农业环境科学学报2025，Vol.44Issue(5)：1199-1207,9.DOI:10.11654/jaes.2024-0552
鲜食玉米籽粒镉累积关键影响因子及其影响途径
Key influencing factors and pathways of cadmium accumulation in fresh maize grains:based on Random Forest model
摘要
Abstract
In order to explore the key influencing factors and influencing pathways of cadmium(Cd)content in maize grains,In this study,fresh maize planted in Cd polluted area of Quzhou City,Zhejiang Province and the corresponding soil were taken as the research object.The influence factors of soil(pH,available Cd,total Cd)and plant(Cd content in each organ,Cd translocation factors and varieties)were analyzed by Random Forest(RF)model.The results showed that soil pH was negatively correlated with grain Cd content,while other variables were positively correlated with Cd content.The variance explained by the predictive model based on cross-validation(VECV)in RF model explained 75.65％of the variation of Cd content in maize grains.The importance of influencing factors on the Cd content in maize grains was as follows:TFcob-grain＞variety＞stem Cd＞root Cd＞BCF＞husk Cd(plant factor);Soil pH＞soil available Cd＞soil total Cd(soil factor).Path analysis showed that soil pH and soil total Cd directly affect the content of available Cd in soil,thereby indirectly affecting the absorption of Cd by maize and the migration and transport of Cd in the above-ground part of the plant,and finally affecting the content of Cd in maize grains.Stem Cd,leaf Cd and cob Cd together explained 47％of the Cd content in maize grains,and the prediction ability of the model was 45.57％(Goodness of fit=0.455 7).In conclusion,soil pH,translocation ability for Cd and variety are the most important factors affecting maize grain Cd.关键词
玉米/镉/随机森林/影响因素Key words
maize/cadmium/Random Forest/influencing factor分类
农业科学引用本文复制引用
王亚楠,刘迎夏,马进川,马军伟,褚军杰,王强,邹平..鲜食玉米籽粒镉累积关键影响因子及其影响途径[J].农业环境科学学报,2025,44(5):1199-1207,9.基金项目
国家玉米产业体系项目(CARS-02-25) （CARS-02-25）
浙江省高层次人才项目(2021R52045)National Maize Industry System Project(CARS-02-25) （2021R52045）
High-level Talent Project of Zhejiang Province,China(2021R52045) （2021R52045）
