Manejo da adubação mineral e orgânica na nutrição e produtividade agroindustrial de variedades de cana-de-açúcar em ambientes de produção restritivos

Abstract

The sugarcane industry annually generates large volumes of by-products (filter cake and vinasse) that can be used in their crops, reducing fertilization costs, and providing nutrients for the soil, however, there is a lack of studies that used a survey of large amounts of data from a power plant to assess this effect. In this context, the aim of this study was to evaluate the effects of different fertilization managements in planting and covering in different production environments on stalk yield and chemical attributes of soil and leaf in sugarcane. The research was conducted at the Ipê mill, located in the city of Nova Independência - SP for a period of two consecutive harvests (2018/2019) and (2019/2020) and the sugarcane cultivars used were (RB 966928) and (CTC 4), which are the most representative of the region practiced by that company. The experimental design used was a split-plot in time with ten replications. Each repetition was represented by a plot within the plant's cultivation area, selecting those that were homogeneous between the years 2018 and 2019. The plots consisted of 3 treatments (T1 - Mineral fertilization in planting and stump; T2 – Mineral fertilizer in planting and vinasse in the stump; T3 – Fertilization with filter cake in the planting and vinasse in the stump), and the subplot consisting of years of cultivation. The application of vinasse in ratoon cane, associated or not with filter cake planting, contributed to the improvement of the production environment D in relation to C and provided the highest production of sugarcane and sugar stalks per hectare in the studied cultivars.