摘要
采用模拟污染物的同位素示踪技术研究了客土覆盖对降低大豆和白菜 (尤其是作物的可食用部分 )中89Sr积累的效应 .结果表明客土覆盖能有效降低大豆和后茬白菜对89Sr的吸收和积累 ,当客土覆盖深度为 9cm时 ,豆籽、豆壳、豆秸和豆根中89Sr比活度分别下降了 82 8%、5 6 4%、3 8 7%和 66 5 % ,后茬白菜下降了 68 8% ;作物中吸收积累的89Sr比活度随客土覆盖深度的增加而下降 。
Effects of covering with new soil on reducing the accumulation of 89 Sr by soybean and Chinese cabbage (especially in the edible part of crop) were studied on simulated pollutants by using the isotope\|tracer techniques. The results showed that the absorption and accumulation of 89 Sr in the soybean and Chinese cabbage could be decreased significantly by covering soil polluted 89 Sr with new soil. The specific activity of 89 Sr in bean seed, bean hull, bean straw, bean root and Chinese cabbage were reduced by 82\^8%, 56\^4%, 38\^7%, 66\^5%and 68\^8% respectively when the depth of covering with new soil reached 9cm. The specific activity of absorption and accumulation 89 Sr in the crop decreased with depth of the new soil profile. The specific activity of 89 Sr in the crop follows a negative linear relation with depth of the new soil profile by analyzing the experiment data with linear regression method.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2002年第4期126-128,共3页
Environmental Science
基金
浙江省"九五"重点科技项目 (96 110 30 84 )
关键词
放射性锶
客土覆盖
作物
吸收
积累
降低率
核污染
radio\|strontium
covering with new soil
crop
absorption and accumulation
reduce ratio
