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红壤铁氧化物对有机碳的固定及其对长期施肥的响应

万丹 王伯仁 张璐 张婷 陈玖斌 余光辉 韩亚峰 黄巧云

万丹, 王伯仁, 张璐, 张婷, 陈玖斌, 余光辉, 韩亚峰, 黄巧云. 红壤铁氧化物对有机碳的固定及其对长期施肥的响应[J]. 中国生态农业学报 (中英文), 2022, 30(4): 694−701 doi: 10.12357/cjea.20210705
引用本文: 万丹, 王伯仁, 张璐, 张婷, 陈玖斌, 余光辉, 韩亚峰, 黄巧云. 红壤铁氧化物对有机碳的固定及其对长期施肥的响应[J]. 中国生态农业学报 (中英文), 2022, 30(4): 694−701 doi: 10.12357/cjea.20210705
WAN D, WANG B R, ZHANG L, ZHANG T, CHEN J B, YU G H, HAN Y F, HUANG Q Y. Effect of long-term fertilization on the stabilization of soil organic carbon by iron oxides in red soil[J]. Chinese Journal of Eco-Agriculture, 2022, 30(4): 694−701 doi: 10.12357/cjea.20210705
Citation: WAN D, WANG B R, ZHANG L, ZHANG T, CHEN J B, YU G H, HAN Y F, HUANG Q Y. Effect of long-term fertilization on the stabilization of soil organic carbon by iron oxides in red soil[J]. Chinese Journal of Eco-Agriculture, 2022, 30(4): 694−701 doi: 10.12357/cjea.20210705

红壤铁氧化物对有机碳的固定及其对长期施肥的响应

doi: 10.12357/cjea.20210705
基金项目: 国家自然科学基金项目(41830756)和中国博士后科学基金项目(2019M661028, 2021T140507)资助
详细信息
    作者简介:

    万丹, 主要从事矿物-有机互作界面的重金属和有机碳行为研究。E-mail: wandan@tju.edu.cn

    通讯作者:

    黄巧云, 主要从事土壤化学研究。E-mail: qyhuang@mail.hzau.edu.cn

  • 中图分类号: S153.6

Effect of long-term fertilization on the stabilization of soil organic carbon by iron oxides in red soil

Funds: This study was supported by the National Natural Science Foundation of China (41830756) and China Postdoctoral Science Foundation (2019M661028, 2021T140507).
More Information
  • 摘要: 以湖南衡阳红壤实验站25年长期定位施用化肥和有机肥的红壤为研究对象, 通过焦磷酸钠、盐酸羟胺和连二亚硫酸钠-盐酸溶液分别提取了土壤中络合铁、非晶形铁氧化物和晶形铁氧化物及其结合态有机碳, 借助总有机碳分析和紫外-可见光谱等技术探讨了红壤中不同类型铁氧化物对土壤有机碳固定的贡献及其对长期施肥的响应。结果表明, 红壤中不同类型铁氧化物结合态有机碳的含量为络合铁结合态有机碳(2.45~3.59 g∙kg–1, OCPP)>晶形铁氧化物结合态有机碳(1.46~1.51 g∙kg–1, OCDH)>非晶形铁氧化物结合态有机碳(0.39~0.70 g∙kg–1, OCHH), 其中OCPP主要是络合铁与芳香性弱、疏水性强的大分子有机物通过螯合或者共沉淀作用形成, 而OCHH和OCDH则主要是吸附在(羟基)铁氧化物上的芳香类化合物, OCHH比OCDH具有更大的分子量和更强的芳香性。长期施用化肥(NPK)显著增加(P<0.05)了红壤中OCHH和OCPP的含量, 长期施用有机肥(M)仅促进(P<0.05)非晶形铁氧化物与有机碳结合。NPK处理显著增加(P<0.05)红壤中OCDH的平均分子量以及OCPP的疏水性和芳香性, 而M处理则降低(P<0.05)了OCPP的平均分子量、OCPP和OCHH的疏水性和芳香性。综上所述, NPK和M处理均能提高红壤中铁氧化物的固碳能力, 但对不同类型的铁氧化物影响不一, 此外长期施肥还会改变铁氧化物结合态有机碳的组成。
  • 图  1  长期不同施肥处理对土壤中铁氧化物含量的影响

    CK、NPK、M分别代表对照、长期施用化肥和长期施用有机肥处理, FePP、FeHH、FeDH分别表示络合铁、非晶形铁氧化物和晶形铁氧化物。不同小写字母和大写字母分别表示不同施肥处理和不同铁氧化物类型间差异显著(P<0.05), 误差线表示标准差(n=3)。

    Figure  1.  Contents of iron oxides in red soil under different long-term fertilization treatments

    CK, NPK and M represent no fertilization, chemical fertilizer application, and manure application treatments, respectively. FePP, FeHH, and FeDH represent organo-Fe complexes, amorphous Fe hydroxides, and crystalline Fe hydroxides, respectively. Different lowercase and capital letters on the graph column indicate significant differences among different treatments for the same iron oxide and among different iron oxides for the same treatment, respectively, at P<0.05 according to Tukey’s multiple range test. Error bar represents the standard deviation of n=3.

