Journal
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
Volume 82, Issue 14, Pages 1606-1613Publisher
JOHN WILEY & SONS LTD
DOI: 10.1002/jsfa.1234
Keywords
fibre; digestibility; feed enzymes; grower pigs
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Am experiment was conducted with 12 grower pigs to determine the effects of (1) manipulating dietary neutral detergent fibre (NDF) level and (2) dietary inclusion of fibre-degrading enzymes on nutrient digestibility and excreta characteristics in pigs. Four diets were formulated to contain three levels of NDF: 1, 66 g kg(-1) NDF (low fibre); 2, 121 g kg(-1) NDF (moderate fibre); 3, 222 g kg(-1) NDF (high fibre); 4, diet 3 plus 2.0 g kg(-1) enzyme. Increasing levels of dietary NDF linearly decreased dry matter and energy digestibilities (r(2)=0.99, P < 0.05). Lowering dietary NDF from 222 to 121 g kg(-1) improved nitrogen digestibility by 13% (P < 0.01). Faecal production was decreased by 9% for each 1% decrease in dietary NDF content (r(2)=0.99, P < 0.05). Inclusion of fibre-degrading enzymes in the high-fibre diet improved dry matter and energy digestibilities by 2 and 3% respectively, and reduced faecal production by 10% (P < 0.01). Faecal and manure (faeces plus urine) pH values from pigs fed the highfibre diet and the high-fibre plus enzyme diet were lower than those from pigs fed the other experimental diets (P < 0.05). In conclusion, lowering the dietary NDF level or inclusion of fibre-degrading enzymes in high-fibre diets may offer relatively practical and easy methods for reducing waste production in pigs. (C) 2002 Society of Chemical Industry.
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