Are we adding too much mineral to cow rations?

摘要

Many UK farms are feeding well over therecommended level of minerals which may be posing all sorts of problems, not only to cow health and the environment but also by eroding dairy margins.Research on 50 farms done by Prof Liam Sinclair of Harper Adams University revealed that of the 10 common minerals examined in cow rations all were being overfed, and the worst case was that of copper which was being supplemented at more than twice the recommended level."People are often feeding more minerals than is needed," declared Prof Sinclair.