Changes in the Chemical Characteristics of Latosol Associated with the Application of Ash and Organic Compost in an Area under Cultivation of Sugarcane

Abstract

The aim of this study was to evaluate the transport of metals in three different depths of a vegetated soil with cane sugar, organic compost as fertilizer using and bagasse ash. The experiment was conducted in areas of a sugarcane mill in the central state of Goiás, Brazil. Six areas were sampled at five points each and at different depths (0-60 cm). Were evaluated the concentrations of metals in the soil, such as P, K, Ca, Mg, Cu, Mn and Cr, beyond the parameters of soil fertility, P, organic matter, pH, H + Al, K, Ca, Mg, CEC, sum of bases (SB), base saturation (V) and aluminum saturation (m Al). At the end of these analyzes, the data were subjected to analysis of variance and regression. The results for the fertility of the soils indicated that in general nutrient levels were higher for the topsoil. The application of gray promoted significant (Pr < 0,05) in total concentrations of Cu, Mn and Cr in soil at three depths studied and Mg at intermediate depth (20-40cm). Different years of application of organic compost influenced only the total concentrations of P and Cu in the topsoil. While in subsequent layers, there are significant differences only for K and Ca in layers 20-40cm and 40-60cm, respectively. I. INTRODUCTIONAccording to Conab (2020), the area cultivated with sugarcane in the Brazilian crop 2020/2021 is estimated at approximately 9.87 million hectares and is expected to grind 630.71 million tons of sugarcane, distributed in all producing states. For each ton of sugarcane are generated about 260 kilos of bagasse which, when burned in boilers, produces approximately 6 kilos of ash, which contains about 77% of quartz sand and coal powder. Thus, there are approximately 3.78 million tons of ash available in the sugar and alcohol industry of the country.Several studies report that sugarcane ash is rich in macro and micronutrients such as K,