Agronomic benefits of durian shell biochar

N Prakongkep, R J Gilkes, W Wiriyakitnateekul


This study investigated the chemical properties of durian shell biochar which is used as a soil amendment. It can act as a carbon sink and as a means to improve crop yield. Plant nutrient elements in this biochar are in crystalline minerals located within the complex pore structure therefore biochar production from wastes could be a very good way to reduce demand for fertilizers. XRD and SEM-EDS results demonstrate that the numerous minerals in biochar are highly soluble, such as archerite (KH<sub>2</sub>PO<sub>4</sub>), chlorocalcite (KCaCl<sub>3</sub>), kalicinite (KHCO<sub>3</sub>), and sylvite (KCl) with small amounts of poorly soluble minerals (calcite CaCO<sub>3</sub> and struvite KMgPO<sub>4</sub>.6H<sub>2</sub>O). When biochar is applied to soils at the recommended rates of tonnes/ hectare, it will be a significant source of potassium, phosphorus and other nutrient elements. The availability of nutrients to plants will depend on properties of the biochar and the adjacent soil.

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Printed ISSN: 0857-6149

Online ISSN: 2630-0508