Changes in organic C stability within soil aggregates under different fertilization patterns in a greenhouse vegetable field
Knowledge of the stability of soil organic C (SOC) is vital for assessing SOC dynamics and cycling in agroecosystems. Studies have documented the regulatory effect of fertilization on SOC stability in bulk soils. However, how fertilization alters organic C stability at the aggregate scale in agroeco...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2021-10-01
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| Series: | Journal of Integrative Agriculture |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095311921636468 |
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| author | Hao-an LUAN Shuo YUAN Wei GAO Ji-wei TANG Ruo-nan LI Huai-zhi ZHANG Shao-wen HUANG |
| author_facet | Hao-an LUAN Shuo YUAN Wei GAO Ji-wei TANG Ruo-nan LI Huai-zhi ZHANG Shao-wen HUANG |
| author_sort | Hao-an LUAN |
| collection | DOAJ |
| description | Knowledge of the stability of soil organic C (SOC) is vital for assessing SOC dynamics and cycling in agroecosystems. Studies have documented the regulatory effect of fertilization on SOC stability in bulk soils. However, how fertilization alters organic C stability at the aggregate scale in agroecosystems remains largely unclear. This study aimed to appraise the changes of organic C stability within soil aggregates after eight years of fertilization (chemical vs. organic fertilization) in a greenhouse vegetable field in Tianjin, China. Changes in the stability of organic C in soil aggregates were evaluated by four methods, i.e., the modified Walkley-Black method (chemical method), 13C NMR spectroscopy (spectroscopic method), extracellular enzyme assay (biological method), and thermogravimetric analysis (thermogravimetric method). The aggregates were isolated and separated by a wet-sieving method into four fractions: large macroaggregates (>2 mm), small macroaggregates (0.25–2 mm), microaggregates (0.053–0.25 mm), and silt/clay fractions (<0.053 mm). The results showed that organic amendments increased the organic C content and reduced the chemical, spectroscopic, thermogravimetric, and biological stability of organic C within soil aggregates relative to chemical fertilization alone. Within soil aggregates, the content of organic C was the highest in microaggregates and decreased in the order microaggregates>macroaggregates>silt/clay fractions. Meanwhile, organic C spectroscopic, thermogravimetric, and biological stability were the highest in silt/clay fractions, followed by macroaggregates and microaggregates. Moreover, the modified Walkley-Black method was not suitable for interpreting organic C stability at the aggregate scale due to the weak correlation between organic C chemical properties and other stability characteristics within the soil aggregates. These findings provide scientific insights at the aggregate scale into the changes of organic C properties under fertilization in greenhouse vegetable fields in China. |
| format | Article |
| id | doaj-art-5a76de373c14410b89f221ccd3dcfe80 |
| institution | Kabale University |
| issn | 2095-3119 |
| language | English |
| publishDate | 2021-10-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Integrative Agriculture |
| spelling | doaj-art-5a76de373c14410b89f221ccd3dcfe802025-08-20T03:56:18ZengKeAi Communications Co., Ltd.Journal of Integrative Agriculture2095-31192021-10-0120102758277110.1016/S2095-3119(21)63646-8Changes in organic C stability within soil aggregates under different fertilization patterns in a greenhouse vegetable fieldHao-an LUAN0Shuo YUAN1Wei GAO2Ji-wei TANG3Ruo-nan LI4Huai-zhi ZHANG5Shao-wen HUANG6Institute of Agricultural Resources and Regional Planning/Key Laboratory of Plant Nutrition and Fertilizer of Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China; College of Forestry, Hebei Agricultural University, Baoding 071000, P.R.ChinaInstitute of Agricultural Resources and Regional Planning/Key Laboratory of Plant Nutrition and Fertilizer of Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.ChinaTianjin Institute of Agricultural Resources and Environment, Tianjin 300192, P.R.ChinaInstitute of Agricultural Resources and Regional Planning/Key Laboratory of Plant Nutrition and Fertilizer of Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China; Correspondence TANG Ji-wei, Tel: +86-10-82105027Institute of Agricultural Resources and Environment, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang 050051, P.R.ChinaInstitute of Agricultural Resources and Regional Planning/Key Laboratory of Plant Nutrition and Fertilizer of Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.ChinaInstitute of Agricultural Resources and Regional Planning/Key Laboratory of Plant Nutrition and Fertilizer of Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China; Correspondence HUANG Shao-wen, Tel: +86-10-82108662Knowledge of the stability of soil organic C (SOC) is vital for assessing SOC dynamics and cycling in agroecosystems. Studies have documented the regulatory effect of fertilization on SOC stability in bulk soils. However, how fertilization alters organic C stability at the aggregate scale in agroecosystems remains largely unclear. This study aimed to appraise the changes of organic C stability within soil aggregates after eight years of fertilization (chemical vs. organic fertilization) in a greenhouse vegetable field in Tianjin, China. Changes in the stability of organic C in soil aggregates were evaluated by four methods, i.e., the modified Walkley-Black method (chemical method), 13C NMR spectroscopy (spectroscopic method), extracellular enzyme assay (biological method), and thermogravimetric analysis (thermogravimetric method). The aggregates were isolated and separated by a wet-sieving method into four fractions: large macroaggregates (>2 mm), small macroaggregates (0.25–2 mm), microaggregates (0.053–0.25 mm), and silt/clay fractions (<0.053 mm). The results showed that organic amendments increased the organic C content and reduced the chemical, spectroscopic, thermogravimetric, and biological stability of organic C within soil aggregates relative to chemical fertilization alone. Within soil aggregates, the content of organic C was the highest in microaggregates and decreased in the order microaggregates>macroaggregates>silt/clay fractions. Meanwhile, organic C spectroscopic, thermogravimetric, and biological stability were the highest in silt/clay fractions, followed by macroaggregates and microaggregates. Moreover, the modified Walkley-Black method was not suitable for interpreting organic C stability at the aggregate scale due to the weak correlation between organic C chemical properties and other stability characteristics within the soil aggregates. These findings provide scientific insights at the aggregate scale into the changes of organic C properties under fertilization in greenhouse vegetable fields in China.http://www.sciencedirect.com/science/article/pii/S2095311921636468fertilizationorganic C stabilitysoil aggregatesthermogravimetric analysis13C NMR spectroscopy |
| spellingShingle | Hao-an LUAN Shuo YUAN Wei GAO Ji-wei TANG Ruo-nan LI Huai-zhi ZHANG Shao-wen HUANG Changes in organic C stability within soil aggregates under different fertilization patterns in a greenhouse vegetable field Journal of Integrative Agriculture fertilization organic C stability soil aggregates thermogravimetric analysis 13C NMR spectroscopy |
| title | Changes in organic C stability within soil aggregates under different fertilization patterns in a greenhouse vegetable field |
| title_full | Changes in organic C stability within soil aggregates under different fertilization patterns in a greenhouse vegetable field |
| title_fullStr | Changes in organic C stability within soil aggregates under different fertilization patterns in a greenhouse vegetable field |
| title_full_unstemmed | Changes in organic C stability within soil aggregates under different fertilization patterns in a greenhouse vegetable field |
| title_short | Changes in organic C stability within soil aggregates under different fertilization patterns in a greenhouse vegetable field |
| title_sort | changes in organic c stability within soil aggregates under different fertilization patterns in a greenhouse vegetable field |
| topic | fertilization organic C stability soil aggregates thermogravimetric analysis 13C NMR spectroscopy |
| url | http://www.sciencedirect.com/science/article/pii/S2095311921636468 |
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