Crescimento e produtividade da cenoura sob períodos de sombreamento e adubação orgânica.

Abstract

The conventional agricultural model of production is economically the most viable, however, it is mainly responsible for negative impacts on the environment and the individuals that compose it. In this context, the need arises to adopt new techniques that allow comparable production, in such a way that it conserves natural resources and reduces negative impacts on the environment. The objective was to evaluate thegrowth and production of carrots under periods of shading and organic fertilization. The experiment was carried out in the field, at the Experimental Farm, belonging to the Center for Agro-Food Science and Technology (CCTA), at the Federal University of Campina Grande (UFCG), Pombal-PB, from May to August 2022. Theexperimental design was in randomized blocks, with four replications in split plots. The treatments were composed by the combination of two sources of organic fertilization (manure and biofertilizer) and five shading periods (Full sun; 0-90; 0-30; 30-60 and 60-90 days, respectively). Each was composed of 100 plants, 60 of which were useful plants. The use of bovine manure under and shading from 0 to 90 days promotes reduction in the root diameter of carrot cv. Brasília Irecê at 90 days after sowing. Cultivation under shading from 0 to 30 days with the use of manure promotes greater accumulation of fresh root mass of carrot cv. Brasília Irecê, 90 daysafter sowing. Manure and management under full sun conditions promoted the highest accumulation of dry 2 mass of carrot leaves, at 90 days after sowing.