Crescimento e desenvolvimento de girassol irrigado com água residuária doméstica e submetido à adubação orgânica.

Abstract

This work aims to evaluate the development of the sunflower irrigated with treated domestic wastewater and well water, together with the nitrogen fertilization available in poultry beds. For this, sunflowers of the EMBRAPA 122 V2000 variety were cultivated in protected environment, where the plants were distributed in a randomized block design in a 5 x 2 factorial scheme, with 3 replicates, totaling 30 experimental units. The treatments consisted of five doses of nitrogen available in the aviary bed (0, 2, 4, 6 and 8 t ha-1) and two qualities of water (A1 - well water and A2 - treated domestic wastewater). The growth variables (plant height, stem diameter and number of leaves), yield (internal and external diameter of the chapters) and the destructive ones (fresh and dry shoot and root phytomass) were evaluated. In summary, irrigation with treated domestic wastewater provided better average results in the development of sunflower, although a significant effect was not always observed. The organic fertilizer from poultry litter and domestic wastewater irrigation untreated, can replace chemical fertilizers in the cultivation of sunflowers variety EMBRAPA 122 V2000.