Sustainable sugarcane production systems: Reducing plant nitrogen demand

Robinson, N., Fletcher, A., Whan, A., Vinall, K., Brackin, R., Lakshmanan, P. and Schmidt, S. (2008) Sustainable sugarcane production systems: Reducing plant nitrogen demand. Sugar Cane International, 26 5: 9-12.


Author Robinson, N.
Fletcher, A.
Whan, A.
Vinall, K.
Brackin, R.
Lakshmanan, P.
Schmidt, S.
Title Sustainable sugarcane production systems: Reducing plant nitrogen demand
Journal name Sugar Cane International   Check publisher's open access policy
ISSN 1468-6031
Publication date 2008-01-01
Sub-type Article (original research)
Volume 26
Issue 5
Start page 9
End page 12
Total pages 4
Place of publication United Kingdom
Publisher International Media
Language eng
Subject 0703 Crop and Pasture Production
Abstract The large amounts of nitrogen (N) fertiliser applied to most modern cropping systems support high yields but can also cause off-site N pollution. More efficient use of N in cropping systems can be achieved through improved N management practices combined with genetic improvement of the crop. We studied sugarcane genotypes in the field and in controlled glasshouse conditions to identify traits that confer nitrogen use efficiency (NUE) to sugarcane. There was no effect of N application on biomass in the plant crop of the field trial. In the first ratoon biomass production was significantly affected by N supply and genotype but no significant interaction was observed. In controlled glasshouse experiments, genotypes differed in N allocation to stalk and leaves. Storage of N in stalks could be useful if N is remobilised to N-sink tissues later in the growing season. Genotypes differed in leaf turnover and inefficient remobilisation of N from senescent leaves could reduce NUE. Photosynthetic NUE (amount of N in leaf per unit CO2 fixed) was examined as a potential screening tool but was not useful to determine instantaneous genotype performance at low/intermediate N supply. Overall, there are numerous traits which could be exploited for future breeding of NUE sugarcane cultivars. This integrated research on NUE at plant and system levels will enable more targeted N supply with reduced N application rates and associated losses while maintaining yields in Australian sugarcane farming systems.
Keyword Australia
Carbon dioxide
Cultivars
Genotypes
Nitrogen
Nitrogen fertilizers
Photosynthesis
Saccharum
Sugarcane
Sustainability use efficiency
Q-Index Code C1
Q-Index Status Provisional Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Biological Sciences Publications
Ecology Centre Publications
 
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Created: Thu, 18 Feb 2010, 18:09:28 EST by Ms May Balasaize on behalf of Faculty of Science