坡面植物生长期内对~7Be的截留吸收及影响因素分析

对坡面植物在生长期内7Be含量的动态变化进行研究,发现随着生长植物在生长期内7Be含量增加,单位面积上植物截留吸收7Be量增加;研究区坡面7Be的植被截留吸收率为3.35%~8.44%,说明植被覆盖对土壤中7Be含量有重要的影响。同时还发现,不同采样间隔期7Be日均增量不定,在整个采样期内变异性大,变异系数为0.69,但从春季到夏季的前4个采样间隔期变异性相对较小;不同采样间隔期7Be日均增量和日均降雨量呈正比,相关系数为0.64。

Different plants on slope were collected and 7Be activity in plants was detected.The results showed that with the growth of plants,7Be activity in plants was increasing;7Be activity intercepted and absorbed by plants on slope per square meter was also increasing and reached the maximum in autumn.The percentage of 7Be intercepted and absorbed by plants was 3.35%-8.44%,which indicated that the 7Be interception-absorption by plants obviously impacted on the 7Be activities in soil.The data also showed that dail...