Characteristics and Influencing Factors of Soil Selenium Content in Fengyan Paddy Field in Hanyin
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摘要: 以安康市汉阴县漩涡镇凤堰水田区土壤为研究对象，采集表层0~20 cm土壤、水稻籽实及根系土样品，测试分析土壤、水稻籽实中Se及重金属元素的含量、根系土中Se的形态；研究土壤Se含量特征及其影响因素，得出以下结论：①土壤Se含量介于0.11~0.4 mg/kg，Se形态以残渣态、腐殖酸结合态、强有机结合态为主，93.4%的土壤Se含量处于适量水平；水稻籽实中Se含量介于0.01~0.11 mg/kg，62%的水稻达到富硒标准。②成土母质、土壤类型和种植制度的不同，会造成土壤中Se含量的差异。Abstract: Taking the soil in the paddy field area of Fengyan, Xuanwo Town, Hanyin County, Ankang City as the research object, Samples of 0-20cm surface soil, rice seed and root soil were collected to test and analyze the content of selenium and heavy metal elements in the soil, rice seed and the content of selenium in root soil Form, study the characteristics of soil selenium content and influencing factors, and draw the following conclusions:(1) The selenium content in the soil is between 0.11~0.4mg/kg. The selenium form is mainly in the residue state, the humic acid combined state, and the strong organic combined state. The selenium content of 93.4% of the soil is at an appropriate level; the selenium content in the rice seeds is between Between 0.01 and 0.11 mg/kg, 62% of the rice reaches the selenium-enriched standard. (2) Differences in soil parent materials, soil types, and planting systems will cause differences in the selenium content in the soil.
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Key words:
- Fengyan paddy field /
- rice seed /
- selenium forms /
- soil parent material
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