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Table 6 Prediction equation of energy values for sows from values obtained for growing pigs

From: Alternative prediction methods of protein and energy evaluation of pig feeds

No.a Equationsb n R 2 Reference
1 DEADULT SOW = 4.37 + 0.742 × DEGROWING PIG 67 0.89 [51]
2 DEADULT SOW = 0.984 × DEGROWING PIG + 0.0045 × NDF 67 0.90 [51]
3 DEADULT SOW = 1.012 × DEGROWING PIG + 0.0060 × ADF 67 0.85 [51]
4 DEADULT SOW = 1.014 × DEGROWING PIG + 0.0066 × CF 67 0.82 [51]
5 DEADULT SOW = 0.991 × DEGROWING PIG + 0.0036 × fiber 67 0.87 [51]
6 DEADULT SOW = 3.01 + 0.85 × DEGROWING PIG 19 0.92 [52]
7 DEGESTATING SOW = 3.237 + 0.810 × DEGROWING PIG 11 0.77 [53]
8 MEGESTATING SOW = 5.080 + 0.672 × MEGROWING PIG 11 0.55 [53]
  1. aEquations: No. 1–5 evaluated for diets differing in chemical composition, but contain no more than 60 g of ether extract per kg of dry matter; wheat products contain 10 samples of wheat distillers grains with solubles and 9 samples of wheat and wheat milling coproducts; No. 6 evaluated for wheat products; No. 7-8 evaluated for three diets based on corn, wheat or sorghum and eight diets based on a combination of corn and high-protein feedstuff (soybean meal, canola meal, conventional distillers’ dried gains with solubles or low-fat distillers’s dried grains with solubles) or high-fiber feedstuff (corn germ meal, corn bran, wheat middlings or soybean hulls)
  2. bDEADULT SOW, DEGESTATING SOW and DEGROWING PIG: Digestible energy for adult sows, gestating sows and growing pigs, respectively, expressed in kcal per kg dry matter; ME GESTATING SOW and MEGROWING PIG: Metabolizable energy for gestating sows and growing pigs, respectively, expressed in kcal per kg dry matter; CF, NDF and ADF: Crude fiber, neutral detergent fiber and acid detergent fiber, respectively, expressed in g per kg of dry matter; fiber = 1 – (ash + crude protein + ether extract + starch + sugars), expressed in g per kg dry matter
  3. R 2 – coefficient of determination