Application of wheat straw-derived amendments combined with sulfate increases soil microbial diversity, reduces soil cadmium mobility and cadmium accumulation in rice
Cadmium (Cd) accumulation in rice grains poses severe health risks. Conventional straw amendments exhibit inconsistent efficacy, likely because of variations in amendment types and soil sulfur deficiency. The pot experiment was evaluated in a Cd-contaminated paddy soil (3.18 mg Cd kg−1) to compare t...
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Elsevier
2025-09-01
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| Series: | Ecotoxicology and Environmental Safety |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651325012618 |
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| author | Xianlin Ke Songyan Li Guoxi Wang Xiaosong Yang Mingming Tao Yanhua Qiu Yifei Li Yu Liu Lijuan Huang Zhengyi Hu |
| author_facet | Xianlin Ke Songyan Li Guoxi Wang Xiaosong Yang Mingming Tao Yanhua Qiu Yifei Li Yu Liu Lijuan Huang Zhengyi Hu |
| author_sort | Xianlin Ke |
| collection | DOAJ |
| description | Cadmium (Cd) accumulation in rice grains poses severe health risks. Conventional straw amendments exhibit inconsistent efficacy, likely because of variations in amendment types and soil sulfur deficiency. The pot experiment was evaluated in a Cd-contaminated paddy soil (3.18 mg Cd kg−1) to compare three treatments (1.0 % w/w) sources: WS (wheat straw), CW (wheat straw compost), and BW (wheat straw biochar) without or with sodium sulfate fertilization (30 mg sulfur kg−1). This experiment aimed to evaluate the Cd mobility, microbial diversity, and Cd accumulation in rice tissues. All treatments resulted in reduced Cd accumulation in brown rice at the maturity stage by 3 % (WS), 26 % (CW), and 60 % (BW), whereas sulfate co-application enhanced this reduction to 30 % (WS+S), 38 % (CW+S), and 66 % (BW+S). This could be attributed to decrease in soil Cd availability (17 %, 37 %, and 41 % for WS+S, CW+S, and BW+S, respectively, at the maturity stage), inhibition of Cd uptake by root iron plaque (-0.01 to −0.05), and decrease of Cd translocation in rice tissues (particularly phloem transfer). Microbial analysis revealed that biochar and compost preferentially increased bacterial alpha diversity and shifted microbial composition irrespective of sulfate supply, especially at the tillering and booting stages. Specifically, biochar and compost reduced Firmicutes (positively related to exchangeable Cd, P ≤ 0.01), and increased Bacteroidota and Proteobacteria (negatively related to exchangeable Cd, P ≤ 0.01) at these stages. These findings demonstrate that co-application of wheat straw biochar and sulfate offers a solution for remediating Cd-contaminated paddy soils while considering soil ecosystem health. |
| format | Article |
| id | doaj-art-19bda748df1543a6b4e53d7f69a6ebfb |
| institution | Kabale University |
| issn | 0147-6513 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj-art-19bda748df1543a6b4e53d7f69a6ebfb2025-08-22T04:54:47ZengElsevierEcotoxicology and Environmental Safety0147-65132025-09-0130311891610.1016/j.ecoenv.2025.118916Application of wheat straw-derived amendments combined with sulfate increases soil microbial diversity, reduces soil cadmium mobility and cadmium accumulation in riceXianlin Ke0Songyan Li1Guoxi Wang2Xiaosong Yang3Mingming Tao4Yanhua Qiu5Yifei Li6Yu Liu7Lijuan Huang8Zhengyi Hu9Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China; Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg 1871, Denmark; Sino-Danish Centre for Education and Research (SDC), Beijing 100190, ChinaSino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China; Sino-Danish Centre for Education and Research (SDC), Beijing 100190, ChinaNational Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaNational Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaSino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China; Sino-Danish Centre for Education and Research (SDC), Beijing 100190, China; Department of Plant and Environmental Science, Faculty of Science, University of Copenhagen, Taastrup DK-2630, DenmarkCollege of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, ChinaCollege