- ISSN 1008-505X
- CN 11-3996/S
| Citation: |
LI Bing-jie, GAO Ju-sheng, DUAN Ying-hua, HUANG Jing. Distribution and properties of iron-bound organic carbon of aggregates in paddy soil under long-term straw incorporation[J]. Journal of Plant Nutrition and Fertilizers, 2025, 31(4): 621-630. DOI: 10.11674/zwyf.2024454
|
Iron oxides in soil facilitate organic carbon sequestration through adsorption or coprecipitation and serve as critical cementing agents in aggregate formation. This study investigated the effects of carbon input on the content and stability of iron oxide-associated organic carbon within soil aggregates, in order to gain a deeper understanding of the soil organic carbon sequestration mechanism in paddy fields.
Based on the long-term positioning experiment of double-cropping rice in Qiyang Red Soil Experimental Station in Hunan Province, undisturbed soil samples were collected in treatment plots of the CK (no straw return), RS1 (only returning early rice straw to field), and RS2 (returning both early and late rice straw to field) continuously for 11 years. The dry-wet sieve method was used to separate soil aggregates into macro- aggregate (>2 mm), small- aggregate (0.25−2 mm), micro- aggregate (0.053−0.25 mm), and clay-silt particle (<0.053 mm). Organic carbon content and iron-bound organic carbon (OCFe) were analyzed across aggregates. OCFe was further partitioned into three fractions: complexed iron-bound organic carbon (OCPP), amorphous iron oxide-bound organic carbon (OCHH), and crystalline iron oxide-bound organic carbon (OCDH). Their proportions in OCFe and aromaticity were quantified.
The proportions of OCPP, OCHH and OCDH in each particle size aggregate were 16.0%−22.4%, 1.6%−3.0%, and 0.5%−1.8%, respectively, indicating that the iron-bound organic carbon in the aggregate is mainly OCPP. Compared to CK, RS1 and RS2 increased OCFe content in macro-aggregates by 21.3% and 36.2%, respectively. RS1 significantly enhanced OCFe in micro-aggregates but reduced it in clay-silt particles. Both RS1 and RS2 elevated OCPP in macro-aggregates and OCDH in clay-silt particles, with linear correlations between these two forms of iron-bound organic carbon fractions and aggregate soil organic C (SOC) content, suggesting straw return altered iron-bound organic carbon distribution. Additionally, straw returning increased the aromaticity of OCHH in small-aggregates and OCDH in clay-silt particles.
Straw returning promotes the accumulation of OCPP in macro-aggregates and OCDH in micro-aggregates and clay-silt particles, while enhancing the aromaticity of OCDH in clay-silt fractions. These shifts in iron-bound organic carbon fractions and their stabilization within aggregates likely contribute to increased soil organic carbon sequestration under straw returning, highlighting a key mechanism for SOC preservation in paddy soils.
| [1] |
Lal R. Soil carbon sequestration impacts on global climate change and food security[J]. Science, 2004, 304: 1623−1627. DOI: 10.1126/science.1097396
|
| [2] |
Schmidt M W I, Torn M S, Abiven S, et al. Persistence of soil organic matter as an ecosystem property[J]. Nature, 2011, 478: 49−56.
|
| [3] |
闫桂菀, 董文斌, 李忠义, 等. 绿肥覆盖对果园土壤团聚体及有机碳组分的影响[J]. 应用生态学报, 2024, 35(12): 3427−3434.
Yan G W, Dong W B, Li Z Y, et al. Effects of green manure mulching on soil aggregates and organic carbon fractions in orchards[J]. Chinese Journal of Applied Ecology, 2024, 35(12): 3427−3434.
|
| [4] |
Jastrow J D. Soil aggregate formation and the accrual of particulate and mineral-associated organic matter[J]. Soil Biology and Biochemistry, 1996, 28(4−5): 665−676.
|
| [5] |
Chen C, Dynes J J, Wang J, et al. Properties of Fe-organic matter associations via coprecipitation versus adsorption[J]. Environmental Science & Technology, 2014, 48(23): 13751−13759.
|
| [6] |
Kramer M G, Chadwick O A. Climate-driven thresholds in reactive mineral retention of soil carbon at the global scale[J]. Nature Climate Change, 2018, 8(12): 1104−1108.
|
| [7] |
Huang X L, Tang H Y, Kang W J, et al. Redox interface-associated organo-mineral interactions: A mechanism for C sequestration under a rice-wheat cropping system[J]. Soil Biology and Biochemistry, 2018, 12012-23.
|
| [8] |
Amin M N, Hossain M S, de Bruyn L L, et al. A systematic review of soil carbon management in Australia and the need for a social-ecological systems framework[J]. Science of the Total Environment, 2020, 719: 135182.
|
| [9] |
Balasubramanian D, Zhou W J, Ji H L, et al. Environmental and management controls of soil carbon storage in grasslands of southwestern China[J]. Journal of Environmental Management, 2020, 254: 109810.
|
| [10] |
Tian Y, Lu S. Amorphous iron oxides protect aggregate-associated organic carbon from microbial utilization and decomposition evidenced from the natural abundance of 13C[J]. Soil and Tillage Research, 2023, 227: 105623.
|
| [11] |
张杰. 铁氧化物对土壤有机碳稳定和团聚体铁碳结合的影响[D]. 浙江: 浙江大学硕士学位论文, 2021.
