Produção e qualidade de cenouras e de beterrabas com aplicação de fertilizantes orgânicos

Abstract

It was the objective of the present study to analyze the effects of two types of liquid fertilizers (T 1 = based on bovine manure enriched with MB4, Leguminosae and wood ashes and T = based on the urine of lactating cows) and 6 concentrations (C x

1 = 0, C 2 = 10, C 3 = 20, C = 40 and C 6 = 50 ml L -1 ), in the production and quality of production of carrots and beets. The work was conducted in field conditions, in the period of May to September, at the Escola Agrotécnica de Cajueiro, Campus-IV, from the Universidade Federal da Paraíba UEPB, 2 km away from Catolé do Rocha-PB city seat, which is located in the semiarid region of the Northeast of Brazil, northwest of the state of Paraíba. The experimental delineation used was the blocks by chance, in a factorial scheme 2 x 6, therefore, 12 treatments, with 4 repetitions, in a total of 48 experimental units, containing 40 Brasilia carrot plants and 30 Tall Top Early Wonder beets per parcel. The variables analyzed in the production of carrots and beets were diameter, length and weight of the tuberose roots. The quality of the production of these roots measured through the determination of pH, total soluble solids, total titratable acidity, humidity and total solids. The results of the research show evidence that the types and concentrations of the fertilizers didn t affect in a significant way the production of tuberose roots of carrots and beets, as the quality of the production of carrots and beets was not affected by them, with the exception of the parameter total soluble solids ( o Brix) of beets, being the fertilizer concentration of 16,7 ml L which provided the higher value for total soluble solids for the beets. Fertilizers in concentrations over this value provided reduction of total soluble solids of the tuberose roots of beets. The contents of nitrogen and potassium present in the fertilizers applied may have influenced the results of the variables studied. The quantity of bovine manure applied as base fertilizer had a remarkable influence in the non-significant effects of types and concentrations of fertilizers in the variables studied. Independently from the type of fertilization, pH and total titratable acidity of the tuberose roots of carrots and beets, being intrinsic characteristics of the plant itself, they suffered little influence from the mean.