SILVA, T. T. S.; SILVA, Tainara Tâmara Santiago.
Résumé:
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
