Alternative prediction methods of protein and energy evaluation of pig feeds

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

No.^a	Equations^b	n	R ²	Reference
1	DE_{ADULT SOW} = 4.37 + 0.742 × DE_{GROWING PIG}	67	0.89	[51]
2	DE_{ADULT SOW} = 0.984 × DE_{GROWING PIG} + 0.0045 × NDF	67	0.90	[51]
3	DE_{ADULT SOW} = 1.012 × DE_{GROWING PIG} + 0.0060 × ADF	67	0.85	[51]
4	DE_{ADULT SOW} = 1.014 × DE_{GROWING PIG} + 0.0066 × CF	67	0.82	[51]
5	DE_{ADULT SOW} = 0.991 × DE_{GROWING PIG} + 0.0036 × fiber	67	0.87	[51]
6	DE_{ADULT SOW} = 3.01 + 0.85 × DE_{GROWING PIG}	19	0.92	[52]
7	DE_{GESTATING SOW} = 3.237 + 0.810 × DE_{GROWING PIG}	11	0.77	[53]
8	ME_{GESTATING SOW} = 5.080 + 0.672 × ME_{GROWING PIG}	11	0.55	[53]

^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)
^bDE_{ADULT SOW,} DE_{GESTATING SOW} and DE_{GROWING PIG}: Digestible energy for adult sows, gestating sows and growing pigs, respectively, expressed in kcal per kg dry matter; ME _{GESTATING SOW} and ME_{GROWING 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
R ² – coefficient of determination

ISSN: 2049-1891