Graduate Thesis Or Dissertation
 

Comparison between wood fiber pellets and wood shavings as broiler litter

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/02870z29p

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  • Physical and chemical properties of wood (W) fiber (F) pellets (P) and wood (W) shavings(S) were determined in the laboratory prior to their use. Laboratory results showed that WS were superior to WFP except for moisture holding capacity on volume basis which is one of the most essential properties of a good litter. WFP were also found to contain high levels of aluminum (311X), calcium (160X), iron (90X), arsenic (58X) and sulfur (42X) than these elements found in WS An experiment was conducted in a conventional ventilated house to compare unused WFP and unused WS. No significant differences in mean atmospheric ammonia, respiratory dust particles, moisture levels, litter caking scores, body weights, feed conversion and mortality (49 days) were found between the two litter types. WFP were found to slightly reduce atmospheric ammonia for the first 6 weeks when used for the first time. Litter caking scores were better in pens with WFP than in pens with WS. Higher levels of respiratory dust were found in pens with WFP which did not have any adverse effect on birds' performance and health. Two experiments of 7-week duration each and four treatments each were conducted to evaluate the utility of WFP as built-up broiler litter. Litter treatments were unused (U) WS, WFP built-up (B) top (1) dressed with unused WFP (WFPB + UWFPT), WS as base top dressed with unused WFP (WSB + UWFPT), and wood shaving built-up top dressed with UWS (WSB + UWST), respectively. Results from these experiments showed that WFPB+UWFPT did not result in the decrease of atmospheric ammonia when WFP was recycled. Respiratory dust particles were higher in the WFP treatments (WFPB + UWFPT and WSB + UWFPT) than the wood shavings treatments (UWS and WSB + UWST). Litter caking scores were better in pens with WFP treatments. In Trial 1 no significant differences among the treatments were found in body weights, feed conversion, and mortality. However in Trial 2, WSB + UWFPT and WSB + UWST had significantly heavier body weights than UWS and WFPB + UWFPT.
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