INVESTIGATIONS ON EMPTY BODY-WEIGHT GAIN, ON PROTEIN FAT AND ENERGY DEPOSITION AS WELL AS ON UTILIZATION OF METABOLIZABLE ENERGY FOR ENERGYDEPOSITION AT BLACK-AND-WHITE BULLS .1. EMPTY BODY-WEIGHT GAIN

Six series of individual feeding experiments (altogether 544 animals) with different energy supply and connected with steps slaughteries and whole-body analyses, constructed carried out and analysed upon the sa me aspects, were regression analytically interpreted with the aim of q uantify the relation of empty body weight to live weight. The relation of empty body weight to live weight showed a nonlinear dependence on the live weight as well as on the age of animals. The assessment of th e metabolizability of energy of the diet as an additional variable red uced the residual variation considerably. Therefore from the knowledge of live weight or age of the animals, and the metabolizability of ene rgy of the diet the relation of empty body weight to live weight of bl ack and white bulls could be calculated. Moreover the relation of empt y body weight gain to live weight gain in dependence on live weight an d live weight gain was investigated.