PHOTO: JAN SIBON
FEED ADDITIVES ▶▶▶
Given pigs’ limited ability to digest fiber, high-fibre diets pose significant nutritional and health challenges.
In the search for a reason for inconsistent performance of feed additives, some have suggested that this is due to varia- bility of the pig diet in which they are included. In other words, changing the substrate available to the enzyme or probiotic could affect the additive efficacy.
Enzymes and probiotics combined It has been suggested that combination feed additives, with their greater range of action on complex and variable feed ingredients, could improve efficacy and consistency com- pared to individual additives. The synergistic effect of the combination may be derived from a complementary action of in situ produced enzymes from the probiotic, together with the exogenous protease that degrades the fibre-protein matrix, releasing nutrients that remain unavailable when ei- ther additive is used alone. This mode of action allows Bacil- lus-derived enzymes to bypass the challenge of delivering reliable and stable enzymes to the gastrointestinal tract for nutrient release. After an initial screening of various en- zymes, probiotics, and combinations of the two, the combi- nation of a protease and multi-strain Bacillus showed the greatest improvements in pig growth performance, feed conversion efficiency, and energy and protein digestibility. Recent research showed that the synergistic effect of a pro- tease and an enzyme-producing multi-strain Bacillus probi- otic* on energy and protein digestibility (Figures 1 and 2) de- livered consistent improvements of 8% on average daily gain
30 ▶ ALL ABOUT FEED | Volume 25, No. 10, 2017
(ADG) and gain to feed ratio (G:F). Research also showed that the protease/multi-strain Bacillus probiotic product combi- nation, increased protein absorption in the upper gastroin- testinal tract, reducing protein fermentation in the lower gastrointestinal tract and therefore decreasing ammonia emissions by 14%. The use of the protease/multi-strain Bacil- lus probiotic product combination also showed the potential to positively shift the microbiota. One study demonstrated the ability of the multi-strain Bacillus, alone or in combina- tion with protease, to significantly increase highly beneficial Lactobacillus populations, indicating a beneficial shift in the microbiota.
Sustainable profitability While proteases and probiotics added individually and ap- plied in specific conditions, can offer benefits such as im- provements in ADG, the protease/probiotic product combi- nation showed a synergistic effect, maximising energy and amino acid digestibility for improved ADG and G:F in all growth phases and overall. This increase in protein digesti- bility enables pigs to extract more nutrients from the same volume of feed, allowing sustainable profitability with re- duced feed cost. In addition, it can also reduce ammonia emissions and strengthen the gut barrier, supporting growth and health.
*Syncra® SWI
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