Testing of the applicability of rape seed and rape seed meal in fattening broilers
Richter, G.; Lemser, A.; Bargholz, J.; Carlsohn, H.
Wirtschaftseigene Futter 42(1): 52-66
1996
Accession: 009526149
In 2 experiments with 1280 Hybro- and Ross-broilers, respectively, 5, 10 and 15 % rape seed or seed meal were administered in experiment A, 5, 10 and 15% rape seed in experiment B. The used rape seed and rape seed meal content relatively high amounts of glucosinolates, determined to 16, respectively 42 mmol/kg. Feed intake and weight gain were reduced when rape seed and rape seed meal were administered. The feeding diets containing rape seed had negative effects on the amount of feed per kg weight gain. The feed conversion was not influenced by rape seed meal. There was no relation between the mortality and the composition of diets. The content of triiodine thyronine in the blood plasma and the mass of the thyroid gland increased with the rising proportion of rape seed. The pattern of fatty acid in the edible slaughtered body and in the abdominal fat is changed by rape fat, particularly the content of oleic acid increases. The results of the experiments show that both 5% rape seed and rape seed meal cannot be recommended for starter and fattening rations of broilers.