不同生育期喷施硒肥对白菜硒镉吸收影响研究  

Study on Effect of Selenium Fertilizer Spraying on Absorption of Selenium and Cadmium in Chinese Cabbage at Different Growth Stages

作　　者：王丽[1] 蒋亚 刘桂华[1] 柴冠群 范成五[1] WANG Li;JIANG Ya;LIU Guihua;CHAI Guanqun;FAN Chengwu(Institute of Soil and Fertilizer,Guizhou Academy of Agricultural Sciences,Guiyang 550006)

机构地区：[1]贵州省农业科学院土壤肥料研究所,贵阳550006

出　　处：《中国农学通报》2024年第11期44-48,共5页Chinese Agricultural Science Bulletin

基　　金：贵州省土壤肥料研究所技术储备项目“硒镉伴生对蔬菜硒镉吸收影响研究”(黔土肥技术[2022]6号);贵州省土壤肥料研究所成果培育项目“富硒叶面调控材料研发与蔬菜富硒研究”(黔土肥成果[2022]2号);国家重点研发计划项目“石灰岩区砷镉污染农田修复与汞污染综合防治技术集成”(2018YFD0800602)。

摘　　要：为探究不同生育期喷施硒(Se)肥对白菜Se和镉(Cd)吸收的影响。通过田间试验,研究不同生育期喷施Se肥对Cd污染土壤白菜固Cd增Se及对外源Se利用指数的影响。结果表明:白菜幼苗期+莲座期+结球期(YM+LZ+JQ)喷施Se肥白菜地上部生物量显著高于其他喷施时期;不同生育期喷施Se肥均可降低白菜地上部和地下部Cd含量,在白菜苗期+莲座期+结球期连续喷施Se肥降Cd效果较为明显,同时白菜地上部、地下部Se含量显著高于其他喷施时期;白菜苗期+莲座期+结球期连续喷施Se肥白菜外源Se利用指数为2.63,显著高于其他喷施时期。综上,在白菜幼苗期+莲座期+结球期喷施Se肥降Cd增Se效果较好。To explore the effect of selenium fertilizer spraying on the absorption of selenium and cadmium in Chinese cabbage at different growth stages,field experiments were conducted to investigate the effects of selenium fertilizer spraying at various growth stages on the increase of selenium uptake from Cd-contaminated soil and the utilization index of exogenous Se in Chinese cabbage.The results showed that cabbage sprayed with selenium fertilizer at the seedling stage+rosette stage+head stage(YM+LZ+JQ)had significantly higher shoot biomass compared to other spraying stages.Continuous spraying of selenium fertilizer during the seedling stage+rosette stage+heading stage(YM+LZ+JQ)had a pronounced effect on reducing Cd content in the underground part of cabbage.Additionally,the Se content in both shoot and underground part of cabbage was significantly higher during this spraying period.The utilization index of exogenous Se in cabbage sprayed continuously with selenium fertilizer during the seedling stage+rosette stage+head stage(YM+LZ+JQ)was 2.63,significantly higher than that of other spraying periods.In conclusion,spraying selenium fertilizer during the cabbage seedling stage+rosette stage+head stage(YM+LZ+JQ)had a better effect on reducing Cd content and increasing Se content.

关 键 词：镉 白菜 生育期 硒肥 外源硒利用指数 

分 类 号：X53[环境科学与工程—环境工程]