Abstract

"A study was carried out to evaluate the effect of supplementation in the shade in summer months for cows grazing on a perennial pasture of clover-ryegrass (Trifolium repens L. - Lolium multiflorum L.). Four treatments were compared: I. Day and night grazing without supplementation; II. Day and night grazing plus supplementation; III. Day and night grazing plus supplementation in the shade between 11:30 and 17:00 h; and IV. Day and night grazing plus supplementation in the sun between 11:30 and 17:00 h. Thirty-two Holstein cows with an average production of 20.5 L d-1 were used, and assigned to the four treatments in a completely randomized block design. There were no significant (P