Monitorização da solução nutritiva na cultura da roseira em fibra de coco

• Author(s): Matos, Filipe Daniel da Silva
• Date: 2013
• Persistent ID: http://hdl.handle.net/10400.5/6133
• Origin: Repositório da UTL
• Subject(s): cut-roses; fertigation; coconut fibre; nutrient solution; drainage solution; organic substrate
• Document Type: Master thesis
• Language: Portuguese
• Advisor(s): Monteiro, António Almeida; Vasconcelos, Ernesto Pestana
• Contributor(s): Repositório da Universidade de Lisboa

Description

Mestrado em Engenharia Agronómica - Instituto Superior de Agronomia

We studied how fertigation of cut-roses affects coconut fiber over the time roses are installed in this culture medium. Coconut fiber, being an organic substrate, has a cation exchange complex, and is likely to undergo changes in its composition. To this end, samples were taken from the nutrient solution, coconut fiber and the drainage solution, a total of five modalities of a variety and another 2 of other variety for comparison. Later, laboratory analyzes were performed to determine the pH, electrical conductivity and key nutrients of those samples, and analyzes of variance to investigate the differences between modalities. The results of the nutrient solution did not differ between sectors of irrigation, but differed between the collections. The results of coconut fiber and drainage solution were constant showing that the chemical composition increased from the newest to oldest modalities, stabilizing, except some differences in some specific nutrients and the last modality. Therefore we concluded that there is a problem in the formulation of the nutritive solution, and that at the beginning, the substrate competes with the plant nutrients by filling its CEC, and that there were no significant differences between the behaviors of the two varieties