Feed intake and performance by yearling Boer goat doelings consuming deep-stacked or ensiled broiler litter
A. L. Goetsch, G. D. Detweiler, B. Bah, T. Sahlu, and J HayesJournal of Animal Science 89(E-Supplement 2):146. 2011
Boer goat doelings (48; 8/treatment), 10.4 ± 0.13 mo of age and 27.1 ± 0.98 kg BW, were used in a 9-wk experiment to compare feeding value of deep-stacked (DS) and ensiled (EN) broiler litter. Broiler litter was processed for 82 d before a 24-d adaptation period. Temperature in the upper area of DS was 55-65°C for 2 wk and that in the lower area was 45-57°C for 10 wk; EN temperature ranged from 0-20°C. Treatments were feeding 1% BW (DM) of a 3:1 corn-soybean meal mixture and moderate to high-quality grass hay free-choice (Cont-Hay), 1% BW hay and concentrate mixture free-choice (Cont-Conc), 1% BW hay, 1.1% BW corn, and DS or EN free-choice (DS-L and EN-L, respectively), and 1% BW hay and DS or EN free-choice (DS-H and EN-H, respectively). Daily samples of DS and EN averaged 70.9 and 73.3% OM (DM basis), 21.8 and 23.2% CP, and 34.0 and 37.2% NDF, respectively. Total DM intake was less for H vs. L treatments, similar between DS-L and EN-L, and greater (P < 0.05) for EN-H than for DS-H (1.13, 1.28, 0.98, 1.13, 0.59, and 0.80 kg/d Cont-Hay, Cont-Conc, DS-L, EN-L, DS-H, and EN-H, respectively; SE = 0.072). There were similar differences in ADG (126, 234, 58, 75, -46, and -8 g; SE = 10.1) and the ratio of ADG:DM intake (118, 188, 60, 66, -84, and -11 g/kg for Cont-Hay, Cont-Conc, DS-L, EN-L, DS-H, and EN-H, respectively; SE = 12.7). There appeared to be more adaptation over time to EN-H than DS-H, with similar DM intake in wk 1-3 (0.48 and 0.64; SE = 0.082) but greater values in wk 4-6 (0.65 and 0.88; SE = 0.076) and 7-9 (0.64 and 0.87 kg/d for DS-H and EN-H, respectively; SE = 0.080). Likewise, ADG was similar between H treatments in periods 1 (-60 and -42 g; SE = 18.5) and 2 (6 and 27 g; SE = 12.5) and greater for EN-H in wk 7-9 (-83 and -9 g for DS-H and EN-H, respectively; SE = 22.2). In conclusion, feeding value of DS and EN for yearling meat goat doelings appears similar with moderate dietary levels, but with limited consumption of other feedstuffs, feeding value of EN may be greater.
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