Some aspects of using rapeseed in concentrates for calves
1997
Kaldmae, H. (Estonian Agricultural Univ., Tartu (Estonia))
At Arkna, the experimental station of Estonian Agricultural University, the use of rapeseed cake of average glucosinolate content in calves' concentrate was studied. No rapeseed cake was added to the concentrate of the control group (C) and 15 per cent of fat-rich rapeseed cake was added to the concentrate of the trial group (RS). The duration of the trial was 78 days. Daily weight-gain of the calves in the RS group was 856 g and that of the C group was 799 g. For 1g weight-gain the calves in RS group used 5.06 feed units, 587g digestible protein and 52.9MJ metabolizable energy; calves in C-group used 4.94 feed units, 567g and 51.6 MJ, respectively. Concentrate containing 15 per cent rapeseed cake with average glucosinolate content increased the weight-gain of the calves but decreased feed conversion. The conclusion to be drawn is that 10 per cent of rapeseed oil meal or -cake with average and high glucosinolate content may be added to the calves' concentrate. In that case feed intake and conversion do not decrease and calves' good development, weight-gain and health are guaranteed
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