Determination of phosphorus fractions in animal protein ingredients

Hua, Katheline, Liu, Linjuan, and Bureau, Dominique P. (2005) Determination of phosphorus fractions in animal protein ingredients. Journal of Agricultural and Food Chemistry, 53 (5). pp. 1571-1574.

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Phosphorus (P) is present in different chemical compounds in animal feeds, and the solubility and digestibility of these different compounds are known to differ significantly. Animal protein ingredients generally have a high P content and are major contributors to total P of feeds for fish and other domestic animals. Estimation of different P compounds in these ingredients could help to improve the accuracy of estimates of digestible P contents of feeds. Bone P and organic P contents were quantified in 32 animal protein ingredients, including 10 fish meals, 14 meat and bone meals, and 8 poultry byproducts meals, using a fractionation protocol. The total P contents of the ingredients ranged from 2.1 to 8.3% on a dry matter (DM) basis. Organic P contents varied between 0.3 and 1.3% of DM. Highly significant (p < 0.001) linear relationships were observed between total P and ash and between bone P and ash for all ingredients combined: total P (%) = 0.185 x ash (%) (R-2 = 0.88), and bone P (%) = 0.188 x ash (%) - 0.852 (R-2 = 0.94). These results suggest that bone P can be easily and reliably estimated on the basis of ash content in animal protein ingredients.

Item ID: 54020
Item Type: Article (Research - C1)
ISSN: 1520-5118
Keywords: phosphorus, feed, digestibility, composition, diet, animal protein ingredients
Date Deposited: 13 Jun 2018 07:38
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070401 Aquaculture @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830102 Aquaculture Fin Fish (excl. Tuna) @ 100%
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