Coffee pulp and palm rachis biochar with potential for agricultural dry tropics use
Contextualization: The characterization and analysis of biochar derived from palm rachis and coffee pulp is fundamental to take advantage of organic residues; in addition, adequately, it is transcendental for the development of obtaining promising materials for soil management in the dry tropics. The research was oriented to characterize biochar obtained from coffee pulp and palm rachis biomass, varying the pyrolysis temperature at 250, 300, and 350 °C in a 64-liter muffle furnace.
Knowledge gap: Characterization and analysis studies of biochar in Colombia are scarce, so research is needed to provide information that allows us to understand, optimize its process, management, and use, and take advantage of biochar's potential as a soil improver in the Caribbean region.
- Purpose: The objective was to evaluate lignin, cellulose, and hemicellulose contents and to characterize the biochar obtained (Da, moisture retention, pH, EC, CEC, and nutrient content).
- Methodology: The analysis of lignin, cellulose and hemicellulose contents was carried out in the laboratory of the Colombian Agricultural Research Corporation - AGROSAVIA, and the characterization of the biochar (moisture retention, pH (1: 2) by potentiometry, electrical conductivity (EC) conductivity meter, real density (Dr), total contents of K, Ca, Mg, Na, Fe, Mn, Bo, Cu, Zn and Si by acid digestion and atomic absorption spectrophotometry certified laboratory.
Results and conclusions: It was found that the biochar obtained from the coffee pulp (BPT1, BPT2, and BPT3) is more favorable for agricultural production concerning the parameters evaluated than biochar from palm rachis (BRT1, BRT2, and BRT3). BPT1 presented a difference in its nutritional content; however, it is crucial to emphasize that it is an amendment.
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