Effect of Reforestation Tree Species on the Distribution and Stability of Purple Soil Aggregates
[Objective] Afforestation following the Grain for Green initiative is a crucial measure to improve soil structure and reduce soil erosion. Understanding the mechanisms of the effects of afforestation tree species on the formation of soil aggregates can provide valuable insights for soil conservation...
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Editorial Department of Journal of Soil and Water Conservation
2024-12-01
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| Series: | Shuitu Baochi Xuebao |
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| Online Access: | http://stbcxb.alljournal.com.cn/stbcxben/article/abstract/20240630 |
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| author | ZHONG Yujian HE Feng HAN Guangzhong ZHAO Xia YANG Fan |
| author_facet | ZHONG Yujian HE Feng HAN Guangzhong ZHAO Xia YANG Fan |
| author_sort | ZHONG Yujian |
| collection | DOAJ |
| description | [Objective] Afforestation following the Grain for Green initiative is a crucial measure to improve soil structure and reduce soil erosion. Understanding the mechanisms of the effects of afforestation tree species on the formation of soil aggregates can provide valuable insights for soil conservation. [Method] Four types of artificial forests (Cryptomeria fortunei (CF), Cryptomeria fortunei and Betula luminifera (MF), Camellia sinensis (CS), and Neosinocalamus affinis (NA)) established on sloping farmland (SF) (cornfield) in the Rainy Area of Western China after 20 years of afforestation were taken as the research objects, in order to analyze the changes in soil aggregate content and stability after the conversion from farmland to artificial forests. [Results] (1) Compared to the sloping farmland, the artificial forests of MF, CS, and NA significantly increased the soil aggregates >5 mm, but decreasd the 0.5~1 mm soil aggregates (p < 0.05). The dominant soil aggregates shifted from 0.5~1 mm to >5 mm. (2) The soil aggregate parameters, including the geometric mean diameter (GMD), mean weight diameter (MWD), and the content of aggregates of >0.25 mm (R0.25), increased by 46.93%~330.30%, 47.01%~191.03% and 5.02%~19.66%, respectively, in the artificial forests. Conversely, the destruction rate (PAD0.25) and fractal dimension (PSD) decreased by 15.41%~75.09% and 1.65%~9.20%, respectively. These indicators of aggregate stability consistently demonstrated that the stability of soil aggregates in the artificial forests was enhanced, with a specific ranking of CS > NA > MF > CF, indicating that CS and NA were both relatively superior. (3) The content and stability of dominant soil aggregates were extremely significantly positively correlated with the content of NOC, and extremely significantly negatively correlated with the content of soil gravel (p < 0.01). [Conclusion] The weathering of purple soil following afforestation provides the material foundation for aggregate formation, while the humus formed in the soil of artificial forests acts as a binding agent, promoting the formation of large aggregates and the maintenance of their stability. |
| format | Article |
| id | doaj-art-32fb0f4014bc41ddbb1eb34a9b6a156f |
| institution | Kabale University |
| issn | 1009-2242 |
| language | zho |
| publishDate | 2024-12-01 |
| publisher | Editorial Department of Journal of Soil and Water Conservation |
| record_format | Article |
| series | Shuitu Baochi Xuebao |
| spelling | doaj-art-32fb0f4014bc41ddbb1eb34a9b6a156f2025-02-10T07:24:20ZzhoEditorial Department of Journal of Soil and Water ConservationShuitu Baochi Xuebao1009-22422024-12-0138628429210.13870/j.cnki.stbcxb.2024.06.0101009-2242-(2024)06-0284-09Effect of Reforestation Tree Species on the Distribution and Stability of Purple Soil AggregatesZHONG Yujian0HE Feng1HAN Guangzhong2ZHAO Xia3YANG Fan4Qinghai Provincial Key Laboratory of Physical Geography and Environmental Process, College of Geographical Science, Qinghai Normal University, Xining 810008, ChinaEngineering Technology Center for Soil Process Simulation and Pollution Remediation in Neijiang City, College of Geography