山东农业科学2025，Vol.57Issue(10)：109-116,8.DOI:10.14083/j.issn.1001-4942.2025.10.013
钙改性对玉米、花生秸秆生物炭碱性物质的影响
Effects of Calcium Modification on Alkaline Substances of Corn and Peanut Straw Biochar
摘要
Abstract
Calcium-modified biochar was prepared by using corn and peanut straws as raw materials and CaCl2 as modifier.The effects of calcium modification on alkaline substances of the biochar were studied by an-alyzing the characteristics of elemental composition,alkaline substance content and functional group composi-tion.The results showed that the contents of carbon(C),nitrogen(N)and oxygen(O)in calcium-modified biochar decreased by 56.63％to 72.08％,69.50％to 79.28％and 51.78％to 97.15％,respectively(P＜0.05),but the C/N and H/C values increased significantly.The pH value and contents of total calcium,total magnesium,ash and ash alkali of calcium-modified biochar were increased by 4.39％to 8.02％,716.22％to 954.95％,18.66％to 42.26％,78.25％to 269.81％and 7.59％to 30.30％,respectively,compared to the unmodified biochar(P＜0.05).The results of X-ray energy spectrometer(EDS)and X-ray diffractometer(XRD)analyses showed that calcium had been successfully loaded on the modified biochar and new calcium-containing compounds appeared.The result of Fourier transform infrared spectroscopy(FTIR)analysis showed that calcium-modified biochar promoted the formation of aromatic functional groups and hydroxyl functional groups obviously.Correlation analysis showed that pH value was significantly positively correlated with contents of ash,total calcium and ash alkali;ash content was significantly positively correlated with contents of total calcium,total magnesium and ash alkalinity;pH value,ash content,total calcium content and ash alkali con-tent were significantly negatively correlated with C,N and O contents of the biochar.The results of the study indicated that calcium modification could increase the alkaline substance content of biochar by changing its properties,which had good potential for application in amending acidic soils.This conclusion could provide a theoretical basis for the application of calcium-modified biochar in the improvement of acidic soil.关键词
钙改性生物炭/元素组成/碱性物质/灰分含量/傅里叶红外光谱Key words
Calcium-modified biochar/Elemental composition/Alkaline substances/Ash content/Fou-rier transform infrared spectroscopy(FTIR)分类
农业科学引用本文复制引用
朱慧娴,董艳红,赵庆斌,杜海岩,张梦阳,柳新伟,宋祥云,张晓光,李增强..钙改性对玉米、花生秸秆生物炭碱性物质的影响[J].山东农业科学,2025,57(10):109-116,8.基金项目
山东省自然科学基金项目(ZR2023MD037) （ZR2023MD037）
青岛农业大学高层次人才启动基金项目(665/1121014) （665/1121014）
山东省农业科学院农业科技创新工程项目"菜田和果园土壤修复成套技术研究与示范"(2021CXGC010801) （2021CXGC010801）
