Evaluación de un consorcio de bacillus aisladas del manglar de puerto hualtaco para reducir la materia orgánica en sedimentos acuícolas

Abstract

The intensification of aquaculture production generates sediments accumulation, that represent a serious problem for this sector. For this reason, the objective of this experimental work was to evaluate the effect of a consortium of Bacillus spp. strains isolated from mangroves on the degradation of organic matter accumulated in the sediments of shrimp ponds at low salinity. Bacillus spp. strains were massaged in 2% soy peptone for 72 h to reach a bacterial concentration of 109 cfu/ml. The experimental design was completely randomized (CRD), with three treatments of a mixture of bacteria and the addition of nutrients such as nitrogen and phosphorus (T1 12 µL, T2 18 µL and T3 24 µL) plus a control without application of inputs, each with three replicates. The experiment lasted 20 days, during which the percentage of organic matter (Walkley & Black method), the concentration of total nitrogen (Kjeldahl system), which remained stable throughout the experiment, and the concentration of phosphorus (UV-Visible spectrophotometry), which decreased in T1, were analyzed. The results indicate that there are significant differences in the reduction of organic matter according to the doses of the bacterial consortium, with an average decrease of 3.86%. This study concluded that the use of Bacillus spp. constitutes an effective strategy for the reduction of organic matter in aquaculture sediments at low salinity, contributing to the sustainable management of these systems.