Comparison of Rumen Fluid pH by Continuous Telemetry System and Bench pH Meter in Sheep with Different Ranges of Ruminal pH

Table 1

Means, standard deviations (SD), and linear correlations of rumen pH as measured by a bench pH meter and by a continuous telemetry system at different pH ranges.

Method	Average pH measured		Normal pH range (>5.6)		SARA pH range (5.6 < pH ≤ 5.0)		ARLA pH range (≤5.0)
	Mean	SD	Mean	SD	Mean	SD	Mean	SD
pH bench	5.48^A	0.99	6.64^A	0.40	5.40^A	0.14	4.54^A	0.27
Telemetry system	5.38^B	1.01	6.42^B	0.37	4.80^B	0.44	4.33^B	0.30
𝑃^∗	0.001		0.002		0.047		0.001
𝑟^2†	0.87		0.63		0.53		0.53
𝑟^‡	0.94		0.79		0.73		0.73

Superscripts indicate difference (*P < 0.05) as determined by Student’s t-test; ^†determination coefficient; ^‡correlation coefficient.