摘要
土壤作为硒的重要储库之一,是硒通过植物进入食物链的重要物质基础,因此土壤硒的丰缺是影响食用作物硒水平的关键。降雨在土壤硒输入和输出上扮演着重要角色,了解降雨对土壤硒的作用对于在全国尺度上认识硒的地域分布成因具有重要意义。结合国内外研究现状,通过比较我国东南富硒区和东北-西南典型低硒带硒的降雨沉降量差别,阐明降雨是土壤硒输入的一种重要途径。通过综述降雨对土壤硒的淋溶输出和生物有效性的影响,揭示降雨在我国低硒区形成、地方病发生上所扮演的角色。最后总结了影响降雨对土壤硒作用的自然和人为因素,包括气候、土壤、植物和人类活动等,指出若要更好地预测未来土壤硒的变化趋势,必须综合研究影响土壤硒迁移的多种作用过程。
As one of the important reservoirs of selenium(Se),soil is an important material basis for Se to enter the food chain through plants.The content of soil Se is therefore the key factor affecting the Se level of edible crops.Rainfall plays an important role in driving soil Se input and output.Elucidating the influence of rainfall on soil Se is essential to better understand the spatial distribution of soil Se at a national scale.Based on analysis of the latest researches in China and abroad,we found that rainfall is an important route for soil Se input,by comparing the Se input from wet deposition between the Se-rich area of Southeast China and the low-Se belt stretching from Northeast China to Southwest China.The role of rainfall in the formation of low-Se belt and endemic diseases was revealed by summarizing the impacts of rainfall on soil Se leaching loss and its bioavailability.Finally,we discussed the natural and artificial factors that influence the effects of rainfall on soil Se,such as climate,soil,plant and human activities.To better forecast the variation trend of soil Se in the future,it is necessary to synthetically study the multiple processes that govern soil Se migrations.
作者
陈锦平
刘永贤
曾成城
潘丽萍
邢颖
廖青
梁潘霞
江泽普
CHEN Jin-ping;LIU Yong-xian;ZENG Cheng-cheng;PAN Li-ping;XING Ying;LIAO Qing;LIANG Pan-xia;JIANG Ze-pu(Agricultural Resources and Environment Research Institute,Guangxi Academy of Agricultural Sciences/Selenium Enriched Agricultural Research Center of Guangxi,Nanning 530007,China)
出处
《生态学杂志》
CAS
CSCD
北大核心
2019年第6期1909-1915,共7页
Chinese Journal of Ecology
基金
广西科技重大专项(桂科AA17202026)
广西农业重点科技计划项目(201604)
广西重点研发计划项目(桂科AB16380207)
广西富硒特色作物试验站项目(桂TS2016011)
广西农业科学院基本科研业务专项(桂农科2017YZ03)
广西农业科学院科技发展基金(2017JM07)
南宁市青秀区重点研发计划项目(2016039)资助
关键词
硒沉降
淋溶
低硒带
地方病
Se deposition
leaching
low-Se belt
endemic disease
