Retention and loss pathways of soluble nutrients in biochar-treated slope land soil based on a rainfall simulator
Global food crisis makes intense agricultural activity necessary, which accelerates soil degradation and increases pollution risk to nearby catchments. Application of biochar can effectively retain plant-required nutrients in soils. However, the linkage between retention and loss pathways of nutrien...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-06-01
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| Series: | Soil & Environmental Health |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949919423000213 |
| _version_ | 1797347046597853184 |
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| author | Selly Maisyarah Jyun-Yuan Chen Zeng-Yei Hseu Shih-Hao Jien |
| author_facet | Selly Maisyarah Jyun-Yuan Chen Zeng-Yei Hseu Shih-Hao Jien |
| author_sort | Selly Maisyarah |
| collection | DOAJ |
| description | Global food crisis makes intense agricultural activity necessary, which accelerates soil degradation and increases pollution risk to nearby catchments. Application of biochar can effectively retain plant-required nutrients in soils. However, the linkage between retention and loss pathways of nutrients is still unclear, particularly at slope lands. Therefore, a simulated rainfall experiment (rainfall intensity = 50 mm h−1) was conducted in a sandy soil with 10° gradient slope (indoor experiment) to clarify loss pathways of soluble C, N, P and K in biochar-amended soils. Wood biochar pyrolized at 300 °C (LWB) or 600 °C (HWB) was applied at 1% (LWB1; HWB1) or 2% (LWB2; HWB2). Our results show that the pathways for C, N, P and K loss was percolation > surface runoff > soil erosion. Compared to control, HWB2 treatment had a 2–4 times higher infiltration amount but 5–6 times lower surface runoff and soil loss, indicating that this treatment alleviated nutrient loss via erosion and runoff in the sloped soil. Among all treatments, HWB2 treatment was the most effective for retaining organic C, dissolved organic C, total N, and exchangeable K through various pathways. However, a substantial amount of soluble P was lost through percolation. Therefore, the potential pollution of groundwater by P through percolation pathway should be considered during biochar application. |
| first_indexed | 2024-03-08T11:40:52Z |
| format | Article |
| id | doaj.art-e1bc72d3312046c9b407430b1ab29229 |
| institution | Directory Open Access Journal |
| issn | 2949-9194 |
| language | English |
| last_indexed | 2024-03-08T11:40:52Z |
| publishDate | 2023-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Soil & Environmental Health |
| spelling | doaj.art-e1bc72d3312046c9b407430b1ab292292024-01-25T05:25:07ZengElsevierSoil & Environmental Health2949-91942023-06-0112100021Retention and loss pathways of soluble nutrients in biochar-treated slope land soil based on a rainfall simulatorSelly Maisyarah0Jyun-Yuan Chen1Zeng-Yei Hseu2Shih-Hao Jien3Department of Tropical Agriculture and International Cooperation, National Pingtung University of Science and Technology, Pingtung 91201, TaiwanDepartment of Soil and Water Conservation, National Pingtung University of Science and Technology, Pingtung 91201, TaiwanDepartment of Agricultural Chemistry, National Taiwan University, Taipei 10406, Taiwan; Corresponding author.Department of Soil and Water Conservation, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan; Corresponding author.Global food crisis makes intense agricultural activity necessary, which accelerates soil degradation and increases pollution risk to nearby catchments. Application of biochar can effectively retain plant-required nutrients in soils. However, the linkage between retention and loss pathways of nutrients is still unclear, particularly at slope lands. Therefore, a simulated rainfall experiment (rainfall intensity = 50 mm h−1) was conducted in a sandy soil with 10° gradient slope (indoor experiment) to clarify loss pathways of soluble C, N, P and K in biochar-amended soils. Wood biochar pyrolized at 300 °C (LWB) or 600 °C (HWB) was applied at 1% (LWB1; HWB1) or 2% (LWB2; HWB2). Our results show that the pathways for C, N, P and K loss was percolation > surface runoff > soil erosion. Compared to control, HWB2 treatment had a 2–4 times higher infiltration amount but 5–6 times lower surface runoff and soil loss, indicating that this treatment alleviated nutrient loss via erosion and runoff in the sloped soil. Among all treatments, HWB2 treatment was the most effective for retaining organic C, dissolved organic C, total N, and exchangeable K through various pathways. However, a substantial amount of soluble P was lost through percolation. Therefore, the potential pollution of groundwater by P through percolation pathway should be considered during biochar application.http://www.sciencedirect.com/science/article/pii/S2949919423000213Surface runoffSoil nutrientsC, N, P, and KLoss pathwayErosion and retentionLeaching and percolation |
| spellingShingle | Selly Maisyarah Jyun-Yuan Chen Zeng-Yei Hseu Shih-Hao Jien Retention and loss pathways of soluble nutrients in biochar-treated slope land soil based on a rainfall simulator Soil & Environmental Health Surface runoff Soil nutrients C, N, P, and K Loss pathway Erosion and retention Leaching and percolation |
| title | Retention and loss pathways of soluble nutrients in biochar-treated slope land soil based on a rainfall simulator |
| title_full | Retention and loss pathways of soluble nutrients in biochar-treated slope land soil based on a rainfall simulator |
| title_fullStr | Retention and loss pathways of soluble nutrients in biochar-treated slope land soil based on a rainfall simulator |
| title_full_unstemmed | Retention and loss pathways of soluble nutrients in biochar-treated slope land soil based on a rainfall simulator |
| title_short | Retention and loss pathways of soluble nutrients in biochar-treated slope land soil based on a rainfall simulator |
| title_sort | retention and loss pathways of soluble nutrients in biochar treated slope land soil based on a rainfall simulator |
| topic | Surface runoff Soil nutrients C, N, P, and K Loss pathway Erosion and retention Leaching and percolation |
| url | http://www.sciencedirect.com/science/article/pii/S2949919423000213 |
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