Recently, biochar has been widely used for versatile applications in agriculture and environment sectors as an effective tool to minimise waste and to increase the efficiency of circular economy. In the present work, we review the current knowledge about biochar role in N, P and K cycles. Ammonia volatilisation and N2O emission can be reduced by biochar addition. The content of available P can be improved by biochar through enhancement of solubilisation and reduction in P fixation on soil mineral, whilst high extractable K in biochar contributes to K cycle in soil. Liming effect and high CEC are important properties of biochars improving beneficial interactions with N, P and K soil cycle processes. The effectiveness of biochar on N, P and K cycles is associated with biochar properties which are mainly affected by feedstock type and pyrolysis condition.

中文翻译：

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生物炭在促进农业部门循环经济中的作用。第1部分：生物炭在土壤氮，磷和钾循环中的作用综述

近来，生物炭已被广泛用于农业和环境领域的多种用途，作为一种有效的工具，可以最大程度地减少浪费并提高循环经济的效率。在当前的工作中，我们回顾了有关生物炭在N，P和K循环中的作用的当前知识。通过添加生物炭可以减少氨气的挥发和N2O的排放。生物炭可通过增加对土壤矿物质的增溶作用和减少固磷来提高有效磷的含量，而生物炭中可提取的高钾有助于土壤中的钾循环。石灰效应和高CEC是生物炭改善与N，P和K土壤循环过程的有益相互作用的重要特性。生物炭对氮的有效性