| 高放废物处置系统地下水同位素特征 |
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| 关键词:isotope technique groundwater high-level waste repository |
| 基金项目:国家自然科学基金项目(4027204)，国防科技预研项目(55.6.23) |
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| 摘要: |
| Isotope Characteristics of Groundwater in the Potential Site of a High-Level Waste Repository in China |
| Using the data obtained from experiments conducted in pots, the authors analyzed the conditions of soil nutrient and the relationship between the carbon isotope discrimination in crop and the crop biomass under the condition of different soil nutrient contents. The research has reached the follow conclusions:The nutrient limitation factors are P, N, Mn and Zn, and the order of nutrient deficiency is P>Mn>Zn>N in Xiaojingzi farm soil in Jinchang. P and N fertilizers make up the limitation factors in Huli soil in Wuwei. In Baiyun soil of Wuwei, N, Zn and Mn are the limitation factors, with the order being N>Zn>Mn.The variations of δ 13C values of sorghum leaf and stem in three sorts of soils are as follows: compared with other treatments in these soils, the δ 13C values of OPT treatments are all the highest. The δ 13C values of sorghum in Xiaojingzi farm, Huli and Baiyu are -12.016‰,-12.26‰ and -12.305‰, respectively. These data suggest that under the optimal nutrient condition the plant grows sufficiently and the δ 13C is highest among all treatments. Among all the non-added ample nutrient treatments, the biomasses are dropping with the decreasing δ 13C values,and it seems that nutrient deficiency leads to the decrease of the crop biomass and the δ 13C values. In added treatments, the connection between crop biomass and carbon isotope discrimination is complex. |
| GUO Yong-hai,LIU Shu-fen,LV Chuan-he.2003.Isotope Characteristics of Groundwater in the Potential Site of a High-Level Waste Repository in China[J].Acta Geoscientica Sinica,24(6):525-528. |
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