Insight in the characteristics of humic substances with cotton straw derived organic materials amendments

IF 4.3 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY BMC Chemistry Pub Date : 2025-02-28 DOI:10.1186/s13065-025-01418-0

Xiangyun Song, Yihe Fan, Jianwei Li, Yan Zhang, Xinwei Liu, Qaiser Hussain, Jinjing Zhang, Dejie Cui

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Abstract

Carbon sequestration by application of organic materials and biochar in soil is an important strategy to increase soil organic carbon (SOC), but the stability of SOC, particularly humic substances (HS) vary with the types of organic material. In this study, cotton straw and its derived compost and biochar were added with equivalent carbon content to soil and incubated for 180 days. The structural characteristics of humic acid (HA), fulvic acid (FA) and humin (Hu) were investigated using solid-state ¹³C nuclear magnetic resonance (NMR) and Fourier transform infrared (FTIR) spectroscopy. The results showed that biochar treatment increased the aryl C of HA, FA, and Hu by 1.38%, 1.68%, and 10.46% compared to straw treatment and increased the aryl C of HA, FA, and Hu by 1.46%, 1.99% and 2.01% compared to compost treatment. The O-alkyl C of HA was 10.59% and 10.65% in high biochar/straw and biochar/compost ratios respectively, while it was 9.81% and 9.61% in low biochar/straw and biochar/compost ratios. In addition, the O-alkyl C of FA was 62.83% and 58.48% in high ratios of biochar/straw and biochar/compost, respectively, while it was 55.85% and 55.94% in low ratios of biochar/straw and biochar/compost. These results suggest that biochar is advantageous for aryl C formation of FA and Hu due to its high aryl C content, whereas straw or compost is advantageous for alkyl C formation of HA. The stability of aryl C and O-alkyl C of HA, FA, and Hu can be improved in soils by incorporating biochar in combination with straw or compost.

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棉花秸秆衍生有机材料改性对腐殖质特性的影响

有机质和生物炭在土壤中的固碳作用是提高土壤有机碳（SOC）的重要手段，但土壤有机碳（SOC）尤其是腐殖质（HS）的稳定性因有机质类型而异。本试验在土壤中添加等量碳的棉花秸秆及其衍生堆肥和生物炭，培养180 d。采用固态13C核磁共振（NMR）和傅里叶变换红外光谱（FTIR）研究了腐植酸（HA）、黄腐酸（FA）和腐植酸（Hu）的结构特征。结果表明：生物炭处理比秸秆处理分别提高了HA、FA和Hu的芳基C 1.38%、1.68%和10.46%，比堆肥处理分别提高了HA、FA和Hu的芳基C 1.46%、1.99%和2.01%。高生物炭/秸秆和低生物炭/秸秆和低生物炭/堆肥下，HA的o -烷基C分别为10.59%和10.65%，低生物炭/秸秆和低生物炭/堆肥下，HA的o -烷基C分别为9.81%和9.61%。此外，在生物炭/秸秆和生物炭/堆肥高配比条件下，FA的o -烷基C分别为62.83%和58.48%，而在生物炭/秸秆和生物炭/堆肥低配比条件下，FA的o -烷基C分别为55.85%和55.94%。综上所述，由于生物炭中芳基C含量较高，有利于FA和Hu的芳基C生成，而秸秆或堆肥有利于HA的烷基C生成。生物炭与秸秆或堆肥配合施用可提高土壤中HA、FA和Hu的芳基C和o -烷基C的稳定性。图形抽象

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来源期刊

BMC Chemistry Chemistry-General Chemistry

CiteScore

5.30

自引率

2.20%

发文量

审稿时长

27 weeks

期刊介绍： BMC Chemistry, formerly known as Chemistry Central Journal, is now part of the BMC series journals family. Chemistry Central Journal has served the chemistry community as a trusted open access resource for more than 10 years – and we are delighted to announce the next step on its journey. In January 2019 the journal has been renamed BMC Chemistry and now strengthens the BMC series footprint in the physical sciences by publishing quality articles and by pushing the boundaries of open chemistry.