Abstract

Biochar is a carbonic recalcitrant product of biomass which is produced by pyrolysis process. In fact, biochar application has the potential to improve soil properties and crop productivity for long term scenarios compared to many other organic amendments. In this review we have tried to explore the role of biochar in the modification of soil properties (physical, chemical and biological), relevant effects of these changes on crop productivity and its future prospects and challenges by considering the existing literature. Addition of biochar as soil amendment has significantly influenced the soil physical, chemical and biological properties. Biochar application reduces the bulk density of soil, increased microbial activity, pH level and water holding capacity; but it varied according to soil texture. Furthermore, increase in soil porosity and infiltration rate has also been observed due to biochar addition. Simultaneously, biochar addition sometimes could have negative impacts on soil properties that appear in the form of crop productivity loss. This study will provide a clear picture about the role of biochar in modifying soil properties and its beneficial impacts on crop growth and yield.

摘要

生物炭是通过热解过程产生的生物质的碳顽固产物。实际上，与许多其他有机改良剂相比，长期使用生物炭具有改善土壤性质和作物生产力的潜力。在这篇综述中，我们试图通过参考现有文献来探讨生物炭在土壤特性（物理，化学和生物）改性中的作用，这些变化对作物生产力的相关影响及其未来的前景和挑战。添加生物炭作为土壤改良剂已显着影响土壤的物理，化学和生物学特性。生物炭的施用降低了土壤的容重，增加了微生物活性，pH值和保水能力；但它随土壤质地而变化。此外，由于添加了生物炭，还发现了土壤孔隙度和渗透率的增加。同时，添加生物炭有时可能会对土壤特性产生负面影响，并以作物生产力下降的形式出现。这项研究将提供有关生物炭在改变土壤特性中的作用及其对作物生长和产量的有益影响的清晰画面。