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! The premix (Devenish Nutrition, Belfast, N. Ireland) provided vitamins and minerals (per kg diet) as fol- lows; 4.2 mg retinol, 0.07 mg cholecalciferol, 80 mg DL-alpha tocopherol, 120 mg copper as copper sulphate, 100 wg iron and ferrous sulphate, 100 ug zinc as zinc oxide, 0.3 tg selenium and sodium selenite, 25 pg manganese as manganous oxide and 0.2 ug iodine as calcium iodate on a calcium sulphate/calcium carbonate carrier. > Calculated as (K* + Na*- Ctr). 3 Calculated as (organic matter — (crude fibre + crude oil + crude protein + starch + sugar)) (Canh et al., 1998b). Table 1. Diet ingredient inclusion and proximate analysis

Table 1 ! The premix (Devenish Nutrition, Belfast, N. Ireland) provided vitamins and minerals (per kg diet) as fol- lows; 4.2 mg retinol, 0.07 mg cholecalciferol, 80 mg DL-alpha tocopherol, 120 mg copper as copper sulphate, 100 wg iron and ferrous sulphate, 100 ug zinc as zinc oxide, 0.3 tg selenium and sodium selenite, 25 pg manganese as manganous oxide and 0.2 ug iodine as calcium iodate on a calcium sulphate/calcium carbonate carrier. > Calculated as (K* + Na*- Ctr). 3 Calculated as (organic matter — (crude fibre + crude oil + crude protein + starch + sugar)) (Canh et al., 1998b). Table 1. Diet ingredient inclusion and proximate analysis

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Table 2. The effect of balance period on digestibility and nitrogen balance in finishing boars 1C1, C2 and C3 correspond to periods when liveweight was expected to be 70, 80 and 90 kg, respectively. abe Means, within rows, without a common superscript differ significantly (P < 0.05).
Table 2. The effect of balance period on digestibility and nitrogen balance in finishing boars 1C1, C2 and C3 correspond to periods when liveweight was expected to be 70, 80 and 90 kg, respectively. abe Means, within rows, without a common superscript differ significantly (P < 0.05).
Linear effect of crude protein (P < 0.05). >Linear effect of crude protein (P < 0.001). ‘Cubic effect of crude protein (P < 0.05). ‘Cubic effect of crude protein (P < 0.01). °Cubic effect of crude protein (P < 0.001). ‘ Quadratic effect of crude protein (P < 0.05). Table 3. The effect of diet on digestibility and nitrogen balance in finishing boars
Linear effect of crude protein (P < 0.05). >Linear effect of crude protein (P < 0.001). ‘Cubic effect of crude protein (P < 0.05). ‘Cubic effect of crude protein (P < 0.01). °Cubic effect of crude protein (P < 0.001). ‘ Quadratic effect of crude protein (P < 0.05). Table 3. The effect of diet on digestibility and nitrogen balance in finishing boars
Table 4. The effect of diet on faecal volatile fatty acid concentration
Table 4. The effect of diet on faecal volatile fatty acid concentration
Table 5. The effect of collection period on output and composition of manure and on ammonia emission
Table 5. The effect of collection period on output and composition of manure and on ammonia emission
Table 6. The effect of diet on output and composition of manure and on ammonia emission 'See Table 1 for diet definitions. ?Measurements were converted to hydrogen ion concentration before statistical analysis. The s.e. on this scale was 58.03 nmol/l. Linear effect of crude protein (P < 0.001). >Cubic effect of crude protein (P < 0.01). ‘Quadratic effect of crude protein (P < 0.001).
Table 6. The effect of diet on output and composition of manure and on ammonia emission 'See Table 1 for diet definitions. ?Measurements were converted to hydrogen ion concentration before statistical analysis. The s.e. on this scale was 58.03 nmol/l. Linear effect of crude protein (P < 0.001). >Cubic effect of crude protein (P < 0.01). ‘Quadratic effect of crude protein (P < 0.001).
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Net EnergyNitrogen Excretionammonia emission
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