Abstract Previous research showed that adding biochar at the onset of the composting process alleviates this process and reduces emissions. The objective of this study was to evaluate in a field trial whether this compost with biochar applied during the process (i.e., biochar-blended compost) has added value compared to compost or biochar alone on chemical, physical and biological soil properties and crop yield. A single application of biochar, compost and biochar-blended (BB) compost increased the C content of the top soil in the long term, but only compost and biochar-blended compost had a lasting effect on pH and the K content. Two to 4 years after a single application of all three amendments in the field, the soil microbial biomass, richness, diversity and community composition remained unchanged. Due to intensive soil tillage, biochar migrated to subsoil already after 2 growing seasons, thus increasing the C sequestration in subsoil. We conclude that in general, the biochar-blended compost outperformed biochar and had a similar effect as the compost.

中文翻译：

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在提高耕作系统中土壤质量的过程中，使用生物炭堆肥是否比生物炭或堆肥增值？

摘要 先前的研究表明，在堆肥过程开始时添加生物炭可以缓解这一过程并减少排放。本研究的目的是在田间试验中评估在化学、物理和生物土壤特性和作物产量方面，与堆肥或单独使用生物炭相比，在该过程中使用的这种含有生物炭的堆肥（即生物炭混合堆肥）是否具有附加值。从长远来看，单次施用生物炭、堆肥和混合生物炭 (BB) 堆肥会增加表层土壤的 C 含量，但只有堆肥和混合生物炭堆肥对 pH 值和 K 含量有持久影响。在田间单次施用所有三种改良剂后 2 至 4 年，土壤微生物量、丰富度、多样性和群落组成保持不变。由于密集的土壤耕作，biochar 在 2 个生长季节后已经迁移到底土，从而增加了底土中的 C 封存。我们得出的结论是，总的来说，混合生物炭的堆肥优于生物炭，并具有与堆肥相似的效果。