Influence of periparturient and postpartum diets on rumen methanogen communities in three breeds of primiparous dairy cows

Table 3 Operational taxonomic unit-based diversity measurements from Holstein, Jersey, Holstein-Jersey crossbreed dairy cows at 3, 93, 183, and 273 days in milk

DIM	3			93			183			273			SE	Significance^a
Breed^b	H	J	X	H	J	X	H	J	X	H	J	X	SE	B	DIM
OTU	23.7	37.7	18.5	34.3	33.5	29.7	28.9	22.2	31.1	20.0	24.4	23.0	1.4	NS	NS
Coverage (%)	99.8	99.7	99.9	99.8	99.8	99.8	99.4	99.6	99.4	99.7	99.5	99.6	<0.1	NS	***
Shannon Diversity	1.5	1.5	1.4	1.4	1.4	1.3	1.4	1.4	1.5	1.3	1.4	1.4	<0.1	NS	*
Inverse Simpson	3.8	3.6	3.4	3.1	3.3	3.0	3.2	3.5	3.7	3.1	3.3	3.2	0.1	NS	**
Chao I estimator	52.0	94.7	32.1	68.4	63.4	59.2	82.0	47.0	61.7	54.1	52.2	54.6	4.2	NS	NS

^a P-value of the effects due to breed (Holstein, Jersey, and Holstein-Jersey crossbreed) and their interaction and comparison to time period (3, 93, 183, and 273 DIM)
^b H = Holstein (n = 7); J = Jersey (n = 8), X = Holstein-Jersey crossbreed (n = 7), Breed (B), Days in milk (DIM), *** P < 0.001; ** P < 0.01;* P < 0.05; no significance (NS) P > 0.10

ISSN: 1471-2180