Desempenho de variedades de cana-de-açúcar sob efeito residual da calagem

Abstract

The use of sugarcane varieties with environmental adaptation, ally soil correction are essential factors for a satisfactory development of cane fields. The present work aimed to evaluate the behavior of different sugarcane varieties under residual limestone effect in the soil and its adaptation in Brejo Paraibano, aiming to select the ones that best express their productive potential under the established conditions. The experiment was conducted at Chã de Jardim Experimental Farm, in Areia-PB. Ten sugarcane varieties and two types of soil management were used, in which a randomized block design (RBD) was adopted in a factorial scheme 10×2, totaling twenty treatments and four repetitions. The parameters evaluated were: number of stalks per linear meter (NS), height of plants (HP), average height of stalk (AHS), average diameter of stalk (DS), number of internodes (NI), ºBrix, and tons of stalk per hectare (TSH). Data were submitted to Analysis of Variance (ANOVA) by F test and subsequent test of means by Scott-Knott criteria, at 5% probability, with aid of R® statistical program. The residual limestone in the soil showed no significant effect for any variables in this study. There was an isolated effect of the varieties for the variables: HP, DS, NI, AHS, °Brix and TSH. The varieties studied had a satisfactory performance in the parameters of the 2019/2020 brazilian harvest, in which the RB002754 stood out, being superior to the national productivity standards, while, with the exception of the RB951541, all other varieties fit above the state standard of Paraíba.