Introduction
Ronozyme® RumiStar contains alpha-amylase. The product is authorised for use in the EU only in dairy cows. Ronozyme® RumiStar is available both as a dry application (CT) (Powder) or as a liquid application (L) (Liquid)
Manufacturer´s main claims
Increased feed efficiency
Increased milk efficiency
Technical specifications of Ronozyme® RumiStar (CT) (Powder) and (L) (Liquid)
EU category
Zootechnical additives
Functional group of additives
Digestibility enhancers
Active substance
alpha-amylase (EC 3.2.1.1)
Enzymatic activity in the product
Amylase activity in the product Solid form: 160 KNU/g
Liquid form: 240 KNU/g
EU approval, minimum content
Dairy cows: 300 KNU/kg complete feed
For use up to the 14th week of lactation
End of period of EU authorisation
End of period of EU authorisation 4 February 2025*
*: Following the provisions of Art. 14 of Reg. (EC) No 1831/2003, an application, in accordance with Article 7, has been submitted
EU code
4a21
Production organism
Bacillus licheniformis (DSM 21564)
Product storage stability
Storage of the product (both dry and liquid) for 12 months at temperatures up to 25°C did not reduce enzymatic activity. When stored at 40°C the residual enzymatic activity was higher than 70%
Storage stability in premix and feed
In premixtures supplemented with the product and stored for 3 or 6 months, the recovered activities were greater than 80% and 74%, respectively.
Heat stability
The enzyme's heat stability was tested at two different temperatures: 75°C and 85°C. At 75°C, 76% of the activity could be recovered; at 85°C, the recovery rate was 90%.
Homogeneity
The distribution of the additive, when added to either a premix or a complete feed, was tested. Six sub-samples from three batches of premixtures and complete feed. The subsequent analyses showed a coefficient of variance in the premixtures of 5.1% and 2.8% in the complete feed. Complete feed supplemented with the liquid product showed a coefficient of variance of 3.4%
Carrier
Powder: sodium sulphate, calcium carbonate or kaolin, dextrin and sucrose, sodium chloride, hydrogenated palm oil, cellulose and sodium thiosulphate
Liquid: sucrose, sodium chloride, methionine, water
Handling
The European Commission states: "https://www.novozymes.com/en/products/animal-health-nutrition/ronozymerumistar"
List of references
EFSA (2012). Scientific opinion on the safety and efficacy of Ronozyme RumiStar (alpha-amylase) as a feed additive for dairy cows. EFSA Journal 2012;10(7):2777
EU (2015) Commission implementing Regulation (EU) No 2015/47 of 14 January 2015 concerning the authorisation of a preparation of alpha-amylase produced by Bacillus licheniformis (DSM 21564) as a feed additive for dairy cows (holder of authorisation DSM Nutritional products Ltd, represented by DSM Nutritional products Sp. Z.o.o). Official Journal of the European Union. L 9/8-10