锶-89在土壤中淋溶和迁移的研究

采用微土芯装置研究了~(89)Sr在淹水土壤中的淋溶和垂直迁移。结果表明:1.通过18cm土柱后的淋溶水中~(89)Sr含量甚微:青紫泥约占标记量 0.2％,小粉土约占 0.3％,红黄壤约2.4％。2.滞留于土壤中的~(89)Sr,一半以上残存于表层2cm内:青紫泥67.4％,小粉土65.7％,红黄壤 55.1％。3.土壤中~(89)Sr-Sr含量随土壤深度按指数规律衰减:青紫泥 C_3=892.93 e~(-0.5073 x),小粉土C_1=498.96 e~(-0.3365 x),红黄壤C_2=341.29 e~(-0.1924 x);就随深度衰减速率而言,青紫泥>小粉土>红黄壤。

Wang Shouxiang, Zhang Yongxi, Hu Bingming & Huang Dan ( Zhejiang Agricultural Uni-versity, Hangzhou 310029 )

The leaching and vertical moving of strontium-89 in flood soil were studied by micro-soil installation. The result showed that, 1. The content of strontium-89 was very little after passing through 18 cm soil column, and the amount ot 89Sr in leachate of paddy soil ( loamyclay) was about 0.2% of labelled amount, paddy soil ( silty loam)--0.3%, and red-yellowearth--2.4%. 2. More than half of strontium-89 mained in the 2 cm upper layer soils: the paddysoil with loamy clay texture is 67.4%, paddy soil with silty loam texture is 65.7%, and red-yellow earth is 55.1%. 3. The content of strontium-89 will be altenuated by the law of index number with the depth of the soils: the paddy soil ( loam clay ) is C3 = 892.93e-0.5073x, the paddy soil ( silty loam) is C1=498.96e-0.3365x, and the red-yellow earth is C2 = 341.29e-0.1924x. Therefore, as ne-gards the speed of depth attenuation, paddy soil (loamy clay) paddy soil ( silty loam) and red-yellow earth were in due order.