Effects of Increased Acidification on Soil Available Cd and Rice
【Objective】The acidification materials were used to intensify soil acidification and the impacts of changes in soil pH on Cd activity in soil and rice yield and quality after acidification of Cd contaminated soil were explored, with a view to providing theoretical support for the remediation of Cd c...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Guangdong Academy of Agricultural Sciences
2023-03-01
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| Series: | Guangdong nongye kexue |
| Subjects: | |
| Online Access: | http://gdnykx.cnjournals.org/gdnykx/ch/reader/view_abstract.aspx?file_no=202303007 |
| _version_ | 1797805574982729728 |
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| author | Siyi WEI Shuanhu TANG Yuyi LI Guoxuan XIONG Mu ZHANG Tengfei WU |
| author_facet | Siyi WEI Shuanhu TANG Yuyi LI Guoxuan XIONG Mu ZHANG Tengfei WU |
| author_sort | Siyi WEI |
| collection | DOAJ |
| description | 【Objective】The acidification materials were used to intensify soil acidification and the impacts of changes in soil pH on Cd activity in soil and rice yield and quality after acidification of Cd contaminated soil were explored, with a view to providing theoretical support for the remediation of Cd contaminated soil.【Method】Through a soil culture experiment, the dynamic changes of soil pH and available Cd content in Cd contaminated soil after application of acidification materials were analyzed to explore the impacts of soil pH changes on Cd activity. By using a rice pot experiment, the effects of soil pH reduction on rice yield and quality were explored by analyzing the changes in rice biomass, yield and its components, Cd contents of rice plants and rice after soil acidification.【Result】The application of acidification materials can accurately reduce soil pH and form a certain pH gradient in the test soil. The soil pH values decreased by 0.33 and 0.67 units, and the soil available Cd contents increased by 0.04 and 0.07 mg/kg, respectively, with an increase of 21.05% and 36.84%. There was a significant negative correlation between soil available Cd and soil pH. The decrease in soil pH resulted in the inhibition of rice growth and plant emaciation. Compared with CK, the aboveground biomass of rice under pH 4.77 and pH 5.11 treatments decreased by 9.61% and 2.48%, respectively. Moreover, the effective number of panicles and filled grains, and seed setting rate of rice decreased with the decrease of soil pH, resulting in a decrease of 11.58% and 1.74% in the rice yield of pH 4.77 and pH 5.11 treatments compared with CK. Soil acidification led to the activation of heavy metals, resulting in an enhanced ability of rice plants and rice to enrich Cd. The Cd content of pH 4.77 and pH 5.11 plants increased by 87.52% and 1.13% compared with CK, respectively, while the Cd content of rice increased by 134.55% and 165.45% compared with CK.【Conclusion】Soil pH affects the form of Cd, and soil acidification increases the bioavailability of Cd. There is a significant negative correlation between soil available Cd and soil pH. Soil acidification impedes the growth of rice, reduces biomass in the above ground parts, decreases the number of panicles and filled grains, and reduces yield. Acidification also increases soil Cd activity, enhances ability of rice to absorb and enrich Cd, and increases the risk of heavy metal pollution correspondingly. |
| first_indexed | 2024-03-13T05:54:06Z |
| format | Article |
| id | doaj.art-ad87d1504ed5496297d0ff678d6e518d |
| institution | Directory Open Access Journal |
| issn | 1004-874X |
| language | English |
| last_indexed | 2024-03-13T05:54:06Z |
| publishDate | 2023-03-01 |
| publisher | Guangdong Academy of Agricultural Sciences |
| record_format | Article |
| series | Guangdong nongye kexue |
