吉林农业大学学报2024，Vol.46Issue(5)：748-754,7.DOI:10.13327/j.jjlau.2021.0210
玉米秸秆腐化及炭化材料对土壤有机质转化率和胡敏酸结构的影响
Effects of Corn Straw Decay and Carbonized Materials on Soil Or-ganic Matter Conversion Rate and Humic Acid Structure
摘要
Abstract
To screen for organic materials that are more conducive to enhancing the conservation rate of soil organic matter(ESOM)and improving the structural characteristics of humic acid(HA)from corn straw and its decomposed and carbonized materials under the condition of equal carbon input,we calculated the carbon input(12 000 kg/hm2)according to the full amount return method.Four treatments were designed,including no addition of any material(ck),addition of corn straw(CS),ad-dition of decomposed corn straw(HCS),and addition of corn straw-derived biochar(Bc).The struc-tural characteristics of ESOM and HA(element composition,infrared spectrum,thermal stability and fluorescence spectrum)were analyzed.The results show that:after 2 years of organic material appli-cation,the ESOM of HCS was the highest,at 70.6%,which was 50.1%and 10.1%higher than that of CS and Bc treatments,respectively.In the HA structure,the H/C and I2920/1620 of HCS were the lowest,and the ratio of high temperature to medium temperature mass loss was the highest,at 1.01,0.11 and 3.45,respectively,indicating that HCS can improve molecular complexity,condensation degree,and thermal stability of HA.To sum up,compared with CS and Bc treatments,HCS treatment is more helpful to the improvement of ESOM and the stability of HA structure.关键词
玉米秸秆/有机质/转化率/胡敏酸/生物质炭Key words
corn straw/soil organic matter/conversion rate/humic acid/biochar分类
农业科技引用本文复制引用
周健颖,窦森,任超,张一枫..玉米秸秆腐化及炭化材料对土壤有机质转化率和胡敏酸结构的影响[J].吉林农业大学学报,2024,46(5):748-754,7.基金项目
国家自然科学基金项目(42077022),国家重点研发计划项目(2022YFD1500304),吉林省重点研发项目(20200402098NC) （42077022）
