Development of common bean cultivated on Histosols samples with differents liming levels

Abstract

The objective of this study was to evaluate the liming effect on the soil chemical attributes, biomass production and N, P and K content in a bean crop, in a greenhouse experiment. Were used soil samples collected from 0-20 cm layer of a Histosol in the region of Santa Cruz, Rio de Janeiro State, Brazil. The experimental design was randomized, with six treatments and five replications. The treatments consisted of five base saturation (V) values: 30; 45; 60; 75; 100%, and a control with natural soil saturation. At the end of the cycle, the biomass was collected and dried in an oven at 65 °C for 48 hours. After drying, were determined the weight of dry matter and N, P and K content. After plant collection, soil samples were collected from the pot, and pH, Ca, Mg, Na, H+Al, Al, P and K were determined. It was verified that the saturation to 43% the Al was completely neutralized and a significant increase in Ca, without reduced available P in the soil. The biomass production and nutrient accumulation described a quadratic model as a function of bases saturation increasing. There was a significant increase in dry matter production and N, P and K extraction by bean from the lowest liming rate, and decreasing the increments with the higher doses of lime application.