Produção de girassol irrigado com água residuária e adubação orgânica.

Abstract

Due to the low pluviometric indexes in the Northeast region, the use of water reuse has been conquering space for the development of agriculture. The present study proposes to evaluate the irrigation of the girassol EMBRAPA 122 with treated domestic wastewater and artesian along the fertilization available in poultry litter. For both, the sunflower plants were grown in pots in a protected environment distributed in a completely randomized experimental design in factorial 5 x 2, with 3 replications, totaling 30 experimental units. The factors that consisted of five doses of poultry litter (0, 2, 4, 6 and 8 t ha-1) and two qualities of water for irrigation (A1 - Water artesian well and A2 - domestic wastewater treated). During the cultivation of the plants were made ratings of chlorophyll content, length of roots, fresh and dry mass of roots, number and mass of floral buds closed and opened, outer and inner diameter of flowers and the number of petals. According to the results obtained, irrigation with wastewater treated contributed positively in the obtaining of sunflower plants with satisfactory yield. In addition, poultry litter is presented as an alternative to replacing the mineral nitrogen to the cultivation of sunflower.