Indicators for Use of Sewage Sludge in Rice Culture in Sandy Latosol

The upland rice cultivation requires a large supply of nutrients, which are supplied, usually for mineral fertilizers. This need fertilization can be replaced by organic fertilizers, such as sewage sludge. This study aimed to verify the effect of sewage sludge doses on the development of rice grown in sandy soil of low fertility in order to obtain indicative to determine proper dosage use of it. An experiment in pots using a sandy clay loam soil of sandy texture, in which we used a randomized blocks with five replications was conducted. The treatments were constituted by conventional mineral fertilizer and the addition of sewage sludge corresponding to a dosage of 0, 5, 10, 20 and 40 t ha -1 supplemented with nutrients to achieve the recommended levels, a total of six treatments. It evaluated the fresh weight of shoots and roots, dry weight of shoots and roots, plant height and number of tillers. It was found that the addition of sewage sludge increased the production of fresh and dry weight of shoots and roots, as well as height and number of tillers of rice plants.