Produção de Tifton 85 em sistema silvipastoril de acordo com a época do ano e os renques arbóreos

Abstract

Objective of this work, as to evaluate the production of Tifton 85 forage in an area of silvopastoral system according to the seasons of the year and the distance between the tree roots. The work was carried out in a productive area with approximately five hectares of pasture, composed of Tifton 85 and trees of the species Grevílea robusta with 11 years of age arranged in bands with spacing of 18 m between rows and 2,5 m between plants, with grazing of Jersey dairy cows. Evaluations will be held monthly for one year. Forage samplings were randomly made within the range, the area being subdivided into five ranges among the tree roots, with the verification of the accumulation rate using the exclusion cage, forage mass and leaf height ratio, comparing with both geographical senses. It was observed that within the bands of the tree roots there was no variation in the yield and leaf / stem (1 / 1.45). Within the four seasons, we verified significant differences in all evaluated items, and between the northsouth and east-west directions we verified a difference of (358 Kg DM / ha-1) for forage accumulation.