Full TGIF Record # 71896
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Web URL(s):http://onlinelibrary.wiley.com/doi/10.1046/j.1365-2494.2000.00233.x/epdf
    Last checked: 10/02/2015
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Publication Type:
i
Refereed
Author(s):Cookson, W. R.; Rowarth, J. S.; Cameron, K. C.
Author Affiliation:Division of Soil, Plant and Ecological Sciences, Lincoln University, Canterbury, New Zealand
Title:The response of a perennial ryegrass (Lolium perenne L.) seed crop to nitrogen fertilizer application in the absence of moisture stress
Source:Grass and Forage Science. Vol. 55, No. 4, December 2000, p. 314-325.
# of Pages:12
Publishing Information:Oxford, Blackwell Scientific Publications
Keywords:TIC Keywords: Physiological responses; Nitrogen efficiency; Lolium perenne; Seed crops; Nitrogen fertilizers; Fertilization; Water stress; Application rates; Application timing; Seed yield; Irrigation rates; Seed quality; Water use; Water use rate; Fertilization rates; Irrigation
Abstract/Contents:"Responses of perennial ryegrass (Lolium perenne L.) to nitrogen (N) fertilizer application rates and timings vary widely, because water is often limiting. Yield response to N fertilizer application during autumn, late-winter and spring , and the associated efficiency of use of these inputs, was assessed under conditions of non-limiting soil moisture during two, one-year lysimeter studies in Canterbury, New Zealand. These were significant (P<0.05) increases in seed and herbage yields with increasing N fertilizer application. Seed yields differed with year; greatest yields were 300 g m-2 in 1996 and 450 g m-2 in 1997. Seed head numbers (r2 = 0.77) seeds head-1 (r2 = 0.92) and herbage yield (r2 = 0.92) were the major determinants of seed yield in both years. Irrigation required to maintain the soil between 70% and 90% of field capacity was directly related (r2 = 0.94 and 0.99 in 1996 and 1997 respectively) to increases in herbage yield. Seed yield, seed quality (thousand seed weight and percentage of seed > 1.85 mg), efficiency of N fertilizer use and apparent N fertilizer recovery were greatest when N fertilizer was applied at a rate of 50 kg N ha-1, 50 or 100 kg N ha-1 and 150 kg N ha-1 in autumn, late-winter and spring respectively; further increases in spring N fertilizer stimulated vegetative growth, but not seed yield. As a management strategy, applying N fertilizer to match the N requirements of the crop during the reproductive stage of growth will result in high yields of high quality seed while minimizing environmental impact."
Language:English
References:45
Note:Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cookson, W. R., J. S. Rowarth, and K. C. Cameron. 2000. The response of a perennial ryegrass (Lolium perenne L.) seed crop to nitrogen fertilizer application in the absence of moisture stress. Grass Forage Sci. 55(4):p. 314-325.
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Web URL(s):
http://onlinelibrary.wiley.com/doi/10.1046/j.1365-2494.2000.00233.x/epdf
    Last checked: 10/02/2015
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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