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应用生态学报 ›› 1993, Vol. 4 ›› Issue (4): 381-387.

• 研究论文 • 上一篇    下一篇

黄土区土壤放射性的生物循环

张钟先2, 王农1, 郝玉怀1, 刘普灵1   

  1. 1. 中国科学院西北水土保持研究所, 陕西杨陵 712100;
    2. 福建农业科学院中心实验室
  • 收稿日期:1991-06-24 修回日期:1992-10-29 出版日期:1993-10-25 发布日期:1993-10-25

Biocycle of soil radioactivity in loess area

Zhang Zhongxian2, Wang Nong1, Hao Yuhuai1, Liu Puling1   

  1. Northwestern Institute of Soil and Water Conservation, Academia Sinica, Yangling 712100
  • Received:1991-06-24 Revised:1992-10-29 Online:1993-10-25 Published:1993-10-25

摘要: 研究了不同类型土壤中放射性物质的生物学循环和平衡问题。结果表明,土壤中放射性核素剖面分布的总趋势是沿发生层往下逐步减少。其生物积聚系数因不同核素而变动在1.06—1.44间。放射性物质在各类植物体内的含量顺序是:牧草>农业作物≥灌木≥果树>乔木。植物对α放射性的富集系数一般均小于0.10,而β放射性的富集系数大都处于0.5—1.0间.不同土地利用情况下土壤放射性可分为积累、消耗和中间3种平衡类型。

关键词: 土壤放射性, 生物循环, 老化, 有效态砷, As(Ⅲ), 结合态砷

Abstract: Biocycle and equilibrium of radioactive substances in different soils are studied in this paper. The results show that the content of radionuclides in soil profile decreases gradually along with genetic horizons. The biological accumulation coefficients of different nuclides range from 1.06 to 1.44, and the content of radioactive substances in different plants is in order of fodder grass>crop≥shrub≥fruit tree>arbor. The concentration coefficient of plants for α radioactivity is less than 0.10 and that for β radioactivity is 0.5-1.0. Three equilibrium types(accumulation, consumption and medium) of soil radioactivity under different land utilizations are put forward.

Key words: Soil radioactivity, Biocycle, arsenite, aging, available As, combined As.