AVALIAÇÃO DESCRITIVA, PRODUTIVA, ESPACIAL E SAZONAL DA VEGETAÇÃO HERBÁCEA SOB FLORESTA OMBRÓFILA MISTA EM SISTEMA FAXINAL

Abstract

The Faxinal System has historical, social and environmental importance, so it is important to make an evaluation of its components to know its status. One of the main components of Faxinal system is the space of common breeding, which is collective use of space where develops silvipastoral activity to create various animal species and conserve the remnants of Ombrophilous Mixed Forest. The aim of this study was to describe, check the production and spatialize herbaceous vegetation of the common studied Faxinal breeding, and specifically as variables Herbaceous floristic composition, forage productivity, the percentage of bare soil and productive spatial behavior of naturalized pasture. The evaluations were performed seasonally, and to the descriptive and productive ratings were used the Botanal methodology, while the spatial assessment was with geostatistical parameters and IDW interpolation. The analyzed area was the common breeding of Low Marmeleiro Faxinal in Rebouças - PR. The data collection was conducted in a completely randomized design (CRD) with four treatments that were the seasons (spring, summer, autumn and winter) in 50 permanent forest plots of 10 m x 50 m. The herbaceous survey recorded 31 herbaceous species in 17 botanical families. The naturalized pasture production from Faxinal averaged 416.10 kg DM ha-1, with the occurrence of seasonality in forage production, which in the spring presented its most productive potential with 565.73 kg DM ha-1 and the fall was the lowest yield potential with 275.68 kg DM ha -1. It was recorded that the forage species Axonopus compressus (Sw.) P. Beauv is the main forage species, despite the weeds form considerable part of total production. The seasonal average percentage of bare soil was 39.5%. The geostatistical analysis of production data showed that there is not spatial dependence and thematic maps demonstrated the productive spatial variability that is common breeding in Faxinal with interpolated data by Distance Weighted Inverse. Due to the exposed, it can be concluded that the Faxinal has a common unproductive breeding, seasonal, dependent on one species, with considerable bare soil percentage and production data without spatial correlation, possibly due to the disorder that has grazing.