"Previous research shows that while the amount of energy in DDGS is greater than that of corn, pigs have lower digestibility of energy in DDGS than in corn," said Hans H. Stein, U of I associate professor in the Department of Animal Sciences. "Our goal was to find out why."
Stein's team wanted to develop a greater understanding of the digestibility differences between DDGS and corn. He said the biggest difference between corn and DDGS is fiber content. Fiber contributes to the total energy in DDGS, but not much is known about how pigs utilize the fiber in DDGS.
"We want to find ways to improve the utilization of this energy source in a swine diet," he said. "But first we need to understand the role of fiber in DDGS."
Our research demonstrated that overall, the utilization of fiber in DDGS is low – less than 50 percent. Fiber is characterized as soluble or insoluble fiber. The soluble fiber consists of pectins, some hemicelluloses and some oligosaccharides, Stein said.
"Soluble fiber will change the viscosity of the digesta in the intestinal tract while absorbing water and becoming easily fermentable in the intestinal tract," he added.
On the other hand, insoluble fiber will not dissolve in solution and is made up of the hardest part of the plant such as cellulose and lignin. These fibers do not change viscosity in the intestinal tract and they are the most difficult to ferment.
"Pigs utilize soluble fiber very well, almost 90 percent," Stein said. "Unfortunately, most of the fiber in DDGS is insoluble and has a much lower digestibility. This is the reason for the low digestibility of the combined fiber fraction in DDGS. However, if we can do anything to change the solubility of fiber and make it more soluble, we know we can increase the utilization of it."
From a practical standpoint, DDGS's higher insoluble fiber content means more undigested material goes straight into the manure, which in turn creates more manure management issues for producers.
"If there is a higher fiber content in the manure, it creates a thicker slurry which could lead to more solids in the pit," said Matthew Robert, U of I visiting research engineer in the Department of Agricultural and Biological Engineering. "This requires the pit to agitate the slurry for a longer period of time to get the solids moving so it can be pumped out. If more solids are left in the pit after it's pumped, it results in less storage for the future."
In addition, Stein's study also opened doors to new research methods.
"We know that fiber could be measured in many ways," Stein said. "One of the standard methods of measurement, Total Dietary Fiber (TDF), is very expensive. We found a less expensive procedure, Neutral Detergent Fiber (NDF), to be quite effective and very closely correlated to TDF."
In future research projects, this finding can help save money and make research dollars stretch further to help swine producers.
Stein's team is continuing to look for ways to increase the solubility of fiber and in turn, find new ways to require less feed to produce one pound of gain.
This research titled, "Digestibility of dietary fiber in distillers coproducts fed to growing pigs," was published in the Journal of Animal Science by Pedro E. Urriola and Hans H. Stein of the U of I, and Jerry C. Shurson of the University of Minnesota. Funding was provided by the National Pork Board and the Minnesota Pork Producers Association.
Jennifer Shike | EurekAlert!
Forest Management Yields Higher Productivity through Biodiversity
14.10.2016 | Technische Universität München
Farming with forests
23.09.2016 | University of Illinois College of Agricultural, Consumer and Environmental Sciences (ACES)
Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.
This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...
Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion
Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
27.10.2016 | Materials Sciences
27.10.2016 | Physics and Astronomy
27.10.2016 | Life Sciences