Formerly International Journal of Basic and Applied Agricultural Research

Effect of pyrolysis temperatures on major nutrients and some physical and chemical properties in biochar produced from different biosources

ABHISHEK SAXENA, P.C. SRIVASTAVA, ANAND PATHAK and S.P. PACHAURI
Pantnagar Journal of Research, Volume - 19, Issue - 2 ( May-August, 2021)

Published: 2021-09-01

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Abstract


The effect of different pyrolysis temperatures was examined on the major nutrient composition, nutrient ratios and some physico-chemical properties of biochars produced from pine needles, lantana and wheat straw. An increase in pyrolysis temperature increased the concentrations of C and K in all biochars except in wheat straw biochar wherein a decrease in C was noticed with an increase in pyrolysis temperature from 450 degree C to 550 degree C. Phosphorus concentration in wheat and pine needle biochars increased significantly with the increase in pyrolysis temperature from 300 to 450 degree C and further increase from 450 to 550 degree C decreased P concentration in wheat straw and pine needle biochar but an exactly opposite trend was noted for the C:P ratio. Both the pH and electrical conductivity of biochar increased with increase in pyrolysis temperature, however, increase in temperature from 450 to 550 degree C decreased pH of Lantana biochar and electrical conductivity of lantana and wheat straw biochar. Considering the concentrations of major nutrients and physicochemical properties of plant-based biochar, a pyrolysis temperature of 450 degree C appeared to be optimum for biochar production. Among different feedstocks, biochar produced from pine needles had the highest N content while the one derived from wheat straw had the highest P and K content.


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