Crescimento de variedades de cana-de-açúcar em resposta a calagem no brejo paraibano.

Abstract

The sugarcane is arguably one of the most important crops in the world, raw material for sugar, ethanol and derivatives. Fundamental in the agricultural economy, where Brazil has a prominent position among the countries that produce this commodity. The choice of the variety to be grown in a given region deserves great attention, not only because of its economic importance, but also because its physiology is directly affected by external factors. The objective of this study is to evaluate the response of limestone use and the vegetative development of different sugarcane varieties in Brejo da Paraíba. The work was conducted in the experimental area Chã de Jardim of the Center for Agricultural Sciences - CCA, Campus II, Federal University of Paraíba - UFPB, located in Areia – PB. The experiment was in a randomized complete block design with a 10x2x3 scheme, in which 10 varieties were submitted with and without limestone application, evaluated in three periods, in four replications. The evaluated variables were Average Stem Height, Mean Stem Diameter and Number of Plants per Linear Meter. For the variables analyzed there was a significant effect of liming, varieties and periods individually, there was interaction of varieties and limestone with the days, for all variables except the interaction between liming and days for Number of Plants per linear meter. The best performing varieties were RB962962, RB002754, RB93509 and RB001443. Limestone has a positive influence on the vegetative development of the studied varieties, especially after 150 days after planting.