Crescimento e fitomassa da beterraba sob irrigação suplementar com água de diferentes concentrações salinas

Abstract

The use of saline water in agriculture is a viable alternative in view of the increased freshwater demand. The objective was to evaluate the growth and biomass of beet under irrigation with water of different saline concentrations, in an experiment conducted under field condition in the campus of the Universidade Federal de Alagoas - Arapiraca. The treatments were five levels of electrical conductivity (S1: 1.0, S2: 2.0, S3: 3.0; S4: 4.0; S5: 5.0 dS m-1). The maximum yield of beets at 27 days after saline treatments was obtained with salinity of 3.0 dS m-1, for the variables plant height (PH), stem diameter (SD), root length (RL), shoot dry biomass (SDB), and total dry biomass (TDB). At 42 days after application of saline treatments, the variables shoot fresh biomass (SFB), root fresh biomass (RFB), total fresh biomass (TFB), shoot dry biomass (SDB), and total dry biomass (TDB) increased with increasing salinity. Rain may have influenced the results obtained for the evaluations performed at 42 days after application of saline treatments.