Feed and Methane Efficiency in Cows and Their Calves

Greenhouse gases, including methane, contribute to global warming. The digestion of feed by cattle and other ruminants results in methane emissions. Efficient production—which yields a high amount of milk or meat per kilogram of feed—results in lower emissions per kilogram of product. In addition, it has been observed that methane emissions vary greatly among individual animals. The aim of this doctoral project is to investigate whether there are genetic correlations, such that feed-efficient cows produce feed-efficient calves and/or cows with low methane production produce calves with low methane production. Furthermore, a model is being developed to estimate individual animals’ feed intake based on their exhaled air. The dairy cows are part of Lantmännen’s herd at Framtidsgården Viken, while their calves are raised at SLU Götala Beef and Lamb Research Centre. If feed and methane efficiency prove to be heritable in cattle, breeding efforts can be directed toward more efficient animals. This could ultimately lead to more sustainable and profitable agriculture.

The project is part of SustAinimal, which aims to increase knowledge about the role of food-producing animals in a sustainable and profitable food system. This subproject is a collaboration primarily with Lantmännen and Växa Sverige.

The project is funded by Formas through SustAinimal, Lantmännen, the Lantmännen Research Foundation, Växa Sverige, the JTI Foundation, the Västra Götaland Region, the Skaraborg Cattle Foundation, Agroväst, and SLU.