Variants in the neutralization of fish oil to obtain effluent with fertilizing properties.

Abstract

Currently, an important trend in the agricultural activity is the development of organic agriculture. In this context, the application of a fertilizer derived from an effluent of the oilseed industry, to beet (Beta vulgaris L.), is evaluated, with the objective of improving the agronomic characteristics of beet and complementing the chemical deficiency of the soil in OM and N. The modified effluent is obtained from fish oil wash water, which contains nutrients, highlighting K, P and N. The experiment was conducted in a crop field, using completely randomized block design, with five treatments: T1, T2, T3, T4 and T5 with fertilizer doses of 0, 2, 3, 3, 4, 5 L/ha, respectively, applied to the beterraga. The results show a modified effluent with fertilizer properties, particularly for its high concentration of N (25.76 g/L) and its content in K and P. By changing the neutralizing agent and other complementary chemicals intended to confer fertilizer properties to the effluent produced in the oil refining process, a fertilizer was obtained that was applied to the beet crop in five treatments, highlighting the fourth treatment T4 with a yield of 23.97 t/ha.