Áreas com potenciais para regeneração de atributos do solo no norte maranhense
Ano de defesa: | 2015 |
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Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | |
Tipo de documento: | Tese |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Estadual Paulista (Unesp)
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Programa de Pós-Graduação: |
Não Informado pela instituição
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Departamento: |
Não Informado pela instituição
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País: |
Não Informado pela instituição
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Palavras-chave em Português: | |
Link de acesso: | http://hdl.handle.net/11449/128172 http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/17-09-2015/000848895.pdf |
Resumo: | In the fallow system, the soil is left undisturbed for a very variable period of time so that the pool of soil organic matter recovers and resembles that found in adjacent mature forests. To prove this practice was carried out a survey in the town of Quilombo Damásio, City of Guimaraes, Maranhao State where soil samples were obtained in fallow areas 25, 20, 15, 10, and five years; the current cultivated area (farming) and other primary forest (control) in the layers 0-20 and 20 to 40 cm. The fallow system at both depths and times, showed increases and macronutrient losses. For the statistical analysis we observed significant differences in contributions and loss of nutrients between treatments (fallow times) in both soil depths analyzed. The correlation analysis showed a positive association and negative for respondents macronutrients (P, K+, Ca2+ and Mg2+). Over time the fallow system was efficient in the recovery of natural soil fertility |