【摘要】 用汉普夏(H)、杜洛克(D)、丹麦长白猪(L)各10头和6头约克夏(Y)生长公猪,在体重20～100kg 期间进行了消化、代谢试验和呼吸试验各180头次.结果表明,H 对能量和蛋白质的消化率较低;L 每 kg 代谢体重产热较多,对消化能和消化氮的利用率较低.对食入能量和蛋白质的利用效率,总的趋势是I>H>Y>L.沉积氮/食入氮,L 显著低于 D(P<0.01).40kg 以下的猪对能量、蛋白质的消化率和代谢能的利用率显著较低。60kg 以下的猪对消化氮的利用率显著较高。代谢能/消化能平均为0.964±0.005,几乎不受品种和体重的影响.体重(LW)、食入代谢能(ME)和消化氮(DN)量是影响沉积能数量和形式的主要因素。更多还原

【Abstract】 10 Hampshire（H）,10 Duroc（D）,10 Danish Landrace（L）and 6 Yarkshire（Y）growingboars,from live weight 20～100kg,were used in 180 digestive,metabolic and respiratory trials.The resultsindicated that,the digestibilities of dietary energy and protein by H were lower than the others and L hadlower availabilities of digestible energy（DE）and nitrogen（DN）but higher heat production per W^0.75kg.The retained protein/protein intake（RN/IN）of L was significantly lower than that of D（P<0.01）.Inrespect tO live weight,the digestibilities of dietary energy and protein as well as retained energy permetabolic energy（RE/ME）were significantly lower in pigs less than 40kg.But the RN/DN wassignificantly higher in pigs less than 60kg.The ME/DE,had an average value 0.964±0.005.Live weight,dietary ME and DN had significant effect on the quantity and distribution of the retained energy.更多还原