Desempenho vegetativo, trocas gasosas e produtividade de cana-de-áçucar adubada com torta de filtro enriquecida.

Abstract

The Sugarcane (Saccharum officinarum L.) is a crop that occupies a privileged position in Brazilian agribusiness. Its processing generates high amounts of organic waste, which has been used as a soil conditioning agent, such as filter cake. In this sense, the present work aimed to evaluate the effect of the use of enriched filter cake on the vegetative performance, gas exchange and productivity of the sugarcane variety RB041443. The work was carried out in the agricultural area of Usina Monte Alegre S/A, located in the municipality of Mamanguape, State of Paraíba, Brazil. The experiment was set up in a randomized block design with 12 treatments, with four replications, totaling 48 plots. The parameters evaluated were plant height, number of leaves, stem diameter, number of internodes, tillering, gas exchange and tons of stem per hectare. The data were submitted to Analysis of Variance by the F test and subsequent test of means by the Scott-Knott criteria, at 5% probability, in addition to being submitted to Principal Component Analysis (PCA). The use of enriched filter cake as a foundation fertilizer in the sugarcane crop allowed for an increase in growth and production variables, with emphasis on the T10 treatment (Cake + Plaster + Bagasse). In addition, the use of enriched filter cake influenced the gas exchange of sugarcane RB 041443, with positive responses, being important more research related to the theme to improve the culture of sugarcane in the State of Paraíba.