Condicionamento de um subsolo exposto no cerrado por meio de resíduos e da revegetação

• Ano de defesa: 2015
• Autor(a) principal: Santos, Anderson Secco dos [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Ecologia microbiana; Micorriza; Revegetação; Microbial ecology
• Link de acesso: http://hdl.handle.net/11449/138448; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/15-04-2016/000864109.pdf

To restore in an exposed subsoil, even partially, the dynamics of their attributes in the surface layer and, thus, presents conditions to receive and support the Cerrado vegetation, the use of specific techniques is required. To accelerate this step, an alternative could be the introduction of waste, such as aquatic weeds removed from water reservoirs of hydro power plants, as an organic waste, and ash sugarcane bagasse produced in sugarcane mills, as an agroindustrial waste. Thus, the objective was the conditioning of exposed subsoil in the Cerrado, through organic and inorganic waste addition and revegetation. The focus area has an extension of 10.66 km 2, in continuous area, located on the right bank of the Paraná River and degraded in the 60s during construction of the Ilha Solteira hydroelectric power. It conducted the initial characterization of the area and other evaluations were done after 12 and 24 months of implementation of the experiment. The area was fenced (heavy grade), to break the surface crusting, and scarified, at the average depth of 0.37 m. The area was again barred to break up the clods produced during the subsoil and the incorporation of waste (aquatic weeds and sugarcane ash) happened after them being spread on the subsoil surface. After six months, seedlings of ten Cerrado tree species were introduced randomly, in planting spacing of 4.0 x 5.0 m, totaling 1,080 seedlings. The experimental was a randomized block in a 3 x 4 factorial design, consisting of 3 doses of macrophytes (0, 16 and 32 t ha -1 ) and 4 ash levels (0, 15, 30 and 45 t ha -1 ), a total of 12 treatments, with 03 repetitions, established in plots 20 x 30 m (600 m 2 ), separated by 5 m wide ranges. After 24 months of experiment installation were evaluated: density, macro and microporosity, fertility, height and diameter of the plants, released CO 2 -carbon (CO 2 -C) and number of spores of arbuscular ...