唐沫岚,范博伦,姚凌阳,安子怡,鲍征宇.土壤—作物系统中硒的地球化学特征及影响因素研究(代序2)[J].贵州地质,2020,37(4):417-424 |
土壤—作物系统中硒的地球化学特征及影响因素研究(代序2) |
Geochemical Characteristics and Impact Factors of Selenium in Soil-Crop Systems |
投稿时间:2020-09-02 |
DOI: |
中文关键词: 土壤-作物系统 地球化学特征 硒生物有效性 化学浸提 回归模型 |
英文关键词:Soil-crop system Geochemical characteristics Se bioavailability Chemical extraction Regression mode |
基金项目:地质调查标准化与标准制修订(2019-2021)子项目,富硒作物成分和硒形态分析标准物质研制(DD20190475)。 |
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中文摘要: |
硒是人体和动物必需的微量元素,而植物硒是人体摄入硒的重要来源。探究土壤-作物系统中硒的地球化学特征及其影响因素,从土壤地球化学的角度评价硒的生物有效性、进而建立富硒农作物模型具有重要意义。本文描述了世界和中国土壤中硒含量的分布情况,并从成土母质和土壤理化性质方面分析土壤中硒含量的影响因素。由于土壤中的硒形态是评价土壤硒生物有效性的关键,本文对土壤生物有效性硒的提取方法进行评述,且从土壤硒的赋存形态、土壤生物有效性硒的主控因素出发,探究土壤理化性质对农作物吸收硒的影响。此外,本文归纳总结了基于土壤理化性质的农作物硒含量回归模型,旨在分析农作物硒含量的主要影响因素,并以此预测农作物中的硒含量。 |
英文摘要: |
Selenium (Se) is an essential trace element for human and animals,and plant Se plays an important source of human Se intakeIt is of great significance to explore the geochemical characteristics and influencing factors of selenium in soil-crop system,to evaluate the Se bioavailability from the perspective of soil geochemistry,and to establish regression models of selenium in soil-crop systemsThis paper described the distribution of Se content in world and China,and analyzed the influencing factors of selenium content in soil from the aspects of parent material and soil physical and chemical propertiesAs the speciation and fractionation of Se in soil is the key to evaluate the soil Se bioavailability,this paper reviews the extraction methods of soil Se fractionation,and explores the effects of soil physical and chemical properties on crop Se uptake based on soil Se speciation and the main control factors of soil Se bioavailabilityIn addition,this paper summarized the regression models of crop Se content based on soil physical and chemical properties,aiming to analyze the main influencing factors of crop Se content and predict the Se content in crops |
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