Utilização agrícola de produtos e sub-produtos resultantes da aquacultura e da vermicompostagem

• Author(s): Menezes, João Filipe Faria
• Date: 2015
• Persistent ID: http://hdl.handle.net/10400.5/9235
• Origin: Repositório da UTL
• Subject(s): wastewater from aquaculture; vermicompost; vermicompost leachates; lettuce
• Document Type: Master thesis
• Language: Portuguese
• Advisor(s): Vasconcelos, Ernesto Pestana; Ribeiro, Henrique Manuel Filipe
• Contributor(s): Repositório da Universidade de Lisboa

Description

Mestrado em Engenharia Agronómica - Instituto Superior de Agronomia

The main objective of the present Master thesis was to estimate the potential replacement of mineral fertilization in lettuce production by application of: 1) wastewater from aquaculture; 2) a mixture of wastewater from aquaculture with vermicompost leachates; and 3) wastewater from aquaculture + vermicompost. To achieve our objectives, three pilot-scale production units were built: an aquaculture unit, a vermicomposting unit and a poultry and rabbit production unit. A pot experiment with lettuce crop was then run to compare the agronomic value of wastewater from aquaculture; a mixture of wastewater from aquaculture with vermicompost leachates and a combined application of wastewater from aquaculture + vermicompost. The results obtained here showed that application of wastewater from aquaculture is a good alternative to replace the mineral nitrogen topdressing of lettuce while application of vermicompost is a good alternative to initial mineral nitrogen applications. Application of the mixture of wastewater from aquaculture with vermicompost leachates can fully supply the nitrogen and potassium requirements of lettuce crop