Evidence of differences in nitrogen use efficiency in sugarcane genotypes

Robinson, N., Gamage, H. K., Whan, A., Vinall, K., Fletcher, A., Brackin, R. T., Holst, J., Lakshmanan, P. and Schmidt, Susanne (2009). Evidence of differences in nitrogen use efficiency in sugarcane genotypes. In: P. Tait and B. R. Stanmore, Proceedings of the Australian Society of Sugar Cane Technologists. Australian Society of Sugar Cane Technologists, Ballina, NSW, Australia, (256-264). 6-8 May 2009.

Author Robinson, N.
Gamage, H. K.
Whan, A.
Vinall, K.
Fletcher, A.
Brackin, R. T.
Holst, J.
Lakshmanan, P.
Schmidt, Susanne
Title of paper Evidence of differences in nitrogen use efficiency in sugarcane genotypes
Conference name Australian Society of Sugar Cane Technologists
Conference location Ballina, NSW, Australia
Conference dates 6-8 May 2009
Proceedings title Proceedings of the Australian Society of Sugar Cane Technologists   Check publisher's open access policy
Place of Publication Brisbane, Australia
Publisher Australian Society of Sugar Cane Technologists
Publication Year 2009
Sub-type Fully published paper
Open Access Status Not Open Access
ISSN 0726-0822
Editor P. Tait
B. R. Stanmore
Volume 31
Start page 256
End page 264
Total pages 9
Abstract/Summary More efficient use of N in cropping systems can be achieved through improved N management practices combined with genetic improvement of the crop. In this paper we outline traits that may contribute to nitrogen use efficiency (NUE) in sugarcane. We also provide initial biomass and root trait results from a N x genotype pilot field trial in which five unselected genotypes and Q117 were compared for biomass accumulation at two N supply rates (zero and 100-140 kg urea-N/ha/y). In the second ratoon crop, genotypes differed in biomass accumulation at the two N rates. Q117 and two unselected mapping genotypes (KQ99-1387, KQ99-1484) were responsive to N additions and produced less than 50% of the biomass under zero N addition compared with added N fertiliser. In contrast, KQ99-1355 was less responsive to N supply, and grown without added N fertiliser, produced up to 70% of the biomass at high N supply. Genotypes differed in root morphology and distribution. Compared to the other genotypes, KQ99-1355 had a greater root biomass in proportion to stool size and had a dense surface mat of fine roots at both N supply rates. The results confirm those from glasshouse studies that genotypes differ in NUE.
Subjects E1
070305 Crop and Pasture Improvement (Selection and Breeding)
829802 Management of Greenhouse Gas Emissions from Plant Production
060705 Plant Physiology
820603 Sugar Cane (Cut for Crushing)
Keyword Nitrogen Use Efficiency
Nitrogen Uptake
Nitrogen remobilization
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status Unknown

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Created: Thu, 04 Mar 2010, 21:36:52 EST by Hayley Ware on behalf of School of Biological Sciences