Green Manure Amendment in Paddies Improves Soil Carbon Sequestration but Cannot Substitute the Critical Role of N Fertilizer in Rice Production
Clarifying the benefits of carbon sequestration and crop production of continuous green manure amendment is crucial for sustainable agricultural development. Here, using a long-term located experiment, we assessed the effects of 18 years’ ryegrass/milk vetch amendment with (NF, 150 kg N ha<sup>...
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MDPI AG
2022-06-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/12/7/1548 |
| _version_ | 1797407910698942464 |
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| author | Pengfu Hou Lixiang Xue Jing Wang Evangelos Petropoulos Lihong Xue Linzhang Yang |
| author_facet | Pengfu Hou Lixiang Xue Jing Wang Evangelos Petropoulos Lihong Xue Linzhang Yang |
| author_sort | Pengfu Hou |
| collection | DOAJ |
| description | Clarifying the benefits of carbon sequestration and crop production of continuous green manure amendment is crucial for sustainable agricultural development. Here, using a long-term located experiment, we assessed the effects of 18 years’ ryegrass/milk vetch amendment with (NF, 150 kg N ha<sup>−</sup><sup>1</sup>) or without nitrogen (N) fertilizer input (CK), on soil carbon management indices, paddy methane (CH<sub>4</sub>) emissions and rice yields. The results showed that green manure, rather than fertilization, played a critical role in soil CMI, increasing the carbon pool index but reducing the carbon management index. The increased soil organic carbon and the reduced labile organic carbon were the main causes for this performance. Additionally, the effects of both fertilization and green manure amendment on CH<sub>4</sub> emissions were insignificant; however, fertilization significantly increased grain yield by 39.30% compared to CK. As a result, the methane emission intensity under fertilization treatment was notably lower than that from CK. The findings suggest that green manure amendment is a profitable manipulation for enhancing carbon sequestration without increasing paddy CH<sub>4</sub> emissions. However, this cannot substitute the critical role of N fertilizer in rice production. |
| first_indexed | 2024-03-09T03:49:36Z |
| format | Article |
| id | doaj.art-8b88bb24c5a74218adcb1b4024aeb225 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-09T03:49:36Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-8b88bb24c5a74218adcb1b4024aeb2252023-12-03T14:30:18ZengMDPI AGAgronomy2073-43952022-06-01127154810.3390/agronomy12071548Green Manure Amendment in Paddies Improves Soil Carbon Sequestration but Cannot Substitute the Critical Role of N Fertilizer in Rice ProductionPengfu Hou0Lixiang Xue1Jing Wang2Evangelos Petropoulos3Lihong Xue4Linzhang Yang5Key Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs of China, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, ChinaKey Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs of China, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, ChinaCo-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing 210037, ChinaSchool of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UKKey Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs of China, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, ChinaKey Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs of China, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, ChinaClarifying the benefits of carbon sequestration and crop production of continuous green manure amendment is crucial for sustainable agricultural development. Here, using a long-term located experiment, we assessed the effects of 18 years’ ryegrass/milk vetch amendment with (NF, 150 kg N ha<sup>−</sup><sup>1</sup>) or without nitrogen (N) fertilizer input (CK), on soil carbon management indices, paddy methane (CH<sub>4</sub>) emissions and rice yields. The results showed that green manure, rather than fertilization, played a critical role in soil CMI, increasing the carbon pool index but reducing the carbon management index. The increased soil organic carbon and the reduced labile organic carbon were the main causes for this performance. Additionally, the effects of both fertilization and green manure amendment on CH<sub>4</sub> emissions were insignificant; however, fertilization significantly increased grain yield by 39.30% compared to CK. As a result, the methane emission intensity under fertilization treatment was notably lower than that from CK. The findings suggest that green manure amendment is a profitable manipulation for enhancing carbon sequestration without increasing paddy CH<sub>4</sub> emissions. However, this cannot substitute the critical role of N fertilizer in rice production.https://www.mdpi.com/2073-4395/12/7/1548green manurenitrogen fertilizersoil carbon management indicesmethane emissionsrice production |
| spellingShingle | Pengfu Hou Lixiang Xue Jing Wang Evangelos Petropoulos Lihong Xue Linzhang Yang Green Manure Amendment in Paddies Improves Soil Carbon Sequestration but Cannot Substitute the Critical Role of N Fertilizer in Rice Production Agronomy green manure nitrogen fertilizer soil carbon management indices methane emissions rice production |
| title | Green Manure Amendment in Paddies Improves Soil Carbon Sequestration but Cannot Substitute the Critical Role of N Fertilizer in Rice Production |
| title_full | Green Manure Amendment in Paddies Improves Soil Carbon Sequestration but Cannot Substitute the Critical Role of N Fertilizer in Rice Production |
| title_fullStr | Green Manure Amendment in Paddies Improves Soil Carbon Sequestration but Cannot Substitute the Critical Role of N Fertilizer in Rice Production |
| title_full_unstemmed | Green Manure Amendment in Paddies Improves Soil Carbon Sequestration but Cannot Substitute the Critical Role of N Fertilizer in Rice Production |
| title_short | Green Manure Amendment in Paddies Improves Soil Carbon Sequestration but Cannot Substitute the Critical Role of N Fertilizer in Rice Production |
| title_sort | green manure amendment in paddies improves soil carbon sequestration but cannot substitute the critical role of n fertilizer in rice production |
| topic | green manure nitrogen fertilizer soil carbon management indices methane emissions rice production |
| url | https://www.mdpi.com/2073-4395/12/7/1548 |
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