苯并［a］芘在土壤－水－水稻系统中传输动力学研究  

KINETIC STUDY ON TRANSPORT OF BaP IN SOIL-RICE SYSTEM

作　　者：李书鼎[1] 张少兰[1] 马吉春[1] 

机构地区：[1]中国科学院沈阳应用生态研究所,沈阳市环境监测中心站

出　　处：《生态学报》1995年第4期365-372,共8页Acta Ecologica Sinica

基　　金：国家自然科学基金

摘　　要：建立了ＢａＰ在土壤水稻系统中传输模型，并对其在系统各组分中的含量变化做了定量分析。实验求得了ＢａＰ在系统各相间传输速度常数和分配系数。揭示了水中ＢａＰ向水稻体传输路径和它们的速度大小。水稻从水中吸收ＢａＰ的速度比其从土壤中吸收的速度高４倍，水中ＢａＰ向土壤沉积速度比水稻从水中吸收ＢａＰ的速度高７倍。水中ＢａＰ在迁移到达水稻体之前，绝大部分被土壤牢牢吸附而很难被水稻吸收。his paper has established a transport model of BaP and analysed quantitatively the movement of the components in soil-rice system. Transported rate and distribution coeffi-cients of ￣(14)C-BaP between the systematic constituents are obtained empirically. Transportpaths and velocity of BaP to rice have been revealed. The BaP absorbing of rice from water is4 times higher than that from soil. Deposited velocity of BaP to soil in the water is 7 timesgreater than that the rice absorbing rate from water. A great number of BaP will be adsorbedby soil so that thev can not be assimilated the BaP reaches to rice in water.

关 键 词：土壤-植物系统 苯并(A)芘 传输 动力学 水稻 

分 类 号：S154.4[农业科学—土壤学] S511.101[农业科学—农业基础科学]