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Nitrogen and energy metabolism and serum constituents in lambs given broiler poultry litter processed by three deep-stacking methods

Published online by Cambridge University Press:  02 September 2010

B. J. Rude ,
D. L. Rankins Jr  and
W. A. Dozier III
B. J. Rude
Affiliation:
Auburn University, Auburn AL 36849, USA
D. L. Rankins Jr
Affiliation:
Auburn University, Auburn AL 36849, USA
W. A. Dozier III
Affiliation:
Auburn University, Auburn AL 36849, USA
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Abstract

Poultry litter has been used as an economical nitrogen (N) source in ruminant diets. However, litter must be processed to eliminate pathogens. Broiler poultry litter was processed by three different deep-stack methods: (1) uncovered, (2) covered with 0.1524 mm clear polyethylene, and (3) aerated by placing perforated pipe 1 m apart within the stack. Stack temperature was measured for 28 days. The litter was used to formulate experimental diets (186 g litter per kg), while the control diet contained urea as the N source. All diets contained 100 g/kg cottonseed hulls, 16 to 17 g/kg limestone, varying amounts of cracked maize and added retinol. The control diet contained 131 g/kg crude protein (CP) while the litter diets contained 125 g/kg CP. The diets were offered to 16 crossbred wether lambs (37 (s.e. 6·1) kg) in individual metabolism crates for 16 days. Blood was collected at the initiation and termination of the trial. Covering litter with plastic decreased temperature ivithin the stack (P < 0·05). Maximum temperature for the uncovered, covered and aerated stacks was: 68°C, 57°C and 72°C, respectively. Dry-matter intake and dry matter, energy and neutral-detergent fibre apparent digestibilities were not different (P > 0·05) among the diets. Apparent digestibility for N was less (P < 0·05) in lambs given uncovered and aerated litter than in those given the control diet. However, N apparent digestibility in lambs given covered litter was not different from that of those given the control diet. Gross energy and N retention of the four diets were not different (P > 0·05). Covering deep-stacked broiler poultry litter improved N digestibility by proportionately 0·15 compared with uncovered litter. Serum chloride was decreased while serum urea was increased (P < 0·05) in sheep consuming the litter-containing diets. Deep-stacked broiler litter should be covered in an air-tight manner in order to maximize its nutritive value.

Keywords

digestibilitypoultry manureprocessingsheep
Type
Research Article
Information
Animal Production , Volume 58 , Issue 1 , February 1994 , pp. 95 - 101
Copyright
Copyright © British Society of Animal Science 1994

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