Full TGIF Record # 92503
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Web URL(s):http://www.informaworld.com/smpp/section?content=a713648079&fulltext=713240928
    Last checked: 05/08/2007
    Access conditions: Item is within a limited-access website
Publication Type:
i
Report
Author(s):Gislum, R.; Wollenweber, B.; Boelt, B.; Jensen, E. S.
Author Affiliation:Gislum, Wollenweber, and Boelt: Department of Plant Biology, The Danish Institute of Agricultural Sciences, Research Centre Flakkebjerg, Slagelse, Denmark; Jensen: Department of Agricultural Sciences, Royal Veterinary and Agricultural University, Organic Farming Unit, Taastrup, Denmark
Title:Uptake and distribution of nitrogen in perennial ryegrass: Effect of additional applications at vegetative growth
Source:Journal of Plant Nutrition. Vol. 26, No. 12, December 2003, p. 2375-2389.
# of Pages:15
Publishing Information:New York: Marcel Dekker, Inc.
Keywords:TIC Keywords: Nitrogen; Nutrient uptake; Lolium perenne; Nitrogen fertilization; Fertilization timing; Nitrogen fertilizers; Forage crops; Seed production; Growth; Nitrogen level; Fertilization rates
Abstract/Contents:"Nitrogen (N) fertilization rate, form, and timing in perennial ryegrass (Lolium perenne L.) vary according to the purpose of the grass. Double or triple spring N applications are required in forage production of perennial ryegrass. Whereas in perennial ryegrass grown for seed production the effect of more than one application has not received much attention. The hypothesis is that in perennial ryegrass grown for seed production the utilization of applied N depends on the current N status. Perennial ryegrass was grown in a hydroponic system with two N rates: low-N (0.2 mM) and high-N (6.0mM). After 47 days of growth, additional N was applied as double-labeled 15NO3- 15NH4+ on four successive occassions in order to distinguish between the recoveries of the initial N applications and the additional N applied. Growth parameters and N content were analyzed on five harvesting occassions. Additional N applications to plants with low N status were primarily used to increase both N content in all organs as well as shoot number. By contrast, in high-N treatments, the additional N supplied was primarily used to increase total-N content in leaves. In all treatments, leaves were the preferable storage organs for N, however, the results from the high-N treatments suggest a shift to pseudo-stems as the preferable storage organ when additional N was supplied. It is suggested that the current N concentration in perennial ryegrass determines the potential of the plants to utilize the addtional applied N."
Language:English
References:27
Note:Graphs
Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Gislum, R., B. Wollenweber, B. Boelt, and E. S. Jensen. 2003. Uptake and distribution of nitrogen in perennial ryegrass: Effect of additional applications at vegetative growth. J. Plant Nutr. 26(12):p. 2375-2389.
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Web URL(s):
http://www.informaworld.com/smpp/section?content=a713648079&fulltext=713240928
    Last checked: 05/08/2007
    Access conditions: Item is within a limited-access website
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