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  • characteristics and nutrient values of biochars produced from giant reed at different temperatures

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 855
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     to investigate the effect of pyrolysis temperature on properties and nutrient values, biochars were produced from giant reed (arundo donax l.) at 300–600 °c and their properties such as elemental and mineral compositions, release of n, p and k, and adsorption of n and p were determined. with increasing temperatures, more n was lost and residual n was transformed into heterocyclic-n, whereas no p and k losses were observed. p was transformed to less soluble minerals, resulting in a reduction in available- p in high-temperature biochars. a ph of ≤5 favored release of nh+4 , po3-4 and k+ into water. low-temperature biochars (≤ 400 °c) showed appreciable nh+4 adsorption (2102 mg kg-1). these results indicate that low-temperatures may be optimal for producing biochar from giant reed to improve the nutrient availability.

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