Capacidade de suporte da serapilheira da caatinga na recuperação de solos degradados no semiárido

• Ano de defesa: 2014
• Autor(a) principal: Salgado, Eveline Viana
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Palavras-chave em Português: Biomassa em regiões semiáridas; Sustentabilidade em ambientes florestais; Serapilheira no bioma caatinga; Revitalização de áreas degradadas
• Link de acesso: http://www.repositorio.ufc.br/handle/riufc/10580

The development of exploratory techniques that respect the limitations edaphoclimatic through managements conservation of natural soil-water-plant is now the object of study in different fields of knowledge. The objective of this investigation was to define a model of recovery of degraded areas in the Brazilian semiarid region by the use of litter produced by the Caatinga biome, but also assess changes in attributes biological, chemical and physical soil occurred in the soil occurred in the areas of removal and disposal of litter. Besides investigating the dynamics of rainfall in the production and decomposition rate of litter in the Caatinga biome. This study was conducted in the municipality of General Sampaio, Ceará, Brazil. Comprised of two experimental areas, near and distinct, area 1-PRNP Elias Andrade and area 2-degraded soil. Treatments were defined by percentage of soil cover with litter, which are: 0, 20, 40, 60, 80 and 100% coverage, which corresponds to 0, 17, 34, 50, 67 and 83kg, respectively, in plots of 25 m2. In each study area applied six treatments with four replications, with random block design with split plots (area 1) and random block design with split plots (area 2), the soil layers 0-5, 5-10 and 5-20cm. We evaluated the annual litter production corresponding to the years 2009/2010, as well as the spatial and temporal dynamics of some soil attributes: biological attributes (RBS, CBM and qCO2), chemical (Ca, Mg, Na, K, MO, P) and physical (bulk density, moisture content, porosity, macropores and micropores) in disturbed and undisturbed samples (composite). Observed in this investigation that productivity monthly litter in semiarid regions is inversely correlated with rainfall. As well, the study time was considered short when referring to the evolutionary process of the soil properties. What we could see some treds were attributes related directly to edaphoclimatic factors.