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Use of soil amendments to reduce cadmium accumulation in rice by changing Cd distribution in soil aggregates.
Environ Sci Pollut Res Int. 2019 Jul; 26(20):20929-20938.ES

Abstract

The objectives of this study were to investigate the response of cadmium (Cd) distribution and stability in soil aggregates as affected by applying different amendments and to understand the relationship between changes in soil aggregates and alleviation of Cd phytotoxicity to rice after amendment application. In the present study, rice (Oryza sativa L.) was cultivated on a Cd-polluted soil. Five soil amendments were applied, which are as follows: rice husk biochar (BC), Fe-added rice husk biochar (Fe-BC), attapulgite-based mixture (AM), zeolite-based mixture (ZM), and cow manure-based mixture (MM). The effect on Cd redistribution in soil and Cd accumulation in rice plant was evaluated. The results showed that the five amendments applied at the rate of 3% (w/w) significantly increased soil pH and decreased Cd mobility in soil and Cd accumulation in rice plants. The reduction rate of Cd content in rice grains ranged from 41 to 62% after amendment application. The remediation efficiency of the different amendments for decreasing Cd accumulation in rice tissues followed the order of Fe-BC > MM > BC > ZM > AM. Adding amendments promoted the formation of large aggregates (0.2-2.0 mm) with more mass loading of Cd and enhanced aggregate stability. Comparatively, Fe-BC was more effective than others for remediation of acid Cd-polluted paddy soil, as a significantly decreased Cd concentration in rice grain after its application was observed. Structural equation modeling (SEM) analysis revealed that DTPA-extractable Cd in small aggregates was the main factor affecting Cd accumulation in rice grain; soil pH directly affected aggregate stability; and aggregate stability was closely related to Cd availability in different size soil particles. These results indicated that the applied amendments were effective in reducing Cd bioavailability, most likely through raising the soil pH, improving aggregate stability, and re-distributing Cd from smaller soil aggregates to larger ones.

Authors+Show Affiliations

School of Land Science and Technology, China University of Geosciences, 100083, Beijing, People's Republic of China.Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, 100081, Beijing, People's Republic of China. wangmeng@caas.cn.School of Land Science and Technology, China University of Geosciences, 100083, Beijing, People's Republic of China.School of Land Science and Technology, China University of Geosciences, 100083, Beijing, People's Republic of China.Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, 100081, Beijing, People's Republic of China. chenshibao@caas.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31115810

Citation

Li, Shanshan, et al. "Use of Soil Amendments to Reduce Cadmium Accumulation in Rice By Changing Cd Distribution in Soil Aggregates." Environmental Science and Pollution Research International, vol. 26, no. 20, 2019, pp. 20929-20938.
Li S, Wang M, Zhao Z, et al. Use of soil amendments to reduce cadmium accumulation in rice by changing Cd distribution in soil aggregates. Environ Sci Pollut Res Int. 2019;26(20):20929-20938.
Li, S., Wang, M., Zhao, Z., Li, X., & Chen, S. (2019). Use of soil amendments to reduce cadmium accumulation in rice by changing Cd distribution in soil aggregates. Environmental Science and Pollution Research International, 26(20), 20929-20938. https://doi.org/10.1007/s11356-019-05431-4
Li S, et al. Use of Soil Amendments to Reduce Cadmium Accumulation in Rice By Changing Cd Distribution in Soil Aggregates. Environ Sci Pollut Res Int. 2019;26(20):20929-20938. PubMed PMID: 31115810.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Use of soil amendments to reduce cadmium accumulation in rice by changing Cd distribution in soil aggregates. AU - Li,Shanshan, AU - Wang,Meng, AU - Zhao,Zhongqiu, AU - Li,Xiaoyue, AU - Chen,Shibao, Y1 - 2019/05/21/ PY - 2018/11/20/received PY - 2019/05/08/accepted PY - 2019/5/23/pubmed PY - 2019/9/5/medline PY - 2019/5/23/entrez KW - Amendments KW - Cd KW - Phytotoxicity KW - Rice KW - SEM KW - Soil aggregates SP - 20929 EP - 20938 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 26 IS - 20 N2 - The objectives of this study were to investigate the response of cadmium (Cd) distribution and stability in soil aggregates as affected by applying different amendments and to understand the relationship between changes in soil aggregates and alleviation of Cd phytotoxicity to rice after amendment application. In the present study, rice (Oryza sativa L.) was cultivated on a Cd-polluted soil. Five soil amendments were applied, which are as follows: rice husk biochar (BC), Fe-added rice husk biochar (Fe-BC), attapulgite-based mixture (AM), zeolite-based mixture (ZM), and cow manure-based mixture (MM). The effect on Cd redistribution in soil and Cd accumulation in rice plant was evaluated. The results showed that the five amendments applied at the rate of 3% (w/w) significantly increased soil pH and decreased Cd mobility in soil and Cd accumulation in rice plants. The reduction rate of Cd content in rice grains ranged from 41 to 62% after amendment application. The remediation efficiency of the different amendments for decreasing Cd accumulation in rice tissues followed the order of Fe-BC > MM > BC > ZM > AM. Adding amendments promoted the formation of large aggregates (0.2-2.0 mm) with more mass loading of Cd and enhanced aggregate stability. Comparatively, Fe-BC was more effective than others for remediation of acid Cd-polluted paddy soil, as a significantly decreased Cd concentration in rice grain after its application was observed. Structural equation modeling (SEM) analysis revealed that DTPA-extractable Cd in small aggregates was the main factor affecting Cd accumulation in rice grain; soil pH directly affected aggregate stability; and aggregate stability was closely related to Cd availability in different size soil particles. These results indicated that the applied amendments were effective in reducing Cd bioavailability, most likely through raising the soil pH, improving aggregate stability, and re-distributing Cd from smaller soil aggregates to larger ones. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/31115810/Use_of_soil_amendments_to_reduce_cadmium_accumulation_in_rice_by_changing_Cd_distribution_in_soil_aggregates_ DB - PRIME DP - Unbound Medicine ER -