Table 2. Effects of Rhodiola on cardiac and lung indices and blood parameters of broiler chickens at high altitude.

	d14			d28			d42
Item1	CTL	Low-R	High-R	CTL	Low-R	High-R	CTL	Low-R	High-R
RV/TV	0.24 ± 0.03	0.22 ± 0.02	0.23 ± 0.02	0.26 ± 0.02	0.25 ± 0.04	0.23 ± 0.03	0.26 ± 0.04	0.27 ± 0.04	0.27 ± 0.05
TV/BW	0.55 ± 0.08	0.48 ± 0.08	0.50 ± 0.08	0.49 ± 0.03ab	0.46 ± 0.04b	0.51 ± 0.04a	0.42 ± 0.05	0.39 ± 0.04	0.41 ± 0.04
THW/BW	0.61 ± 0.02	0.60 ± 0.02	0.61 ± 0.03	0.53 ± 0.04	0.49 ± 0.03	0.56 ± 0.03	0.46 ± 0.04ab	0.41 ± 0.02c	0.50 ± 0.04a
LW/BW	0.73 ± 0.03	0.71 ± 0.11	0.75 ± 0.07	0.69 ± 0.09b	0.78 ± 0.09ab	0.81 ± 0.09a	0.52 ± 0.04b	0.55 ± 0.06ab	0.62 ± 0.05a
RBC(1012/L)	2.40 ± 0.2	2.53 ± 0.13	2.57 ± 0.09	2.65 ± 0.21a	2.71 ± 0.19a	3.12 ± 0.17b	2.853 ± 0.36	3.08 ± 0.37	3.00 ± 0.41
HGB (g/L)	145.3 ± 10.6	152.0 ± 8.1	153.0 ± 8.2	153.5 ± 9.2a	160.0 ± 9.2a	179.5 ± 11.8b	170.5 ± 22.3	182.5 ± 24.8	176.8 ± 29.7
HGT (%)	27.3 ± 2.2a	29.7 ± 1.5b	28.5 ± 1.4ab	29.5 ± 2.4a	32.0 ± 2.1b	34.7 ± 1.4c	33.3 ± 3.9	35.8 ± 4.5	35.3 ± 5.6

CTL: basal diet; Low-R: CTL + 0.5% R.crenulata; High-R: CTL + 1.5% R.crenulata.

^a-c Values with different superscripts within the same row at the same time point are significantly different (P < 0.05).

¹RV, right ventricles weight; TV, total ventricles weight; BW, body weight; LW, lung weight; THW, total heart weight; HGB, hemoglobin; HGT, hematocrit; RBC, red blood cell.