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| Web URL(s): | http://www.jstor.org/stable/2558368
Last checked: 12/18/2015
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| Publication Type:
| Refereed |
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| Author(s): | Thornton, B.;
Millard, P.;
Duff, E. I. |
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| Author Affiliation: | Plants Division, Macaulay Land Use Research Institute, Craigiebuckler, Aberdeen AB9 2QF, Scotland, UK; Environmental Modelling Unit, Scottish Agricultural Statistics Service, Macaulay Land Use Research Institute, C raigiebuckler, Aberdeen AB9 2QJ, Scotland, UK |
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| Title: | Effects of nitrogen supply on the source of nitrogen used for regrowth of laminae after defoliation of four grass species |
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| Source: | New Phytologist. Vol. 128, No. 4, December 1994, p. 615-620. |
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| Publishing Information: | Oxford, England: Cambridge University Press. |
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| # of Pages: | 6 |
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| Keywords: | TIC Keywords: Nitrogen; Regrowth; Defoliation; Agrostis castellana; Festuca rubra; Lolium perenne; Poa trivialis; Sand; Clippings; Mowing height; Nutrient uptake; Nutrient solutions; Nitrogen immobilization; Nutrient availability
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| Abstract/Contents: | "Plants of Agrostis castellana, Festuca rubra, Lolium perenne and Poa trivialis were grown in sand culture and supplies with a complete nutrient solution containing either 0^DCD5 or 1^DCD5 mol m⁻3 NH₄NO₃. Plants were clipped weekly to a height of 4 cm. At the time of the ninth clipping (day 0) the nitrient solution was replaced by one in which all nutrogen (N) was enriched with ¹5N to 5 atom %, but otherwise identical. Weekly destructive harvests were taken from day 0 to day 35, whilst unharvested plants continued to receive the weekly clipping. The ₁5N-labelling allowed discrimination between remobilization within the plant from current root uptake in supplying N for laminae regrowth. For all four species a poor N supply reduced both N uptake by roots and the potential N available for remobilization, as well as allocation of both these sources to laminae regrowth. Overall the N supply derived from root uptake was reduced by a greater extent, and the proportion of N in laminae regrowth derived from remobilization increased with low N supply. The rate of remobilization of the N which was accessible was slower with a reduced supply of N. The species order for increasing proportion of N for laminae regrowth being derived from remobilization was L. perenne < P. trivialis < A. castellana < F. rubra irrspective of N supply." |
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| Language: | English |
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| References: | 22 |
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| Note: | Figures
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Thornton, B., P. Millard, and E. I. Duff. 1994. Effects of nitrogen supply on the source of nitrogen used for regrowth of laminae after defoliation of four grass species. New Phytol. 128(4):p. 615-620. |
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| Web URL(s):
http://www.jstor.org/stable/2558368
Last checked: 12/18/2015
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Access conditions: Item is within a limited-access website |
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MSU catalog number: QK 1 .N38 |
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