Efeito do fenol sobre o desempenho agronômico da Typha latifólia L.

Abstract

This study was carried out to evaluate the effect from phenol application in macrophytes (Typha latifolia L.), to use in constructed wetlands used to wastewater treatment. Typha was cropped in 15 L pots under greenhouse conditions. The pots were infilled with crushed stone (zero) and nutritious solution of Hoagland modified. The effects were evaluated for the following application doses: 0 (T0), 150 (T1), 300 (T2), 450 (T3) e 600 mg L-1 of phenol (T4). Control pots no planting received 300 mg L-1 of phenol (T5). Weekly, it was made replacement of water evapotranspired (T1, T2, T3 and T4) or evaporated (T5). Phenol concentration increased in nutritious solution in pots of T3, T4, T5 and tendency of stabilization in pots T1 and T2 was verified. The highest yield of dry matter occurred in that treatment T0 and T1. Typha presents increase in take up nitrogen and phosphorus in pots submitted to the solution and larger phenol concentration. However, the smallest biomass production led to a smaller extraction of nutrients in nutritious solution. The results indicated that Typha was able to develop satisfactorily in nutrient solution with concentration of phenol below 150 mg L-1.