Avaliação da produção de matéria seca e capacidade de suporte do capim tifton 85 (Cynodon sp cv Tifton 85) sob condições irrigadas e de sequeiro em ambiente de cerrado.

Abstract

The pasture has represented the most practical and economical form of cattle feeding. Optimistic perspectives of demanding product increasing from pasture grown animals which want to manage greater yields in cattle ranching. Thus, the increasing of the available dried matter with quality, in order to enlarge the capacity of pasture support, having a real possibility with irrigation. The aims of this work were assessing the Tifton 85 production, under irrigated and fertilized conditions and irrigated and non-fertilized conditions, compared to a fertilized non-irrigated treatment and a non-fertilized non-irrigated treatment in a savanna environment. The experiment was carried in the FAZU-FUNDAGRI school farm, Faculdades Associadas de Uberaba, in 780m altitude, 19°44’ South latitude and 47°57’ East longitude, in an assessment period from April’2005 – November’2005. To have this experiment done two 0,1ha areas were used, which were divided into two fragments (fertilized and non-fertilized), having four different treatments (IA – Irrigated and Fertilized; INA – Irrigated and Non-fertilized; SA – Fertilized Non-irrigated; and SNA – Non-fertilized Non-irrigated). The results follow that forage production, the climate features, such as: the daily average temperature and the photoperiod determine the production during the year, even leaving the water deficit out in the soil (irrigation). The fertilizing practice enabled an increasing of 6.14 UA/ha in the non-irrigated treatment supporting capacity and 9.25 UA/ha in the irrigated treatment supporting capacity.