Meeting pigs' phosphorous requirements with fermented soybean meal

October 1, 2012

(Phys.org)—Fermented soybean meal (FSBM), considered a promising substitute for fish meal in weanling pig diets because of its protein content, lower cost, and lack of anti-nutritional factors, may have an additional advantage. University of Illinois researchers recently found that pigs digest the phosphorous in FSBM better than the phosphorus in conventional soybean meal.

"Most of the P in soybean meal is bound to phytate, so it's not available to pigs," explained professor Hans Stein.

Previous research by Stein's group found that digest the phosphorous in fermented corn more easily than that in non-fermented corn. "Fermentation releases from the phytate molecule," Stein said.

In this study, Stein and his team looked at whether FSBM offered the same advantage. They observed that the standardized, total-tract digestibility of phosphorus in FSBM is 65.5 percent, compared with 46.1 percent in conventional soybean meal. When the enzyme phytase was added to the diets, the digestibility of phosphorus in FSBM increased slightly to 71.9 percent, whereas phosphorus digestibility in conventional soybean meal increased to 71.4 percent.

"In conventional soybean meal, the majority of the phosphorus was bound in phytate, but the phytase enzyme released much of the phytate-bound phosphorus," Stein explained. "That is why the digestibility increased so much when we added phytase to conventional soybean meal. In FSBM, fermentation had already released much of the phosphorus from phytate, so adding phytase did not improve digestibility very much."

These results show that is almost as effective as the enzyme phytase at releasing phosphorus. Producers can save money on phosphorus by using fermented soybean meal.

"If swine producers use fermented soybean meal without phytase, they can use a greater digestibility value for phosphorus than if they use conventional soybean meal. Therefore, they need less supplemental phosphorus from other sources in the diets to meet the pig's requirements," Stein said.

The study was published in a recent issue of the Journal of Animal Science and was co-authored with doctoral candidate Oscar Rojas.

Explore further: Helping pigs to digest phosphorus

Related Stories

Helping pigs to digest phosphorus

July 17, 2012

Phosphorus is a vital nutrient for pig growth, but pigs do not always digest it well. Research conducted at the University of Illinois has determined how adding various levels of the enzyme phytase to the diet improves how ...

Breeding soybeans for improved feed

September 16, 2011

Modifying soybean seed to increase phosphorus content can improve animal nutrition and reduce feed costs and nutrient pollution. However, further research is needed to commercialize this valuable technology. Knowledge of ...

Finding ways to feed pigs for less

June 7, 2012

Results of a preliminary experiment conducted at the University of Illinois indicate that it may be possible to select pigs that can make efficient use of energy in less expensive feed ingredients, thus reducing diet costs.

Recommended for you

Mice can smell oxygen

December 2, 2016

The genome of mice harbours more than 1000 odorant receptor genes, which enable them to smell myriad odours in their surroundings. Researchers at the Max Planck Research Unit for Neurogenetics in Frankfurt, the University ...

How single-celled organisms navigate to oxygen

December 2, 2016

A team of researchers has discovered that tiny clusters of single-celled organisms that inhabit the world's oceans and lakes, are capable of navigating their way to oxygen. Writing in e-Life scientists at the University ...

Natural nomads, leatherback turtles opt to stay in place

December 2, 2016

Endangered leatherback sea turtles are known for their open-ocean migratory nature and nomadic foraging habits – traveling thousands of miles. But a Cornell naturalist and his colleagues have discovered an area along the ...

Neural stem cells serve as RNA highways too

December 1, 2016

Duke University scientists have caught the first glimpse of molecules shuttling along a sort of highway running the length of neural stem cells, which are crucial to the development of new neurons.

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.