Full TGIF Record # 82725
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Web URL(s):http://www.tandfonline.com/doi/pdf/10.1081/PLN-120014064
    Last checked: 11/04/2015
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Publication Type:
i
Report
Author(s):Suplick, M. R.; Read, J. C.; Matuson, M. A.; Johnson, J. P.
Author Affiliation:Suplick: Department of Horticulture and Landscape Architeture, Colorado State University, Fort Collins, CO; Read: Texas A & M University System Research and Extension Center, Dallas, Texas; and Johnson: The Noble Foundation, Ardmore, OK
Title:Switchgrass leaf appearance and lamina extension rates in response to fertilizer nitrogen
Source:Journal of Plant Nutrition. Vol. 25, No. 10, October 2002, p. 2115-2127.
# of Pages:13
Publishing Information:New York: Marcel Dekker, Inc.
Keywords:TIC Keywords: Panicum virgatum; Nitrogen fertilizers; Leaves; Visual evaluation; Growing degree days; Fertilization rates; Growth
Cultivar Names:Alamo; Caddo
Abstract/Contents:"Quantification of effects from factors known to modify vegetative development and growth in grasses is important in modeling biomass yield. The objective of this study was to measure the effects of increasing levels of N on leaf appearance (LAR) and lamina extension rates (LER) in switchgrass (Panicum virgatum L.) under field and controlled environmental conditions. Five nitrogen (N) fertilizer rates (0 to 268 kg N ha-1) were applied to a stand of "Alamo" switchgrass at Dallas, TX, and to potted plants (0 to 400 ppm) in a controlled environment. Quadratic regression models best described these responses to increasing rates of fertilizer N in both the field and controlled environment. In the field, LAR-1 decreased to a minimum of 241 growing degree days (GDD) leaf -1 at 163 kg N ha-1 and LER increased to a maximum of 0.188 cm GDD -1 at 164 kg N ha-1. In the controlled environment, LAR-1 decreased to a minimum of 155 GDD-1 at 90 ppm N and LER increased to a maximum of 0.272 cm GDD-1 at 156 ppm N. Results demonstrate that LAR and LER are significantly affected by fertilizer N. Lamina extension rate responded to increasing levels of N in a manner typical of a classic yield response curve and was strongly correlated to plot yields, confirming its value as a potential indicator of yield."
Language:English
References:24
Note:Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Suplick, M. R., J. C. Read, M. A. Matuson, and J. P. Johnson. 2002. Switchgrass leaf appearance and lamina extension rates in response to fertilizer nitrogen. J. Plant Nutr. 25(10):p. 2115-2127.
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Web URL(s):
http://www.tandfonline.com/doi/pdf/10.1081/PLN-120014064
    Last checked: 11/04/2015
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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