[The behaviour of lactating dairy cows in an outdoor climate stall barn depending on air temperature in the stall].

In this study activity and lying behavior of dairy cows were examined. ALT-pedometers for automatic detection of behavior were used. The results of the investigations show that lactating dairy cows react with altered behavior on different temperatures.

Seasonal and diel variations of ammonia and methane emissions from a naturally ventilated dairy building and the associated factors influencing emissions.

Understanding seasonal and diel variations of ammonia (NH3) and methane (CH4) emissions from a naturally ventilated dairy (NVD) building may lead to develop successful control strategies for reducing emissions throughout the year. The main objective of this study was to quantify seasonal and diel variations of NH3 and CH4 emissions together with associated factors influencing emissions. Measurements were carried out with identical experimental set-up to cover three winter, spring and summer seasons, and two autumn seasons in the years 2010, 2011, and 2012.