Table 1 Effects of different doses of MHA-Zn in low-protein diets on growth performance of broilers.

Item	A	B	C	D	SEM	p-value
Body weight gain (g)
Week 1	163.01^a	139.52^b	136.01^b	136.78^b	3.548	< 0.01
Week 2	311.23^a	262.52^b	275.18^b	261.99^b	6.545	< 0.01
Week 3	465.94^a	403.25^b	446.32^a,b	401.62^b	11.550	0.099
Week 4	590.86^a	468.22^c	543.97^a,c	440.74^b	20.827	< 0.01
Week 5	641.20	615.13	667.01	628.28	21.760	0.892
Week 6	690.58	605.85	638.36	629.87	16.771	0.373
Feed intake (g)
Week 1	181.28^a	161.66^b	160.81^b	167.66^b	2.842	< 0.01
Week 2	393.89	363.38	380.51	378.63	8.899	0.748
Week 3	709.15	623.88	651.56	593.87	22.209	0.613
Week 4	845.55	755.47	789.79	700.12	25.139	0.227
Week 5	996.03	1072.66	1098.88	1055.74	34.659	0.809
Week 6	1176.06	1150.40	1083.51	1101.97	25.899	0.625
FCR
Week 1	1.11^b	1.16^a,b	1.18^a,b	1.22^a	0.016	0.059
Week 2	1.27	1.38	1.39	1.45	0.036	0.401
Week 3	1.52	1.53	1.47	1.48	0.047	0.971
Week 4	1.43^b	1.61^a	1.45^b	1.58^a	0.028	0.013
Week 5	1.56^b	1.75^a	1.65^a,b	1.68^a,b	0.031	0.149
Week 6	1.71^b	1.90^a	1.70^b	1.75^a,b	0.032	0.062

^a,bValues in the same row with different superscripts are significantly different (p < 0.05). Group A, normal diet (110 mg/kg MHA-Zn); Group B, low-protein diet (70 mg/kg MHA-Zn); Group C, low-protein diet (90 mg/kg MHA-Zn); Group D, low-protein diet (110 mg/kg MHA-Zn). FCR, feed conversion ratio.

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