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Fig. 1 | Journal of Animal Science and Biotechnology

Fig. 1

From: Role of milk carbohydrates in intestinal health of nursery pigs: a review

Fig. 1

Changes in G:F of nursery pigs fed diets by inclusion level of lactose in diets during 5 to 7 kg (A) and 7 to 11 kg (B) BW using a broken-line analysis. The meta-analysis is conducted by Proc NLMIXED in SAS 9.4 to determine break-points on the regression of feed efficiency of nursery pigs calculated based on the data from 10 published studies (Phase 1 for 5 to 7 kg BW: 14 experiments) and 14 published studies (Phase 2 for 7 to 11 kg BW: 23 experiments). The breakpoints (one-slope broken-line model) were inclusion levels of lactose at 20% during 5 to 7 kg BW and 13% during 7 to 11 kg BW when G:F were 0.80 and 0.77, respectively. One-slope broken-line models; The equation for G:F during 5 to 7 kg BW was G:F = 0.80–0.39 × 10− 2 × z1, R2 = 0.90. The equation for G:F during 7 to 11 kg BW was G:F = 0.77–0.24 × 10− 2 × z1, R2 = 0.76 was; if lactose supplementation is ≥ breakpoint, then z1 = 0; if lactose supplementation is < breakpoint, then z1 = lactose supplementation - breakpoint

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