Feed intake and feed utilization of red pied red holstein x red pied and black pied under loose housing conditions

Hafez, S.; Junge, W.; Hagemeister, H.; Kalm, E.

Zuechtungskunde 61(1): 41-54

1989


Accession: 007346359

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Abstract
In the period from December 1985 to January 1987 the Institute of Animal Breeding and Husbandry investigated the daily feed intake of 35 cows by means of an automatic roughage apparatus under loose-housing conditions. In the herd there were 12 Red Pied (Rbt), 9 crossbreds Red Holstein .times. Red Pied (RH .times. Rbt) and 15 Black Pied (Sbt), which were in the 3, and 4, lactation. The cows were fed twice a day with roughage ad libitum. The concentrate was fed according to milk yield. The average milk yield of Sbt and RH .times. Rbt was at the same amount. The Rbt showed 6 kg/day less yield than the two other genetic groups. The milk yield of all breeds reached maximum in the 5.-6. week of lactation. Then it decreased slowly. The Sbt consumed on average more concentrate, roughage and total feed than the Rbt. The crossbreds consumed to average 1,6 kg DM total feed per day more than the Rbt, but 0,5 kg DM per day less roughage. The concentrate feed intake of Sbt and RH .times. Rbt was at the same amount, but the Sbt consumed 1,5 kg DM per day more roughage than the RH .times. Rbt. The total intake of all genetic groups had its maximum in the 7.-8. week of lactation (2 weeks after the peak yield) afterwards it decreased slowly. An increase of roughage intake could be seen during the lactation. At the beginning of lactation there was a substantial undersupply of energy. The crossbreds had the longest period of undersupply and highest decrease of liveweight, the Rbt had the shortest and lowest one. In the middle and at the end of lactation all genetic groups showed a positive energy balance. The crossbreds showed a stronger oversupply and highest gain of liveweight. The feed conversion was best at beginning of lactation. In the middle and at the end of lactation the milk yield decreased, that means, the cows had worse feed conversion, efficiency decreased. On average all genetic groups converted the feed on the same level.