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| Web URL(s): | https://dl.sciencesocieties.org/publications/aj/pdfs/78/4/AJ0780040681
Last checked: 12/09/2016
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| Publication Type:
| Refereed |
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| Author(s): | Power, J. F. |
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| Author Affiliation: | ARS-USDA Univ. of Nebraska-Lincoln, Lincoln NE |
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| Title: | Nitrogen Cycling in Seven Cool-Season Perennial Grass Species |
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| Source: | Agronomy Journal. Vol. 78, No. 4, July/August 1986, p. 681-687. |
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| Publishing Information: | Washington: American Society of Agronomy |
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| Keywords: | TIC Keywords: Nitrogen fertilization; Fertilization; Bromus inermis; Agropyron desertorum; Elymus junceus; Nassella viridula; Elymus smithii; Alopecurus arundinaceus
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| Abstract/Contents: | "Among cool-season grasses few comparisons have been made of the effects of N fertilization over an extended time period. An experiment was established at Mandan, ND, to study the effects of low (45 kg N ha-1) and excessive (225 kg N ha-1) fertilizer N rates for 9 yr on growth, N uptake, and fertilizer N accounted for in forage, roots, and soil inorganic N by seven temperate cool-season grass species: western wheatgrass [Pascopyrum smithii Rybd. (Love)], crested wheatgrass [Agropyron desertorum (Fisch. ex Link) Schult.], intermediate wheatgrass [Elytrigia intermedia(Host) Nevski], smooth bromegrass (Bromus inermis Leyss.), Russian wildrye (Psathyrostackys juncea (Fisch.) Nevski], green needlegrass (stipa viridula Trin.), and Garrison creeping foxtail (Alopecurus arundinaceus Poir). Total N concentrations of forage were increased with 225 kg N ha-1 annually only, and were often lowest for higher-yielding species (B. inermis, A. desertorum, and E. intermedia). Cumulative total N uptake was usually greatest for those species plus P. smithii. Total N concentration and uptake in roots were increased by 225 kg N ha-1 annually, with few differences among species. Total N in roots gradually increased with the season, and by fall was double the spring levels. Minimum root-N concentrations were at the 20-to 50-cm soil dept. Soil inorganic N concentrations for the check and 45 kg N ha-1 rae were < 60 kg N ha-1 compared with 300 to 500 kg N ha-1 for the 225 N rate. For higher-yielding species, 70 to 90% of the fertilizer N was initially accounted for in forage, roots, and inorganic N compared with 40 to 50% by the ninth year after extreme drought. At the higher fertilizer rate, 820 kg ha-1 fertilizer N was found in soil organic N. For all species and fertilizer N rates, 200 to 250 kg fertilizer N was not accounted for. |
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| Language: | English |
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| References: | 13 |
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| Note: | Figures
Tables
Contributed by Agric. Res. Service, USDA. |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Power, J. F. 1986. Nitrogen Cycling in Seven Cool-Season Perennial Grass Species. Agron. J. 78(4):p. 681-687. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/78/4/AJ0780040681
Last checked: 12/09/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: S 22 .A45 |
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