    图  2  长期不同施肥处理对红壤中铁氧化物结合态有机碳含量的影响

    CK、NPK、M分别代表对照、长期施用化肥和长期施用有机肥处理, OCPP、OCHH、OCDH分别表示络合铁结合态有机碳、非晶形铁氧化物结合态有机碳和晶形铁氧化物结合态有机碳。不同小写字母和大写字母分别表示不同施肥处理和不同铁氧化物结合态有机碳类型间差异显著(P<0.05), 误差线表示标准差(n=3)。

    Figure  2.  Contents of Fe-oxide-bound organic carbon in red soil under different long-term fertilization treatments

    CK, NPK, and M represent no fertilization, chemical fertilizer application, and manure application treatments, respectively. OCPP, OCHH, and OCDH represent organo-Fe complexes bound organic carbon, amorphous Fe hydroxides bound organic carbon, and crystalline Fe hydroxides bound organic carbon, respectively. Different lowercase and capital letters on the graph column indicate significant differences among different treatments for the same Fe-oxide-bound organic carbon and among different Fe-oxide-bound organic carbon for the same treatment, respectively, at P<0.05 according to Tukey’s multiple range test. Error bar represents the standard deviation of n=3.

    图  3  长期不同施肥处理对红壤中铁氧化物结合态有机碳E2/E3比值(a)、A260 (b)和SUVA254 (c)的影响

    Figure  3.  E2/E3 (a), A260 (b), and SUVA254 (c) values of Fe-oxide-bound organic carbon of red soils under different long-term fertilization treatments

    表  1  长期不同施肥处理的红壤pH和总有机碳含量

    Table  1.   pH and organic carbon content in red soil under different long-term fertilization treatments

    处理
    Treatment
    pH有机碳含量
    Organic carbon content (g∙kg−1)
    CK4.85±0.02b7.0±0.1c
    NPK3.77±0.00c9.4±0.2b
    M5.96±0.03a16.5±0.2a
      CK、NPK、M分别代表对照、长期施用化肥和长期施用有机肥处理, 同列不同字母表示不同施肥处理间差异显著(P<0.05)。CK, NPK, and M represent no fertilization, chemical fertilizer application, and manure application treatments, respectively. Values in the same column followed by different letters are significantly different (P<0.05).
    下载: 导出CSV

    表  2  长期不同施肥处理下红壤不同铁氧化物结合态有机碳的碳/铁摩尔比

    Table  2.   C/Fe molar ratios of different Fe-oxide-bound organic carbon under different long-term fertilization treatments

    处理 TreatmentOCPPOCHHOCDH
    CK6.06±0.50bA1.27±0.11cB0.40±0.02aC
    NPK5.75±0.23 bA1.98±0.08aB0.24±0.02cC
    M15.95±1.26 aA1.58±0.05bB0.35±0.01bC
      CK、NPK、M分别代表对照、长期施用化肥和长期施用有机肥处理, OCPP、OCHH、OCDH分别表示络合铁结合态有机碳、非晶形铁氧化物结合态有机碳和晶形铁氧化物结合态有机碳。不同小写字母和大写字母分别表示不同施肥处理和不同铁氧化物结合态有机碳类型间差异显著(P<0.05)。CK, NPK, and M represent no fertilization, chemical fertilizer application, and manure application treatments, respectively. OCPP, OCHH, and OCDH represent organo-Fe complexes bound organic carbon, amorphous Fe hydroxides bound organic carbon, and crystalline Fe hydroxides bound organic carbon, respectively. Different lowercase and capital letters in the table indicate significant differences among different treatments for the same Fe-oxide-bound organic carbon and among different Fe-oxide-bound organic carbon for the same treatment, respectively, at P<0.05 according to Tukey’s multiple range test.
    下载: 导出CSV
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  • 收稿日期:  2021-10-22
  • 录用日期:  2021-12-21
  • 网络出版日期:  2022-02-17
  • 刊出日期:  2022-04-11

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