摘要
基于宣恩县李家河镇蜜柑白柚产地土壤地球化学调查数据,研究各介质元素含量特征,并依据相应评价规范进行了土壤质量综合评价,探讨其元素生态效应。结果表明:与全国土壤背景值相比,B、F、Se、Cd等12种元素含量显著偏高,而有机质与S、P、K_(2)O等8种元素含量显著偏低,而与宣恩县土壤背景值相比,仅SiO_(2)含量偏高外,其余元素含量或指标均偏低。有效硼、有效镁和有效磷含量处于较缺乏水平,碱解氮和速效钾处于中等水平,其余元素有效态含量大多处于丰富水平。土壤养分主要处于较缺乏水平,土壤环境质量以清洁为主,影响土壤环境地球化学综合等级的元素主要是Cd元素;产地土壤质量综合评价以中等等级为主,其次为差等土壤、劣等土壤,分布在研究区西部的北东-南西向条带上,与区域构造形迹一致,为二叠系地层中黑色岩系影响区。土壤垂直剖面和水平剖面皆显示产区养分元素分布与人类活动的影响有关。产地蜜柑、白柚果实中硒、锌、锗有益元素含量相近,蜜柑中锶含量远超于白柚中锶含量,且两者未受土壤Cd元素污染影响,食用安全。
This study was based on soil geochemical survey data obtained in the producing area of Citrus unshiu and white pomelo in Lijiahe Town,Xuanen County.The content characteristics of element in each medium was studied,The com⁃prehensive evaluation of soil quality was carried out according to the corresponding evaluation standards,and the ecological effects of the elements were discussed.The results showed that 12 elements such as B,F,Se and Cd were slightly higher,while 8 elements such as organic matter,S,P and K_(2)O were significantly lower than the background values of A layer in Chinese soil.The contents of available boron,available magnesium and available phosphorus were in the low level,alkali hydrolyzable nitrogen and available potassium were in the medium level,and the available amount of other elements were mostly in the rich level.The soil nutrients were mainly at a scarce level,while the soil environmental quality were mainly clean,and the element which affecting the comprehensive level of soil environmental geochemistry was mainly Cd.The comprehensive evaluation of soil quality in the producing area was mainly medium grade,followed by poor soil and inferior soil,which were distributed in the NE-SW belt in the western of the study area,consistent with the regional tectonic trace,which was the affected area of the black rock series in the Permian strata.Both vertical and horizontal soil profiles showed that the distribution of nutrient elements in producing areas was related to the influence of human activities.The beneficial contents of selenium,zinc and germanium in Citrus unshiu and white pomelo fruits from the producing area were similar.The content of Sr in Citrus unshiu is far higher than that in white pomelo,and both of them are not affected by soil Cd pollution,so it is safe to eat.
作者
夏伟
李春诚
王芳
王雯雯
汪丹
徐春燕
赵敏
孙奥
XIA Wei;LI Chuncheng;WANG Fang;WANG Wenwen;WANG Dan;XU Chunyan;ZHAO Min;SUN Ao(Hubei Institute of Geosciences,Wuhan 430034,China;Hubei Center of Selenium Ecological Environment Effect Detection,Wuhan 430034,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2022年第S01期72-80,共9页
Environmental Science & Technology
基金
湖北省地质局科技项目(KJ2022-2,KJ2021-24)
湖北省自然资源厅2021年度耕保项目(HBECC-ZB-ZC21055)
恩施州土地质量地球化学评价暨土壤硒资源普查项目(ESXPC201905)
关键词
“宣恩早”蜜柑
贡水白柚
产地
土壤特征
生态效应
“Xuanen early”Citrus unshiu
Gongshui white pomelo
producing area
soil geochemical characteristics
ecological effects
