Supplementation for dairy cattle in Xaraes grass pasture in rainy season/Suplementacao de vacas leiteiras em pastagens de capim Xaraes no periodo das aguas/Suplementacion de vacas lecheras mantenidas en pasto Xaraes durante el periodo de lluvias

The present work aimed to evaluate energy and multiple supplements supplied to 2 and 4 kg animal day, in addition to mineral mix, on the performance and costs of milk production during the rainy season. The experiment was conducted in the experimental area consisted of five paddocks of 0.45 ha, with the Xaraes grass, and equipped with water and supplements dispenser covered, with a duration of five periods of 14 days, with 70 experimental days. Five Girolando dairy cows were used, with approximately six years of age and body weight of 460 kg randomly divided into a 5x5 Latin square design. After milking, the milk was weighed at 12, 13 and 14 days of each experimental period after the morning and afternoon milking to measure the performance of animals. There was no effect of supplementation on milk production (P> 0.05), have been observed the average of 8.21 kg milk animal day. Gross margins per kg milk produced for the supplements used were 0.54, 0.43, 0.38, 0.40 and 0.32 respectively for mixing mineral supplements, energy supplied to 2 and 4 kg, and provided multiple at 2 and 4 kg animal day. Keywords: palisade grass, energy, grass milk, protein. Objetivou-se avaliar suplementos energetico e multiplo fornecidos em quantidades de 2 e 4 kg animal dia, alem da mistura mineral, sobre o desempenho produtivo e custos da producao leiteira, durante o periodo das aguas. O experimento foi conduzido em area experimental constituida por cinco piquetes de 0,45 ha, formados com o capim Xaraes, e providos de bebedouros e cochos cobertos com duracao de cinco periodos de 14 dias, totalizando 70 dias experimentais. Foram utilizadas cinco vacas Girolando no terco medio de lactacao, com aproximadamente seis anos de idade e peso corporal medio de 460 kg, distribuidas aleatoriamente em um delineamento quadrado latino 5x5. O leite foi pesado nos 12, 13 e 14 dias de cada periodo experimental apos as ordenhas da manha e tarde para mensuracao do desempenho dos animais. Nao houve efeito da suplementacao sobre a producao de leite (P>0,05), sendo a producao media diaria de 8,21 kg leite animal dia. As margens brutas por kg de leite produzido para os suplementos utilizados foram de 0,54; 0,43; 0,38; 0,40 e 0,32 respectivamente para os suplementos mistura mineral, energetico fornecido a 2 e 4 kg e multiplo fornecido a 2 e 4 kg animal dia. Palavras-chave: capim brachiaria, energia, leite a pasto, proteina. El objetivo fue evaluar el rendimiento y los costos de produccion de la leche dur