Determination of energy and amino acid requirements of Philippine native pigs: experiment 2. determinants of SID amino acid requirements
2018
Villanueva, J.J.O.
Twenty growing Philippine native pigs were randomly allotted to 1 of 4 dietary treatments using a randomized complete block design to determine whether there were differences in SID AA Requirements. There were five replicate pigs per treatment. Diets were formulated within 0.717, 0.865, 1.010, and 1.156% standardized ileal digestible (SID) Lysine (Lys), respectively, which corresponded to SID Lys:ME ratios of 2.11, 2.54, 2.97, and 3.4 g/Mcal. All pigs were offered ad libitum intake from d 0 to 35. Overall (d 0 to 35), Philippine native pigs fed with 1.01 % SID Lys had better performance than pig not fed with 1.0 1% SID Lys. Moreover, pigs fed with increasing % SID Lys had quadratic relationships in ME efficiency at d 0 to 35 (P=0.01). However, no significant differences (P0.05) were observed in carcass and meat quality characteristics. Meanwhile, quadratic relationship (P=0.02) were observed in kidney, whereas a linear response (P=0.004 were noted in liver with increasing graded level of % SID Lys. Additionally, a quadratic response was observed in value of gain/pig (P=0.02), feed cost/kg gain (P=0.02), and MOFC/pig (P=0.01) in live weight basis and there is a linear relationship were revealed in carcass basis (feed cost/pig, P=0.009). From the results of this study, it is concluded that diets containing 1.01% SID Lys and a lysine:ME ratio of 2.97 g/Mcal are recommended for use in the feeding of Philippine native pigs at 20 to 40-kg.
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