摘要
以金粒管富集气汞法研究了蔬菜地、农田、果园、林地等植被类型的近地面气汞的分布特性。结果表明 ,在近地面 0cm ,5 0cm ,10 0cm ,15 0cm 4个层次的气汞浓度平均值菜地以 5 0cm层次气汞浓度最高 ,显著高于贴地面的气汞浓度 ;油菜地、果园及林地的气汞浓度峰值出现在植物枝叶密集分布层上部的一定范围内 ;夜间近地面气汞浓度却表现为近地面 0cm ,5 0cm层次低于 10 0cm以上层次的气汞浓度 ;降雨可降低气汞浓度 。
Vertical distribution of air-Hg above vegetable gardens,farmland,orchards and woodland was studieds with the gold-pipe air-Hg accumulation method.Air-Hg was determined at 0,50,100 and 150 cm above the ground,and its concentration over the vegetable garden was found to be the highest at the 50-cm layer,significantly higher than that at the 0-cm layer.Over the rapeseed field,fruit tree orchard and woodland,the highest concentration of air-Hg appeared somewhere in the canopy of the plants.During the night,the mean concentration of air-Hg was lower at the 0-cm and 50-cm layers than at the 100-cm and 150-cm layers.Rainfall reduced air-Hg concentration,but brought about no change in the distribution pattern of air-Hg.
出处
《西南农业大学学报（自然科学版）》
CSCD
北大核心
2001年第1期39-41,共3页
Journal of Southwest Agricultural University
基金
国家教委博士点基金资助! (970 60 1 )
