浔郁平原富硒土壤成因及其影响因素研究
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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.
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.
引文
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[31]El-Ramady H,Abdalla N,Alshaal T,et al.Selenium in soils under climate change,implication for human health[J].Environmental Chemistry Letters,2015,13(1):1-19
[32]王五一,王大成,王卫中,等.我国土壤中硒的淋溶[J].地理研究,1992,11(2):34-40
[33]黄春雷,宋明义,魏迎春.浙中典型富硒土壤区土壤硒含量的影响因素探讨[J].环境科学,2013,34(11):4405-4410
[34]Li J,Peng Q,Liang D,et al.Effects of aging on the fraction distribution and bioavailability of selenium in three different soils[J].Chemosphere,2016,144:2351-2359
[35]Ravi S,Breshears D D,Huxman T E,et al.Land degradation in drylands:Interactions among hydrologicaeolian erosion and vegetation dynamics[J].Geomorphology,2010,116(3/4):236-245
[36]Guignardi Z,Schiavon M.Biochemistry of plant selenium uptake and metabolism[M]//Pilon-Smit S E,Winkel L,Lin Z Q.Selenium in plants.Cham,Switzerland:Springer,2017:21-34
[37]Bailey R T.Selenium contamination,fate,and reactive transport in groundwater in relation to human health[J].Hydrogeology Journal,2017,25(4):1191-1217
[2]Steinnes E.Soils and geomedicine[J].Environmental Geochemistry and Health,2009,31(5):523-535
[3]Rayman M P.Food-chain selenium and human health:Emphasis on intake[J].British Journal of Nutrition,2008,100(2):254-268
[4]Durán P,Acu?a J J,Jorquera M A,et al.Enhanced selenium content in wheat grain by co-inoculation of selenobacteria and arbuscular mycorrhizal fungi:Apreliminary study as a potential Se biofortification strategy[J].Journal of Cereal Science,2013,57:275-280
[5]王锐,余涛,曾庆良,等.我国主要农耕区土壤硒含量分布特征,来源及影响因素[J].生物技术进展,2017,7(5):359-366
[6]李杰,杨志强,刘枝刚,等.南宁市土壤硒分布特征及其影响因素探讨[J].土壤学报,2012,49(5):1012-1020
[7]戴慧敏,宫传东,董北,等.东北平原土壤硒分布特征及影响因素[J].土壤学报,2015,52(6):1356-1364
[8]魏复盛,杨国治,蒋德珍,等.中国土壤元素背景值基本统计量及其特征[J].中国环境监测,1991,7(1):1-6
[9]中国环境监测总站.中国土壤元素背景值[M].北京:中国环境科学出版社,1990
[10]秦海波,朱建明.中国典型高硒区硒的环境地球化学研究进展[J].生物技术进展,2017,7(5):367-373
[11]邓萍.广西几多”硒”,再摸”富”家底--我区对”长寿元素”硒开展再调查纪事[N].广西日报,2014-01-15:011
[12]覃勇新,陈彪.广西贵港地区富硒土壤地球化学特征及成因探讨[J].南方国土资源,2013(8):36-37
[13]中华人民共和国国土资源部:地球化学普查规范(1:50 000):DZ/T 0011-2015[S].北京:中国标准出版社,2015
[14]徐聪,刘媛媛,孟凡乔,等.农产品硒含量及与土壤硒的关系[J].中国农学通报,2018,34(7):96-103
[15]Salhani N,Boulyga S F,Stengel E.Phytoremediation of selenium by two helophyte species in subsurface flow constructed wetland[J].Chemosphere,2003,50(8):967-973
[16]谭见安.中华人民共和国地方病与环境图集[M].北京:科学出版社,1989:39
[17]李家熙.人体硒缺乏与过剩的地球化学环境特征及其预测[M].北京:地质出版社,2000
[18]Tan J,Zhu W,Wang W,et al.Selenium in soil and endemic diseases in China[J].Science of the Total Environment,2002,284(1/2/3):227-235
[19]郭宇.恩施地区硒的地球化学研究及富硒作物栽培实验研究[D].北京:中国地质大学,2012
[20]王浩东,张建东,谢娟平,等.安康地区土壤硒资源分布规律研究[J].安康学院学报,2013,25(6):8-11
[21]何邵麟,陈武,莫春虎,等.贵州乌蒙山区土壤-农作物体系硒-锌分布特征研究[J].生物技术进展,2017,7(5):557-562
[22]赵少华,宇万太,张璐,等.环境中硒的生物地球化学循环和营养调控及分异成因[J].生态学杂志,2005,24(10):1197-1203
[23]陈俊坚,张会化,余炜敏,等.广东省土壤硒空间分布及潜在环境风险分析[J].生态环境学报,2012,21(6):1115-1120
[24]王子健.中国低硒带生态环境中硒的环境行为研究进展[J].环境化学,1993,12(3):237-243
[25]王美珠,章明奎.我国部分高硒低硒土壤的成因初探[J].浙江农业大学学报,1996,22(1):89-93
[26]Sun G X,Meharg A A,Li G,et al.Distribution of soil selenium in China is potentially controlled by deposition and volatilization?[J].Scientific Reports,2016,6:20953
[27]朱发庆,谭见安.我国降水、降尘中硒、碘、氟的研究[J].环境科学学报,1988(4):428-437
[28]孙国新,李媛,李刚,等.我国土壤低硒带的气候成因研究[J].生物技术进展,2017,7(5):387-394
[29]童建川.重庆紫色土区硒分布特征研究[J].西南师范大学学报:自然科学版,2016,41(3):170-175
[30]Jones G D,Droz B,Greve P,et al.Selenium deficiency risk predicted to increase under future climate change[J].Proceedings of the National Academy of Sciences,2017,114(11):2848-2853
[31]El-Ramady H,Abdalla N,Alshaal T,et al.Selenium in soils under climate change,implication for human health[J].Environmental Chemistry Letters,2015,13(1):1-19
[32]王五一,王大成,王卫中,等.我国土壤中硒的淋溶[J].地理研究,1992,11(2):34-40
[33]黄春雷,宋明义,魏迎春.浙中典型富硒土壤区土壤硒含量的影响因素探讨[J].环境科学,2013,34(11):4405-4410
[34]Li J,Peng Q,Liang D,et al.Effects of aging on the fraction distribution and bioavailability of selenium in three different soils[J].Chemosphere,2016,144:2351-2359
[35]Ravi S,Breshears D D,Huxman T E,et al.Land degradation in drylands:Interactions among hydrologicaeolian erosion and vegetation dynamics[J].Geomorphology,2010,116(3/4):236-245
[36]Guignardi Z,Schiavon M.Biochemistry of plant selenium uptake and metabolism[M]//Pilon-Smit S E,Winkel L,Lin Z Q.Selenium in plants.Cham,Switzerland:Springer,2017:21-34
[37]Bailey R T.Selenium contamination,fate,and reactive transport in groundwater in relation to human health[J].Hydrogeology Journal,2017,25(4):1191-1217