<b>Partição da biomassa e qualidade da forragem de Bahiagrass: <em>Paspalun notatum</em> cv. pensacola no centro-norte da Flórida</b> - DOI: 10.4025/actascianimsci.v28i4.596

Abstract

This experiment evaluated a pensacola Bahiagrass pasture (Paspalum notatum Flüggeé). It was conducted near Gainesville, Florida, USA, to measure the effect of pasture management on biomass allocation (kg ha ^-1) of herbage, litter, root+rhizome, as well as forage quality. Treatments were three continuously stocked (low, moderate, and high, receiving 40, 120, and 360 kg N fertilizer ha^-1 yr^-1and with stocking rates of 1.2, 2.4, and 3.6 AU ha^-1, respectively) and one rotationally stocked (RS; 7 -d grazing and 21-d rest periods; N rate of 360 kg ha^-1 yr^-1, 1 AU = 500 kg) pasture. The root+rhizome biomass was 4 to 12 times greater than herbage biomass. There was no effect of treatment on root+rhizome biomass. The root+rhizome biomass decreased during the grazing season. The greater manageme nt intensity imposed on high and RS pastures resulted in greater herbage biomass. The root/herbage ratio decreased with the intensification of management. The litter biomass turned to be greater than herbage biomass in the high and RS treatment, characteri zing the different cycling pattern that goes through the animal excretions. Treatments affected neither herbage NDF nor IVDOM, but increasing management intensity tended to result in high IVDOM.