and Resources Science, Neijiang Normal University, Neijiang, Sichuan 641100, ChinaEngineering Technology Center for Soil Process Simulation and Pollution Remediation in Neijiang City, College of Geography and Resources Science, Neijiang Normal University, Neijiang, Sichuan 641100, ChinaQinghai Provincial Key Laboratory of Physical Geography and Environmental Process, College of Geographical Science, Qinghai Normal University, Xining 810008, ChinaEngineering Technology Center for Soil Process Simulation and Pollution Remediation in Neijiang City, College of Geography and Resources Science, Neijiang Normal University, Neijiang, Sichuan 641100, China[Objective] Afforestation following the Grain for Green initiative is a crucial measure to improve soil structure and reduce soil erosion. Understanding the mechanisms of the effects of afforestation tree species on the formation of soil aggregates can provide valuable insights for soil conservation. [Method] Four types of artificial forests (Cryptomeria fortunei (CF), Cryptomeria fortunei and Betula luminifera (MF), Camellia sinensis (CS), and Neosinocalamus affinis (NA)) established on sloping farmland (SF) (cornfield) in the Rainy Area of Western China after 20 years of afforestation were taken as the research objects, in order to analyze the changes in soil aggregate content and stability after the conversion from farmland to artificial forests. [Results] (1) Compared to the sloping farmland, the artificial forests of MF, CS, and NA significantly increased the soil aggregates >5 mm, but decreasd the 0.5~1 mm soil aggregates (p < 0.05). The dominant soil aggregates shifted from 0.5~1 mm to >5 mm. (2) The soil aggregate parameters, including the geometric mean diameter (GMD), mean weight diameter (MWD), and the content of aggregates of >0.25 mm (R0.25), increased by 46.93%~330.30%, 47.01%~191.03% and 5.02%~19.66%, respectively, in the artificial forests. Conversely, the destruction rate (PAD0.25) and fractal dimension (PSD) decreased by 15.41%~75.09% and 1.65%~9.20%, respectively. These indicators of aggregate stability consistently demonstrated that the stability of soil aggregates in the artificial forests was enhanced, with a specific ranking of CS > NA > MF > CF, indicating that CS and NA were both relatively superior. (3) The content and stability of dominant soil aggregates were extremely significantly positively correlated with the content of NOC, and extremely significantly negatively correlated with the content of soil gravel (p < 0.01). [Conclusion] The weathering of purple soil following afforestation provides the material foundation for aggregate formation, while the humus formed in the soil of artificial forests acts as a binding agent, promoting the formation of large aggregates and the maintenance of their stability.http://stbcxb.alljournal.com.cn/stbcxben/article/abstract/20240630soil structuregrain for greentree speciessoil aggregatesthe rainy area of western china |
| spellingShingle | ZHONG Yujian HE Feng HAN Guangzhong ZHAO Xia YANG Fan Effect of Reforestation Tree Species on the Distribution and Stability of Purple Soil Aggregates Shuitu Baochi Xuebao soil structure grain for green tree species soil aggregates the rainy area of western china |
| title | Effect of Reforestation Tree Species on the Distribution and Stability of Purple Soil Aggregates |
| title_full | Effect of Reforestation Tree Species on the Distribution and Stability of Purple Soil Aggregates |
| title_fullStr | Effect of Reforestation Tree Species on the Distribution and Stability of Purple Soil Aggregates |
| title_full_unstemmed | Effect of Reforestation Tree Species on the Distribution and Stability of Purple Soil Aggregates |
| title_short | Effect of Reforestation Tree Species on the Distribution and Stability of Purple Soil Aggregates |
| title_sort | effect of reforestation tree species on the distribution and stability of purple soil aggregates |
| topic | soil structure grain for green tree species soil aggregates the rainy area of western china |
| url | http://stbcxb.alljournal.com.cn/stbcxben/article/abstract/20240630 |
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