Table 7.

Effects of Mn and BS on the intestinal structure of breeding geese during laying period.

Group	Mn (mg/Kg)	BS (CFU/Kg)	VH (μm)	CD (μm)	V/C
I	10	5 × 109	601.84a	101.66	5.95
II	20	5 × 109	650.18a	105.11	6.19
III	30	5 × 109	603.28a	87.19	7.52
IV	10	2.5 × 109	577.57c	91.66	6.40
V	20	2.5 × 109	539.31c	104.67	5.15
VI	30	2.5 × 109	548.94c	110.70	5.48
	10		589.71	96.66	6.17
	20		594.75	104.89	5.67
	30		576.10	93.95	6.50
		5 × 109	618.44a	97.99	6.55
		2.5 × 109	555.27c	99.01	5.67
	SEM		55.26	13.03	1.38
	P value	Mn	0.644	0.218	0.450
		BS	<0.01	0.843	0.114
		Mn × BS	0.124	0.197	0.182

In the same column, values with the same small or no letter superscripts mean no significant difference (P > 0.05), while with adjacent small letter superscripts mean significant difference (P < 0.05), and with alternate small letter superscripts mean significant difference (P < 0.01).

Abbreviations: BS, Bacillus subtilis; CD, crypt depth; VH, villus height.