Revista Brasileira de Zootecnia
versão On-line ISSN 1806-9290
SANTOS, Manoel Eduardo Rozalino et al. Deferred and fertilized signalgrass: forage production and characteristics. R. Bras. Zootec. [online]. 2009, vol.38, n.4, pp. 650-656. ISSN 1806-9290. http://dx.doi.org/10.1590/S1516-35982009000400009.
This research was carried out aiming to assess the forage mass and its morphological components, pasture height and falling index, bulk density and the forage nutritional value on nitrogen (N) fertilized and deferred Brachiaria decumbens cv. Basilisk pastures. The treatments had 73, 95 and 116-day deferring periods, and 0, 40, 80 and 120 kg/ha N doses. A randomized block design with three replicates and subdivided plots was used. Total forage, green forage and green stem mass, as well as pasture height and forage bulk density increased along with the deferring periods and N doses. The pasture deferred for the longest period showed the highest dead forage mass and falling index. The neutral detergent fiber was high and crude protein (CP) percentage diminished as the deferred period increased. The CP percentage increased as the N dose increased. The deferring period and the nitrogen fertilization equally affected both deferred forage production and characteristics; however the deferred period has a higher magnitude. Performing nitrogen fertilization allows a reduction in the deferring period of pasture without reducing the forage production.
Palavras-chave : Brachiaria decumbens; deferring period; falling index; forage bulk density; forage mass; nutritional value.