Desempenho agronômico e atributos do solo em um pomar de bananeira ‘brs princesa’ fertirrigado com substâncias húmicas

Abstract

This research aimed to evaluate the effects of fertigation with humic substances (SHs) on the banana ‘BRS Princesa’ orchard and on the soil under the orchard cultivation. The experiment was conducted during two production cycles in an experimental design of randomized blocks (DBC), with six treatments and four replications. The treatments consisted of fractions of the reference doses (DR) (24,48 kg ha-1): T1 = 100% DR; T2 = 150% DR; T3 = 200% DR; T4= 250% DR; T5 = 300% DR. Treatments were accomplished by 14 applications of SHs in the first crop cycle and 11 in the second one. The soil samples were collected before treatment application and after harvest of the second cycle. It were processed to obtain soil hydrodynamic, chemical and microbiological activity analysis. Biometric evaluations were carried out in four working plants per experimental plot during flowering and harvest period concerning growth and crop production. Analysis of variance and statistical tests did not detect significant effects of the fertigation with SHs on soil properties, growth and production variables. An exception was the time from planting to harvest in the second cycle, which was affected significantly and mathematically adjusted to a linear model, with the best result for the dose of 10.60 Kg ha-1 for the interval from planting to harvesting of 52 days regarding the control.