Loading...
Publication
Avaliação do potencial fertilizante de compostos orgânicos obtidos a partir da planta invasora jacinto-de-água
| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 3.02 MB | Adobe PDF |
Advisor(s)
Abstract(s)
O presente trabalho avaliou o processo de compostagem de resíduos agroindustriais,
agropecuários e florestais, incluindo a invasora jacinto-de-água (Eichhornia crassipes
(Mart.) Solms), e aferiu o potencial fertilizante dos compostos orgânicos obtidos. A
compostagem é um processo que permite a reintrodução e valorização dos compostos
orgânicos, através do retorno seguro de nutrientes para o solo e melhoria da sua fertilidade
global. Considerando a necessidade de dar um bom destino aos subprodutos e resíduos,
particularmente à invasora jacinto-de-água, retirada dos nossos cursos de água doce,
pretendeu-se com este estudo a avaliação da eficiência agronómica e a qualidade dos seis
compostos obtidos na cultura de alface (Lactuca sativa L.). Os compostos testados foram
obtidos a partir do jacinto-de-água, bagaço de azeitona, palha de arroz, restos de batata
da indústria, estrume, biomassa florestal fracionada e biochar. Foram conseguidas
misturas equilibradas na razão C/N e humidade que permitiram uma evolução muito
favorável do processo de compostagem. Os resultados demonstraram que a viabilidade
de produção de compostos com elevada qualidade em nutrientes e capacidade corretiva
dos solos a partir do jacinto-de-água é elevada. Dos compostos produzidos, com
características aptas para a Agricultura Biológica, destacou-se particularmente um deles,
pela evidência dos resultados agronómicos observados nos ensaios em vaso
This study evaluated the process of composting agro-industrial, agricultural and forestry waste, including the invasive water hyacinth (Eichhornia crassipes (Mart.) Solms), and assessed the fertilising potential of the organic compounds obtained. Composting is a process that allows organic composts to be reintroduced and valorised, by safely returning nutrients to the soil and improving its overall fertility. Considering the need to give a good destination to by-products and waste, particularly the invasive water hyacinth, removed from our freshwater streams, the aim of this study was to evaluate the efficiency and quality of the six composts obtained, on lettuce crops (Lactuca sativa L.). The compounds tested were obtained from water hyacinth, olive pomace, rice straw, industrial potato waste, manure, fractionated forest biomass and biochar. Balanced mixtures in terms of C/N ratio and humidity were achieved, which allowed the composting process to develop very favourably. The results showed that the feasibility of producing composts with high nutrient quality and soil corrective capacity from water hyacinth is high. Among of the composts produced, with characteristics suitable for organic farming, one particularly stood out due to the evidence of the agronomic results observed in the pot trials
This study evaluated the process of composting agro-industrial, agricultural and forestry waste, including the invasive water hyacinth (Eichhornia crassipes (Mart.) Solms), and assessed the fertilising potential of the organic compounds obtained. Composting is a process that allows organic composts to be reintroduced and valorised, by safely returning nutrients to the soil and improving its overall fertility. Considering the need to give a good destination to by-products and waste, particularly the invasive water hyacinth, removed from our freshwater streams, the aim of this study was to evaluate the efficiency and quality of the six composts obtained, on lettuce crops (Lactuca sativa L.). The compounds tested were obtained from water hyacinth, olive pomace, rice straw, industrial potato waste, manure, fractionated forest biomass and biochar. Balanced mixtures in terms of C/N ratio and humidity were achieved, which allowed the composting process to develop very favourably. The results showed that the feasibility of producing composts with high nutrient quality and soil corrective capacity from water hyacinth is high. Among of the composts produced, with characteristics suitable for organic farming, one particularly stood out due to the evidence of the agronomic results observed in the pot trials
Description
Keywords
Jacinto de água composto