Effect of trace elements on growth and N metabolism in young cattle

Spasskov, V.I.

Zhivotnovodstvo 1968(5): 29


For a preliminary period of 15 days 4 groups of 5 heifers over one year old were given hay of vetch and oats 2, concentrates 1.6, maize silage 15 kg, salt 45 and defluorinated phosphate 75 g. For the trial period of 63 days, 2 groups had extra cobalt chloride or copper sulfate. For one group the silage of maize was replaced by one of a mixture of maize and soya 4: 1 and the last group continued on the original ration.