摘要
富硒土壤是发展富硒产业的前提条件。以浔郁平原1∶50 000土地质量地球化学调查和多年定位试验结果为基础,分析了浔郁平原富硒土壤比例,并初步探讨了富硒土壤成因及影响因素。结果表明,浔郁平原的覃塘、桂平、平南和港南等4个县(市、区)的土壤硒含量明显高于全国平均水平(0.29 mg/kg),最高的覃塘区达到0.77 mg/kg。覃塘、桂平、平南3区县硒含量≥0.4 mg/kg的土壤均超过50%,其中覃塘区高达88.5%。桂平市的土壤对成土母质硒元素具有明显的继承性。土壤pH与土壤硒呈明显负相关关系,pH<5的土壤硒含量高达0.58mg/kg。林地、草地、果园和水田的土壤硒含量依次降低,水田土壤硒含量只有林地的65.45%。因此,浔郁平原土壤硒资源丰富,成土母质、土地利用方式及土壤pH是影响土壤硒水平的重要因素。
Selenium(Se)-rich soil is the precondition of selenium-rich industry. Based on the 1︰50 000 geochemical survey of soil environmental quality and long-term positioning observation, the proportion of Se-rich soil and the causes and influential factors of Se-rich soils in Xunyu plain were studied. The results showed that soil Se contents in Qintang, Guiping, Pingnan and Gangnan were higher than national average(0.29 mg/kg). Se content in Qintang was the highest(0.77 mg/kg). The proportion of the soils with Se content more than 0.4 mg/kg in Qintang, Guiping and Pingnan all exceeded 50%, highest in Qingtang(88.5%). Topsoil Se in Guiping was mainly inherited from parent material. Soil Se content was negatively related to pH. Se contents reached 0.58 mg/kg in soils with pH<5. Soil Se content was in an order of forest land > grassland > garden plot > paddy field. Soil Se content in paddy field was 65.45% of the forest land. These results indicate that the soils in the Xunyu plain are rich in Se, soil parent material, land use type and soil pH are important influential factors on soil Se content.
作者
刘永贤
陈锦平
潘丽萍
吴天生
杨彬
邢颖
廖青
梁潘霞
江泽普
LIU Yongxian;CHEN Jinping;PAN Liping;WU Tiansheng;YANG Bin;XING Ying;LIAO Qing;LIANG Panxia;JIANG Zepu(Agricultural Resources and Environment Research Institute,Guangxi Academy of Agricultural Sciences/Selenium Enriched Agriculture Research Center of Guangxi,Nanning 530007,China;Geological Survey Institute of Guangxi,Nanning 530023,China;Leading Group Office for Se-enrichedAgricultural Products R&D,Guigang,Guangxi 537100,China)
出处
《土壤》
CAS
CSCD
北大核心
2018年第6期1139-1144,共6页
Soils
基金
广西科技重大专项项目(桂科AA17202026)
广西重点研发计划项目(桂科AB16380207)
广西农业重点科技计划项目(201604)
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项目(桂农科2017YZ03)
广西农业科学院科技发展基金项目(2017JM07)资助
关键词
浔郁平原
富硒土壤
成因
PH
Xunyu plain
Selenium-rich soil
Causes
pH
