Table 1 – The effect of RumiStar™ on the starch and fibre digestibility in dairy cows. No RumiStar™
Faeces starch g/kg
Starch digestibility g/kg Faeces pH
Faeces NDF g/kg
50.1 937 6.21 548
typically lower than 3%. However, decreased degradability in the rumen shifts starch digestion towards the intestines. As cows have a limited capacity to digest starch that is entering the duodenum, farmers may see higher amounts of maize grain and starch excreted in the faeces. This not only implies less available digestible starch to the cow but it is also indicates decreased rumen function resulting in reduced fibre digestion. In this case, dairy farmers can take a number of steps to promote better herd efficiency and milk productivity from the maize grain they produce. These include keeping maize silage for longer so as to increase starch digestibility, reducing the amount of maize silage in the ration, using a different grain processing method and / or increasing the amount of rumen fermentable starch. However, these solutions have limitations in application. This is because old maize silage, or crimped maize kept for an extended period of time, will also result in poor cow performance, and farmers may have limited space for prolonged maize storage. For this reason, a new approach involving the addition of RONOZYME®
RumiStar™ the feed enzyme pure
α-amylase that increases the speed of starch degradation in the rumen, has been recently developed to help maximize maize starch utilization and fibre digestion in cows.
Increasing the digestibility of starch using RONOZYME®
RumiStar™
Supplying an enzyme to dairy cow feed will increase the efficiency of maize starch utilization and energy supply to the cow resulting in less starch wasted and less fibre in the faeces. RONOZYME® RumiStar™ proved to do so by catalysing the breakdown of maize starch to oligosaccharides (carbohydrates composed of simple sugars) in the rumen. Oligosaccharides are then used as an energy
RumiStar™ after 14 d 31.9 960 6.49 542
RumiStar™ after 21 d 46,8 942 6.35 538
source by fibre degrading microbes in the rumen and rate of fibre digestion is increased. Improved fibre digestibility delivers more acetate in the rumen which is then absorbed into the blood, enters the udder and is used to help produce milk fat in the cow. Rumen pH remains unchanged with the use of this particular feed additive, resulting in improved digestibility with no reduction in rumen health, more milk, a better energy balance and most significantly, better herd efficiency. A trial with RONOZYME®
RumiStar™ was done to
show the effect on the starch digestibility in mature maize silage. It showed that by adding the alpha amylase, faeces starch reduced by 36% after 14 days and there was less fibre in the faeces proving that NDF and starch digestibility was significantly increased. The pH of cow faeces had also increased demonstrating less fermentation of starch in the large intestine and reduced waste; and less ingested ingredients were excreted in the faeces after 21 days following the addition of amylase enzymes.
Conclusion These results suggest the addition of RONOZYME®
With DSM enzymes.. ...you get more than you e
RumiStar™
releases more of the starch energy in maize-based rations, providing more energy to dairy cows and increasing forage digestion. As a result, cows make better, more efficient use of their total diet, which results in reduced feed costs and boosts milk yield, efficiency and quality as well as fertility and herd profitability.
DSM Nutritional Products Ltd
www.dsm.com/animal-nutrition-health @DSMFeedTweet
Please visit our online magazine –
Dsm-feedback.dk/en/ HEALTH • NUTRITION •MATERIALS
Whether you want to increase digestibility of energy, protein or phosphorus, there is a RONOZYME®
enzyme to give you exceptional
performance, backed by the outstanding technical service and produc quality you can expect from the world leaders in feed enzyme technolo
Table 2 – The percentage of material in the top, middle and bottom sieve following a faeces sieving using a NASCO digestive sieve Top sieve %
Middle Sieve % Bottom sieve %
No RumiStar™ 83.7 3.4
12.9
RumiStar™ after 14 d 71.1 16.3 12.6
RumiStar™ after 21 d 32.4 56.5 11.1
FEED COMPOUNDER MAY/JUNE 2017 PAGE 31
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