Efeitos da cinza de biomassa de eucalipto no desenvolvimento de Panicum maximum cv. mombaça

Abstract

The ash of eucalyptus biomass can be an alternative for sustainable farming, because the use of this residue besides presenting essential nutrients for pasture cultivation as K, P and Mg besides conditioning effect, raise the saturation of the bases and increase the pH of the soil. The objective was to evaluate the development of Mombasa grass as a function of doses of eucalyptus ash, doses that T0= 0 t/ha, T2= 2.5 ton/ha cover (C), T3= 2.5 ton/ha incorporated (I), T4= 5 ton/ha C, T5= 5 ton/ha I, T6= 7.5 ton/ha C, T7= 7.5 ton/ha I, T8= 10 ton/ha C, T9= 10 ton/ha I. The experiment was developed in a greenhouse, where plant height, leaf area, root length, root volume, root number, root fresh matter, root dry matter, aboveground fresh matter and aboveground dry matter were evaluated. It was observed that the development of the culture presented a decrease of utilization as the dose of ash increased, that is, presenting the control as the dose that over came out in relation to the others. Being able to be the effect of the elevation of the pH beyond the necessary since the soil presenting a high pH, impairing the absorption of nutrients essential for the development of the culture, as well as the low solubility of the ash in the soil