The accuracy of prediction is further supported by the positive


impact on ruminant zootechnical performance, practically measured for milk and meat type ruminants. Taking the example of dairy cows,


in a meta-analysis considering multiple studies with dairy cows placed under conventional management, De Ondarza et al., (2010) concluded that S. cerevisiae CNCM I-1077 supplementation led to a significant average milk yield increase (P<0.001) (Figure 5). In addition, the sub-model indicated improved feed efficiency of the supplemented animals, further illustrating a better utilisation of dietary nutrients.


Figure 5: Example of effect of live S. cerevisiae CNCM I-1077 yeast supplementation on dairy cow feed efficiency: under standard, non-stressful conditions (from de Ondarza meta-analysis); under environmental stress (Marsola et al., 2010).


Conclusion Rumen specific live yeast represents a valuable tool which allows maximisation of the forage portion of the diet with higher levels of fermentable carbohydrates, whilst limiting the risk of acidosis and consequent metabolic disorders. More recent results confirm its beneficial impact on fibre microbial degradation and on promotion of an optimal rumen environment. New opportunities can be considered with documented live


yeasts within dynamic models to maximise milk and meat revenue per kilo of feed, or to optimise feed cost whilst maintaining similar revenue.


Cattle Farmers Advised to Consider Crimp to Reduce Energy Shortfall


Following a challenging grass silage making season, dairy and beef farmers are being urged to consider crimping any cereal crops to help plug the energy gaps. Bryan Buckley, regional business manager for Ireland at


Lallemand Animal Nutrition, explains that because of the late silage season, many farmers have made high bulk but lower quality silage which could be lacking in energy come feed-out. “Trouw Nutrition GB recently published their analysis of first cuts


showing the average ME this year was 11.71 MJ/kgDM, with reports of a significant number of crops with ME levels closer to 10 MJ/kgDM. “Many dairy and beef farmers rely on first cut grass silage to


supply the majority of the energy in their diets and without it this year they will have to turn to purchased feeds. Concentrate prices are still extremely high, meaning it makes sense to use home grown feed wherever possible,” he says. “Crimp is the perfect option to help make up this shortfall,


as it easily reaches 12 MJ/kgDM compared to 11.1 MJ/kgDM in wholecrop,” explains Mr Buckley. However, Lientjie Colahan, technical sales support at Lallemand


Animal Nutrition, adds that to achieve and store this high energy feed, paying attention to detail when ensiling crimp will be paramount. “Crimp is much higher risk when it comes to spoilage in the clamp, being prone to fungal issues and the development of mycotoxins. This


PAGE 34 JULY/AUGUST 2021 FEED COMPOUNDER


is because it can be a challenging crop to compact and it provides a lot of readily available nutrients for the spoilage microbes. “Using a crop specific, bacterial inoculant is really important to


help reduce waste in the clamp and ensure that this valuable feed source stores well until you need to feed it. “Magniva Platinum Crimp is specifically designed for use in the


preservation of moist grains. It’s a biological option that contains antifungal bacteria which produce powerful compounds that inhibit spoilage micro-organisms. This ensures faster preservation, while helping prevent heating and spoilage at feedout,” she says. “It’s a cost-effective and environmentally friendly option, compared


to other treatments, and it’s very rumen safe. When used with the correct storage conditions it can reduce wastage to almost zero.” Further to using an inoculant Mrs Colahan recommends


harvesting the crop at 25% - 40% moisture, which is usually two to three weeks earlier than you would conventionally combine it. “Make sure to sheet up the clamp properly with a ground sheet,


side sheets and top sheet that’s properly weighed down. Also pay attention to vermin control throughout the season as rats are particularly drawn to the feed. “By following all of these steps it’s straight-forward to produce


a high energy feed which will help make up any shortfall and save money on purchased feed costs come winter,” she concludes.


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