Residual effect of organic fertilization on radish production

Resumo

This research aimed to evaluate the residual effect of organic compost fertilizers with different doses on the radish production, as well as its effect on soil chemical properties. The experiments were conducted at the Experimental Farm São Manuel, located in the municipality of São Manuel-SP. Experiments were conducted in two soil types (“low” and “high” fertility). Prior to this, these areas were first used to carry out a research about the influence of organic compost with different doses of organic compost on endive production. After harvesting endive, radish seeds were sown into the same plots used for endive to evaluate the residual effect. The six treatments consisted of different doses of organic compost (0, 35, 70, 105, 140 and 175 t ha^-1), evaluated in a complete block experimental design, with four replications. Vegetative characteristics (shoot, root and total fresh and dry matter weight, plant height and root diameter) of radish plants and soil characteristics (macronutrient content, pH, H + Al, organic matter, sum of bases, cation exchange capacity and base saturation) in two dates (11 days after the endive transplant and at the end of the radish cycle) were evaluated. The higher the dose of organic compost, the higher the values of most of the chemical properties of the soil in both dates. The residual effect of organic fertilizer was confirmed by the increase on the radish production highly in initial high fertility soil area.