Acúmulo de biomassa e produção animal em pastos de capim Piatã e Paiaguás em sistema de integração lavoura-pecuária

Abstract

The aim of this work was to evaluate herbage accumulation and animal production on palisadegrass Piatã e Paiaguás [Urochloa brizantha (Syn. Brachiaria brizantha) cv. BRS Piatã e Paiaguás] submitted to integrated systems. The experimental design was randomized blocks with factorial arrangement 2x2 and four area replicates. The swards were managed at two grazing heights, 25 and 40 cm, by continuous stocking rate. Monthly the swards were sampled and the animals weighed. Piatã grass swards presented the biggest herbage and leaf blade masses. No differences were found between grasses to herbage and leaf blade accumulation, stocking rate, average daily gain and herbage offer. The average daily gain was not different by grass height but stocking rate and per area gain were greatest when grass were maintained at 25 cm, 4.7 and 3.6 AU ha-1, and 1,004 and 882 kg ha-1 of corporal wheight, respectively to 25 and 40 cm. Based on the animal production results, Piatã and Paiaguás palisadegrass can be managed at 25 to 40 cm of sward height.