| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 1.97 MB | Adobe PDF |
Authors
Advisor(s)
Abstract(s)
Em consequência das mudanças climáticas e da degradação dos solos, durante a COP21 foi
assinado o Acordo de Paris, em 2015, constituindo acordo juridicamente vinculante. Durante a
COP21 foi lançada a iniciativa 4 por 1000, que visa aumentar o teor atual de carbono do solo em
0,4% por ano, através do uso de práticas sustentáveis de gestão do solo. Deste modo, o presente
estudo tem por objetivo avaliar o efeito da aplicação de diferentes corretivos orgânicos, na
superfície de solos florestais, nas propriedades físicas e químicas do solo como formas alternativas
de gestão direcionadas à Iniciativa 4 por 1000. A área experimental localiza-se em Algoso,
Vimioso, em área da Rede Natura 2000, onde foram instalados, no dia 13/10, sete tratamentos: (1)
RV5 - aplicação de 5 Mg ha-1 de Resíduos Verdes (estilha de matos mediterrâneos); (2) RV10 -
aplicação de 10 Mg ha-1 de Resíduos Verdes (estilha de matos mediterrâneos); (3) CE5 - aplicação
de 5 Mg ha-1 de Composto Estabilizado (produzido numa estação de compostagem localizada no
local); (4) CE10 - aplicação de 10 Mg ha-1 de Composto Estabilizado (produzido numa estação de
compostagem localizada no local); (5) EB5 - aplicação de 5 Mg ha-1 de Estrume de Burro; (6)
EB10 - aplicação de 10 Mg ha-1 de Estrume de Burro e, (7) C – Controlo. Dois meses e nove dias
após a instalação dos tratamentos, foram colhidas amostras de solo perturbadas para propriedades
químicas solo nas profundidades 0-5 cm, 5-10 cm e 10-20 cm para os teores de carbono e azoto
em laboratório e não perturbadas para determinação de propriedades físicas do solo na
profundidade 0-5 cm (permeabilidade, densidade, porosidade, capacidade de campo, capacidade
máxima para a água). Os resultados mostram aumento de 6% e 7% na porosidade total nos
tratamentos EB5 e CE10, respetivamente. Houve também aumento de 6% na microporosidade
nos tratamentos CE10 e EB5. Na estabilidade dos agregados do solo nos tratamentos RV5, RV10
e EB10, apesar de não diferirem do solo original, foram superiores aos demais tratamentos
aplicados. Já as propriedades químicas não apresentaram diferenças estatísticas entre tratamentos
na camada 0-5 cm, apenas na camada 10-20 cm, porém, isto pode ser um efeito do próprio solo,
por causa do curto prazo de ação dos corretivos no solo. Contudo, esta avaliação de curto prazo
ainda não é suficiente para definir qual o melhor corretivo orgânico e qual a melhor gestão deste
no solo, sendo necessário avançar com o estudo do impacto dos corretivos orgânicos na dinâmica
temporal do carbono no solo e nas propriedades físico-químicas do solo.
As a result of climate change and soil degradation, the Paris Agreement was signed during COP21 in 2015, constituting a legally binding agreement. During COP21, the 4 per 1000 initiative was launched, which aims to increase the current soil carbon content by 0.4% per year, through the use of sustainable soil management practices. Thus, the present study aims to evaluate the effect of the application of different organic amendments, on the surface of forest soils, on the physical and chemical properties of the soil as alternative forms of management aimed at the 4 per 1000 Initiative. The experimental area is located in Algoso, Vimioso, in an area of the Natura 2000 Network, where seven treatments were installed on 10/13: (1) RV5 - application of 5 Mg ha-1 of Plant Residues (Mediterranean scrub chips); (2) RV10 - application of 10 Mg ha-1 of Plant Residues (Mediterranean scrub chips); (3) CE5 - application of 5 Mg ha-1 of Stabilized Compost (produced in a composting station located on site); (4) CE10 - application of 10 Mg ha-1 of Stabilized Compost (produced in a composting station located on site); (5) EB5 - application of 5 Mg ha-1 of Donkey Manure; (6) EB10 - application of 10 Mg ha-1 of Donkey Manure and, (7) C – Control. Two months and nine days after the installation of the treatments, soil samples were disturbed for soil chemical variables at depths of 0-5 cm, 5-10 cm and 10-20 cm for carbon and nitrogen contents in the laboratory and undisturbed for determination of soil physical properties at depth 0-5 cm (permeability, density, porosity, field capacity, maximum water capacity). The results show an increase of 6% and 7% in total porosity in treatments EB5 and CE10, respectively. There was also a 6% increase in microporosity in treatments CE10 and EB5. The stability of soil aggregates in treatments RV5, RV10 and EB10, although not different from the original soil, were superior to the other treatments applied. However, the chemical variables did not present statistical differences between treatments in the 0-5 cm layer, only in the 10-20 cm layer. However, this may be an effect of the soil itself, due to the short-term action of the soil amendments. However, this short-term assessment is still not sufficient to define the best organic corrective and its best management in the soil, and it is necessary to advance with the study of the impact of organic correctives on the temporal dynamics of carbon in the soil and on the physical-chemical properties of the soil.
As a result of climate change and soil degradation, the Paris Agreement was signed during COP21 in 2015, constituting a legally binding agreement. During COP21, the 4 per 1000 initiative was launched, which aims to increase the current soil carbon content by 0.4% per year, through the use of sustainable soil management practices. Thus, the present study aims to evaluate the effect of the application of different organic amendments, on the surface of forest soils, on the physical and chemical properties of the soil as alternative forms of management aimed at the 4 per 1000 Initiative. The experimental area is located in Algoso, Vimioso, in an area of the Natura 2000 Network, where seven treatments were installed on 10/13: (1) RV5 - application of 5 Mg ha-1 of Plant Residues (Mediterranean scrub chips); (2) RV10 - application of 10 Mg ha-1 of Plant Residues (Mediterranean scrub chips); (3) CE5 - application of 5 Mg ha-1 of Stabilized Compost (produced in a composting station located on site); (4) CE10 - application of 10 Mg ha-1 of Stabilized Compost (produced in a composting station located on site); (5) EB5 - application of 5 Mg ha-1 of Donkey Manure; (6) EB10 - application of 10 Mg ha-1 of Donkey Manure and, (7) C – Control. Two months and nine days after the installation of the treatments, soil samples were disturbed for soil chemical variables at depths of 0-5 cm, 5-10 cm and 10-20 cm for carbon and nitrogen contents in the laboratory and undisturbed for determination of soil physical properties at depth 0-5 cm (permeability, density, porosity, field capacity, maximum water capacity). The results show an increase of 6% and 7% in total porosity in treatments EB5 and CE10, respectively. There was also a 6% increase in microporosity in treatments CE10 and EB5. The stability of soil aggregates in treatments RV5, RV10 and EB10, although not different from the original soil, were superior to the other treatments applied. However, the chemical variables did not present statistical differences between treatments in the 0-5 cm layer, only in the 10-20 cm layer. However, this may be an effect of the soil itself, due to the short-term action of the soil amendments. However, this short-term assessment is still not sufficient to define the best organic corrective and its best management in the soil, and it is necessary to advance with the study of the impact of organic correctives on the temporal dynamics of carbon in the soil and on the physical-chemical properties of the soil.
Description
Keywords
Propriedades do solo Matéria orgânica Carbono Acordo de Paris