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| Effects of biochar and sodium selenite combination on physiological characteristics and cadmium selenide accumulation in rice |
| Received:January 24, 2025 |
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| KeyWord:biochar;sodium selenite;cadmium;selenium;rice;antioxidant enzyme |
| Author Name | Affiliation | E-mail | | JIANG Ya | Institute of Soil and Fertilizer, Guizhou Academy of Agricultural Sciences, Guiyang 550006, China | | | WU Daoming | Guiyang Rural Revitalization Service Centre, Guiyang 550081, China | | | ZHOU Kai | Kaiyang County Soil and Fertilizer Workstation, Guiyang 550300, China | | | WANG Li | Institute of Soil and Fertilizer, Guizhou Academy of Agricultural Sciences, Guiyang 550006, China | | | LIU Guihua | Institute of Soil and Fertilizer, Guizhou Academy of Agricultural Sciences, Guiyang 550006, China | | | CHAI Guanqun | Institute of Soil and Fertilizer, Guizhou Academy of Agricultural Sciences, Guiyang 550006, China | | | FAN Chengwu | Institute of Soil and Fertilizer, Guizhou Academy of Agricultural Sciences, Guiyang 550006, China | gzfcw@163.com |
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| Abstract: |
| This study was designed to examine the effects of different application methods of biochar and sodium selenite on reducing cadmium（Cd）and enriching selenium（Se）in rice grains, Quan 9 you 801, Yixiangyou 2115 and Longliangyouhuazhan were studied by pot experiment. It was conducted four treatments：no biochar and sodium selenite application（CK）, single application of biochar（B, biochar 2 g·kg-1）, single application of sodium selenite（S, sodium selenite 8 mg·L-1）, and combined application of biochar and sodium selenite（BS, biochar 2 g·kg-1+sodium selenite 8 mg·L-1）, to study the effects on yield, Se content, Cd content, and physiological characteristics under Cd stress. The results showed that different application methods of biochar and sodium selenite could significantly increase rice yield and reduce Cd content. Compared with CK, the yield per plant of Quan 9 you 801, Yixiangyou 2115 and Longliangyouhuazhan increased by 74.45%, 104.16%, and 92.41% respectively under BS treatment, 60.92%, 82.69%, and 65.46% under B treatment, and 33.43%, 46.54%, and 35.01% under S treatment. The Cd content in rice grains decreased by 58.09%, 72.62%, and 51.56% under BS treatment, 52.94%, 53.57%, and 38.54% under B treatment, 36.76%, 35.71%, and 23.96% under S treatment, respectively. The Se content increased by 100.00%, 70.77% and 140.00% under BS treatment, 2.27%, 8.46% and 12.00% under B treatment, 53.41%, 26.92% and 92.00% under S treatment, respectively. Different fertilization methods could increase the activity of antioxidant enzymes in rice leaves, decrease the content of malondialdehyde, and alleviate the damage of lipid membrane peroxidation under Cd stress. In conclusion, the combination of biochar and sodium selenite application is beneficial for promoting rice yield increase, reducing Cd and enriching Se, and can alleviate the damage of Cd stress on rice leaves. |
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