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| Web URL(s): | http://www.nrcresearchpress.com/doi/pdf/10.4141/P98-138
Last checked: 01/27/2017
Requires: PDF Reader
https://www.researchgate.net/publication/284592922
Last checked: 03/09/2016 |
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| Publication Type:
| Refereed |
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| Author(s): | Bittman, S.;
Kowalenko, C. G. |
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| Author Affiliation: | Agriculture and Agri-Food Canada, Pacific Agri-Food Research Centre, Agassiz, British Columbia, Canada |
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| Title: | Within-season grass herbage crude-protein- and nitrate-N concentrations as affected by rates and seasonal distribution of fertilizer nitrogen in a high yearly rainfall climate |
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| Section: | Forage
Other records with the "Forage" Section
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| Source: | Canadian Journal of Plant Science. Vol. 80, No. 2, April 2000, p. 277-285. |
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| Publishing Information: | Ottawa: Agricultural Institute of Canada |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Amino nitrogen; Nitrate nitrogen; Residual effects; Split applications; Fertilization rates; Nitrogen fertilization
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| Abstract/Contents: | "An orchardgrass study in which three rates of N (100, 200 and 400 kg ha-1) each distributed in 1/0/0/0, 0.75/0.25/0/0, 0.50/0.25/0.25/0 and 0.25/0.25/0.25/0.25 proportions prior to four cut intervals examined crude-protein-N and nitrate-N concentrations in grass herbage at each cut in three trials. Crude-protein-N concentration frequently increased to a greater degree in a different pattern (based on cut) than yield as the rate of N application increased. This showed that crude-protein-N by itself cannot be used as a method for determining the N sufficiency status of grass. Both rate and distribution of fertilizer N strongly influenced plant nitrate-N concentration; the degree of change varied considerably among cuts and trials. Plant nitrate-N concentration in the control did not correspond to yield responsiveness to N application, making it a poor indicator of the plant's need for fertilizer applications. Residual effects of N applications on plant nitrate-N were noted into the last cut of the season from a single spring application. The effect of N rate and distribution, then, was a function of immediate and residual effects of the applications. There was some evidence that N present in the soil in nitrate-N form enhanced the potential for high nitrate-N in the plant. Plant nitrate-N concentrations accounted for up to 29% of the total N in the plant with concentrations greater than 4000 mg N kg-1 at the highest N applications rates. Plant nitrate-N did not exceed 1000 mg N kg-1, a concentration considered safe for ruminants, when 75 kg N ha-1 or less ammonium nitrate was applied as a single application prior to a growth interval for all cuts. Since grass protein- and nitrate-N concentrations respond differently than yield to N applications, a specific combination of rate and distribution of fertilizer will not necessarily produce maximum herbage quantity and quality simultaneously." |
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| Language: | English |
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| References: | 34 |
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| Note: | Abstract also appears in French
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bittman, S., and C. G. Kowalenko. 2000. Within-season grass herbage crude-protein- and nitrate-N concentrations as affected by rates and seasonal distribution of fertilizer nitrogen in a high yearly rainfall climate. Can. J. Plant Sci. 80(2):p. 277-285. |
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| Web URL(s):
http://www.nrcresearchpress.com/doi/pdf/10.4141/P98-138
Last checked: 01/27/2017
Requires: PDF Reader
https://www.researchgate.net/publication/284592922
Last checked: 03/09/2016 |
| 
MSU catalog number: SB 1 .C3 |
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