length
    root surface area
    root weight
    slender wheatgrass
    
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    Citation
    Volesky, J. D., Schacht, W. H., Koehler, A. E., Blankenship, E., & Reece, P. E. (2011). Defoliation effects on herbage production and root growth of wet meadow forage species. Rangeland Ecology & Management, 64(5), 506-513.
    Publisher
    Society for Range Management
    Journal
    Rangeland Ecology & Management
    URI
    http://hdl.handle.net/10150/642896
    DOI
    10.2111/REM-D-10-00010.1
    Additional Links
    https://rangelands.org/
    Abstract
    Root growth is important to the competitive ability of plants, and understanding how herbage defoliation affects root growth has implications for development of management strategies. Objectives were to determine the effects of defoliation intensity and frequency on root characteristics and herbage production of slender wheatgrass (Elymus trachycaulus [Link.] Shinners), Nebraska sedge (Carex nebrascensis C. Dewey), and ‘‘Steadfast’’ birdsfoot trefoil (Lotus corniculatus L.). Plants of each species were transplanted into containers that had been placed in the ground at wet meadow field sites the prior year. There were eight replications of a control and five defoliation treatments, which were combinations of different frequencies (two or five times) and intensities (light or heavy) and haying. Treatments were applied for a single growing season, and aboveground biomass was collected. Containers were extracted in October, and plant crowns, rhizomes, and roots were separated from the soil. Defoliation treatment did not affect total root weight, length, and surface area of Nebraska sedge or birdsfoot trefoil (P > 0.10). Slender wheatgrass total root weight was less when defoliated five times (4.46 g container-1) than when defoliated twice (6.62 g container-1) during the growing season. More frequent defoliation of slender wheatgrass also reduced length (20%) and surface area (21%) compared to less frequent defoliation. However, defoliation frequency did not affect aboveground biomass. Defoliation intensity did not affect aboveground production or root characteristics of the three species. Abundant soil moisture in meadows likely buffers negative effects of defoliation. For all species, two defoliation events (e.g., haying followed by grazing) does not appear to negatively affect root growth and herbage production.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2111/REM-D-10-00010.1
    Scopus Count
    Collections
    Rangeland Ecology & Management, Volume 64, Number 5 (September 2011)

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