neously, coupled with an increase in energy and nutrients re- lease. In other words, it is the total effect of the multienzyme on both substrate and the animal itself in terms of digestion and gut health, resulting in better performance.
Antinutritional impact of dietary fibre A recent study investigated the specific effect of arabinoxylan content and enzyme addition on feed digestibility in finishing pigs. The experimental diets contained three levels of arabi- noxylans, each with or without a multicarbohydrase complex (Rovabio Advance, Adisseo). Figure 1 shows that increasing levels of arabinoxylan nega- tively impacted gross energy digestibility, while the addition of the multicarbohydrase complex solution improved it by 62, 230 and 355kJ/kg. A significant improvement of 5% was also seen in amino acid digestibility. The data demonstrate that arabinoxylans are an antinutritional factor in pigs and that multienzyme supplementation improves the digestibility of feed. Together these effects allow reformulation of diets to improve the economics of production, saving natural resourc- es and decreasing nitrogen excretion. And the level of this effect is dependent on the composition of the diet.
Carbohydrases plus phytase To demonstrate the synergy of various enzymes simulta- neously, a highly concentrated phytase was added to the multicarbohydrase complex (Rovabio Advance Phy, Adisseo), creating an MCPC. The study, carried out at South Dakota State University, evaluated the effect of this MCPC on the performance of grower-finisher pigs. Five typical American corn-wheat-soybean meal-based diets were formulated as follows: • positive control • negative control 1 (NC1) • NC1 plus MCPC • negative control 2 (NC2) • NC2 plus MCPC. Relative to the positive control diet, both negative control diets were similarly reduced in digestible phosphorus (-0.134%) and calcium (-0.12%). NC1 was reduced in net energy and digesti- ble amino acids by 3%, while NC2 had 5% lower levels of net energy and digestible amino acids than the positive control.
Over the whole growth period (34–120kg body weight), pigs fed either of the unsupplemented negative control diets per- formed worse than the positive control. The addition of the MCPC to both negative control diets resulted in better perfor- mance. Figure 2 shows that gain to feed ratio reached at least the same level as the positive control. Those data demonstrate that the addition of an MCPC was able to recover the performance lost when feeding lower specification diets. Those nutrient reductions saved € 20/MT of feed compared to the positive control. That is a saving of € 4.50 per pig. Improving digestibility, the Feedase effect con- tributed to lowering the use of phosphorus and nitrogen resources, decreasing the waste of nutrients.
Sustainable improvements Using the Feedase effect to optimise feed formulation has been proven to be technically and economically advanta- geous for the pig industry. In addition, this research, in combi- nation with other published studies using this combination, shows that it is possible to get more gain out of diets and also make decisions based on specific literature developed. And on top of the economic benefits, the effect on the sustainability of pig production is notable.
More information can be obtained at
http://feedase.com. The author can be reached at
marcio.ceccantini@adisseo.com. References are available on request.
Figure 2 - The addition of a multi-carbohydrase complex plus phytase* improved overall gain to feed ratio in pigs.
0.34 0.35 0.36 0.37 0.38 0.39
a a ab bc c
Grower-finisher pigs could bene- fit from a mul- tienzyme com- plex as a dietary addition.
PC
NC1
NC1 + additive*
a, b, c - column with different superscripts differ significantly (P<0.05). * Rovabio Advance Phy, Adisseo.
▶ PIG PROGRESS | Volume 37, No. 1, 2021 31
NC2
NC2 + additive*
Gain to Feed ratio
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