Dinâmica e densidade de perfilhos de capim aruana manejados sob lotação contínuo na presença de leguminosa ou nitrogênio

Abstract

The tillering of a pasture is extremely important in handling since it corresponds to an efficient route to which plants condition and adjust their leaf area index and adapt imposed defoliation practices. The aim of this study was to evaluate the patterns of population distribution, appearance rate, tiller mortality and survival in aruana grass pastures (Panicummaximum cv. Aruana) under lotaçãocontínua beef cattle with the presence of legumes or nitrogen, the following treatments GL: Grass aruana + forage peanut; GN: grass aruana + Nitrogen and G: single aruana grass. The foiconduzido work at the Federal Technological University of Paraná, Campus Two neighbors, from December 2014 to March 2015. The experimental area of 6.3 ha foidividida in nine paddocks of 0.7 ha. 42 Nellore crossbreed x Aberdeen Angus x Marchigiana were used. The experimental design was completely randomized with three treatments and three replications. Pickets with aruana and aruana + amendoimforam fertilized with 100 kg N and the pickets of aruana + N treatment received 200 kg of nitrogen Evaluations of demographic patterns of tillers and their respective appearance fees, mortality, survival, stability index tillers were determined every 28 days, choosing two sampling points each. Each sampling point consisted of PVC pipe of 20 cm diameter, stuck into the ground by clips in locations representative of the average condition of the pasture. For evaluating the tiller density foiutilizado a square of 0.0625 m2 for counting the number of basal tillers of aruana grass. The tiller appearance rate was significant and superior to grass Aruana + 100 kg N, and significant and superior to the tiller stability index for Aruana + 100 kg of N, not being significant for the tiller survival and rate tiller mortality.