Adubação organomineral no cultivo da beterraba cv Katrina.

Abstract

The beet culture has great economic and food importance in the world, especially with regard to the generation of energy. In Brazil, the culture is still little studied, lacking studies at all stages of crop production, mainly in the management of fertilization. The objective of this work was to evaluate the organomineral fertilization in the cultivation of beet cv. Katrina. The experiment was conducted in field conditions, in the municipality of Pombal, PB, from September to December 2015. The experimental design was a randomized block design with treatments arranged in a 4 x 2 factorial scheme, related to four periods (10, 20, 30 and 40 days) applied in soils with and without mineral fertilization, with four replicates and 16 useful plants per plot. The plants remained in the field for 70 days after transplanting, in beds of 15 cm high, 1 m wide. During this period, growth, gas exchange and production components were evaluated. Fertilization with fermented mineral biofertilizer in the period between 20 and 30 days associated with mineral fertilization provided better performance in growth, gas exchange and beet production. In the treatment without mineral fertilization, it is recommended to use the longer fermentation periods of the biofertilizer, 30 to 40 days, for the beet cultivation.