Effects of urea plus nitrate pretreated rice straw and corn oil supplementation on fiber digestibility, nitrogen balance, rumen fermentation, microbiota and methane emissions in goats

Table 6 Effect of urea plus nitrate pretreated rice straw (UN) and combination of UN and corn oil supplementation (UNCO) on alpha diversity of bacterial community, and abundance of major phyla (relative abundance > 1%) and select families in the rumen of goats

Items	Treatment			SEM	P - value
Items	Control	UN	UNCO	SEM	P - value
Alpha diversity index
Number of OTU	36,693	33,587	35,882	4527	0.88
Shannon-Weiner index	4.02	4.04	3.59	0.339	0.38
Simpson index	0.07	0.07	0.12	0.018	0.08
Chao	786	716	734	79.2	0.74
Ace	777	703	729	77.4	0.71
Sobs	642	581	567	74.9	0.66
Relative abundances, %
Bacteroidetes	64.8	54.2	61.2	3.52	0.12
Firmicutes	27.5	34.8	27.4	3.65	0.27
Ruminococcaceae	10.2^b	14.7^a	10.9^b	1.28	< 0.001
Spirochaetae	1.25	2.47	1.40	0.357	0.06
Unclassified	2.14	1.72	1.24	0.711	0.69
Others	4.31	6.81	8.76	0.618	0.39

^a-bMeans with different superscripts within a row are significantly different (P ≤ 0.05)

ISSN: 2049-1891