Potencial fitorremediador do girassol adubado com resíduo sólido urbano e irrigado com água residuária.

Abstract

Phytoremediation potential of sunflower fertilized with urban solid waste and irrigated with wastewater. Currentlypopulationgrowth, thegenerationof municipal solidwasteandwaterscarcityisincreasingwildly, generating as consequencesof environmental degradation. New waysofreusingsuchwastehavebeenstudied as totheir use in agricultureemerging as analternativenutrientsthattendto maximize thepotentialcrop. Therefore, theaimofthisstudywastoevaluatetheeffectsofirrigationwithtreateddomesticwastewaterand compostedmanureof municipal solidwaste in thegrowthanddevelopmentofsunflowerandthepotential for absorptionof heavy metalsbyculture. The experimentwasconducted in a greenhouseatthe Federal Universityof Campina Grande - PB. The cultureusedwastheSunflower (Helianthusannuus L.), variable EMBRAPA 122 / V2000. Beinggrown in potsfilledwithsoilclassified as eutrophicEntisol. The experimental design was a completelyrandomized design in a factorial 6 x 2, withthreereplications, wheresixlevelsofnitrogenavailable in compoundofsolidresiduewere (0, 60, 100, 140, 180, 220 kg. N. ha- 1) and 2 typesofwater (drinkingwaterandtreateddomesticwastewater). The wastewaterwastreatedby UASB (upflowanaerobicreactor) andthewatersupplywasfromthe municipal supply system. It wasfoundthatthenitrogen rate significantlyinfluencedplantheightvariables, externalinternaldiameterchapterandnumberofpetals. In whatregardsthetypeofwaterused for irrigationobserved no significanteffectonthenumberofleavesandstemdiameter. Sunflowerwas more efficient in theabsorptionofzinc, theothermetalsevaluatedindependentoftheapplied dose ofnitrogen. In general, irrigationwithtreateddomesticwastewaterandfertilizationwithorganiccompostresulted in positive effectsongrowthandsunflowerproduction 122 / V 2000