Full TGIF Record # 249446
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Web URL(s):http://www.sciencedirect.com/science/article/pii/S016788090600363X
    Last checked: 10/15/2014
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Author(s):Sturite, Ievina; Henriksen, Trond Maukon; Breland, Tor Arvid
Author Affiliation:Sturite and Henriksen: Norwegian Institute for Agricultural and Environmental Research, Arable Crop Division Apelsvoll, Kapp; Breland: Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, Ås, Norway
Title:Winter losses of nitrogen and phosphorus from Italian ryegrass, meadow fescue and white clover in a northern temperate climate
Source:Agriculture, Ecosystems, and Environment. Vol. 120, No. 2-4, May 2007, p. 280-290.
# of Pages:11
Publishing Information:Amsterdam, The Netherlands: Elsevier Science Publishers
Keywords:TIC Keywords: Climatic factors; Festuca pratensis; Lolium multiflorum; Nitrogen losses; Nutrient availability; Nutrient loss; Organic carbon; Phosphorus; Seepage; Temperate climate; Trifolium repens; Uptake; Winter injury
Abstract/Contents:"We have studied to what degree Italian ryegrass (Lolium multiflorum Lam.), white clover (Trifolium repens L.) and meadow fescue (Festuca pratensis L.) are able to preserve nitrogen (N) and phosphorous (P) in shoots and roots from one growing season to the next in a northern temperate climate. Field experiments were performed during four consecutive winters in central southeast Norway (60°42'N, 10°51'E), and N and P in plant biomass were measured in the autumn and in the spring. We also measured the contents of total N, total P and organic carbon (C) in seepage water that percolated through the aboveground plant material. Uptake of N and P in Italian ryegrass and white clover was substantially larger than in meadow fescue. The winter losses varied greatly from year to year, depending on the winter climate. On the average for all three of the plant species, the winter losses of N from aboveground biomass were 6, 35, 68 and 10% in the four experimental years, respectively. The corresponding P losses were 11, 36, 60 and 22%. On the average for all plant species and experimental years, 43 (±12)% (S.E., n = 12) of the N, 34 (±9)% of the P and 4 (±1)% of the C that was lost from the aboveground plant biomass during the winter, was recovered in seepage water, basically as a nutrient pulse in melt water in early spring. The very low C recovery rate in seepage water suggested a considerable microbial growth on lost plant C. Assuming that all un-recovered plant C was consumed by microorganisms not included in measurements of the seepage water, modelling showed that microbial immobilisation theoretically might explain the unexpectedly low recovery rates of N and P. The study was not designed to investigate the possible effects of psychrophilic microbes on N and P cycling. Therefore, it is inconclusive and underlines the need for more knowledge on this matter."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Sturite, I., T. M. Henriksen, and T. A. Breland. 2007. Winter losses of nitrogen and phosphorus from Italian ryegrass, meadow fescue and white clover in a northern temperate climate. Agric. Ecosyst. Environ. 120(2-4):p. 280-290.
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DOI: 10.1016/j.agee.2006.10.001
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    Last checked: 10/15/2014
    Access conditions: Item is within a limited-access website
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