BARROS, H. M. M.; http://lattes.cnpq.br/7955183658651586; BARROS, Helder Morais Mendes.
Resumo:
The sunflower is inserted between the plant species with the greatest potential for
renewable energy production in Brazil, and its wide adaptation to different climatic
conditions, makes it a very promissory culture to the Brazilian Northeast. In this work,
two experiments were conducted, two cycles culture of each experiment. The treatments
in two experiments were arranged in completely randomized block, the first experiment
with a factorial 5 (fertilization doses) x 2 (type of water), with 5 replications, total of 50
experimental units. The second factorial experiment with 4 (doses of fertilization) x 2
(type of water) + 2 (witnesses), with 5 replications, total of 50 experimental units. In the
first experiment, 5 doses of inorganic fertilizer were: 60, 80, 100, 120 and 140% of N
and the second experiment, 4 doses of organic fertilizer were 7.5, 10.0, 12.5 and 15.0%
of dung bovine tanned in basis weight. Were analyzed: %PG, IVE, AP, NF, DC, AF,
Fitomassas, DI, DE, PA, NA, P100, NAV, NANV, TCA, TCR and CAP, where the
results were submitted to analysis of variance and regression, for those who obtained
significant effects. The wastewater was effective for irrigation of sunflower with
inorganic fertilizers, to promote significant increases in relation to the water supply.
Most variables had higher production of sunflower when used with irrigation
wastewater in relation to the water supply. Regarding the average inner and outer
diameter of the chapter assessed on Sunflower, in experiments with inorganic and
organic fertilization results showed the superiority of wastewater compared to water
supply. The sunflower plants showed better results for production variables with water
supply for organic fertilization, except the number of nonviable achene variable. The
dosage that achieved better results was the dung bovine at a dose of 12.5%.