Abstract
In this study, the effects of in-shelter gas concentration on milk yield and total dry matter intake (TDMI) of buffaloes during the spring and summer periods were investigated. The research was carried out in a shelter with 20 main Anatolian buffaloes between March and July. Values for temperature, relative humidity, air velocity, and CH4, NH3, and CO2 gases were recorded in the shelter. Data records were collected continuously for 24 hours for 4 days. Milk yield and DMI of buffaloes were also determined. As it was observed, higher air velocity in the house reduces the methane gas levels (P<0.01). The regression equation between milk yield and relative humidity was Y= 6.011-0.03RH and showed a negative and low degree correlation. It was illustrated that TDMI varied between 11.00 ± 0.12-13.20 ± 0.06 kg during the summer. The difference observed between months in terms of feed intake was found to be statistically significant (P<0.05). Although the milk yield of water buffalo was low in March, it increased in April and May. However, there was a decrease in DMI (0.50 kg/day) and milk yield (264 mL/day) for an increase of + 1 °C in air temperature. The recorded values for CO2 concentration in the buffalo shelter during the summer period varied between 620-1120 ppm. Considering the obtained results, NH3 and CO2 gas levels in the shelter were below the higher limits and can be considered as not dangerous for animal and human health. It was determined that regression equation between feed intake and temperature was Y= 9.901 + 0.089T**, regression coefficient was R2= 0.19 and correlation coefficient was r= 0.44 (P<0.001).
Highlights
Gas changes occurring in the shelter and indoor environmental conditions, in general, are important parameters that affect animal health and performance
Controversial findings have emerged in studies conducted with ammonia during the summer period, and it has been reported that these discrepancies could be possibly attributed to the environmental conditions inside the shelter
It can be concluded that this decrease is the result of the increase in ambient temperature, the increase in temperature caused by the breakdown of nutrients in the body, triggering heat stress in the buffaloes and the resulting reduction in feed intake, leading to insufficient ingestion of nutrients for milk synthesis (Degirmencioglu 2020)
Summary
Gas changes occurring in the shelter and indoor environmental conditions, in general, are important parameters that affect animal health and performance. The present study aiming at the observation of the effects of changes in the environmental conditions inside the shelter on milk yield and dry matter intake in buffaloes. For this purpose, 24-hour continuous measurements were recorded for 4 days in the summer season at the buffalo shelter. 24-hour continuous measurements were recorded for 4 days in the summer season at the buffalo shelter Indoor environmental conditions such as NH3, CH4, and CO2 gas concentrations and temperature, wind, and relative humidity were determined in the buffalo barn
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