Uso de calcário e qualidade de água utilizada em sistemas aquícolas

Abstract

This study evaluated the effect of limestone application as a method to minimize the negative impacts of aluminum in soil on water quality used in aquaculture systems. The study was conducted at the Aquaculture Production Laboratory of the Federal University of Grande Dourados, using acidic soils and medium alkalinity water. Three treatments were tested: limestone application based on soil base saturation, limestone application based on water characteristics, and a control without limestone addition. The results demonstrated that limestone application, particularly using the base saturation method, was effective in maintaining critical water quality parameters such as pH, alkalinity, and hardness within optimal levels for aquatic organism production. The pH was maintained at neutral levels in the treatments with limestone, whereas the control exhibited acidification. Alkalinity and hardness also increased significantly with limestone application, providing greater chemical stability and better conditions for cultivation. Additionally, treated soils showed improvements in parameters such as base saturation and reduced aluminum saturation, contributing to a more suitable environment for production. The findings confirm the importance of liming as a management practice in aquaculture systems, highlighting the efficiency of the method based on soil base saturation. It is recommended to apply limestone carefully and continuously monitor water quality to optimize production and ensure sustainability.