Residues of cattle slaughterhouse effluent as an alternative fertilizer for the production of rocket

Abstract

The use of high doses of mineral fertilizers recommended for growing vegetables, besides burdening the production process, triggers the environmental imbalance. Thus, the demand for information which enables the use of different waste materials as organic fertilizers has been increasing. Therefore, the objective was to evaluate the effect of rates of residual waste of effluent treatment on morphophysiological income of Eruca sativa L. in central southern region of the state of Tocantins. The experiment was performed with the culture of the rocket, underwent five treatments that consisted of five doses of the residue (0, 20, 40, 60, and 80 Mg ha^-1) and three replications. The characteristics evaluated were: total dry matter (g), leaf number, leaf area (cm²) and net assimilation rate. For every characteristic, samples were collected for analysis at 10, 15, 20, 25, 30 and 35 days after sowing. For all traits there was positive effect of the residual dose, responding to higher doses (60 and 80 Mg ha^-1). The use of refrigerated beef residue as an alternative fertilizer promoted the development of the rocket with an increase in production until the dose of 80 Mg ha^-1.