caa a22 4500 386320063 CHVBK 20180307111622.0 cr unu---uuuuu 161130e198810 xx s 000 0 eng 10.1017/S0003356100003378 doi S0003356100003378 pii (NATIONALLICENCE)cambridge-10.1017/S0003356100003378 Feeding British rapeseed meals to pregnant and lactating ewes [Elektronische Daten] Three types of high glucosinolate British rapeseed meal (RSM) — extracted, expeller and extruded — were incorporated in ewe diets at 200 g/kg; soya-bean meal (SBM) at 165 g/kg replaced RSM in a control diet. Eighty housed Suffolk-Mule ewes were divided into four equal groups and given one of four diets, A (control SBM), B (extracted RSM), C (expeller RSM) or D (extruded RSM) for one reproductive cycle. Diets A and B were compared for a second season. The ewes were given a maximum of 2·5 kg diet per day during lactation. Barley straw was available ad libitum. The ewes were mated in November and December. Lambs were weaned at 42 days of age; they were given creep food similar in composition to their dams' lactation diets. There were no dietary effects on ewes in overall health, live weight, oestrous activity, conception, number of lambs born alive or lamb birth weights. A mean of 1·6 lambs were weaned per ewe mated and 58% of these were twins, in year 1. In year 2, 1·8 lambs were reared and 79% were twins. The mean milk yield over the first 4 weeks of lactation was 3·2 1 and there were no significant dietary effects. Fat concentration in milk was very variable, but in general was slightly depressed by the RSM diets, significantly so at three sampling dates. Protein concentration was consistently lower in milk from RSM than SBM groups, significantly lower at four of the weekly samplings. Thiocyanate levels in plasma and milk were related to glucosinolate intake, but were not associated with any detrimental effects. At all sampling dates, values for RSM groups were significantly greater than for SBM ewes. Plasma thyroxine values were similar regardless of diet Copyright © British Society of Animal Science 1988 Vincent Isobel C. Department of Veterinary Medicine and Animal Husbandry, Royal Veterinary College, Boltons Park, Potters Bar, Hertfordshire EN6 1NB Williams H. Ll Department of Veterinary Medicine and Animal Husbandry, Royal Veterinary College, Boltons Park, Potters Bar, Hertfordshire EN6 1NB Hill R. Department of Veterinary Medicine and Animal Husbandry, Royal Veterinary College, Boltons Park, Potters Bar, Hertfordshire EN6 1NB Animal Production Cambridge University Press 47/2(1988-10), 283-289 0003-3561 47:2<283 1988 47 ASC https://doi.org/10.1017/S0003356100003378 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0003356100003378 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Vincent Isobel C. Department of Veterinary Medicine and Animal Husbandry, Royal Veterinary College, Boltons Park, Potters Bar, Hertfordshire EN6 1NB NATIONALLICENCE 700 1- Williams H. Ll Department of Veterinary Medicine and Animal Husbandry, Royal Veterinary College, Boltons Park, Potters Bar, Hertfordshire EN6 1NB NATIONALLICENCE 700 1- Hill R. Department of Veterinary Medicine and Animal Husbandry, Royal Veterinary College, Boltons Park, Potters Bar, Hertfordshire EN6 1NB NATIONALLICENCE 773 0- Animal Production Cambridge University Press 47/2(1988-10), 283-289 0003-3561 47:2<283 1988 47 ASC CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge