贵州遵义地区硒在耕地土壤及农作物中的分布规律  

Enrichment of Selenium in Cultivated Soils and Crops in Zunyi,Guizhou

作　　者：魏泽权[1] 陈云明[1] 郭宇 任光明 WEI Ze-quan;CHEN Yun-ming;GUO Yu;REN Guang-ming(The 102th Geological Brigade,Geological and Mineralogical Bureau of Guizhou Province,Zunyi 563003,China)

机构地区：[1]贵州省地矿局102地质大队,贵州遵义563003

出　　处：《土壤通报》2021年第3期642-649,共8页Chinese Journal of Soil Science

基　　金：贵州省财政资金项目(黔地矿耕调2017-26);贵州省地矿局科研基金(黔地矿科合[2019]5号)资助。

摘　　要：利用贵州省耕地质量地球化学调查系统采集大量样品的契机,开展硒(Se)在耕地土壤及农作物有用器官中的分布规律研究。统计分析研究表明,遵义地区表层土壤绝大部分处于足Se和富Se水平,仅有极少部分属缺Se和高Se土壤;单就Se元素而言,整体属优质土壤。相关分析结果表明,土壤中Se含量与土壤有机质含量、海拔高度显著相关,受成土母岩岩性控制明显,土壤pH值<8.5时相关不明显,在>8.5时呈显著负相关关系。土壤中Se含量由地表往下逐渐降低,这可能是受各层土壤中有机质含量控制所致。农作物植株中Se含量主要因其器官部位及其生育阶段而不同。玉米、茶叶中的Se含量可能会受根系土Se含量影响。Taking advantage of the opportunity of collecting a large number of samples from the Guizhou Province Cultivated Land Quality Geochemical Survey System,conduct research on the distribution of selenium(Se)in cultivated land soil and useful organs of crops.Statistical analysis showed that most of the surface soils in Zunyi was at full or rich levels of Se,only a very small proportion of surface soils was at deficient or high levels of Se.The content of Se in the soil is significantly correlated with the content of soil organic matter and altitude.It is obviously controlled by the lithology of the soil-forming parent rock.The correlation is not obvious when the soil pH value is<8.5,and there is a significant negative correlation when the pH value is>8.5.The Se content was decreased vertically with soil depths,which may be controlled by the content of soil organic matter in each layer.The Se content in crop depended mainly on the organ and growth period of crop.The Se content in corn and tea may be affected by the Se content in root soil.

关 键 词：耕地土壤 农作物 SE 分布规律 遵义 贵州 

分 类 号：S147.2[农业科学—肥料学]