of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, ChinaSino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China; Sino-Danish Centre for Education and Research (SDC), Beijing 100190, China; Department of Plant and Environmental Science, Faculty of Science, University of Copenhagen, Taastrup DK-2630, DenmarkSino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China; Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg 1871, Denmark; Sino-Danish Centre for Education and Research (SDC), Beijing 100190, ChinaSino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China; Sino-Danish Centre for Education and Research (SDC), Beijing 100190, China; Corresponding author at: Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China.Cadmium (Cd) accumulation in rice grains poses severe health risks. Conventional straw amendments exhibit inconsistent efficacy, likely because of variations in amendment types and soil sulfur deficiency. The pot experiment was evaluated in a Cd-contaminated paddy soil (3.18 mg Cd kg−1) to compare three treatments (1.0 % w/w) sources: WS (wheat straw), CW (wheat straw compost), and BW (wheat straw biochar) without or with sodium sulfate fertilization (30 mg sulfur kg−1). This experiment aimed to evaluate the Cd mobility, microbial diversity, and Cd accumulation in rice tissues. All treatments resulted in reduced Cd accumulation in brown rice at the maturity stage by 3 % (WS), 26 % (CW), and 60 % (BW), whereas sulfate co-application enhanced this reduction to 30 % (WS+S), 38 % (CW+S), and 66 % (BW+S). This could be attributed to decrease in soil Cd availability (17 %, 37 %, and 41 % for WS+S, CW+S, and BW+S, respectively, at the maturity stage), inhibition of Cd uptake by root iron plaque (-0.01 to −0.05), and decrease of Cd translocation in rice tissues (particularly phloem transfer). Microbial analysis revealed that biochar and compost preferentially increased bacterial alpha diversity and shifted microbial composition irrespective of sulfate supply, especially at the tillering and booting stages. Specifically, biochar and compost reduced Firmicutes (positively related to exchangeable Cd, P ≤ 0.01), and increased Bacteroidota and Proteobacteria (negatively related to exchangeable Cd, P ≤ 0.01) at these stages. These findings demonstrate that co-application of wheat straw biochar and sulfate offers a solution for remediating Cd-contaminated paddy soils while considering soil ecosystem health.http://www.sciencedirect.com/science/article/pii/S0147651325012618CadmiumRiceSulfurOrganic amendmentSynergistic remediationBacterial community |
| spellingShingle | Xianlin Ke Songyan Li Guoxi Wang Xiaosong Yang Mingming Tao Yanhua Qiu Yifei Li Yu Liu Lijuan Huang Zhengyi Hu Application of wheat straw-derived amendments combined with sulfate increases soil microbial diversity, reduces soil cadmium mobility and cadmium accumulation in rice Ecotoxicology and Environmental Safety Cadmium Rice Sulfur Organic amendment Synergistic remediation Bacterial community |
| title | Application of wheat straw-derived amendments combined with sulfate increases soil microbial diversity, reduces soil cadmium mobility and cadmium accumulation in rice |
| title_full | Application of wheat straw-derived amendments combined with sulfate increases soil microbial diversity, reduces soil cadmium mobility and cadmium accumulation in rice |
| title_fullStr | Application of wheat straw-derived amendments combined with sulfate increases soil microbial diversity, reduces soil cadmium mobility and cadmium accumulation in rice |
| title_full_unstemmed | Application of wheat straw-derived amendments combined with sulfate increases soil microbial diversity, reduces soil cadmium mobility and cadmium accumulation in rice |
| title_short | Application of wheat straw-derived amendments combined with sulfate increases soil microbial diversity, reduces soil cadmium mobility and cadmium accumulation in rice |
| title_sort | application of wheat straw derived amendments combined with sulfate increases soil microbial diversity reduces soil cadmium mobility and cadmium accumulation in rice |
| topic | Cadmium Rice Sulfur Organic amendment Synergistic remediation Bacterial community |
| url | http://www.sciencedirect.com/science/article/pii/S0147651325012618 |
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