摘要
本文介绍小麦对^(134)Cs的吸收试验,结果表明,^(134)Cs在小麦中的比活度,根中最高,麦杆次之,麦粒最低。麸皮中^(137)Cs的比活度高于面粉。土壤对^(134)Cs的吸附能力,以青紫泥最强,红壤次之,小粉土最弱;土壤对^(134)Cs吸附能力的强弱与土壤的质地、PH和有机质含量有关。随着^(134)Cs施入土壤的延迟和施人次数的增加,小麦对^(134)Cs的吸收也增加。^(134)Cs在土壤中迁移很少,90.4％集中在0—3cm的表土层;^(134)Cs在土壤-小麦中的分配比为97.9％:2.1％;小麦对土壤中^(134)Cs的富集系数为1.75。
The roots of wheat can absorb 134Cs from irrigating water. The specific activity of 134Cs in the roots is the highest, in grains the lowest, and that in bran is higher than in flour. Absorption capacity of 134Cs by wheat varies with different kinds of soil. The order of absorption capacity is as follows: farinose clay>clay loam≥sandy loam. In addition, the absorption capacity of 134Cs in soils is different in soil texture, pH and organic matter; absorption amount of it varies with irrigating time, the closer to maturity stage, the more amount of 134Cs in wheat. Its migration in soil is very slow because there is 90.4% of 134C s concentrated in surface soil (0-3 cm). The ratio of 134Cs in wheat and in soil is 2.1% to 97.9%.
出处
《环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1990年第6期10-14,共5页
Environmental Science
