inclusion on nutrient requirements. In a series of six broiler trials conducted to determine animal response with high levels of phytase, results showed that the efficiency in utilising Methionine + Cystine, Lysine and Threonine were improved by 15, 13 and 5%, respectively (Table 1). This demonstrates the potential feed savings that can be achieved by using higher phytase doses and helps explain where the animal performance benefits of superdosing are coming from.


Optimising fibre breakdown and fermentability Fibre is a major component of diets, usually comprising 10-15% of normal diets, but it is can prove challenging to measure because common analytical methods employed today provide misleading information. The crude fibre method, which is more than 100 years old, is still widely employed to determine fibre, but at best captures 20-25% of the total dietary fibre. Today there is a lot of debate about functional fibre and its


potential benefit to the digestive physiology of animals. One important thing to remember is that fibre is not directly digested by the animal, but serves as a substrate for the gut microbiota to ferment.


Figure 2: Effect of Econase XT on ileal volatile fatty acid content of broilers


Xylanases are known to increase the solubility of fibre and


make it more easily fermentable, thus having marked benefits on gut physiology and the overall balance of gut microbiota (Figures 2 and 3). Higher fibre degradation can help reduce protein flow to the lower gut, thereby reducing biogenic amines and ammonia production, and potential problems with dysbiosis.


Maximum Matrix Nutrition With better knowledge of the anti-nutritive effects and potential nutritional benefits of phytate and fibre, coupled with a better understanding of enzyme mode of action, AB Vista has developed an enzyme application strategy called Maximum Matrix Nutrition. This strategy capitalises on the properties of Quantum Blue, an enhanced E. coli phytase with a high affinity for phytate, in addition to a thermostable and inhibitor-resistant xylanase, Econase XT. Combining these enzymes enables customers to take higher dietary nutrient contributions whilst maintaining animal performance, enabling considerable cost savings and a reduction in the excretion of nutrients. Extensive validation trials have been conducted globally with


broilers and results show on average, savings of around two US cents per kg of live bird, and feed cost savings in excess of US$15/ tonne. When compared with traditional enzyme application, Maximum Matrix Nutrition delivers equal performance at a considerably lower feed cost. Trials have established that broiler performance can be maintained in diets with reductions of at least 2.5 kg/t monocalcium phosphate, 10 kg/t soybean meal and 10kg/t fat. Birds were able to maintain performance while consuming 7.3% less P and 2.8% less lysine (Figure 4).


Figure 4: Benefits of Maximum Matrix Nutrition (MMN) application on broiler chicken production.


Figure 3: Microbiota profiling (percentage guanine + cytosine) of caecal content of turkeys fed diets with and without Econase XT


It is only in the past few years that an application such as


AB Vista’s Maximum Matrix Nutrition has been available for feed producers. This is due to advances in understanding of enzyme modes of action and feed substrate contents, resulting from improvements in analytical methods. Producers are now able to measure the phytate level in diets using NIR technology, and can determine in-feed enzyme activity routinely, ensuring quality assurance procedures are in place to confidently extract maximum value from advanced enzyme application strategies.


FEED COMPOUNDER NOVEMBER/DECEMBER 2018 PAGE 35


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