Zhang J. Effect of iron oxides on soil organic carbon stability and iron-carbon binding in aggregate[D]. Zhejiang: MS Thesis of Zhejiang University, 2021.
|
| [12] |
Li S, Zhang S, Pu Y, et al. Dynamics of soil labile organic carbon fractions and C-cycle enzyme activities under straw mulch in Chengdu Plain[J]. Soil and Tillage Research, 2016, 155: 289−297.
|
| [13] |
黄璐, 赵国慧, 李廷亮, 等. 秸秆还田对黄土旱塬麦田土壤团聚体有机碳组分的影响[J]. 农业工程学报, 2022, 38(13): 123−132. DOI: 10.11975/j.issn.1002-6819.2022.13.014
Huang L, Zhao G H, Li T L, et al. Effects of straw returning on the organic carbon components of soil aggregates in wheat fields on the loess plateau[J]. Transactions of the Chinese Society of Agricultural Engineering, 2022, 38(13): 123−132. DOI: 10.11975/j.issn.1002-6819.2022.13.014
|
| [14] |
黄圣杰, 陈俊朴, 陈涛, 等. 不同覆盖模式对樱桃园土壤团聚体及碳氮的影响[J]. 水土保持研究, 2022, 29(1): 44−50. DOI: 10.3969/j.issn.1005-3409.2022.1.stbcyj202201007
Huang S J, Chen J P, Chen T, et al. Effects of different coverage modes on aggregates and carbon and nitrogen of soil in cherry orchard[J]. Research of Soil and Water Conservation, 2022, 29(1): 44−50. DOI: 10.3969/j.issn.1005-3409.2022.1.stbcyj202201007
|
| [15] |
Xue B, Huang L, Huang Y N, et al. Effects of organic carbon and iron oxides on soil aggregate stability under different tillage systems in a rice-rape cropping system[J]. Catena, 2019, 177: 1−12.
|
| [16] |
Xue B, Huang L, Huang Y N, et al. Straw management influences the stabilization of organic carbon by Fe (oxyhydr) oxides in soil aggregates[J]. Geoderma, 2020, 358: 113987.
|
| [17] |
甘雅芬, 徐永昊, 周富忠, 等. 紫云英还田与氮肥减施对水稻土团聚体中各形态铁锰含量的影响[J]. 植物营养与肥料学报, 2022, 28(7): 1238−1248. DOI: 10.11674/zwyf.2021535
Gan Y F, Xu Y H, Zhou F Z, et al. Effects of Chinese milk vetch incorporation and nitrogen reduction on different forms of Fe and Mn in aggregates of paddy soil[J]. Journal of Plant Nutrition and Fertilizers, 2022, 28(7): 1238−1248. DOI: 10.11674/zwyf.2021535
|
| [18] |
吴嘉俊, 童文彬, 江建锋, 等. 水稻秸秆炭施用对水稻土团聚体稳定性及其碳氮分布的影响[J]. 植物营养与肥料学报, 2024, 30(3): 457−468. DOI: 10.11674/zwyf.2023432
Wu J J, Tong W B, Jiang J F, et al. Application of rice straw biochar increases soil aggregate stability and carbon and nitrogen distribution in paddy soil[J]. Journal of Plant Nutrition and Fertilizers, 2024, 30(3): 457−468. DOI: 10.11674/zwyf.2023432
|
| [19] |
段勋. 赤铁矿和褐煤添加对湿地土壤碳汇及细菌群落结构的影响[D]. 吉林长春: 中国科学院大学硕士学位论文, 2021.
Duan X. Effect of wetlands soil organic carbon sink and bacterial community structure respond to hematite and lignite addition[D]. Changchun, Jilin: MS Thesis of University of Chinese Academy of Sciences, 2021.
|
| [20] |
Coward E K, Thompson A T, Plante A F. Iron-mediated mineralogical control of organic matter accumulation in tropical soils[J]. Geoderma, 2017, 306: 206−216.
|
| [21] |
万丹, 王伯仁, 张璐, 等. 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.
Wan D, Wang B R, Zhang L, et al. 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.
|
| [22] |
陈琦, 李富翠, 彭钰梅, 等. 青藏公路对沿线草地生态系统土壤可溶性有机碳及其特征的影响[J]. 草地学报, 2022, 30(8): 2158−2166.
