【摘要】 本研究由1980至1982年应用饲养试验、消化代谢试验与比较屠宰试验相结合的方法测得白来航母鸡生长期的代谢能与粗蛋白质日需要量(MER与CPR),从而推算出雏鸡日粮的合适代谢能浓度与粗蛋白质含量(MEC与CPC),并与国外资料比较。更多还原

【Abstract】 Metabolizable energy and crude protein daily requirements ( MER and CPR ) of Leghorn growing pullets were estimated through a series of feeding tests, digestion and metabolic trials as well as comparative slaughter experiments, from 1980 to 1982, on growing pullets from the 1st to 6th, 7th to 14th and 15th to 21st week of age. The MER of the 3 successive periods were fpund to be 67.0, 156.7 and 199.9 kcal respectively and the CPR of the same 3 periods were 5.61, 8.35 and 8.74 grams respectively. The metabolizable energy concentration of 1 kg of ration (MEC) were calculated to be 2850, 2820 and 2810 kcal respectively, with such small differences among them that it is probable to merge the three values into one, 2800 kcal for the three successive growing periods. The crude protein contents ( CPC ) of the 3 periods were computed to be 18.9, 15 and 12% respectively from the basic data. These MEC and CPC values were compared with both national and international nutrition standards of growing pullets and discussions were made thereby.更多还原