Desempenho agronômico de Mentha aquatica cultivada em sistemas alagados construídos sob diferentes taxas de aplicação orgânica

Abstract

RESUMO:Em vista da escassez de informações sobre o comportamento da espécie Mentha aquatica quando cultivada sob condições de alagamento e altas concentrações orgânicas, objetivou--se avaliar o efeito de diferentes taxas de carregamento orgânico (TCOs) sobre a produtividade e o estado nutricional da espécie cultivada em sistemas alagados construídos (SACs) de escoamento horizontal subsuperficial no tratamento de efluente primário de esgoto sanitário. Dois SACs de 24,0 m x 1,0 m x 0,35 m, preenchidos com brita "zero" até a altura AGRONOMIC PERFORMANCE OF Mentha aquatica CULTIVATED IN CONSTRUCTED WETLANDS SUBJECT TO DIFFERENT ORGANIC LOADING RATESABSTRACT: Taking account to the scarcity of information about the behavior of Mentha aquatica specie when cultivated under waterlogged conditions and high organic concentrations, aimed to evaluate the effect of different organic loading rates (OLR) on productivity and nutritional status of the specie cultivated in constructed wetlands (CWs) of subsurface horizontal flow in the treatment of sewage. Two CWs measuring 24,0 m x 1,0 m x 0,35 m, filled with "zero" crushed stone up to 0,20 m high layer, were planted with the specie. matter yield and to analyze the content of nitrogen, phosphorus, potassium and sodium in the leaves. Although cultivated under waterlogged conditions, the specie showed high productivity. The increased in OLR applied in the systems favored the dry matter production and increased leaf concentration of nitrogen, potassium and sodium.

Response of mint (Mentha spicata L.) crops to chemical and organic fertilization

“…According to Table 5, it is observed that as the amount of chemical fertilizer decreases, the concentration of nutrients in the tissues decreases. Work carried out by Avelar et al (2015) in the Mentha aquatica variety, found this same situation when organic fertilizer increased. The element that presented the highest concentration in the leaves and stems was nitrogen.…”

Extraction Capacity of Grasses Grown in Constructed Wetland Systems Using Different Arrangements and Substrates

“…In recent decades, there has been a growing interest in constructed wetlands (CWs) systems, as they are simple, low cost, and easy to operate and maintain for treating a wide range of wastewater, such as domestic (Avelar et al, 2015), dairy products (Matos et al, 2012;Mendonça et al, 2015), pig farming (Fia et al, 2015), textile industry (Saeed & Sun, 2013), and compounds from pharmaceutical industries (Zhang et al, 2014).…”

Influence of Substrate and Species Arrangement of Cultivated Grasses on the Efficiency of Horizontal Subsurface Flow Constructed Wetlands

“…The Constructed Wetlands Systems (CWS) can be a promising technical alternative, since it is a simple, low cost and easy operation and maintenance technology for the treatment of a wide variety of wastewater, such as domestic (Avelar et al, 2015), of dairy products Mendonça et al, 2015), of swine farming (Sarmento et al, 2012;Fia et al, 2015), of textile industry (Saeed & Sun, 2013) and drugs industry (Zhang et al, 2014).…”