Determination of energy and amino acid requirements of Philippine native pigs: experiment 1. determination of ME requirements
2018
Villanueva, J.J.O.
The objective of the study was to determine the ME requirement of growing Philippine native pigs from 20 to 40 kg. Twenty growing Philippine native pigs were blocked by initial weight and gender and were randomly allotted to 1 of 4 dietary treatments using a randomized complete block design. There were 5 replicate pigs per treatment. Diets were formulated with 3.1, 3.2, 3.3, and 3.4 Mcal ME/kg, respectively, corresponding to standardized ileal digestible (SID) Lys: ME ratio of 2.97 g/Mcal. Overall (d 0 to 35), ADG and final BW was unaffected by ME level; however, there was a tendency (P=0.07) for a linear decrease in ADFI and a linear improvement in F/G with increasing ME. Average backfat thickness and 10th rib fat depth linearly increased (P0.02) with increasing ME of the diet. A linear (P0.02) decrease in SFFL was observed as ME level increased from 3,100 to 3,400 kcal/kg. There is, however, a tendency (P0.05) observed in absolute and relative organ weights as the ME levels increased from 3.1 to 3.4 Mcal/kg. In conclusion, the ME requirements for maximum F/G for growing Philippine native pigs between 20 to 40 kg is 3.4 Mcal ME/kg, when diets are formulated at standardized ileal digestible Lys: ME ratio of 2.97 g/Mcal.
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