Technical note: Evaluation of a real-time wireless pH measurement system relative to intraruminal differences of digesta in dairy cattle1,2
| Autor: | Qendrim Zebeli, A. Khol-Parisini, M. Qumar, P. Pourazad, Fenja Klevenhusen, Stefanie U. Wetzels |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Journal of Animal Science. 92:5635-5639 |
| ISSN: | 1525-3163 0021-8812 |
| DOI: | 10.2527/jas.2014-8038 |
| Popis: | The aim of this study was to evaluate the accuracy and precision of indwelled wireless sensors relative to intrareticuloruminal differences in dairy cows transitioned from a forage to a high-concentrate diet. A feeding trial was performed with 8 rumen-cannulated Holstein cows. The cows were stepwise switched from 0 to 60% concentrate in the diet and fed 5 wk. Samples from the free ruminal liquid (FRL) from the ventral rumen and from the particle-associated ruminal liquid (PARL) in the rumen mat were manually taken at 0, 4, and 8 h after the morning feeding on d 0, 7, 14, and 34 of the experiment through the ruminal cannula to measure pH in FRL and PARL using a pH electrode. Additionally indwelling reticular wireless pH sensors were used to measure reticular pH every 10 min throughout the experiment. Precision and accuracy properties as a measure of reproducibility of the methods were statistically evaluated. Data showed significant differences among pH readings of indwelling sensors and pH measurements taken by means of a conventional electrode in both FRL and PARL (P |
| Databáze: | OpenAIRE |
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