SOIL FERTILITY ASSESSMENT OF A FARM IN THE REGION OF PIRASSUNUNGA SP - BRAZIL SUBJECT TO VINASSE APPLICATION
DOI:
https://doi.org/10.15809/irriga.2021v26n2p439-459Abstract
A monitoring study of the parameters of soil fertility was performed in a farm fertirrigated with vinasse, located in the state of São Paulo, over the period from 2012 to 2017. Soil samples were collected to provide information about mineralogical and metal concentration, as a complement to the analysis of the vinasse application effects on soil characteristics. There were significant alterations in the chemical properties of the soil over time, being the vinasse application one of the factors that influenced the variation of the soil characteristics, combined with environmental factors and agricultural management. The base saturation decreased on average from 64 to 40% between 2012 and 2017, respectively, while the mean annual volume of vinasse was 188 ± 31 m3. ha-1. The increasing trend along the years for the parameter aluminum saturation was remarkable and the pH values were around 5. Although the adoption of vinasse application in the soils provides the availability of nutrients and water, it is recommended that the monitoring and control of the soil quality be performed at all times, in order to ensure its fertility and the sustainability of sugarcane production.
Keywords: vinasse application, soil chemical characteristics, vinasse dosage, environmental impacts on soil.
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