T-Stor
 

T-Stor >
Irish Journal of Agricultural & Food Research >
IJAFR, volume 44, 2005 >

Please use this identifier to cite or link to this item: http://hdl.handle.net/11019/674

Title: The application of low crude protein wheat-soyabean diets to growing and finishing pigs: 2. The effects on nutrient digestibility, nitrogen excretion, faecal volatile fatty acid concentration and ammonia emission from boars
Authors: Leek, A. B. G.
Callan, J.J.
Henry, R. W.
O'Doherty, J.V.
Keywords: Ammonia
Boars
Low crude protein
Pig manure
Volatile fatty acids
Issue Date: 2005
Publisher: Teagasc (Agriculture and Food Development Authority), Ireland
Citation: A.B.G. Leek, J.J. Callan, R.W. Henry and J.V. O’Doherty. The application of low crude protein wheat-soyabean diets to growing and finishing pigs: 2. The effects on nutrient digestibility, nitrogen excretion, faecal volatile fatty acid concentration and ammonia emission from boars. Irish Journal of Agricultural and Food Research 44: 247–260, 2005
Series/Report no.: Irish Journal of Agricultural and Food Research;vol 44
Abstract: Diets containing 132, 152, 183 and 206 g/kg crude protein (CP) were fed to growing and finishing boars to evaluate the effect on nutrient digestibility, N balance, faecal volatile fatty acids (VFA) and ammonia-N (NH3–N) emission. Dietary CP concentration was adjusted by altering the ratio of wheat:soyabean meal. Lysine, threonine, tryptophan and total sulphur-containing amino acids were included in all diets at concentrations equivalent to that in the highest CP diet. All diets were formulated to provide 9.7 MJ/kg of net energy. Urine and faeces were collected from 16 boars (4 boars per treatment) housed in metabolism crates. Collections were performed at 72, 80 and 87 kg live weight. NH3–N emission was measured over 10 days using a laboratory scale procedure. Reducing the concentration of dietary CP decreased N intake (linear, P < 0.01), the excretion of urinary N, ammoniacal N and total N (linear, P < 0.001; cubic, P < 0.001) and the emission of NH3–N (linear, P < 0.001; cubic, P < 0.01). Total N excretion and NH3–N emission decreased 8.7% and 10.1% per 10 g/kg reduction in dietary CP concentration between 205.6 and 131.9 g/kg, respectively. There was no interaction between dietary CP concentration and collection period. N balance differed between the collection periods and less NH3–N was emitted at 87 kg than at 72 kg. Decreasing dietary CP reduced faecal VFA concentration (linear, P < 0.05) and the molar proportions of acetic and butyric acids (quadratic, P < 0.01).
Description: peer-reviewed
This study received financial support from Telltech Ltd. (Wicklow, Ireland) and Enterprise Ireland (Dublin, Ireland).
URI: http://hdl.handle.net/11019/674
ISSN: 0791-6833
Appears in Collections:IJAFR, volume 44, 2005

Files in This Item:

File Description SizeFormat
IJAFR 44p247.pdf79.67 kBAdobe PDFView/Open

This item is protected by original copyright


View Statistics

Items in T-Stor are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! Teagasc - The Agriculture and Food Development Authority  2012  - Feedback