摘要:
本文在广东省多目标区域地球化学调查基础上,选取珠江三角洲地区主要土壤硒富集区进行研究。研究发现,珠三角地区表层土壤Se含量变化范围为0.102~1.866μ g/g,平均值为0.789μ g/g,总体上表现出山丘、坡地地区高于地势平坦地区,非耕作土Se含量高于耕作土,旱地Se含量高于水田的特征。不同农产品中Se含量与土壤Se含量有一定关系,但更大程度受Se的形态及各种环境因素的影响。适当添加石灰调节土壤pH值,可以显著提高部分农作物富硒水平,并且可以降低其对有害重金属元素的吸收率,能够产生可观的经济效益,为该地区富硒土壤的合理开发利用提供依据。
Abstract:
Based on the multi-purpose regional geochemical survey in Guangdong Province, soil selenium and selenium contents of plants in Pearl River Delta are analyzed in this paper. On the whole, the contents of Se of sloping hills area, non-tillage and dry land are higher than the flat area, cultivated soil and paddy field, respec-tively. The content of Se in different agricultural products is not only related to soil Se, but also influenced by the existence form of soil Se and various environmental. Appropriate lime, which can adjust the pH value of soil, can significantly improve the selenium level of some plants and reduce the absorptivity of harmful heavy metals. It will generate considerable economic benefits and provide the basis for reasonable development and utilization of sele-nium rich soil.
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