| 成县石灰性土壤金属镉背景值调查 |
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| 引用本文： | 杨兴宏.成县石灰性土壤金属镉背景值调查[J].安徽农业科学,2016,44(16):137-138. |
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| 作者姓名： | 杨兴宏 |
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| 作者单位： | 陇南师范高等专科学校,甘肃陇南,742500 |
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| 摘 要： | 目的]调查成县石灰性土壤重金属镉含量的背景值,为石灰性土壤镉污染评价提供参考。方法]采集成县30个地块,每个地块采集0~20和20~40 cm土层土样,采用DTPA浸提–原子吸收分光光度法测定土壤中可给态镉含量。结果]0~20 cm土层土壤的可给态镉含量平均为2.48 mg/kg,变动范围2.23~2.73 mg/kg(95%可靠度)或者2.15~2.81 mg/kg(99%可靠度);20~40 cm土层土壤的可给态镉含量平均为2.43 mg/kg,变动范围是2.23~2.63 mg/kg(95%可靠度),或者2.16~2.70 mg/kg(99%可靠度)。结论]0~20 cm土层土壤镉含量污染的临界值为2.81 mg/kg,20~40 cm土层土壤镉含量污染的临界值为2.70 mg/kg。
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| 关 键 词： | 石灰性土壤 镉污染 背景值 临界值 成县 |
Investigation on Cadmium Background Value in Calcareous Soil in Cheng County |
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| Abstract: | Objective] To investigate the cadmium background value in calcareous soil in Cheng County, and to provide references for the cadmium pollution evaluation in calcareous soil. Method] A total of 30 land plots were selected from Cheng County. Samples at 0-20 and 20-40 cm soil layers were collected from each plot. The available cadmium content in soil was detected by DTPA extraction - atomic absorp-tion spectrophotometry. Result] The average content of available cadmium in 0-20 cm soil layer was 2. 48 mg/kg;the variation range was 2. 23-2. 73 mg/kg (95% reliability) or 2. 15-2. 81 mg/kg (99% reliability). The average content of available cadmium in 20-40 cm soil layer was 2. 43 mg/kg, the variation range was 2. 23-2. 63 mg/kg(95% reliability) or 2. 16-2. 70 mg/kg (99% reliability). Conclusion] Critical value of cadmium content pollution in 0-20 and 20-40 cm soil layers are 2. 81 and 2. 70 mg/kg, respectively. |
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| Keywords: | Calcareous soil Cadmium pollution Background value Critical value Cheng County |
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