Effects of different dietary energy and protein levels and sex on growth performance, carcass characteristics and meat quality of F1 Angus × Chinese Xiangxi yellow cattle

Table 11 Effects of dietary treatments and sex onamino acid composition of LM (mg/100 mg DM basis)

Item	HE		LE		SEM	E	P	E × P
	LP	HP	LP	HP
Essential
Lysine	4.61	3.72	4.06	4.25	0.46	ns	ns	ns
Valine	3.53	3.05	2.94	2.94	0.35	ns	ns	ns
Histidine	1.26	0.64	0.74	0.64	0.27	ns	ns	ns
Leucine	4.82	4.65	4.61	4.76	0.19	ns	ns	ns
Isoleucine	3.19	3.37	3.05	3.14	0.18	ns	ns	ns
Methionine	4.28	4.11	3.90	4.03	0.17	ns	ns	ns
Phenylalanine	1.59	1.58	1.61	1.56	0.12	ns	ns	ns
Threonine	4.52	4.09	4.16	4.18	0.27	ns	ns	ns
Total E	27.80	25.21	25.09	25.50	0.97	ns	ns	ns
Non essential
Aspartic acid	13.86	13.76	13.35	12.15	1.44	ns	ns	ns
Glutamic acid	21.93	19.54	18.67	20.41	1.19	ns	ns	*
Cysteine	4.79	4.59	4.50	4.45	0.33	ns	ns	ns
Alanine	5.99	5.53	5.36	5.70	0.32	ns	ns	ns
Glycine	4.92	4.32	4.29	4.38	0.32	ns	ns	ns
Serine	9.21	6.23	5.86	5.76	1.37	ns	ns	ns
Proline	2.14	2.13	2.02	2.08	0.21	ns	ns	ns
Arginine	6.26	5.20	5.23	5.28	0.48	ns	ns	ns
Tyrosine	3.82	2.94	3.41	3.54	0.42	ns	ns	ns
Total NE	72.93	64.25	62.69	63.75	2.76	ns	ns	ns
Total AA	100.73	89.46	87.79	89.25	3.51	ns	ns	ns
E/NE, %	38.12	40.00	40.02	40.58	0.015	ns	ns	ns
E/TAA, %	27.59	28.38	28.57	28.77	0.007	ns	ns	ns

ISSN: 2049-1891