Changes in reticulorumen content temperature and pH according to time of day and yearly seasons

Antanaitis, Ramūnas; Žilaitis, Vytuolis; Juozaitienė, Vida; Stoškus, Robertas; Televičius, Mindaugas

doi:10.1515/pjvs-2016-0097

Cited by 13 publications

(18 citation statements)

References 17 publications

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“…The relationship between the external drivers of feed intake and the intrinsic rhythm of rumination may affect the digestion of feeds and rumen buffering. Most experiments show that rumen pH reaches a nadir approximately 7 to 9 h after feed delivery in cows fed a TMR once or twice per day, but the pattern varies among experiments (Dado and Allen, 1993; Nikkhah et al, 2011; Antanaitis et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

The effects of source and concentration of dietary fiber, starch, and fatty acids on the daily patterns of feed intake, rumination, and rumen pH in dairy cows

Salfer

Morelli

Ying

et al. 2018

Journal of Dairy Science

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The daily patterns of feed intake and rumination influence rumen fermentation, rumen pH, and timing of absorbed nutrients in the dairy cow, but the effects of diet composition on these patterns are not well characterized. Data from 3 previously published experiments were examined to determine the influence of dietary starch, fiber, and fatty acids (FA) on daily patterns of intake, rumination, and rumen pH. Dietary neutral detergent fiber (NDF) and starch were investigated in 2 experiments, each with duplicated 4 × 4 Latin square designs with a 2 × 2 factorial arrangement of treatments in cows fed cows 1×/d at 1200 and 1400 h, respectively. To investigate fiber content and digestibility in the first experiment, brown midrib or isogenic conventional corn silage were fed in low- and high-NDF diets (29 and 38%, respectively). To investigate starch source and concentration in the second experiment, ground high-moisture corn or dry ground corn were fed in low- and high-starch diets (21 and 32%, respectively). Effect of fat concentration and saturation was investigated in the third experiment using a replicated 4 × 4 Latin square design that fed cows 1×/d at 0900 h; treatments included a control diet with no added fat and 2.5% added saturated FA, unsaturated FA, or a mixture of the saturated and unsaturated FA. In the first 2 experiments, intake followed a similar daily pattern regardless of starch and NDF concentration or digestibility. Rumination displayed a treatment by time interaction for both NDF and starch concentration, with high-fiber, low-starch diets causing greater rumination overnight but not midday. High-starch diets decreased total daily rumen pH equally across the day, but did not change the daily pattern. Type of corn silage did not affect the daily patterns of rumination or rumen pH, but pH was reduced throughout the day in brown midrib diets. In the third experiment, no interactions between fatty acid supplement and time of day were observed for intake, rumination, or rumen pH. Within all experiments, rumination fit or tended to fit a 24-h rhythm regardless of diet, with the amplitude of the rumination being reduced in low-starch diets and diets containing saturated FA or a mixture of saturated and unsaturated FA. Overall, intake, rumination, and rumen pH follow a daily pattern that was minimally modified by dietary fiber and starch type and level or fat level and fatty acid profile.

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Section: Introductionmentioning

confidence: 99%

The effects of source and concentration of dietary fiber, starch, and fatty acids on the daily patterns of feed intake, rumination, and rumen pH in dairy cows

Salfer

Morelli

Ying

et al. 2018

Journal of Dairy Science

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“…According Renaudeau et al [5] heat-stressed dairy cows reduced the feed intake to avoid excessive metabolic heat production, while maintenance costs increased [49]. However, recently, it was demonstrated that reduced intake accounted for only 35% of the decline in milk yield under heat stress conditions, and it was suggested that a shift in postabsorptive metabolism and nutrient partitioning might account for the remaining reduction in milk yield [50]. Mean air temperature had the greatest influence on milk yield for Holstein cows fed high or low concentrate diets under hot conditions [51].…”

