Recent trials confirm that the introduction of a versatile NSP (Non-Starch Polysaccharides) enzyme in pig diets, improves performance and homogeneity of animals from weaning to slaughter. This has a positive impact on health management by a reduction of re-allotting and increased clean downtime.
The homogeneity within batches is not always measured and/or reported in trial reports although it is worth looking at. Pig producers know that in respect of a minimal clean downtime between batches and a limited mixing across batches, it is necessary to ensure proper animal health management. Low performance and/or high heterogeneity between animals make it difficult. In practice, it means that more homogeneous animals spend less time in the facilities because the time between the first and the last individual to reach target weight is reduced. More homogeneous animals means also less mixing both after weaning and when animals are brought to fattening rooms, which reduces stress and the spread of pathogens. Enzymes can contribute to increase piglets and pig homogeneity; as proven by recent research achieved in collaboration with Adisseo testing Rovabio® Excel, added on top of the usual formulation.
Besides, the general effect of an efficient NSP enzyme to increase digestibility, a versatile enzyme containing a wide range of enzymatic activities, may have more assets than a mono-activity enzyme to impact each individual metabolism and counteract animal diversity.
From -16 to -26% on piglet final weight variability
In the experimental station of a customer in France, a trial was conducted on piglets fed a barley-based diet from 42 to 70 days of age. Daily weight gain was improved by 3.9%, and feed conversion rate was reduced by 4.3% with Rovabio® Excel (see table 1). Moreover, the coefficient of variation decreased by 16%, proving the effect of the enzyme on homogeneity of the batch. The first wickers graph (Graph 1) clearly shows that final weight of the lightest piglets is significantly increased with Rovabio (27.2kg vs. 23.7kg).
This trial confirms the results observed in two other trials carried out in Germany. The University Of Applied Sciences of Nürtingen, showed that the addition of Rovabio® Excel on a wheat-based diet improved piglet growth performances (see Table 2) with a final weight increase of +1kg (+ 3.4%). The coefficient of variation on final body weight was reduced by 20% and the gap between the lightest and the heaviest piglets was significantly reduced – from 20kg to 13kg with Rovabio (see Graph 2)
At the University of München, the piglets fed a corn-soybean diet showed that Rovabio® Excel significantly improved piglet performances (see Table 3). As a result, piglets receiving Rovabio ® were heavier (+ 3.7 % at 69 days of age). Final weight variability was significantly reduced by 26%.
From the piglet weight distribution at the end of the three experimentations, the number of days needed to reach target weight could be determined. The first indicator to be considered is the number of days needed to bring the last piglet to target weight. However, to be closer to management practice on field, a second indicator was calculated: the number of days needed to bring 75% of the piglet batch to target weight, when usually the batch can leave the weaning facilities.
A positive impact kept until slaughter
A trial was carried out in 2012 from weaning to slaughter and confirmed that the reduction of variability with Rovab Excel is also demonstrated during the fattening period, and that the time needed to reach slaughter weight is more homogeneous with Rovabio across individuals.
This trial conducted on corn-based diets at the Kasetsart University in Thailand, shows that Rovabio® Excel decreases feed conversion ratio by 4.5% and significantly reduces the variability within batch (-72%). The faster growth brings a potential reduction of the fattening period by 3 days, and the reduction of heterogeneity allows reducing the fattening period by 7 extra days for 75% of the batch to reach 100kg bodyweight. Altogether, with the addition of a versatile enzyme from weaning to slaughter, the fattening period can be reduced by 10 days and the number of overweight or downgraded pigs can potentially be reduced.
In these four trials with different diets and metabolic phases, in all cases, growth performances and animal homogeneity were significantly improved with Rovabio® Excel until slaughter. This has been possible thanks to the versatility of Rovabio®. The fact that Rovabio® contains 19 enzymatic activities allows a positive response over animal homogeneity on diverse diet types and unique metabolic specificities.
Caroline Joos, Technical Support, Adisseo
Trial reports are available upon request.