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Classification of South African Bread Wheat Cultivars According to Hagberg Falling Number Reaction to Fertilizer Treatment

May 2007 Volume 84 Number 3
Pages 214 — 219
M. Craven,1,2 A. Barnard,3 W. Otto,3 and M. T. Labuschagne4
Agricultural Research Council-Small Grain Institute (ARC-SGI), Private Bag X1251, Potchefstroom, 2520, South Africa.Corresponding author. Phone: (018) 299 6100 (Int: +27 18). Fax: (018) 294 7146 (Int: +27 18). E-mail: cravenm@arc.agric.zaAgricultural Research Council-Small Grain Institute, Private Bag X29, Bethlehem, 9700, South Africa.University of the Free State, Department of Plant Sciences. Bloemfontein, 9300, South Africa.


Go to Article:
http://dx.doi.org/10.1094/CCHEM-84-3-0214
Accepted November 6, 2006.
ABSTRACT

The effect of three fertilizer treatments (suboptimal = 0 N, P, K kg/ha; standard = 20 N, 5 P, 5 K kg/ha; and optimal = 60 N, 15 P, and 15 K kg/ha) on the Hagberg Falling Number (HFN) of 15 South African bread wheats were investigated. No statistical significant effect on the HFN of wheat in general could be seen. A split-plot analysis, however, indicated a cultivar effect for HFN response to fertilizer treatment. This allowed for the grouping of cultivars into four response groups: low, low-to-medium, medium, and high, according to HFN sensitivity to fertilizer treatment. A canonical variate analysis (CVA) was performed on the general performance of each cultivar with regard to three characteristics: yield, protein content, and HFN. This allowed for the refinement of risk groups as created by the split-plot analysis for HFN response. However, HFN measured were never below the 220 sec cut-off mark for grade.


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