The use of wastewater in agricultural production promotes the sustainability of the irrigated agriculture, saving non polluted surface waters maintaining the environmental quality and serving as a source of nutrients for plants. In this manner, an experiment was conducted under greenhouse conditions, at the UFCG, to study the production of the sunflower irrigated with domestic effluent and different levels of organic manure from July to October 2008. A randomized block design was used, with 5 levels of water necessity of the crop: 40, 60, 80, 100 and 120% determined by water balance study and 4 doses of organic manuring (control - 0, 0.7, 1.4 and 2.1% on weight bans) arranged in 5 x 4 factorial design, with 3 repetitions. The organic manure until the dose of 1.4% reduced the number of days for blooming of the sunflower (IF) and with 1.5% promoted maximum plant height. With the exception of IF the levels of water reposition favored the height of plant, dry weight of the aerial part, diameter of external and internal capitulum, fresh phytomass of the capitulum, number of achenes and dry weight of achenes per plant, the highest being observed with 120% replacement level. The wastewater is a potentially viable source of water supplement for sunflower, cv. Embrapa 122/V-2000.
Helianthus annuus L.; wastewater; productivity
