Feed preference in pigs: Relationship with feed particle size and texture

Sola-Oriol, D., Roura, E. and Torrallardona, D. (2009) Feed preference in pigs: Relationship with feed particle size and texture. Journal of Animal Science, 87 2: 571-582. doi:10.2527/jas.2008-0951

Author Sola-Oriol, D.
Roura, E.
Torrallardona, D.
Title Feed preference in pigs: Relationship with feed particle size and texture
Journal name Journal of Animal Science   Check publisher's open access policy
ISSN 0021-8812
Publication date 2009-02-01
Year available 2009
Sub-type Article (original research)
DOI 10.2527/jas.2008-0951
Open Access Status Not yet assessed
Volume 87
Issue 2
Start page 571
End page 582
Total pages 12
Place of publication Savoy, IL, United States
Publisher American Society of Animal Science
Language eng
Abstract In previous studies, we observed important differences in the feed preferences of pigs resulting from changes in only 1 dietary ingredient. The present experiment was conducted to study the relationship between the feed preference values of feeds reported previously and their particle size and texture characteristics. The effect of individual feed ingredients was studied when added to a common basal diet. In addition to the basal diet, which included rice, a soybean meal product containing 56% CP, sunflower oil, and wheat bran, a total of 126 diets were studied. Of these, 63 were prepared by replacing the rice in the basal diet with another cereal, 29 by replacing the soybean product with different protein sources, 19 by replacing the sunflower oil with different lipid sources, and 6 by replacing the wheat bran with different fiber sources. Cereals were studied at inclusion rates of 150, 300, and 600 g·kg -1; protein sources were studied at 50, 100, and 200 g·kg -1; lipids were studied at 15, 30, and 100 g·kg-1; and fiber sources were studied at 65 and 130 g·kg-1. The particle size profile of all the diets was determined by using a 9-screen sieve shaker. The geometric mean particle size, particle size uniformity, number of particles per gram, surface area (cm2·g-1), and percentage of fine (passing through a 250-μm sieve) and coarse particles (remaining in a 2,000-|μm sieve) were calculated. The texture properties (hardness, fragility, chewing work, and adhesiveness) of the feeds were also determined by using a texture analyzer. The Pearson correlation coefficients of these variables with feed preference were as follows: geometric mean particle size (r = 0.07; P = 0.45), particle size uniformity (r = 0.16; P = 0.07), number of particles per gram (r = -0.05; P = 0.61), surface area (r = -0.07; P= 0.46), percentage of coarse particles (r = 0.04; P = 0.65), percentage of fine particles (r = -0.12; P = 0.19), hardness (r = -0.21; P = 0.02), fragility (r = -0.20; P = 0.03), chewing work (r = -0.33; P < 0.001), and adhesiveness (r = 0.02; P = 0.78). It was concluded that the texture properties of the feed could explain in part the feed preferences observed in pigs, whereas particle size characteristics had less impact.
Keyword Cereal
Particle Size
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 050369
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Queensland Alliance for Agriculture and Food Innovation
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Citation counts: TR Web of Science Citation Count  Cited 21 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 22 times in Scopus Article | Citations
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Created: Tue, 08 Mar 2011, 02:23:34 EST