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| Brito, L Miguel; Sampaio, Áurea; Pinto, Rui; Mourão, Isabel; Coutinho, João. |
| The influence of organic and phosphate fertilization, and root mycorrhization, in organic lettuce production, was assessed with factorial treatment combinations of: soil type (SOP – soil from organic and SCP – soil from conventional production) and organic fertilizer (0, 2 and 4 t ha-1) in the first trial; mycorrhizal inoculation (mycorrhized and non-mycorrhized plants) and Gafsa phosphate (0, 100 and 200 kg P2O5 ha-1) in the second. Lettuce yield decreased in the SCP with the application of increasing rates of organic fertilizer due to the very high electrical conductivity (50.1 dS m-1) and lack of maturation of this fertilizer. However, the harmful effects of the organic fertilizer were minimized in the SOP. The application of increasing rates of Gafsa... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Composting and manuring; Nutrient turnover; Vegetables; Farm nutrient management. |
| Ano: 2014 |
URL: http://orgprints.org/23031/1/23031%20Brito_MM.pdf |
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| Brito, L Miguel; Reis, Mário; Mourão, Isabel; Coutinho, João. |
| The physical and chemical characteristics of composts of invasive Acacia longifolia and Acacia melanoxylon shrubs were evaluated to identify compost limitations as a substrate component. The bulk density was <0.4 g cm-3 and the total pore space was >85% of the total volume. Air capacity, the easily available water and buffering capacity were also within acceptable recommended values for horticultural substrates. With increased composting time the physical characteristics of the composts improved, but the same was not true for chemical characteristics. It is recommended to use these acacia composts in mixtures with peat which increases the content of organic matter and the C/N ratio, and decreases the pH and the electrical conductivity, of the final... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Composting and manuring; Nutrient turnover; Biodiversity and ecosystem services. |
| Ano: 2014 |
URL: http://orgprints.org/23032/1/23032%20Brito_MM.pdf |
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