[Feeding value of wheat]
2002
Paulova, J. (Noack (Czech Republic))
The feeding value of 6 wheat varieties (Sulamit, Nela, Estica, Contra, Sarka, Semper) cultivated in 9 different localities but under the same agrotechnical conditions was evaluated by determining their concentrations of nitrogen compounds (NC), protein dispersibility index (PDI) and viscosity. NC concentrations varied from 92.3 to 172 g/kg of dry matter, the effect of the locality was more pronounced than that of the variety. The PDI was also variable (from 16.4 to 29.3 % of soluble proteins in NC) but the method used was not accurate enough to determine the right sources of variability. The highest viscosity (24.51 cP in average) was found in Sulamit, an elite food variety. This is more than twice higher in comparison with the other 5 varieties, including the quality food variety Nela (9.58 cP in average). The effect of the variety was greater than that of the locality. Big differences were found also between the years. These results confirm that quality food varieties had poor feeding value as the feeding value increases with decreasing viscosity. The effect of wheat hardness on the feeding value is also discussed.
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