早期断奶和育肥期饲粮NDF水平对湖羊生长性能和消化代谢的影响

黄文琴,吕小康,庄一民,崔凯,王世琴,刁其玉,张乃锋

The Effects of Early Weaning and NDF Levels of Finishing Diets on Growth Performance, Nutrient Digestion and Metabolism of Hu Lambs

HUANG WenQin,LÜ XiaoKang,ZHUANG YiMin,CUI Kai,WANG ShiQing,DIAO QiYu,ZHANG NaiFeng

表5 早期断奶和育肥期饲粮NDF水平对湖羊能量利用和氮代谢的影响

Table 5 Effects of early weaning and dietary NDF levels on energy and nitrogen metabolism of Hu lambs

项目 Items	组别 Groups				SEM	P
项目 Items	EW-LL	EW-LH	EW-HH	ER-HH	SEM	P
50-60日龄 50-60 days of age
代谢能采食量ME intake (MJ·d^-1)	8.71ab	8.13b	9.40a	9.48a	0.19	0.041
总能代谢率Metabolic rate of GE (%)	61.13	62.99	62.49	62.87	1.35	0.968
总能沉积率Retained GE (%)	32.49	30.53	36.45	37.07	1.11	0.139
氮采食量N intake (g·d^-1)	24.54ab	22.89b	27.11a	26.69a	0.58	0.023
氮沉积率Retained N (%)	48.87ab	44.19b	54.79a	53.92a	1.36	0.010
115-125日龄 115-125 days of age
代谢能采食量ME intake (MJ·d^-1)	9.34	7.74	8.15	7.35	0.29	0.059
总能代谢率Metabolic rate of GE (%)	55.71	48.22	47.84	47.86	1.56	0.158
总能沉积率Retained GE (%)	45.57	40.10	35.22	34.92	2.19	0.237
氮采食量N intake (g·d^-1)	25.73	22.45	23.18	21.16	0.87	0.311
氮沉积率Retained N (%)	37.42	43.72	41.19	41.75	1.13	0.266
170-180日龄 170-180 days of age
代谢能采食量ME intake (MJ·d^-1)	9.85	8.78	9.58	9.18	0.27	0.567
总能代谢率Metabolic rate of GE (%)	32.45	38.62	45.25	43.31	1.10	0.230
总能沉积率Retained GE (%)	22.39	31.42	40.05	39.90	2.94	0.066
氮采食量N intake (g·d^-1)	24.35	23.28	25.40	24.33	0.70	0.793
氮沉积率Retained N (%)	35.48	31.53	29.47	33.55	2.00	0.757