| spelling | doaj.art-ad87d1504ed5496297d0ff678d6e518d2023-06-13T08:09:37ZengGuangdong Academy of Agricultural SciencesGuangdong nongye kexue1004-874X2023-03-01503606810.16768/j.issn.1004-874X.2023.03.007202303007Effects of Increased Acidification on Soil Available Cd and RiceSiyi WEI0Shuanhu TANG1Yuyi LI2Guoxuan XIONG3Mu ZHANG4Tengfei WU5College of Resources and Environment, Zhongkai University of Agricultural and Engineering, Guangzhou 510225, ChinaInstitute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences/Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, ChinaInstitute of Agricultural Resources and Agricultural Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, ChinaMeizhou Daofeng Shiye Co. Ltd, Meizhou 514000, ChinaInstitute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences/Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, ChinaInstitute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences/Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, China【Objective】The acidification materials were used to intensify soil acidification and the impacts of changes in soil pH on Cd activity in soil and rice yield and quality after acidification of Cd contaminated soil were explored, with a view to providing theoretical support for the remediation of Cd contaminated soil.【Method】Through a soil culture experiment, the dynamic changes of soil pH and available Cd content in Cd contaminated soil after application of acidification materials were analyzed to explore the impacts of soil pH changes on Cd activity. By using a rice pot experiment, the effects of soil pH reduction on rice yield and quality were explored by analyzing the changes in rice biomass, yield and its components, Cd contents of rice plants and rice after soil acidification.【Result】The application of acidification materials can accurately reduce soil pH and form a certain pH gradient in the test soil. The soil pH values decreased by 0.33 and 0.67 units, and the soil available Cd contents increased by 0.04 and 0.07 mg/kg, respectively, with an increase of 21.05% and 36.84%. There was a significant negative correlation between soil available Cd and soil pH. The decrease in soil pH resulted in the inhibition of rice growth and plant emaciation. Compared with CK, the aboveground biomass of rice under pH 4.77 and pH 5.11 treatments decreased by 9.61% and 2.48%, respectively. Moreover, the effective number of panicles and filled grains, and seed setting rate of rice decreased with the decrease of soil pH, resulting in a decrease of 11.58% and 1.74% in the rice yield of pH 4.77 and pH 5.11 treatments compared with CK. Soil acidification led to the activation of heavy metals, resulting in an enhanced ability of rice plants and rice to enrich Cd. The Cd content of pH 4.77 and pH 5.11 plants increased by 87.52% and 1.13% compared with CK, respectively, while the Cd content of rice increased by 134.55% and 165.45% compared with CK.【Conclusion】Soil pH affects the form of Cd, and soil acidification increases the bioavailability of Cd. There is a significant negative correlation between soil available Cd and soil pH. Soil acidification impedes the growth of rice, reduces biomass in the above ground parts, decreases the number of panicles and filled grains, and reduces yield. Acidification also increases soil Cd activity, enhances ability of rice to absorb and enrich Cd, and increases the risk of heavy metal pollution correspondingly.http://gdnykx.cnjournals.org/gdnykx/ch/reader/view_abstract.aspx?file_no=202303007soil acidificationcdriceyieldphenrichmentheavy metal pollution |
| spellingShingle | Siyi WEI Shuanhu TANG Yuyi LI Guoxuan XIONG Mu ZHANG Tengfei WU Effects of Increased Acidification on Soil Available Cd and Rice Guangdong nongye kexue soil acidification cd rice yield ph enrichment heavy metal pollution |
| title | Effects of Increased Acidification on Soil Available Cd and Rice |
| title_full | Effects of Increased Acidification on Soil Available Cd and Rice |
| title_fullStr | Effects of Increased Acidification on Soil Available Cd and Rice |
| title_full_unstemmed | Effects of Increased Acidification on Soil Available Cd and Rice |
| title_short | Effects of Increased Acidification on Soil Available Cd and Rice |
| title_sort | effects of increased acidification on soil available cd and rice |
| topic | soil acidification cd rice yield ph enrichment heavy metal pollution |
| url | http://gdnykx.cnjournals.org/gdnykx/ch/reader/view_abstract.aspx?file_no=202303007 |
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