Variation of soil organic matter depends on light-fraction organic matter under long-term monocropping of different crops
Cultivating crops influences soil organic matter (SOM), but the effect of different crops remains unclear, particularly under long-term monocropping. The objective of this study was to identify how different crops influence the content and chemical structures of SOM under long-term monocropping. Her...
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| Format: | Article |
| Language: | English |
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Czech Academy of Agricultural Sciences
2021-10-01
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| Series: | Plant, Soil and Environment |
| Subjects: | |
| Online Access: | https://pse.agriculturejournals.cz/artkey/pse-202110-0005_variation-of-soil-organic-matter-depends-on-light-fraction-organic-matter-under-long-term-monocropping-of-diffe.php |
| _version_ | 1797898049788313600 |
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| author | Futao Zhang Yunfa Qiao Xiaozeng Han Bin Zhang |
| author_facet | Futao Zhang Yunfa Qiao Xiaozeng Han Bin Zhang |
| author_sort | Futao Zhang |
| collection | DOAJ |
| description | Cultivating crops influences soil organic matter (SOM), but the effect of different crops remains unclear, particularly under long-term monocropping. The objective of this study was to identify how different crops influence the content and chemical structures of SOM under long-term monocropping. Here, soils were sampled (0-20 cm) under 27-year soybean and maize monocropping and separated into different physical fractions. The content and chemical structures of SOM in all fractions were determined. SOM contents were higher under soybean than maize in bulk soil and macroaggregates and their light-fractions instead of microaggregates and silt and clay. The difference in SOM chemical structure was observed in aggregates and density fractions rather than bulk soils and supported by the result of principal component analysis. The proportion of O-alkyl C in macro- and microaggregates and all free light fractions and that of aromatic C in mineral-associated fractions were higher, while that of carbonyl C was lower under maize than soybean. These results demonstrated that different crops monocropping influences the content and chemical structures of SOM, and the variations were mainly in the light-fraction SOM and highlight a higher sensitivity of physical fractions than bulk soil to different crops. |
| first_indexed | 2024-04-10T08:07:00Z |
| format | Article |
| id | doaj.art-1061b24e7bff4c56a88ca0ba26b3dca6 |
| institution | Directory Open Access Journal |
| issn | 1214-1178 1805-9368 |
| language | English |
| last_indexed | 2024-04-10T08:07:00Z |
| publishDate | 2021-10-01 |
| publisher | Czech Academy of Agricultural Sciences |
| record_format | Article |
| series | Plant, Soil and Environment |
| spelling | doaj.art-1061b24e7bff4c56a88ca0ba26b3dca62023-02-23T03:47:00ZengCzech Academy of Agricultural SciencesPlant, Soil and Environment1214-11781805-93682021-10-01671058859910.17221/350/2021-PSEpse-202110-0005Variation of soil organic matter depends on light-fraction organic matter under long-term monocropping of different cropsFutao Zhang0Yunfa Qiao1Xiaozeng Han2Bin Zhang3National Observation Station of Hailun Agroecology System, Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin, P.R. ChinaNanjing University of Information Science and Technology, Nanjing, P.R. ChinaNational Observation Station of Hailun Agroecology System, Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin, P.R. ChinaNational Observation Station of Hailun Agroecology System, Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin, P.R. ChinaCultivating crops influences soil organic matter (SOM), but the effect of different crops remains unclear, particularly under long-term monocropping. The objective of this study was to identify how different crops influence the content and chemical structures of SOM under long-term monocropping. Here, soils were sampled (0-20 cm) under 27-year soybean and maize monocropping and separated into different physical fractions. The content and chemical structures of SOM in all fractions were determined. SOM contents were higher under soybean than maize in bulk soil and macroaggregates and their light-fractions instead of microaggregates and silt and clay. The difference in SOM chemical structure was observed in aggregates and density fractions rather than bulk soils and supported by the result of principal component analysis. The proportion of O-alkyl C in macro- and microaggregates and all free light fractions and that of aromatic C in mineral-associated fractions were higher, while that of carbonyl C was lower under maize than soybean. These results demonstrated that different crops monocropping influences the content and chemical structures of SOM, and the variations were mainly in the light-fraction SOM and highlight a higher sensitivity of physical fractions than bulk soil to different crops.https://pse.agriculturejournals.cz/artkey/pse-202110-0005_variation-of-soil-organic-matter-depends-on-light-fraction-organic-matter-under-long-term-monocropping-of-diffe.phpmollisolcrop specieschemical stabilityfarmlandcarbon turnover |
| spellingShingle | Futao Zhang Yunfa Qiao Xiaozeng Han Bin Zhang Variation of soil organic matter depends on light-fraction organic matter under long-term monocropping of different crops Plant, Soil and Environment mollisol crop species chemical stability farmland carbon turnover |
| title | Variation of soil organic matter depends on light-fraction organic matter under long-term monocropping of different crops |
| title_full | Variation of soil organic matter depends on light-fraction organic matter under long-term monocropping of different crops |
| title_fullStr | Variation of soil organic matter depends on light-fraction organic matter under long-term monocropping of different crops |
| title_full_unstemmed | Variation of soil organic matter depends on light-fraction organic matter under long-term monocropping of different crops |
| title_short | Variation of soil organic matter depends on light-fraction organic matter under long-term monocropping of different crops |
| title_sort | variation of soil organic matter depends on light fraction organic matter under long term monocropping of different crops |
| topic | mollisol crop species chemical stability farmland carbon turnover |
| url | https://pse.agriculturejournals.cz/artkey/pse-202110-0005_variation-of-soil-organic-matter-depends-on-light-fraction-organic-matter-under-long-term-monocropping-of-diffe.php |
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