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DOI: | 0.4141/cjps88-082 |
Web URL(s): | http://pubs.aic.ca/doi/pdfplus/10.4141/cjps88-082 Last checked: 09/29/2015 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Refereed |
Author(s): | Ukrainetz, H.;
Campbell, C. A.;
Zentner, R. P.;
Monreal, M. |
Author Affiliation: | Research Station, Research Branch, Agriculture Canada, Saskatchewan, Canada; Research Station, Research Branch, Agriculture Canada, Saskatchewan, Canada |
Title: | Response of Bromesgrass to N, P and S Fertilizer on a Gray Luvicolic Soil in Northwestern Saskatchewan |
Source: | Canadian Journal of Plant Science. Vol. 68, No. 3, July 1988, p. 687-703. |
Publishing Information: | Ottawa: Agricultural Institute of Canada |
# of Pages: | 18 |
Keywords: | TIC Keywords: Nitrogen sources; Nitrogen recovery; Nitrogen application; Nitrogen efficiency; Phosphorus; Sulfur; Bromus; Fertilizers
|
Geographic Terms: | Saskatchewan |
Abstract/Contents: | "A 9-year study was conducted on a Gray Luvisolic loam at Loon Lake, Saskatchewan to determine the effect of ammonium nitrate-N (34-0-0) and urea-N (46-0-0) on bromegrass (Bromus inermis Leyess.) production and nutrient quality, N recovery, and N use efficiency when the N was applied either annually or as a single application at the start of the experiment. The effects of phosphorus (P) and sulphur were also assessed. Each N source was applied at single rates of 0, 50, 100 and 200 kg ha-1 N. The ammonium nitrate was applied as a single dose at rates of 600 and 1000 kg ha-1 N. Phosphorus and S were applied every second year at 224 kg ha-1 P2O5 and 45 kg ha-1S. Forage dry matter yields were positively related to precipitation received in May and July, and April-May, but negatively related to June precipitation. Forage dry matter production was greater over the first 8-year period for annual N applications than for a single application receiving an equivalent amount of N; but fertilizer N recovered in forage over the same period was similar (about 30%) for the two methods of application. Dry matter yields were 19% greater after 4 yr and 26% after 8 yr when ammonium mitrate was used compared to urea. Recovery of fertilizer N in forage also favored the ammonium nitrate source. The application of low to moderate N rates depressed forage N and P concentrations when yield response was high but concentrations were increased by the highest rates of N fertilizer and by repeated annual applications of N. Toxic concentrations of NO3-N occurred in bromegrass in the first year when N was appled at or above 400 kg ha-1 as one application and also in the second year when N was applied at 800 kg ha-1. When N was applied annually at 200 kg ha-1, NO3-toxicity became a potential problem in later years as soil mineral N accumulated. Phosphorus and S fertilizers increased dry matter yields of forage P concentration. Annual N applications resulted in more uniform year-to-year yields and N uptake response compared to single application and provided greater dry matter production without loss of nutritive quality. It was concluded that, in contrast to reports in the literature, the response of forage grasses to N is not site specific." |
Language: | English |
References: | 26 |
Note: | Figures Tables |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Ukrainetz, H., C. A. Campbell, R. P. Zenter, and M. Monreal. 1988. Response of Bromesgrass to N, P and S Fertilizer on a Gray Luvicolic Soil in Northwestern Saskatchewan. Can. J. Plant Sci. 68(3):p. 687-703. |
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| DOI: 0.4141/cjps88-082 |
| Web URL(s): http://pubs.aic.ca/doi/pdfplus/10.4141/cjps88-082 Last checked: 09/29/2015 Requires: PDF Reader Access conditions: Item is within a limited-access website |
| MSU catalog number: SB 1 .C3 |
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