Dr Gerald Shurson, professor, the Department of Animal Science at the University of Minnesota, led the review, the purpose of which was to provide a holistic assessment of the benefits and limitations of existing chemical analysis methods and measures used to evaluate feed ingredients for pigs.
Traditional proximate analysis measures - moisture, crude protein, crude fat, crude fiber, and ash - have little value for estimating the actual nutritional and economic value of feed ingredients fed to swine, yet they continue to be commonly used in research studies, feed label regulations, and commodity-trading contract guarantees, said the team.
Increasing energy and nutritional efficiency while simultaneously reducing negative environmental impacts of pork production requires the adoption of precision nutrition practices in global pork production systems, believe the researchers.
Precision swine nutrition can only be achieved by using more accurate and comprehensive methods and measures to determine the true nutri-physiological value of feed ingredients used in swine diets, they added.
Combining net energy and digestible nutrient prediction equations derived from meta-analyses of large and robust data sets with NIRS determinations of total nutrient content of feed ingredients may be the most practical and accurate approach for dynamic estimation of nutrient loading values for feed formulation, they said.
So while promoting the use of the net energy system, SID AA content, and STTD phosphorus content measures for evaluating feed ingredients and formulating swine diets, they said additional measures should be considered in feed ingredient databases, including: (1) water activity; (2) solubility, fermentability, viscosity, and prebiotic effects of dietary fiber; (3) lipid and protein oxidation measures; and (4) estimates of true bioavailability of amino acids, vitamins, and minerals.
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April 29, 2021 at 10:58PM
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Digestion kinetics, precision nutrition: analyzing pig feed - FeedNavigator.com
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