Table 2. Alpha diversity indices of ileal bacterial communities in Huanjiang mini-pigs at different stages of pregnancy^a.

Items	HN45	HN75	LN45	LN75	SEM	P values
						Diet	Stage	Diet × Stage
OTU	1,107.80	1,247.00	1,223.38	1,208.00	44.84	0.690	0.521	0.424
Chao1	1,073.19	1,232.02	1,198.90	1,159.29	44.22	0.778	0.527	0.297
ACE	1,110.08	1,279.08	1,224.47	1,265.04	42.8	0.578	0.251	0.478
Shannon	4.81	4.94	5.31	5.47	0.01	0.126	0.284	0.802
Simpson	0.85	0.87	0.88	0.91	0.21	0.256	0.739	0.971
Coverage	99.25	99.08	99.19	99.17	0.03	0.716	0.083	0.163

^a Based on 31,460 reads. Here and in the following tables, HN45 and HN75 represent samples obtained from Huanjiang mini-pigs fed a higher-nutrient diet for 45 and 75 days, respectively, and LN45 and LN75 represent samples obtained from those fed a lower-nutrient diet for 45 and 75 days, respectively.