Crescimento inicial de Parkia mutijulga Benth sob influência de polímeros hidro-retentores

Abstract

It evaluated hydrogel concentrations and tubes volumes in the initial growth of Parkia mutijulga Benth suspended in ponds during the dry season in northern Mato Grosso. The experiment was conducted at the production plant of the Federal University of Mato Grosso - UFMT, Campus Sinop, from June to September 2015. The experimental design was completely randomized in a factorial 2 x 5 and the cartridge volume in two levels (290 and 820 cm³) and hidroretentor polymer doses in 5 levels (0 g L-1, L-1 0.0025 g, 0.005 g L-1, L-1 and 0.0075 g 0.01 g L-1) that were applied weekly in tubes. The water supplementation to restore the volume of water lost by evapotranspiration, was based on the Class A tank located about 20 m away from the experimental area. Significant differences were observed in the growth of seedlings in different volumes of tubes in all parameters. Treatments with different hydrogel concentrations showed significant differences in the analysis of growth in height, stem diameter and number of leaflets. Being the best means for all parameters found in the dose 0.0025 g L-1 to the cartridge of 290 cm³ and dose 0.0075 g L-1 to the cartridge of 820 cm³. We conclude that the volumes of tubes and hydrogel doses influenced the early growth of seedlings of Parkia mutijulga.