Use of topsoil for restoration of a degraded pasture área

Luise Andrade Amaral, Israel Marinho Pereira, Michele Aparecida Pereira da Silva, Marcio Leles Romarco de Oliveira, Evandro Luiz Mendonça Machado, Marcelo Luiz de Laia
2017 Pesquisa Agropecuária Brasileira  
Abstract: The objective of this work was to evaluate the influence of topsoil thickness, shading and origin when performing environmental restoration in a degraded pasture area. The experiment was conducted in a randomized block design with a factorial (3 x 2 x 2) + 2 layout. Treatments consisted of combinations of topsoil origins (forest at early or middle regeneration stages), topsoil thicknesses (10, 20, or 30-cm superficial soil layer), and presence or absence of 70% shading; with two
more » ... ing; with two additional control treatments. Surveys on topsoil physical-chemical attributes and flora and soil coverage were conducted. Good correlation was observed between bulk density and total porosity. Vegetation comprised a total of 2,932 individuals of herbaceous, shrub and subshrub plants; 33 species in 11 families and 1 morphospecies were identified. A floristic survey of the tree stratum revealed 235 individuals belonging to 21 species and 14 families, as well as 2 unidentified species. The best natural regeneration index is observed in the 20-cm topsoil layer, where shading exerts a positive influence on the humidity and natural regeneration of the seed bank. Topsoil from middle-stage forest is the most suitable for restoration of degraded pasture areas.
doi:10.1590/s0100-204x2017001100014 fatcat:3kjibkefyzbpzhys2rry27qmam