Grazing cheapest if conversion OK

摘要

Grazed grass is only the cheapest feed when used efficiently. Much of its benefit can be lost due to poor feed conversion, says Keenan's nutrition director David Beever. In May, its low structural fibre, high sugar and protein made it pass too quicklythrough the cow and much of its value was lost, Prof Beever told a Grassland forum. "A lack of suitable fibre reduces cud chewing and compromises rumen digestion leading to sub-clinical acidosis. Cows need to harvest 100kg a day of fresh grass just to achieve satisfactory levels of DM intake and milk production."