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    • Journal of Range Management, Volume 48 (1995)
    • Journal of Range Management, Volume 48, Number 4 (July 1995)
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    Yield and quality of RS-2, a quackgrass X bluebunch wheatgrass hybrid

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    Author
    Haferkamp, M. R.
    Adams, D. C.
    Borman, M. M.
    Grings, E. E.
    Currie, P. O.
    Issue Date
    1995-07-01
    Keywords
    ammonium nitrate
    Elytrigia repens
    Pseudoroegneria spicata
    hybrids
    irrigation
    cutting frequency
    digestibility
    crude protein
    growth rate
    Montana
    grasses
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    Citation
    Haferkamp, M. R., Adams, D. C., Borman, M. M., Grings, E. E., & Currie, P. O. (1995). Yield and quality of RS-2, a quackgrass X bluebunch wheatgrass hybrid. Journal of Range Management, 48(4), 362-369.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644506
    DOI
    10.2307/4002490
    Additional Links
    https://rangelands.org/
    Abstract
    Understanding the effect of defoliation frequency and N fertilization on plant growth, forage yield, and quality of RS-2, a quackgrass [Elytrigia repens (L.) Nevski.] x bluebunch wheat grass [Pseudoroegneria spicata (Pursh.) Love] hybrid, will help promote efficient use of this hybrid in livestock production systems. Plants were fertilized with 0, 112, or 224 kg N ha-1 in spring 1988 and 1989, or with a 112 + 112 kg N ha-1 split in spring and summer. One set of plants was unmowed or mowed to a 5cm stubble height once in July or August in 1988 and another set was mowed initially in May, June, July, August, September, or October 1989 and monthly thereafter through October. Peak standing crop of unmowed plants was 3,470 kg ha-1 in 1988 and 5,850 kg ha-1 in 1989. In 1989 yields of fertilized plants exceeded those of unfertilized plants by 1,000 kg ha-1. In 1988, crude protein exceeded 12% in unmowed forage and in 1989 varied from 20% in May to 8% in August. After fertilization, crude protein was increased by 2 to 4 percentage units in 1988 and by 2 percentage units in 1989, but fertilization had no effect on in vitro digestible organic matter. Regrowth contained more crude protein (15-22%) and digestible organic matter (29-40%) than unmowed forage. Sequential harvesting enhanced quality of regrowth, but standing crops did not exceed 350 kg ha-1; except in June 1989. Sixty percent of the accumulated yield was harvested with the first mowing during May through August. Plots harvested initially in September and October were only harvested once. Our findings indicate an increase in forage yield potential and forage quality of RS-2 after harvesting and fertilizing the RS-2 hybrid.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002490
    Scopus Count
    Collections
    Journal of Range Management, Volume 48, Number 4 (July 1995)

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