DOI: 10.66106/nkyyax.20250205 ISSN: 3081-1384

基于化工改性技术的生物炭肥料优化及其对农田土壤培肥、作物增产的应用研究（Optimization of Biochar Fertilizer Based on Chemical Modification Technology and Its Application on Farmland Soil Fertility Improvement and Crop Yield Increase）

聂佳磊 Jialei Nie
Show PDF Cite
Abstract： Long-term continuous cropping and over-fertilization cause soil degradation and low fertilizer efficiency in China’s farmlands. Raw biochar has blocked pores and weak surface activity, limiting its field effects on soil and crop yield. This study modified straw biochar via acid-base coupling activation and nutrient chelation to produce slow-release biochar fertilizer. Three field treatments (conventional fertilization, raw biochar, reduced fertilization with modified biochar) were carried out on North China fluvo-aquic soil with summer maize to explore the modification mechanism and field performance. Results show the modification unclogs pores and enriches functional groups; its specific surface area, total pore volume and nutrient loading rate rise by 42.35%, 38.62% and 88.67%. The fertilizer cuts soil bulk density, raises organic matter and available nutrients, restores degraded soil and improves maize photosynthesis. It raises yield by 14.77% with 20% less chemical fertilizer, bringing benefits of fertilizer saving, soil improvement, yield growth and ecological restoration. This agrochemical modification system offers theoretical and technical support for farmland protection, fertilizer reduction and low-carbon agriculture.

More from our Archive