Main content area

Crambe meal protein and hulls in beef cattle rations

Lambert, J.L., Clanton, D.C., Wolff, I.A., Mustakas, G.C.
Journal of animal science 1970 v.31 no.3 pp. 601
beef cattle, cattle feeding, crambe meal, oilseed protein, protein sources, hulls, dietary nutrient sources, nutritive value, palatability, digestibility, feed rations
Feeding, palatability and digestion trials were with Hereford bullocks to estimate the feeding value of meal and husks of Crambe abyssinica in growing and finishing diets. When the meal was processed by the moist heat-toasting method of Mustakas et al. (J. Amer. Oil Chem. Soc., 1965, 42, 55A) it was unpalatable and daily intake of feed decreased from 8.7 to 6.3 kg as the proportion of C. abyssinica meal protein increased from none to 100%. The husks, given in the amount which would have occurred in the meal if not removed from the seed, did not affect intake or weight gain. Ammonia-treated meal of C. abyssinica was not palatable enough to be used as the only protein supplement to hay. Weight gain was less as the amount of meal in the diet increased. When 0.45 kg NH3-treated meal was mixed with 1.36 kg maize palatability was improved and gain was not decreased. NH3-treated meal was efficiently utilised as protein supplement to a maize diet when it was 33, 50, 67 or all the protein supplement in diets with maize cobs or C. abyssinica husks as roughage. C. abyssinica husks as source of roughage decreased feed intake and daily gain and were not palatable when they were 20% of the finishing diet. Heat or heat-carbonate treatment greatly improved palatability of C. abyssinica meal but when cattle were given the meal as the only protein supplement gain and efficiency were not as good as in cattle given soya bean meal. This effect was greater if the meal had not been husked. Cattle given diets containing heat-carbonate treated meal as 50% of the protein supplement grew as well and efficiently as cattle given only soya bean meal. The unpalatability of C. abyssinica meal was not noticeable when it was blended with soya bean meal in the manufacturing process. Heat-carbonate treated meal was more palatable than heat-treated meal if large proportions were used in the supplement. S. D.