Featured Research

from universities, journals, and other organizations

Research sheds light on fat digestibility in pigs

Date:
March 7, 2011
Source:
University of Illinois College of Agricultural, Consumer and Environmental Sciences
Summary:
Producers and feed companies add fat to swine diets to increase energy, but recent research suggests that measurements currently used for fat digestibility need to be updated.

Producers and feed companies add fat to swine diets to increase energy, but recent research from the University of Illinois suggests that measurements currently used for fat digestibility need to be updated.

"It's critical that we gain a better understanding of the energy value of fat," said Hans H. Stein, U of I professor in the Department of Animal Sciences. "If we don't know the true energy value of fat, we can't determine if it's economical to add to the diet."

In a recent experiment, Stein and his team of researchers studied how different types of diets affect endogenous losses of fat (fat excreted from pigs that did not originate from the diet). They measured endogenous losses of fat to determine the true digestibility of both intact and extracted corn oil. The intact corn oil was provided in the form of corn germ, and the extracted fat was provided as liquid corn oil.

Endogenous losses differed depending on the type of fat in the diet, he said. The intact fat was less digestible than extracted fat.

"We believe that the main reason intact fat is less digestible than extracted fat is that it is easy for the enzymes to gain access to the fat in corn oil. In contrast, the corn germ is encased in the feed ingredient among the fiber complexes, which makes it difficult for enzymes to access and digest it," Stein said.

His team also discovered that measuring fat digestibility at the end of the ileum results in a more accurate value than measuring the total tract digestibility of fat.

"The microbes in the hindgut can synthesize fat," Stein explained. "This fat is not absorbed in the hindgut; it's just excreted in the feces. Because of this, it's easy to underestimate the amount of fat that was absorbed in the small intestine by the pig."

Stein said this research has opened new doors for swine nutrition.

"We knew that the concentration of fat in the diet affects the value that is determined for apparent digestibility," Stein said. "However, by correcting these values for the endogenous losses, we can calculate the true digestibility of fat fed to pigs."

Results of the research indicate that more information on fat digestibility is needed to ensure that diets are formulated economically.

"We now know that fat digestibility should be determined as ileal digestibility rather than total tract digestibility to avoid the influence of the microbes in the hindgut of pigs," he said. "We also know that for practical feed formulation, it is more accurate to use values for true ileal digestibility than for apparent ileal digestibility because these values are not influenced by the level of fat in the diet."

However, Stein said we still don't know many of the factors that influence fat digestibility in different feed ingredients and we do not have good data for the true ileal digestibility of fat in most of our feed ingredients. A better understanding of how fat is utilized by the pig after absorption is also needed. Stein believes follow-up research should focus on addressing these questions and determining the energy value of the different sources of fat used in swine diets.


Story Source:

The above story is based on materials provided by University of Illinois College of Agricultural, Consumer and Environmental Sciences. Note: Materials may be edited for content and length.


Journal Reference:

  1. D. Y. Kil, T. E. Sauber, D. B. Jones, H. H. Stein. Effect of the form of dietary fat and the concentration of dietary neutral detergent fiber on ileal and total tract endogenous losses and apparent and true digestibility of fat by growing pigs. Journal of Animal Science, 2010; 88 (9): 2959 DOI: 10.2527/jas.2009-2216

Cite This Page:

University of Illinois College of Agricultural, Consumer and Environmental Sciences. "Research sheds light on fat digestibility in pigs." ScienceDaily. ScienceDaily, 7 March 2011. <www.sciencedaily.com/releases/2011/03/110307124931.htm>.
University of Illinois College of Agricultural, Consumer and Environmental Sciences. (2011, March 7). Research sheds light on fat digestibility in pigs. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2011/03/110307124931.htm
University of Illinois College of Agricultural, Consumer and Environmental Sciences. "Research sheds light on fat digestibility in pigs." ScienceDaily. www.sciencedaily.com/releases/2011/03/110307124931.htm (accessed October 21, 2014).

Share This



More Plants & Animals News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

'Cadaver Dog' Sniffs out Human Remains

'Cadaver Dog' Sniffs out Human Remains

AP (Oct. 21, 2014) Where's a body buried? Buster's nose can often tell you. He's a cadaver dog, specially trained to find human remains and increasingly being used by law enforcement and accepted in courts. These dogs are helping solve even decades-old mysteries. (Oct. 21) Video provided by AP
Powered by NewsLook.com
White Lion Cubs Born in Belgrade Zoo

White Lion Cubs Born in Belgrade Zoo

AFP (Oct. 20, 2014) Two white lion cubs, an extremely rare subspecies of the African lion, were recently born at Belgrade Zoo. They are being bottle fed by zoo keepers after they were rejected by their mother after birth. Duration: 00:42 Video provided by AFP
Powered by NewsLook.com
Traditional Farming Methods Gaining Ground in Mali

Traditional Farming Methods Gaining Ground in Mali

AFP (Oct. 20, 2014) He is leading a one man agricultural revolution in Mali - Oumar Diatabe uses traditional farming methods to get the most out of his land and is teaching others across the country how to do the same. Duration: 01:44 Video provided by AFP
Powered by NewsLook.com
Goliath Spider Will Give You Nightmares

Goliath Spider Will Give You Nightmares

Buzz60 (Oct. 20, 2014) An entomologist stumbled upon a South American Goliath Birdeater. With a name like that, you know it's a terrifying creepy crawler. Sean Dowling (@SeanDowlingTV) has the details. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins