Chemical attributes of soil in agroforestry systems is conditioned by the management system adopted

Abstract

The aim of this study was to evaluate the influence of vegetation management on soil chemical attributes during the implementation of an agroforestry system in Pará, Brazil. Three treatments were evaluated - T1 Control (secondary vegetation - SF), T2 - Fire management system (FMS) and T3 - Management system without vegetation burning (MSWB). Soil samples were collected at 30 cm deep to analyze chemical attributes. The data were analyzed using Analysis of Variance - ANOVA, and the t-test. Treatment T2 caused the most changes in soil chemical attributes on the first analysis showing increased pH, increased levels of N, P, K, Ca, Sum of bases, CEC and percentage of base saturation, and decreased potential acidity of Al in the short term. However, in the second evaluations 48 months later, there was an inversion, in which a reduction of pH, the contents of N, P, K, Ca, Sum of bases and percentage of base saturation, as well as increased potential acidity and of the contents of Al of the soil were observed. For treatments T1 and T3, there were no substantial soil attributes changes during the first and second evaluations. Thus, soil chemical attributes were altered according to the type of management of secondary vegetation and evaluation period during the implementation of Agroforestry Systems.

Cupuassu plant management and the market situation of Itacoatiara, Manacapuru and Presidente Figueiredo counties, Amazonas State, Brazil

“…Other factors, such as cultural practices, flowers pollination and the incidence of pests and diseases can be linked to these results, as discussed further in this work. Nutrients deficiencies are very common, mainly with Mg ( Figure 1A), since farmers do not apply fertilizers in their plantations, and regional Oxisols and Ultisols are low fertile soils (Cochrane et al, 1985, Magalhães et al, 2019, Sousa et al, 2020. Figure 1 also shows a fruit colonized with fruit borer ( Figure 1B), as well as plants with herb of bird ( Figure 1C) and with witches´ broom ( Figure 1D).…”

Viabilidade financeira de sistemas agroflorestais biodiversos no Centro Oeste Brasileiro

“…Estes sistemas fornecem diversos serviços ecossistêmicos como a estabilidade microclimática, ciclagem de nutrientes, diminuição da erosão, redução de salinidade e acidez, diminuição da demanda de insumos externos, melhoramento na infiltração de água no solo, recuperação da fertilidade do solo, aumento da diversidade de inimigos naturais, de polinizadores e da biota do solo; sequestro de carbono na biomassa vegetal; retorno da fauna ao sistema; produção local de grande quantidade de materiais orgânicos, além da capacidade de recompor, a longo prazo, a vegetação nativa por meio de espécies arbóreas e arbustivas (Padovan, 2014;Mosquera-Losada et al, 2016;Torralba et al, 2016;Coelho, 2017;Udawatta et al, 2019;Sousa et al, 2020).…”