Peanut shell and its Biochar Returning to the Field to Enhance the Fertility of Dryland Red Soil

This study aims to investigate the effects of incorporating peanut shells and their biochar on improving the fertility of upland red soil. The research hypothesis is that the addition of peanut shells and their biochar can ameliorate soil acidification, enhance nutrient content, boost microbial activity, thereby optimizing the soil micro-ecological environment and promoting sustainable agricultural development.
S represents the treatment with peanut shell straw, and BC represents the treatment with peanut shell biochar. S1, S2, S3, BC1, BC2, and BC3 denote treatments with different application rates: 3000 kg hm⁻² (S1), 4500 kg hm⁻² (S2), 6000 kg hm⁻² (S3), 1000 kg hm⁻² (BC1), 1500 kg hm⁻² (BC2), and 2000 kg hm⁻² (BC3).
This study provides key scientific evidence for developing strategies to enhance red soil fertility based on straw and biochar incorporation, and offers guidance for regional agricultural practices and waste resource management.