Chemical and Biological Amendments and Crop Rotation Affect Soil Carbon and Nitrogen Sequestration by Influencing the Carbon and Nitrogen Contents of Soil Aggregates
Soil organic carbon (SOC) and total nitrogen (TN) sequestration are vital for maintaining soil fertility and mitigating climate change. This study aimed to evaluate the effects of different amendments (chemical and biological) and crop rotations on SOC, TN sequestration, and soil aggregate distribut...
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MDPI AG
2025-05-01
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| Series: | Agriculture |
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| author | Zefang Zhu Shuangting Li Kangbo Xu Jing Wang Jinfeng Yang Xiaori Han |
| author_facet | Zefang Zhu Shuangting Li Kangbo Xu Jing Wang Jinfeng Yang Xiaori Han |
| author_sort | Zefang Zhu |
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| description | Soil organic carbon (SOC) and total nitrogen (TN) sequestration are vital for maintaining soil fertility and mitigating climate change. This study aimed to evaluate the effects of different amendments (chemical and biological) and crop rotations on SOC, TN sequestration, and soil aggregate distribution. A six-year field study was conducted, involving five different treatments: a monoculture of peanut (PC), a monoculture of maize (MC), a maize-peanut rotation (M-PR), and peanut continuous cropping with chemical (PCCA) and biological (PCBA) amendments. Soil properties, aggregate size distribution, SOC, TN, and enzyme activities were measured. The results show that the bulk density increased, while the field water−holding capacity and porosity decreased with depth. M-PR had the highest macroaggregate (>0.25 mm) proportion, increasing by 21.6–50.8%. SOC and TN increased with aggregate size and were 23.9–103.6% and 7.0–82.9% higher, than PC and MC, respectively, under the treatments. PCCA showed the highest SOC, TN, and enzyme activities. Structural equation modeling indicated that the C and N contents of aggregates directly influenced SOC and TN sequestration. In conclusion, crop rotation and amendments, especially PCCA, effectively improve soil C and N sequestration, and enhance the soil structure, thereby reducing degradation risks, and potentially decreasing on−farm greenhouse gas emissions. |
| format | Article |
| id | doaj-art-bbd2aa2aa8bb4b939a12a305dd91f533 |
| institution | OA Journals |
| issn | 2077-0472 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
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| series | Agriculture |
| spelling | doaj-art-bbd2aa2aa8bb4b939a12a305dd91f5332025-08-20T02:33:36ZengMDPI AGAgriculture2077-04722025-05-011510105110.3390/agriculture15101051Chemical and Biological Amendments and Crop Rotation Affect Soil Carbon and Nitrogen Sequestration by Influencing the Carbon and Nitrogen Contents of Soil AggregatesZefang Zhu0Shuangting Li1Kangbo Xu2Jing Wang3Jinfeng Yang4Xiaori Han5College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, ChinaCollege of Land and Environment, Shenyang Agricultural University, Shenyang 110866, ChinaCollege of Land and Environment, Shenyang Agricultural University, Shenyang 110866, ChinaCollege of Land and Environment, Shenyang Agricultural University, Shenyang 110866, ChinaCollege of Land and Environment, Shenyang Agricultural University, Shenyang 110866, ChinaCollege of Land and Environment, Shenyang Agricultural University, Shenyang 110866, ChinaSoil organic carbon (SOC) and total nitrogen (TN) sequestration are vital for maintaining soil fertility and mitigating climate change. This study aimed to evaluate the effects of different amendments (chemical and biological) and crop rotations on SOC, TN sequestration, and soil aggregate distribution. A six-year field study was conducted, involving five different treatments: a monoculture of peanut (PC), a monoculture of maize (MC), a maize-peanut rotation (M-PR), and peanut continuous cropping with chemical (PCCA) and biological (PCBA) amendments. Soil properties, aggregate size distribution, SOC, TN, and enzyme activities were measured. The results show that the bulk density increased, while the field water−holding capacity and porosity decreased with depth. M-PR had the highest macroaggregate (>0.25 mm) proportion, increasing by 21.6–50.8%. SOC and TN increased with aggregate size and were 23.9–103.6% and 7.0–82.9% higher, than PC and MC, respectively, under the treatments. PCCA showed the highest SOC, TN, and enzyme activities. Structural equation modeling indicated that the C and N contents of aggregates directly influenced SOC and TN sequestration. In conclusion, crop rotation and amendments, especially PCCA, effectively improve soil C and N sequestration, and enhance the soil structure, thereby reducing degradation risks, and potentially decreasing on−farm greenhouse gas emissions.https://www.mdpi.com/2077-0472/15/10/1051amendmentcrop rotationsoil aggregatessoil C-N sequestrationenzyme activity |
| spellingShingle | Zefang Zhu Shuangting Li Kangbo Xu Jing Wang Jinfeng Yang Xiaori Han Chemical and Biological Amendments and Crop Rotation Affect Soil Carbon and Nitrogen Sequestration by Influencing the Carbon and Nitrogen Contents of Soil Aggregates Agriculture amendment crop rotation soil aggregates soil C-N sequestration enzyme activity |
| title | Chemical and Biological Amendments and Crop Rotation Affect Soil Carbon and Nitrogen Sequestration by Influencing the Carbon and Nitrogen Contents of Soil Aggregates |
| title_full | Chemical and Biological Amendments and Crop Rotation Affect Soil Carbon and Nitrogen Sequestration by Influencing the Carbon and Nitrogen Contents of Soil Aggregates |
| title_fullStr | Chemical and Biological Amendments and Crop Rotation Affect Soil Carbon and Nitrogen Sequestration by Influencing the Carbon and Nitrogen Contents of Soil Aggregates |
| title_full_unstemmed | Chemical and Biological Amendments and Crop Rotation Affect Soil Carbon and Nitrogen Sequestration by Influencing the Carbon and Nitrogen Contents of Soil Aggregates |
| title_short | Chemical and Biological Amendments and Crop Rotation Affect Soil Carbon and Nitrogen Sequestration by Influencing the Carbon and Nitrogen Contents of Soil Aggregates |
| title_sort | chemical and biological amendments and crop rotation affect soil carbon and nitrogen sequestration by influencing the carbon and nitrogen contents of soil aggregates |
| topic | amendment crop rotation soil aggregates soil C-N sequestration enzyme activity |
| url | https://www.mdpi.com/2077-0472/15/10/1051 |
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