Abstract
Influence of Dietary Phytase, Lysine and Phosphorus on Nutrient Digestibility, Hydrolysis of Phytic Acid and Coenzyme Q10 Synthesis in Laying Hens
Highlights
The capability of phytic acid (Phyt-ac) to impact the availability of nutrients is due to the presence of 12 replaceable protons with the capacity to associate with other molecules [1]
There was an interaction between digestible lysine (dLys) level and phytase dose in digestibility of essential and non-essential amino acids (p
In the 0.77% dLys level, linear positive response was observed for Arg, His, Ile, Lys, and Val, and a quadratic response for Leu and Met, and Ingredient Yellow corn (8%) Soybean meal (48%) Calcium carbonate Salt (NaCl) Cellulose Vitamins and minerals1 DL- methionine 84% Ortophosphate 18:21 Yellow pigment 15 g/Kg (Tagetes erecta) Red pigment 5 g/Kg (Capsicum annuum) Choline chloride 60% BMD-1002 Cyromazine 1% Antioxidant2 L- Lysine 76.4% Escherichia coli phytase Analyzed nutrient content Crude protein (%)† Metabolizable energy (Mcal/kg)† Digestible methionine and cysteine (%)†† Digestible methionine (%)†† Digestible lysine (%)† Digestible threonine (%)†† Total calcium (%)† Total phosphorus (%)† Available phosphorus (%)†
Summary
The capability of phytic acid (Phyt-ac) to impact the availability of nutrients is due to the presence of 12 replaceable protons with the capacity to associate with other molecules [1]. These chelates in the gastro-intestinal lumen can reduce the absorption and utilization of nutrients such as proteins, amino acids and minerals [2]. The anti-nutritive effect of Phyt-ac can be eliminated by hydrolysis of Phyt-ac covalent bonds by phosphatases, including phytases. The extent of phytate hydrolysis in the gut will depend on the dietary phytase level. Walk CL, et al [5] found that using 1500 FTU/
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