Effect of environmental factors on milk production under commercial dairy farms in Chittagong area

Abstract

The study was conducted to investigate the effect of environmental factors on milk production under commercial dairy farms in Chittagong areas. The study was carried out in twelve different dairy farms from August to September 2017 at the Chittagong Metropolitan Area (CMA). The data was collected from different farm on environmental effects (net covering, ventilation, lighting, total fan, temperature, humidity, feed passage, water passage, milk yield, light distance from the ground, water source, manger passage, flooring system, bedding materials, shed height and foot bath) on milk production of Holstein crossbred. Collected data were analyzed to investigate correlation between milk yield and environmental parameters. Among all environmental factors, it was observed that the correlation between milk yield with light (0.17) and fan (0.10) was positive but temperature (-0.23) and humidity (-0.27) was negative. Similarly, light had positive correlation with fan (0.70) and temperature (0.31) whereas negative correlation with humidity (-0.03). It was also observed that fan had showed positive correlation with temperature (0.42) and negative correlation with humidity (-0.22) whereas Temperature was negatively correlated with humidity (-0.24). ). The study result was indicated that all of the traits were negatively correlated with humidity. The study revealed that increasing humidity percentage will be resulted to decrease milk production. The study results suggested that if farmers provide favorable environment to the farm, they will get maximum milk production. Further investigation should be recommended.