石嘴山地区碱性土壤硒地球化学特征及生物有效性
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Geochemical characteristics and bioavailability of selenium in alkaline soil in Shizuishan area, Ningxia
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图2. 石嘴山地区土壤有效硒含量分布特征 |
Fig.2. Distribution characteristics of soil available selenium content in Shizuishan area |
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