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Simplified rotational grazing management of dairy cows: effects of rates of stocking and concentrate

  • A. Hoden (a1), J. L. Peyraud (a1), A. Muller (a2), L. Delaby (a1), P. Faverdin (a1), J. R. Peccatte (a2) and M. Fargetton (a2)...

Summary

An experiment was carried out in Normandy between 1986 and 1988 over c. 6 months in each year, using a simplified rotational grazing technique (two paddocks in spring, four in autumn) with a total of 162 high-yielding cows (mean milk yield of 30·0 kg/day at turn-out). Three stocking rates, designated control (C: 2·3 cows/ha over the total area of the system), moderate (M: 2·6 cows/ha = 115% of C) and high (H: 3·0 cows/ha = 130% of C), were compared at two rates of concentrate supplement, 3·7 kg/cow per day and 0·5 kg/cow per day. Individual milk yield differed by a non-significant 5% between the extreme stocking rates (21·3 v. 20·3 kg fat-corrected milk (FCM) for treatments C and H, respectively). Milk production/ha was 23% greater in the H treatment (9816 v. 7970 kg FCM for H and C, respectively). Concentrate supplementation led, on average, to a 9% milk yield improvement (21·8 v. 20·0 kg FCM for high and low rates, respectively), i.e. a mean efficiency of 0·6 kg FCM/kg supplement. This response tended to be greater in the higher-yielding cows and for the high stocking rate. The sward measurements contributed to a better understanding of herbage utilization by the cows.

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Simplified rotational grazing management of dairy cows: effects of rates of stocking and concentrate

  • A. Hoden (a1), J. L. Peyraud (a1), A. Muller (a2), L. Delaby (a1), P. Faverdin (a1), J. R. Peccatte (a2) and M. Fargetton (a2)...

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