Dietary net energy levels for growing barrows from 30 to 70 kg

ABSTRACT: This study evaluated the effect of dietary net energy (NE) levels on growth performance and carcass characteristics barrows from 30 to 70 kg body weight (BW). Sixty with initial (IBW) 31.94 ± 3.54 final (FBW) 71.98 5.99 were allotted one five NE (2.40, 2.45, 2.50, 2.55, 2.60 Mcal kg-1), using a completely randomized block design six replicates two per replicate. The experimental period was divided into phase I: 50 II: kg. variables analyzed average daily feed intake (ADFI), (NEI), digestible lysine (LysI), gain (ADG), conversion (FC), FBW, conversion:gain (LysI:G), Cost:Gain (C:G), loin eye area (LEA), muscle depth (MD), first backfat layer (BF1), second (BF2), total (BFt), lean meat percentage, bonus index (BI). In I, there linear increase (P < 0.05) in ADG, NEI, LysI increasing diet. II, also increased LysI, FC linearly. Overall, other not affected > by levels. There an BF2 levels, but altered 0.05). We recommended kg-1 diet for growing