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| Effects of different sprayed nanomaterials on the phosphorus content in rice seedlings |
| Received:July 25, 2019 |
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| KeyWord:nanomaterial;rice;biomass;phosphorus |
| Author Name | Affiliation | E-mail | | LU Ke | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affair, Tianjin 300191, China | | | SONG Zheng-guo | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affair, Tianjin 300191, China
Shantou University, Shantou 515021, China | forestman1218@163.com |
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| Abstract: |
| In order to explore the effects of different sprayed nanomaterials on the biomass and phosphorous content of rice seedlings, rice seedlings were cultured in different phosphorous nutrient solutions with different concentrations of various types of nanomaterials, including hydroxyapatite(nHA) with particle size of 40 nm, ferric oxide(nFe2O3), zero-valent iron(nFe), ceria(nCeO2), and chitin[CH, (C8H13NO5) n] suspension, were sprayed on the leaves of rice seedlings. Under normal phosphorus supply condition, the shoot biomass reached a maximum when nHA, nFe2O3, and nFe were sprayed at concentrations of 200, 100, and 150 mg·L-1, respectively, whereas these concentrations were 150, 100, and 100 mg·L-1 for the root biomass to reach a maximum. However, most treatments did not significantly improve the phosphorus content of rice seedlings. Under the condition of 1/2 phosphorus supply, all treatments can promote the phosphorus uptake of rice seedlings to different degrees. The biomass reached the maximum when nHA, nFe2O3, nFe, nCeO2, and CH were sprayed at concentrations of 50, 100, 100, 100, and 150 mg·L-1, respectively. nHA, nFe2O3, and nFe treatments can significantly promote the shoot phosphorus content, and reach the peak content when treated with concentrations of 150, 100, and 150 mg·L-1. The study showed that nHA, nFe2O3, nFe, nCeO2 with particle size of 40 nm, and CH, sprayed with different phosphorus concentrations, can promote rice seedling growth to different degrees. With sufficient phosphorus supply, the biomass promoted by nHA and nFe treatment was found to be significant. In the absence of phosphorus, nHA, nFe2O3, and nFe can improve phosphorus absorption. |
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