The nutritional value of differently prepared barley in growing-finishing pigs
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University of Warmia and Mazury, Institute of Animal Nutrition and Feed Management, Oczapowskiego 5, 10-718 Olsztyn, Poland
University of Warmia and Mazury, Department of Pathophysiology, Oczapowskiego 13, 10-718 Olsztyn, Poland
University of Warmia and Mazury, Institute of Agricultural Machinery and Equipment, Oczapowskiego 11, 10-718 Olsztyn, Poland
Publication date: 2001-01-22
J. Anim. Feed Sci. 2001;10(1):119-131
The nutritional value of diets containing differently prepared barley was determined in two experiments. Barley grain was prepared in the following ways: hammer milled to medium fine (MH, 900 µm) or fine particles (FH, 600 µm), rolled (R), fine milled and expanded (E). Experiment 1 was conducted on 36 barrows, 28-95 kg BW (9 animals per treatment), fed individually using a ration system. Experiment 2 was carried out on 48 pigs (6 barrows and 6 gilts per treatment), 30-100 kg BW, maintained in groups and fed ad libitum. Daily weight gains, feed utilization and stomach lesions were determined in Experiments 1 and 2. In Experiment 1, nutrient and energy digestibilities were also assayed. It was found that the digestibility of protein (by 3.3 units), fat and energy (P<0.05) were better in the FH than in the MH diet and that the FH diet, and contained about 0.5 MJ/kg more metabolizable energy. The digestibility of diet R was also a slightly better (P>0.05) and contained more metabolizable energy than MH. The way of preparing barley had a greater effect on growth rate and feed utilization (P>0.05) in Experiment 2 in the pigs that were maintained in lots, fed ad libitum and gained about 900 g daily than in Experiment 1 in which pigs were fed rations according to standards and gained about 700 g. For the faster growing pigs, rolled and expanded barley had a somewhat greater nutritional value (daily gains 937 and 936 g), medium-fine milled barley had a lower value (865 g).
An investigation into the effect of dietary particle size and pelleting of diets for finishing pigs
M.E.E. Ball, E. Magowan, K.J. McCracken, V.E. Beattie, R. Bradford, A. Thompson, F.J. Gordon
Livestock Science
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