Section: Heat Stress and Rt Bw And CCmentioning

confidence: 99%

Evaluation of Biomarkers of Heat Stress by Using Automatic Health Monitoring System in Dairy Cows

Antanaitis¹,

Juozaitienė²,

Televičius³

et al. 2020

Preprint

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The objective of this study was to evaluate biomarkers of heat stress (HS) from automatic milking system (AMS), the relationships between measurements of temperature-humidity index (THI) and reticulorumen ph and temperature and some automatic milking systems parameters in dairy cows (rumination time (RT), milk traits, body weight (BW) and consumption of concentrate (CC)) during summer period. The experiment was carried out on a dairy farm at 54.9587408, 23.784146. Lithuanian Black and White dairy cows (n=365) were selected. The cows were milked with Lely Astronaut® A3 milking robots with free traffic. The rations were calculated to meet physiological requirements of the animals. Daily milk yield, rumination time, body weight, milk fat and protein ratio were collected from the Lely T4C management program for analysis. The pH and temperature of the contents of cow reticulorumen were measured using specific smaX-tec boluses manufactured for animal care. The daily humidity and air temperature in the farm zone were obtained from the adjacent weather station (2 km away). According this study during HS, the higher THI had positive correlation with ML, which show tendencies to increase risk of mastitis, and decrease CC, RT, BW, MY, reticulorumen ph and F/P. Some biomarkers of HS can be milk yield, milk lactose, somatic cell count, concentrate conception, rumination time, body weight, reticulorumen ph and milk fat – protein ratio. We can recommend to monitoring these parameters in the herd management program to identify possibility of heat stress.

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“…Cellulolytic bacteria digest fiber effectively at this pH level, which is inhibited at pH values lower than 6.0 [ 10 ]. As a result, a decrease in ruminal pH increases acidity, which increases abomasum temperature [ 11 ]. The reticuloruminal temperature monitoring clearly reflects the cows’ feed- and water-consumption habits [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Relationship between Reticulorumen Parameters Measured in Real Time and Methane Emission and Heat Stress Risk in Dairy Cows

Antanaitis

Anskienė

Rapaliutė³

et al. 2022

Animals

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The objective of this study was to investigate a connection between CH4 emissions and reticulorumen pH and temperature. During the experiment, we registered the following parameters: reticulorumen pH (pH), reticulorumen temperature (RR temp.), reticulorumen temperature without drinking cycles, ambient temperature, ambient relative humidity, cow activity, heat index, temperature–humidity index (THI), and methane emissions (CH4). The experimental animals were divided into two groups based on the reticulorumen pH: 1. pH < 6.22 and 2. pH 6.22–6.42. We found that cows assigned to the second pH class had higher (46.18%) average values for methane emissions (p < 0.01). For the other indicators, higher average values were detected in cows of the first pH class, RR temperature (2.80%), relative humidity (20.96%), temperature–humidity index (2.47%) (p < 0.01), and temperature (3.93%) (p < 0.05), which were higher compared to cows of the second pH class. Reticulorumen pH was highly negatively correlated with THI and temperature (r = −0.667 to 0.717, p < 0.001) and somewhat negatively with heat index, relative humidity, and RR temperature (r = −0.536, p < 0.001; r = −0.471 to 0.456, p < 0.01). Cows with a higher risk of heat stress had a higher risk of lower reticulorumen pH.

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Changes in reticulorumen content temperature and pH according to time of day and yearly seasons

Cited by 13 publications

References 17 publications

The effects of source and concentration of dietary fiber, starch, and fatty acids on the daily patterns of feed intake, rumination, and rumen pH in dairy cows

The effects of source and concentration of dietary fiber, starch, and fatty acids on the daily patterns of feed intake, rumination, and rumen pH in dairy cows

Evaluation of Biomarkers of Heat Stress by Using Automatic Health Monitoring System in Dairy Cows

Relationship between Reticulorumen Parameters Measured in Real Time and Methane Emission and Heat Stress Risk in Dairy Cows

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