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Responses of lactating cows to energy and protein supplementation while grazing a restricted allowance of grass

  • D.C. Patterson (a1), F.J. Gordon (a1), C.P. Ferris (a1) and C.S. Mayne (a1)

Extract

Earlier work has indicated low responses in milk yield to supplementation with concentrates during grazing (Leaver, 1985). The substitution effect of concentrates on herbage dry matter intake is high at generous allowances of grass, but is much lower when the allocation of grass is low (Meijs and Hoekstra, 1984). It is therefore expected that the responses in milk yield to supplementation with concentrates during grazing would be greater with a restricted allowance of grass. The aim of the experiment was to measure the milk yield responses of high yielding cows to increased energy and protein supplementation, when offered a restricted allowance of grass.

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References

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Meijs, J.A.C. and Hoekstra, J.A. 1984. Concentrate supplementation of grazing dairy cows. 1. Effect of concentrate intake and herbage allowance on herbage intake. Grass and Forage Science, 39, 5966.
Leaver, J.D. 1985. Milk production from grazed temperate grassland. Journal of Dairy Research, 52, 313344.

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