Effect of Amorphous Silicon Dioxide on Cadmium Behavior in the Soil–Rice Plant System
| Autor: | Vladimir Matichenkov, D. M. Khomiakov, Pengbo Zhang, Elena Bocharnikova, E. P. Pakhnenko, Yuqiao Liu |
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| Rok vydání: | 2018 |
| Předmět: |
inorganic chemicals
0106 biological sciences Amorphous silicon Cadmium Silicon Silicon dioxide Field experiment food and beverages chemistry.chemical_element 010501 environmental sciences engineering.material 01 natural sciences Amorphous solid chemistry.chemical_compound chemistry Environmental chemistry engineering Fertilizer Plant nutrition 010606 plant biology & botany 0105 earth and related environmental sciences |
| Zdroj: | Moscow University Soil Science Bulletin. 73:34-38 |
| ISSN: | 1934-7928 0147-6874 |
| Popis: | The effect of amorphous silicon dioxide (SiO2) on cadmium behavior in the soil–plant system was studied in a field experiment on a flooded paddy soil slightly contaminated by cadmium. The application of amorphous SiO2 results in a 1.3- to 1.8-fold smaller cadmium accumulation in the aboveground organs of rice and a 1.8- to 2.6-fold decrease in the content of its available compounds, which can be explained by metal sorption on the surface of applied silicon dioxide and by the reaction of monosilicic acid, which forms in the SiO2 solution, with cadmium. The decrease in cadmium availability is most intensive in the first 2 weeks after SiO2 application. Amorphous silicon causes a 26.6% increase in rice productivity in the first season and 72.9% in the second. The data obtained testify to the fact that the application rates of traditional mineral fertilizers can be decreased without risk to rice productivity if silicon compounds are used. They should become an integral and important part of implementing the 4R-STRATEGY for fertilizer application and plant nutrition optimization. |
| Databáze: | OpenAIRE |
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