Capim piatã implantado em sistema silvipastoril

Abstract

Piatã grass is a forage grass launched by EMBRAPA in 2007, with characteristics such as erect growth, aerial tillering, medium size and greater accumulation of leaves than other cultivars of Brachiaria brizantha. The crop-livestock-forest integration system (ILPF) is a form of land use that combines trees, crops and animals in the same area, seeking to optimize natural resources and increase productivity and sustainability. The objective of the work was to evaluate the influence of shade and full sun in a livestock-forest integration system on the nutritional value of Brachiaria brizantha cv. BRS Piatã, a tropical forage launched by EMBRAPA in 2007. The work was carried out at the Instituto Federal Goiano – Campus Morrinhos – GO, in a crop-livestock-forest integration system (ILPF) with eucalyptus trees. The treatments were: full sun and shade (under eucalyptus trees) and the seasons were: winter, spring, summer and autumn. The benefits of this system are the diversification of production, environmental conservation and the protection of animals and pasture. The work evaluated the variables of crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), lignin, indigestibility of neutral detergent fiber (uNDF), total digestible nutrients (NDT) and non-fibrous carbohydrates. (CNF) from piatã grass. The results showed that the nutritional value and chemical composition of piatã grass varied significantly between seasons, being generally lower in winter and higher in summer. The interaction between integration systems and seasons was also significant for some variables, indicating that the shadow effect depends on the time of year. Therefore, choosing the appropriate management system is essential to optimize the nutritional value of piatã grass in all seasons of the year.