Full TGIF Record # 16961
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Web URL(s):https://dl.sciencesocieties.org/publications/aj/pdfs/82/1/AJ0820010009
    Last checked: 12/14/2016
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Publication Type:
i
Refereed
Author(s):Fales, S. L.; Hill, R. R.; Hoover, R. J.
Author Affiliation:Department of Agronomy, The Pennsylvania State University, University Park, PA
Title:Chemical Regulation of Growth and Forage Quality of Cool-Season Grasses with the Imazethapyr
Source:Agronomy Journal. Vol. 82, No. 1, January/February 1990, p. 9-17.
Publishing Information:Washington: American Society of Agronomy
# of Pages:9
Keywords:TIC Keywords: Imazethapyr; Neutral detergent fiber; Dactylis glomerata; Lolium perenne; Lolium multiflorum; Phalaris canariensis; Bromus inermis; Phleum pratense
Abstract/Contents:"Forage quality in cool-season grasses diclines rapidly in the spring primarily due to the production of relatively indigestible stem tissue. This study was conducted to evaluate the ability of the plant growth regulator, imazethapyr [5-ehtyl-2-(4-isopropyl-4-methyl-5-oxo-2- imidazolin-2-yl) nicotinic acid], to constrain losses in grass quality by reducing rated of neutral detergent fiber accretion and by maintaining levels of crude protein and in vitro dry matter disappearance. In 1986 and 1987 field plots of 'Pennlate' orchardgrass (Dactylis glomerata L.), 'Bison' ryegrass (Lolium perenne X L. multiflorum Lam.), 'Palaton' reed canarygrass (Phalaris arundinacea L.), 'Saratoga' smooth bromegrass (Bromus inermis Leyss.), and 'Toro' timothy (Phleum pratense L.) were treated with imazet hapyr, at rates of 0, 25, 50, and 100 g a.i. ha-1. Plots were sampled at weekly intrvals for 7 wk after imazethapyr application in the spring. Treated forage averaged between 36 and 71 g kg-1 lower in neutral detergent fiber, between 19 and 44 g kg-1 higher in vitro dry matter disappearance, and between 9 and 20 kg-1 higher in crude protien, depending on the level of imazethapyr applied. Improvements in quality were accompanied by corresponding dry matter yield reductions, which ranged between 0.8 and 2.8 Mg ha-1. Rates at which yield increased or quality decreased as the season prgressed were reduced by higher rates of imazethapyr application. Imazethapyr appears to be an effective tool for manipulating the growth and nutritive quality of cool-season grasses."
Language:English
References:13
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Fales, S. L., R. R. Hill, and R. J. Hoover. 1990. Chemical Regulation of Growth and Forage Quality of Cool-Season Grasses with the Imazethapyr. Agron. J. 82(1):p. 9-17.
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Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/82/1/AJ0820010009
    Last checked: 12/14/2016
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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