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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

From: 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

Items Treatment SEM P - value
Control UN UNCO
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 10.2b 14.7a 10.9b 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
  1. a-bMeans with different superscripts within a row are significantly different (P ≤ 0.05)