Published online by Cambridge University Press: 21 November 2017
Ruminant production systems can have a negative effect on the environment within three main areas 1) loss of nutrients to aquatic environment, 2) loss of nutrient to the aerial environment and 3) contribution to the global increase in temperature (green house effect).
In Denmark area 1) is considered as a very serious problem in particular NO3-leaching from the agricultural land. Within area 2) the loss of NH3 from ruminant production is considered as a major problem. Concerning the green house effect (area 3)) the loss of N20, C02 and CH4 are considered as a problem in connection to ruminant production.