TABLE 5.

Effects of different calcium sources on diet and gastrointestinal pH of weaned piglets.

Items	Groups
	C	L	D	M	P
Diet
2 weeks	5.44	5.71	5.72	5.74	6.01
4 weeks	5.78	5.86	5.87	5.88	6.21
6 weeks	5.66	5.61	5.64	5.65	6.08
Gastrointestinal tract
Stomach	6.48 ± 0.34	6.21 ± 0.41	6.22 ± 0.48	6.04 ± 0.89	5.31 ± 1.31
Duodenum	6.41 ± 0.31	6.38 ± 0.19	6.40 ± 0.35	6.38 ± 0.15	6.88 ± 0.43
Jejunum	6.41 ± 0.21	6.39 ± 0.36	6.59 ± 0.11	6.73 ± 0.39	6.65 ± 0.16
Ileum	6.83 ± 0.36	6.70 ± 0.27	6.75 ± 0.21	6.78 ± 0.19	6.90 ± 0.22
Colon	6.56 ± 0.11	6.67 ± 0.33	6.42 ± 0.33	6.66 ± 0.09	6.34 ± 0.08

In the same row, values with no letter or the same letter superscripts mean no significant difference (p > 0.05), while values with different small letter superscripts mean significant difference (p < 0.05).