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The effects upon the intake and performance of store lambs of supplementing grass silage with barley fish meal and rapeseed meal



The effects upon the intake and performance of store lambs of supplementing grass silage with barley fish meal and rapeseed meal



Animal Production 40(1): 111-122



Two experiments are described in which individually-penned Suffolk .times. (Blue-faced Leicester .times. Swaledale) lambs were given complete diets based on grass silage, and voluntary intake, live wt gain and N retention were measured. Experiment 1 investigated the effects of supplements of fish meal (0, 60 and 120 g/kg diet dry matter (DM)) and barley (0, 150 and 300 g/kg diet DM) in a 3 x 3 design using 72 lambs. The lambs averaged 35 kg live wt at the start of the 47-day experiment. Fish meal supplements increased daily intakes of diet DM, silage DM and metabolizable energy (ME) and improved daily gains, carcass wt and N retention. Barley supplements increased daily intakes of diet DM and ME, but reduced silage DM intake; live wt gain, carcass wt and N retention were all improved. Experiment 2 investigated the effects of supplements of rapeseed meal (0 and 120 g/kg diet DM) in 2 forms (untreated and formaldehyde-treated) and barley (0 and 150 g/kg diet DM) in a 2 .times. 2 .times. 2 design with 2 missing treatments and using 48 lambs. The lambs averaged 39 kg live wt at the start of the 42-day experiment. Rapeseed meal supplements increased daily intakes of diet DM, silage DM and ME, and improved daily gains, carcass wt and N retention. Form of rapeseed meal had no effect. Barley increased diet DM and ME intakes and improved daily gains and carcass wt.

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Accession: 006669426

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DOI: 10.1017/s0003356100031901


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