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Effect of Stocking Rate on Growth Rate in Weaned Lambs
Irish Journal of Agricultural Research
Vol. 14, No. 1 (Apr., 1975), pp. 1-6
Published by: TEAGASC-Agriculture and Food Development Authority
Stable URL: http://www.jstor.org/stable/25555747
Page Count: 6
You can always find the topics here!Topics: Stocking rate, Liveweight gain, Pastures, Clover, Lambs, Grasses, Roundworms, Fats, Sward, Rotational grazing
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Galway × Suffolk lambs of approximately 26 kg liveweight were stocked at 29.7 (low stocking rate-LSR), 44.6 (medium stocking rate-MSR) and 59.4 (high stocking rate-HSR) per hectare during the periods July 15 to September 28 in 1970 and July 5 to August 27 in 1971 on a 3- 4-year-old ryegrass/white clover pasture. Total liveweight gains (kg per lamb) for LSR, MSR and HSR lambs were respectively 9.46, 6.36 and 2.36 in 1970 and 5.83, 4.43 and 2.69 in 1971. In 1970 the LSR (p < 0.01) and MSR (p < 0.05) lambs had significantly greater liveweight gains than HSR lambs and in 1971 the LSR lambs had greater (p < 0.05) liveweight gains compared with those on HSR. Liveweight gains (kg) of lambs on LSR, MSR and HSR for the periods up to August 31, 1970 and August 25, 1971 were 8.85, 7.64 and 4.78, and 5.96, 4.54 and 2.94 respectively. After August 31, 1970 and August 18, 1971, only small liveweight gains or actual losses were recorded. In September 1970 a severe infestation of gastro-intestinal roundworms resulted in relatively large liveweight losses.
Irish Journal of Agricultural Research © 1975 TEAGASC-Agriculture and Food Development Authority