Abstract
Effects of feeding double low rapeseed (Tower) meal (RSM-T) and Bronowski rapeseed meal (RSM-B) on performance of broiler chicks were investigated. Each of the meals was included at the level of 10%. Diets were maintained isocaloric and isonitrogenous by altering the levels of soybean meal and yellow grease. Goitrin and isothiocyanates contents of RSM-B were 0.12 and 0.06% and those of RSM-T were 0.14 and 0.05%, respectively. Body weight at 4 and 8 weeks of age and feed conversion in chicks fed rapeseed meal were almost equal to those in the control chicks fed soybean meal.At 8 weeks of age, thyroid weight of chicks fed rapeseed meal was 1.5-1.8 times larger than that of chicks fed the control diet. Weight of liver, heart, kidney, spleen, pancreas and abdominal fat, were not influenced by feeding any of these rapeseed meals.
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