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| Effect of foliar spraying different forms of sulfur on cadmium accumulation in rice |
| Received:February 24, 2021 |
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| KeyWord:cadmium;sulfur;rice;foliar spray |
| Author Name | Affiliation | E-mail | | ZHAO Nana | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Hunan Engineering & Technology Research Center for Irrigation Water Purification, Changsha 410128, China
Key Laboratory of Southern Farmland Pollution Prevention and Control, Ministry of Agriculture, Changsha 410128, Chinas | | | PENG Ou | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Hunan Engineering & Technology Research Center for Irrigation Water Purification, Changsha 410128, China
Key Laboratory of Southern Farmland Pollution Prevention and Control, Ministry of Agriculture, Changsha 410128, Chinas | | | LIU Yuling | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Hunan Engineering & Technology Research Center for Irrigation Water Purification, Changsha 410128, China
Key Laboratory of Southern Farmland Pollution Prevention and Control, Ministry of Agriculture, Changsha 410128, Chinas | | | DONG Sijun | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Hunan Engineering & Technology Research Center for Irrigation Water Purification, Changsha 410128, China
Key Laboratory of Southern Farmland Pollution Prevention and Control, Ministry of Agriculture, Changsha 410128, Chinas | | | CHEN Zhuo | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Hunan Engineering & Technology Research Center for Irrigation Water Purification, Changsha 410128, China
Key Laboratory of Southern Farmland Pollution Prevention and Control, Ministry of Agriculture, Changsha 410128, Chinas | | | YIN Xuefei | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Hunan Engineering & Technology Research Center for Irrigation Water Purification, Changsha 410128, China
Key Laboratory of Southern Farmland Pollution Prevention and Control, Ministry of Agriculture, Changsha 410128, Chinas | | | HUANG Xinming | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Hunan Engineering & Technology Research Center for Irrigation Water Purification, Changsha 410128, China
Key Laboratory of Southern Farmland Pollution Prevention and Control, Ministry of Agriculture, Changsha 410128, Chinas | | | WU De | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Hunan Engineering & Technology Research Center for Irrigation Water Purification, Changsha 410128, China
Key Laboratory of Southern Farmland Pollution Prevention and Control, Ministry of Agriculture, Changsha 410128, Chinas | | | ZHANG Puxin | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Hunan Engineering & Technology Research Center for Irrigation Water Purification, Changsha 410128, China
Key Laboratory of Southern Farmland Pollution Prevention and Control, Ministry of Agriculture, Changsha 410128, Chinas | | | TIE Boqing | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Hunan Engineering & Technology Research Center for Irrigation Water Purification, Changsha 410128, China
Key Laboratory of Southern Farmland Pollution Prevention and Control, Ministry of Agriculture, Changsha 410128, Chinas | tiebq@qq.com |
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| Abstract: |
| The effect of foliar spraying different forms of sulfur（S）on reducing the cadmium（Cd）uptake of the brown rice "Xiangzaoxian 45" were carried out through pot and field experiments. Three forms of sulfur [cysteine（Cys）in —SH form, potassium sulfate （K2SO4）in SO42- form, and potassium sulfide（K2S）in S2- form] were sprayed on the surface of leaves of "Xiangzaoxian 45"（once at the tillering stage, and twice at tillering stage and booting stage）. In the pot experiment, silicon（Si）fertilizer, potassium nitrate（KNO3）, and tap water were used as a control, while in the field experiment, tap water was used as a control. The results showed that the three forms of sulfur and silicon had significant effects on reducing Cd uptake in the brown rice compared with the tap water control, and KNO3 had no effect on reducing Cd in rice. The ability the different forms of sulfur to reduce the Cd concentration in the rice was in the following order： Cys > K2S > Si > K2SO4, and the Cd concentration in the rice decreased by 53.57%, 46.43%, 39.29%, and 28.57%, respectively, after spraying the leaf fertilizers twice in the pot experiment. In the field experiment, the Cd concentration in the brown rice decreased by 47.18%, 39.49%, and 27.69% by spraying Cys, K2S, and K2SO4, respectively. Spraying different forms of S and Si foliar fertilizer reduced the Cd concentration in the brown rice by reducing the Cd transfer coefficient from stem to leaf. The results of the pot and field experiments suggested that the effect of the three different forms of S on reducing the Cd concentration in brown rice was Cys>K2S>K2SO4, while Cys and K2S can reduce the Cd content to <0.2 mg·kg-1, and spraying twice was better. |
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