天津农业科学2025，Vol.31Issue(8)：78-83,6.DOI:10.3969/j.issn.1006-6500.2025.08.012
生物炭对硒镉高背景区域稻田富硒水稻生产的影响
Effect of Biochar on Selenium-Enriched Rice Production in Paddy Fields with High Background of Seleni-um and Cadmium
摘要
Abstract
In order to explore the effect of biochar on the production of selenium-enriched rice and the underlying mechanisms in pad-dy fields with high levels of background selenium and cadmium,this study analyzed rice yield,as well as the selenium and cadmium content of rice,under different levels of biochar application.Changes in the physicochemical properties of paddy soil,the active sele-nium and cadmium content of soil,and the morphology of selenium and cadmium were also examined through a field plot experiment.The results showed that applying biochar at level BC2 significantly increased the yield of rice by 6.2％,while increasing the selenium content of brown rice and decreasing the cadmium content.Biochar application increased soil pH,organic matter content,quick-act-ing phosphorus and cation exchange capacity in line with increased biomass addition.Biochar application increased the content of soil selenium in its effective state while decreasing the content of soil cadmium in its effective state.The BC3 treatment increased the con-tent of soil selenium in its effective state by 118.3％and decreased the content of soil cadmium in its effective state by 20.2％.Biochar application increased the proportion of soil water-soluble and exchangeable selenium,while decreasing the proportion of soil Fe/Mn oxide-bound,and organic matter-bound,as well as residual selenium.The greatest effect was observed on water-soluble and exchangeable selenium,with coefficients of variation between treatments of 21.4％and 34.0％.Biochar application could transform soil cadmium forms into oxidisable and residual states.In summary,applying an appropriate amount of biochar can significantly in-crease rice yield and achieve the goals of rice selenium enrichment and cadmium reduction.BC2 is the most effective treatment for producing selenium-enriched,safe rice in selenium-contaminated farmland.关键词
生物炭/水稻/富硒高镉土壤/硒形态/镉形态Key words
biochar/rice/selenium-enriched and high-cadmium soil/selenium speciation/cadmium speciation分类
农业科技引用本文复制引用
韦文茵,路丹,龙海媛,李家瑜,索尔沁格,杨曙..生物炭对硒镉高背景区域稻田富硒水稻生产的影响[J].天津农业科学,2025,31(8):78-83,6.基金项目
2023年广西大学大学生创新创业训练自治区级项目(S202310593352) （S202310593352）
