Full TGIF Record # 72801
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Web URL(s):http://www.sciencedirect.com/science/article/pii/S0167880900001961
    Last checked: 10/09/2015
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Publication Type:
i
Report
Author(s):Cookson, W. R.; Rowarth, J. S.; Cameron, K. C.
Author Affiliation:Soil, Plant and Ecological Sciences Division, Hilgendorf Building, Lincoln University, Canterbury, New Zealand
Title:The fate of autumn-, late winter- and spring-applied nitrogen fertilizer in a perennial ryegrass (Lolium perenne L.) seed crop on a silt loam soil in Canterbury, New Zealand
Source:Agriculture, Ecosystems, and Environment. Vol. 84, No. 1, March 2001, p. 67-77.
# of Pages:11
Publishing Information:Amsterdam: Elsevier Science Publishers
Keywords:TIC Keywords: Nitrogen fate; Lolium perenne; Seasonal variation; Nitrogen; Fertilization rates; Silty soils; Loam soils; Nitrogen uptake; Application timing; Nitrogen fertilization; Seed yield; Leaching; Denitrification; Risk assessment; Volatility
Abstract/Contents:"The use of fertilizer nitrogen (N) during seasons other than spring to increase seed yield of perennial ryegrass (Lolium perenne L.) has raised concerns about possible environmental contamination from fertilizer N. The fate of 15N-labelled fertilizer applied at several rates during autumn, late winter and/or spring was measured using silt loam (Eutric Cambisol (FAO)) monolith lysimeters (500 mm diameter, 600 mm deep) during two, 1-year lysimeter studies in Canterbury, New Zealand. Total ryegrass uptake of late winter and spring applied 15N-labelled fertilizer at harvest was greater (40 and 43%, respectively) than N fertilizer applied in autumn (18%) in 1996 and 1997, reflecting plant demand and soil immobilization in the differetn seasons. Consequently, in conjuction with spring N fertilizer, late winter N fertilizer application had significantly (P<0.05) greater affects on seed yields than autumn applied N fertilizer. Losses of late winter applied N fertilizer (9%) were significantly lower than from N fertilizer applied during autumn (23%) or spring (19%) because of conditions which encouraged leaching and denitrification during autumn and ammonia volatilzaton during spring. Risk:benefit analysis showed that, under the climatic and soil conditions prevailing during these experiments, autumn N fertilizer application was associated with high risk of losses and small benefits in crop N recovery. Late winter and spring N fertilizer had substantial benefits with much lower risk."
Language:English
References:39
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cookson, W. R., J. S. Rowarth, and K. C. Cameron. 2001. The fate of autumn-, late winter- and spring-applied nitrogen fertilizer in a perennial ryegrass (Lolium perenne L.) seed crop on a silt loam soil in Canterbury, New Zealand. Agric. Ecosyst. Environ. 84(1):p. 67-77.
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Web URL(s):
http://www.sciencedirect.com/science/article/pii/S0167880900001961
    Last checked: 10/09/2015
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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