Less expensive feed is usually higher in fiber than the corn-soy diets typically used in U.S. swine production, explained Hans H. Stein, professor of animal sciences at the University of Illinois at Urbana-Champaign.
However, the white breeds that are used in commercial pork production use only about 40 percent of the insoluble fiber. "If you can increase that number to 50 or 60 or 70 percent, then of course, you would get a much better use of the energy in those ingredients," Stein explained.
"The white breeds have been selected for high efficiency and rapid gain for many, many generations," Stein continued. "But that's all based on corn-soy diets. However, there are also indigenous breeds of pigs that have not been selected for commercial production, and these breeds have, therefore, not been fed the corn-soybean meal diets for as many generations as the white breeds."
Among those indigenous breeds are Meishan pigs, which have been raised in China for many centuries. Stein's hypothesis was that these pigs, which have not been selected for efficiency and rapid weight gain, would use fiber more efficiently than the white breeds.
Stein and his team compared the fiber digestion of Meishan pigs with that of two groups of Yorkshire pigs. They tested four diets that used high-fiber ingredients: distillers dried grains with solubles (DDGS), soybean hulls, sugar beet pulp, and pectin. When fed DDGS, the values for apparent total tract energy digestibility were higher for the Meishan pigs (83.5%) than for either weight-matched (77.3%) or age-matched (78.8%) Yorkshire pigs. Researchers observed no significant difference in energy digestibility for the other ingredients.
"What we observed was that, particularly for the DDGS diets, the Meishans were quite a bit more effective at using that fiber," Stein said. "That diet is high in insoluble dietary fiber. When we looked at more soluble fibers, there was no difference."
Although Meishan pigs would never be used for commercial pork production in the United States, the results indicate that differences exist among breeds of pigs. Thus, it is possible that differences also exist among the white breeds and that some may use fibers more efficiently than others.
Stein stressed that this study was preliminary and said that determining if white breeds can be bred to use insoluble fiber more efficiently will be quite costly because it requires selecting pigs for multiple generations. Stein said that he and colleagues at the University of Illinois' Institute for Genomic Biology are pursuing funding for further research.
"I think it is exciting that there are some pigs that can use fiber better than we have thought in the past, and I think this will open up opportunities to think in different ways about how we can feed pigs economically," he said.
The study was published in a recent issue of the Journal of Animal Science and was co-authored with former graduate student Pedro Urriola.News writer: Susan Jongeneel
Susan Jongeneel | EurekAlert!
How much drought can a forest take?
20.01.2017 | University of California - Davis
Plasma-zapping process could yield trans fat-free soybean oil product
02.12.2016 | Purdue University
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
20.01.2017 | Awards Funding
20.01.2017 | Materials Sciences
20.01.2017 | Life Sciences