Chen Q, Li F C, Peng Y M et al. Effects of Qinghai-Tibet highway on soil dissolved organic carbon content and characteristics in grassland ecosystems along the route[J]. Acta Agrestia Sinica, 2022, 30(8): 2158−2166.
|
| [23] |
Sokolova T A. Low-molecular-weight organic acids in soils: Sources, composition, concentrations, and functions: A review[J]. Eurasian Soil Science, 2020, 53: 580−594. DOI: 10.1134/S1064229320050154
|
| [24] |
Chen C, Hall S J, Coward E, Thompson A. Iron-mediated organic matter decomposition in humid soils can counteract protection[J]. Nature Communications. 2020, 11(1), 2255.
|
| [25] |
Song X, Wang P, Van Zwieten L, et al. Towards a better understanding of the role of Fe cycling in soil for carbon stabilization and degradation[J]. Carbon Research, 2022, 1: 5. DOI: 10.1007/s44246-022-00008-2
|
| [26] |
Wagai R, Mayer L M, Kitayama K, et al. Association of organic matter with iron and aluminum across a range of soils determined via selective dissolution techniques coupled with dissolved nitrogen analysis[J]. Biogeochemistry, 2013, 112: 95−109. DOI: 10.1007/s10533-011-9652-5
|
| [27] |
Diba F, Shimizu M, Hatano R. Effects of soil aggregate size, moisture content and fertilizer management on nitrous oxide production in a volcanic ash soil[J]. Soil Science and Plant Nutrition, 2011, 57(5): 733−747. DOI: 10.1080/00380768.2011.604767
|
| [28] |
Bai J, Zong M, Li S, et al. Nitrogen, water content, phosphorus and active iron jointly regulate soil organic carbon in tropical acid red soil forest[J]. European Journal of Soil Science, 2021, 72(1): 446−459. DOI: 10.1111/ejss.12966
|
| [29] |
宋旭昕, 刘同旭. 土壤铁矿物形态转化影响有机碳固定研究进展[J]. 生态学报, 2021, 41(20): 7928− 7938.
Song X X, Liu T X. Effects of soil iron mineral transformation on organic carbon sequestration: A review[J]. Acta Ecologica Sinica, 2021, 41(20): 7928− 7938.
|
| [30] |
Coward E K, Ohno T, Plante A F. Adsorption and molecular fractionation of dissolved organic matter on iron-bearing mineral matrices of varying crystallinity[J]. Environmental Science & Technology, 2018, 52(3): 1036−1044.
|
| [31] |
宋佳, 黄晶, 高菊生, 等. 冬种绿肥和秸秆还田对双季稻区土壤团聚体和有机质官能团的影响[J]. 应用生态学报, 2021, 32(2): 564−570.
Song J, Huang J, Gao J S, et al. Effects of green manure planted in winter and straw returning on soil aggregates and organic matter functional groups in double cropping rice area[J]. Chinese Journal of Applied Ecology, 2021, 32(2): 564−570.
|
| [32] |
Dick D P, Gonçalves C N, Dalmolin R S D, et al. Characteristics of soil organic matter of different Brazilian Ferralsols under native vegetation as a function of soil depth[J]. Geoderma, 2005, 124(3−4): 319−333.
|
| [33] |
段勋, 李哲, 刘淼, 等. 铁介导的土壤有机碳固持和矿化研究进展[J]. 地球科学进展, 2022, 37(2): 202−211. DOI: 10.11867/j.issn.1001-8166.2021.114
Duan X, Li Z, Liu M, et al. Progress of the iron-mediated soil organic carbon preservation and mineralization[J]. Advances in Earth Science, 2022, 37(2): 202−211. DOI: 10.11867/j.issn.1001-8166.2021.114
|
| [34] |
Rabbi S M F, Wilson B R, Lockwood P V, et al. Aggregate hierarchy and carbon mineralization in two Oxisols of New South Wales, Australia[J]. Soil and Tillage Research, 2015, 146: 193−203. DOI: 10.1016/j.still.2014.10.008
|
| [35] |
李娜, 韩晓增, 尤孟阳, 等. 土壤团聚体与微生物相互作用研究[J]. 生态环境学报, 2013, 22(9): 1625−1632.
Li N, Han X Z, You M Y, et al. Research review on soil aggregates and microbes[J], Ecology and Environmental Sciences, 2013, 22(9): 1625−1632.
|
| [36] |
毛霞丽. 亚热带不同母质发育土壤有机碳的积累特征及其稳定机理研究[D]. 浙江杭州: 浙江大学博士学位论文, 2020.
Mao X L. Accumulation characterisitcs and stabilization mechanisms of organic carbon in soils developed from different parent materials in subtropical regions[D]. Hangzhou, Zhejiang: PhD Dissertation of Zhejiang University, 2020.
|
DownLoad: