Digestible phosphorus needs of terminal-cross growing-finishing pigs

Journal of Animal Science
P R O'QuinnE J Gregg

Abstract

Growth and digestion experiments were conducted to estimate the digestible P needs of terminal-cross growing-finishing pigs fed sorghum-soybean meal-based diets from 25 to 118 kg. Dietary available P levels approximated the levels recommended by the NRC (1988) or were approximately 25% above or below those levels. Up to 80 kg, dietary treatment did not affect performance; from 80 to 118 kg, the lowest P level (no inorganic P) reduced (P = .03) feed efficiency. Carcass leanness, subjective quality scores for the loin, chemical content of lean, and sensory evaluation of cooked lean were not adversely affected by decreasing P. As dietary P decreased, connective tissue amount in the lean decreased (P = .06). Ash content (P < .01) and peak load (P < .05) of metacarpals and metatarsals decreased as dietary P decreased, but structural soundness scores in the live pig were unaffected by treatment. Apparent digestibility of P decreased (P = .08 to P < .01) as dietary P decreased in the diets. Estimated P excretions per pig decreased with decreasing dietary P up to 80 kg; during the 80-to-118-kg interval, P excretions were similar for pigs fed the two lowest P diets due to reduced feed efficiency of pigs fed the lowest P diet. Dietary di...Continue Reading

Citations

Oct 16, 2004·Journal of Animal Science·C W HastadM E Johnston
Aug 4, 2019·Journal of Animal Science·Carine M VierJason C Woodworth
May 27, 2008·Journal of Animal Science·L S AlexanderC H Stahl
Oct 4, 2012·Animal : an International Journal of Animal Bioscience·M P Létourneau-MontminyA Narcy
Mar 17, 2020·The British Journal of Nutrition·Maciej M MisiuraIlias Kyriazakis

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