"We wanted to determine the energy concentration and digestibility of phosphorus in whey powder, in conventional whey permeate, and in low-ash whey permeate because these values had not been determined," said Hans H. Stein, a U of I professor of animal sciences.
Skim milk powder has been used to meet the requirement for lactose by weanling pigs, but it is costly and usually uneconomical to use in commercial production. Whey powder, a co-product of the cheese industry, contains lactose and protein and is more economical to use in weanling pig diets, he said.
"Some companies take the protein out of whey powder because they sell it for the human food market," Stein explained. "When they take the protein out, they are left with whey permeate, which contains mainly lactose and ash."
In their study, the scientists used conventional whey powder—66 percent lactose, 13.2 percent crude protein, and 15.8 percent ash—and two permeate products. One of the permeates was a conventional whey permeate that contained approximately 76 percent lactose and 9 percent ash. Most of the ash had been removed from the other permeate product, which was approximately 89 percent lactose and only 1.7 percent ash.
The concentration of metabolizable energy and the standardized total tract digestibility of phosphorus were determined in all three ingredients using weanling pigs. Results indicated that the conventional whey permeate contains less metabolizable energy than whey powder (3,081 vs. 3,462 kcal per kg DM). However, the low-ash whey permeate contained 3,593 kcal metabolizable energy per kg DM.
"Removal of protein from whey powder resulted in a reduced concentration of metabolizable energy in the whey permeate. If ash is also removed, the resulting high-lactose, low-ash whey permeate has a concentration of metabolizable energy that is slightly greater than that in whey powder," Stein said.
The concentration of phosphorus in whey powder, conventional whey permeate, and low-ash whey permeate was 0.63, 0.57, and 0.10 percent, respectively, but the standardized total tract digestibility of phosphorus was not different among the three ingredients (91.2, 93.1, and 91.8 percent, respectively).
"These data clearly indicate that phosphorus from all three ingredients is well digested by weanling pigs," he said.
Stein said that these results make it possible to include whey powder, whey permeate, or low-ash whey permeate in diets for weanling pigs that are formulated on the basis of metabolizable energy and the standardized total tract digestibility of phosphorus.
"These data will provide the feed industry and swine producers with more options for including lactose in the diets," he said.
The study was published in a recent issue of the Journal of Animal Science. Co-authors are Jung Wook Lee of the U of I and Beob Kim of Konkuk University in Seoul, South Korea. Funding was provided by Arla Foods of Viby, Denmark.
Phyllis Picklesimer | EurekAlert!
Plasma-zapping process could yield trans fat-free soybean oil product
02.12.2016 | Purdue University
New findings about the deformed wing virus, a major factor in honey bee colony mortality
11.11.2016 | Veterinärmedizinische Universität Wien
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
02.12.2016 | Medical Engineering
02.12.2016 | Agricultural and Forestry Science
02.12.2016 | Physics and Astronomy