Study of the ability of biduri plants in bioremediation of pesticides with indigenous bacteria and biochar in shallot planting soil, Brebes, Indonesia

Department of Soil Science, Faculty of Agriculture, Universitas Sebelas Maret, Surakarta, Central Java, Indonesia

^* Corresponding author: retnobs@staff.uns.ac.id

Abstract

The use of pesticides can worsen the climate, while climate change itself increases pest attacks, thus increasing pesticide use. The use of pesticides in Brebes has caused pollution to the environment because it left a residue of 4.05 mg/kg, which has exceeded the maximum residue limit on soil, 0.2 mg/kg. This study aims to determine the effect of treatments on the bioremediation of soil contaminated with pesticides in shallot planting soil. This type of research was an experiment in a greenhouse with a factorial experimental design and using a completely randomized design (CRD) consisting of 2 factors; Indigenous Bacteria (I): without bacteria (I0), Pseudomonas sp. (I1), Consortium of bacteria (I2) and Biochar (B): without biochar (B0), with biochar (B1). There were six combinations, each of which was repeated 3 times to obtain 18 treatment units. The results showed that the levels of pesticides in the soil after treatment decreased compared to the control treatment. The highest reduction in pesticide levels was in I2B1 treatment, which was 3.97 mg/kg or 96.7 % higher than the control. Treatments can reduce pesticide levels in the soil so that it can be used as a method of bioremediation to achieve food security.