Variation in faecal digestibility values related to feed efficiency traits of grower-finisher pigs

Providing pigs a diet that matches their nutrient requirements involves optimizing the based on digestibility values of considered feed ingredients. Feeding same quantity to with similar BW but different requirements, however, can result in average daily gain (ADG) and backfat thickness (BF) between pigs. Digestibility may contribute this variation efficiency. We investigated efficiency traits grower-finisher associated faecal values, independent intake at time measuring digestibility. Considered were ADG, (ADFI), conversion ratio (FCR), BF residual (RFI). Feed intake, BW, data one hundred sixty three-way crossbreed (eighty female eighty male) collected during two phases, from day 0 experiment (mean 23 kg) till 56 70 slaughter 121 kg). Pigs either fed corn/soybean meal or more fibrous wheat/barley/by-products, titanium dioxide as indigestible marker. Faecal samples five before used determine apparent DM, ash, organic matter (OM), CP, crude fat (CFat), fibre (CF), calculate nonstarch polysaccharides (NSPs) energy (E). The effects diet, sex covariate sampling (FIs) estimated significant for all except CFat. each individual pig determined slaughter, corrected FIs, estimate association ADFI, FCR, BF, RFI. In first phase, percent unit increase OM, E, CFat, CF, NSP, Ash individually was related 0.01–0.03 reduction FCR 6–23 g/day A CP 0.1 mm 10 ADG. second decrease 16–20 conclusion, relationship is across developmental stages pig.