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    • Journal of Range Management, Volume 42 (1989)
    • Journal of Range Management, Volume 42, Number 2 (March 1989)
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    Atrazine and fertilizer effects on Sandhills subirrigated meadow

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    Author
    Brejda, J. J.
    Moser, L. E.
    Waller, S. S.
    Lowry, S. R.
    Reece, P. E.
    Nichols, J. T.
    Issue Date
    1989-03-01
    Keywords
    subsurface irrigation
    atrazine
    Nebraska
    grasses
    
    Metadata
    Show full item record
    Citation
    Brejda, J. J., Moser, L. E., Waller, S. S., Lowry, S. R., Reece, P. E., & Nichols, J. T. (1989). Atrazine and fertilizer effects on Sandhills subirrigated meadow. Journal of Range Management, 42(2), 104-108.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644978
    DOI
    10.2307/3899304
    Additional Links
    https://rangelands.org/
    Abstract
    Many Nebraska Sandhills subirrigated meadows have shifted to predominantly cool-season grasses. Meadows are often cut in July when forage quality of cool-season is lower than that of warm-season species. The objective of this research was to evaluate a one-time application of atrazine [6-chloro-N-ethyl-N'-(1-methylethyl)-1,3,5-triazine-2,4-diamine] in restoring dominance of warm-season grasses and to determine if nitrogen (N) with and without phosphorus (P) would enhance or prolong the atrazine effect on species composition, yield, crude protein, and in vitro dry matter digestibility (IVDMD). Atrazine was applied once at 0, 2.2, and 3.3 kg/ha in spring or fall 1983 and 1984 to a Gannett fine sandy loam (coarse loamy mixed mesic Typic Haplaquoll). The year after atrazine application one-half of each spring-treated plot was fertilized with N (50 kg/ha). One-half of the fertilized area received P (18 kg/ha). Both spring and fall applied atrazine decreased cool-season grass species composition and yield. Spring-applied atrazine reduced first-year yields, but yields recovered by the end of the second year. Conversion of plots to warm-season grasses increased crude protein in mid-July for 2 growing seasons. Percentage IVDMD was increased the year of atrazine application on both sets of plots and also the year following application on the 1983-treated plots. A single fertilizer application did not enhance or prolong the effect of atrazine on forage quality. Cool-season grasses regenerated in atrazine-treated plots after 2 years so changes in yield and quality were only temporary, making atrazine use in subirrigated meadows uneconomical.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/3899304
    Scopus Count
    Collections
    Journal of Range Management, Volume 42, Number 2 (March 1989)

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