SOLID SCIENCE: Contrasting genotypes of dairy cows can use feed energy with similar efficiencies for milk production, but they require more energy for maintenance of basal activities when managed under low than high input systems. This result needs to be implemented in practice to improve production efficiency and reduce environmental footprint.
By Dr. Tianhai Yan
A dairy cow needs enough nutrients to meet her requirements for basal activity, milk production, body weight gain and pregnancy. These demands are determined by calculation of amount of feed energy requirements using dairy cow energy rationing systems.