The aim of this study was to quantify the contribution of soluble organic-C deposition by rice root system and the CO2 evolution during 64 days in an Oxisol samples treated with glucose, and rice roots collected at different plant growth stages (40, 60, 80, 100, 120 and 140 days after sowing). Thereafter, organic matter was fractionated to evaluate the effect of the addition of a root system on the soil humus composition. It was possible to observe the intense rhizodeposition of organic […]

This study was undertaken in Campos dos Goytacazes, northern State of Rio de Janeiro, based on soil samples of a vertic Fluventic Eutrochrepts, which had been cultivated with sugarcane for several decades. In one situation, the crop had been cultivated for 55 years without burning the residues at harvesting. On another sugarcane plantation, harvest residues had been burned, and vinasse inputs applied by sprinkle irrigation at a rate of 120 m3 ha-1 yr -1 during 35 years. Soil samples were collected from the soil layers […]