The biochar effect on soil respiration and nitrification

Plant, Soil and Environment

Barbora Šlapáková¹ 

关键词: microbial activity;    mineralization;    soil amendment;    cambisol;   

DOI  :  10.17221/13/2018-PSE

学科分类：农业科学（综合）

来源: Czech Academy of Agricultural Sciences

【 摘 要 】

Soil microorganisms play a main role in the nutrient cycle and they also play an important role in soil health. This article studies the influence of three rates of biochar (0.5, 1 and 3%) in comparison with control (0 biochar) in two different soils (Valečov and Čistá) on soil microbiota activities. The biochar was prepared from 80% of digestate from Zea mays L. and 20% of cellulose fibres by pyrolysis (470°C, 17 min). The biochar ability to influence microbial processes in soil was determined by respiration and nitrification tests. There were no significant differences between basal respiration of control samples and biochar-amended samples. Basal respiration in the Valečov soil reached average amounts from 1.32 to 1.52 mg CO ₂ /h/100 g. In the Čistá soil, basal respiration reached average amounts from 1.40 to 1.49 mg CO ₂ /h/100 g. No significant differences were proved also in nitrification tests of both soils. Nitrifying potential was the highest in 3% rate of biochar amendment. There were no negative changes in the measured soil parameters. CO ₂ efflux was not higher in biochar-amended soil.

【 授权许可】

CC BY