Alternative prediction methods of protein and energy evaluation of pig feeds

Table 5 Prediction equations of metabolizable energy for pigs from values determined for cockerels [50]

No.^a	Equation^b	n	R ²
1	ME_PIG = 4.170 + 0.7405 × ME_COCKERELS	84	0.697
2	ME_PIG = 4.826 + 0.7016 × ME_COCKERELS – 0.002464 × CF	84	0.699
3	ME_PIG = 4.966 + 0.6924 × ME_COCKERELS	80	0.775
4	ME_PIG = 9.392 + 0.4292 × ME_COCKERELS – 0.01535 × CF	80	0.858
5	ME_PIG = 3.312 + 0.7924 × ME_COCKERELS	51	0.885
6	ME_PIG = 6.686 + 0.5960 × ME_COCKERELS – 0.01190 × CF	51	0.923
7	ME_PIG = 4.700 + 0.7634 × ME_COCKERELS	29	0.710
8	ME_PIG = 9.891 + 0.4274 × ME_COCEKRELS – 0.01612 × CF	29	0.833

^aEquations: No. 1 and 2 - estimated for 84 samples (70 feedstuffs and 14 mixed diets); No. 3 and 4 - estimated after exclusion four samples of meat and bone meals; No. 5 and 6 - estimated for cereals and their by-products, vegetable proteins and mixed diets; No. 7 and 8 - estimated for animal protein and miscellaneous
^bME_PIG and ME_COCKERELS: Metabolizable energy determined for pigs and cockerels, respectively, expressed in MJ per kg dry matter; CF: Content of crude fiber expressed in g per kg dry matter
R ² – coefficient of determination

ISSN: 2049-1891