Abstract
The biochar applied to the soil create complex interactions that impact the plant development and soil quality. However, these interactions may vary among different sources to produce the biochar, the soil type, and plant cultivated. Here, we hypothesized that biochar from different sources exhibit different behaviors on different types of topsoil and impact on cassava growth. To test this hypothesis, one field experiment was implemented in a completely randomized design and double factorial scheme (2 x 4), combining two kinds of topsoils (Acrisol or Luvisol), and four sources of biochar: bean husk (BHB), soursop residue (SRB), coffee grounds (CGB) and control (CONT: soil without biochar), with four repetitions. Our analysis revealed that biochar applied to the two topsoil positively affected the cassava growth, such as number of leaves, plant height and fresh mass. The topsoil promoted increases in K+. BBH biochar added to Luvisol topsoil was considerably effective in promote the cassava growth and increase soil quality by increases the soil fertility, improving soil conditioning by increasing K+ levels. Overall, our findings expand our knowledge about biochar applied to topsoil and add important information that can be suitable for future exploration and the development of alternative strategies to waste reuse, increase plant production, and promote soil health. Keywords: biocarbon, soil fertility; soil enzyme, management practices, main component analysis.
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