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A comparison of a dairy cow compound feed with and without cassava manihot esculenta given with grass silage



A comparison of a dairy cow compound feed with and without cassava manihot esculenta given with grass silage



Animal Production 33(1): 19-24



Cassava is increasingly available in the UK for use in compound feeds. A 2 .times. 4 factorial study was used to compare dairy cow compound feeds containing nil or 400 g cassava/kg, and crude protein levels of 100, 120, 140 and 160 g/kg, given in conjunction with grass silage. Friesian cows (48) were used in a change-over design with 4 periods each of 4 wk. The trial compared 6 blocks of 4 cows on each of the non-cassava and cassava treatments, with each cow in a block receiving a different protein level. Compound feeds without cassava had a mean barley content of 600 g/kg; feeds with cassava had a mean barley content of 103 g/kg. There were no significant differences in milk yield (21.14 and 22.27 kg/day) or milk fat level (41.4 and 40.4 g/kg milk) on the non-cassava and cassava treatments, respectively, (P .ltoreq. 0.05). Differences in solids-not-fat concentration were also not significant. Average intakes of silage were similar on each type of diet. Daily intakes of the compound feed per cow varied from 6.95 kg on the non-cassava treatment to 7.08 kg on the cassava treatment. This difference in compound intake was not significant. A compound feed containing 400 g cassava/kg performed as well as cereal-based feeds. Cassava can be considered as a satisfactory replacement for cereals up to a level of 400 g/kg in compound feeds for dairy cows.

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Accession: 004560856

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