Contribuição da calagem e adubação fosfatada na transição de cafezais para sistema agroflorestal no município de Apuí, Amazonas.
The adoption of appropriate practices for production in agroforestry systems can provide benefits for the agriculture in the Amazon region. In Apuí, southeastern of Amazonas state, a group of farmers start up a transition process with the coffee crop for establish agroforestry systems. Slightly shad...
| Autor principal: | Figueiredo, Vinícius Gozzo de |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/5338 http://lattes.cnpq.br/0166590685021322 |
| Resumo: |
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The adoption of appropriate practices for production in agroforestry systems can provide benefits for the agriculture in the Amazon region. In Apuí, southeastern of Amazonas state, a group of farmers start up a transition process with the coffee crop for establish agroforestry systems. Slightly shaded coffee plantations were enriched with tree species and some management practices were established. Liming the soil and phosphorus fertilization were applied in order to reduce soil acidity and amend deficiencies in phosphorus availability to plants. These characteristics are commonly found in Latosols on Brazilian Amazon upland areas and it causes difficulties on the maintenance of perennial crops productivity. This study evaluated the effects of liming practices in three dosages (0.3, 1, 2.8 t.ha-1) and phosphorus fertilization per coffee plants with 50 grams of triple superphosphate. 14 coffee plantation soils located in 8 farms were analyzed, 8 crops with management practices and 6 crops without management. The phosphorus fertilization was efficient to increase the P available content in relation to areas without management while associated to liming recommended dosage (2.5 to 2.8 t.ha-1.). This increase was 2.43 mg.kg-1, bringing the P content available to 5.74 mg.kg-1. The liming at the recommended dosage had the most significant increase in Ca and Mg in relation to the partial (1 t.ha-1) and minimum (0.3 t.ha-1) dosages. The base saturation increased on average from 29% to 54% in managed coffee plantations and there was no significant difference between the recommended and partial liming. The soil pH increased on average from 4.14 to 4.66 in management areas, while considering only the recommended and partial liming this increasing in pH was 4.71. The exchangeable acidity (H + Al) was also reduced in soils with management and showed a significant difference only between the recommended and minimum liming. From 1 t.ha-1 liming contributed to improve the soil attributes related to acidity and base saturation. |