烟草科技2019，Vol.52Issue(9)：10-16,7.
模拟降雨对烟叶重金属含量的影响
Effects of simulated rainfall on heavy metal accumulation in tobacco leaves
摘要
Abstract
In order to investigate the mechanism of rainfall on heavy metal accumulation in tobacco leaves, a series of parameters such as rainfall frequency, precipitation and pH of rainwater were studied via rainfall simulation experiments in fields and greenhouses. The results showed that washing with deionized water decreased the heavy metal accumulation in tobacco leaves collected from fields at different stages, the average reduction rates of As, Pb and Ni were 18.19%, 16.67% and 15.62%, respectively. The simulated rainfall experiments indicated that the heavy metal concentration and pH of rainwater and precipitation influenced the heavy metal accumulation in tobacco leaves. Taking the groundwater containing lower heavy metals as simulated rainwater, the results of field experiments indicated that rainfall frequency slightly affected the heavy metal accumulation in tobacco leaves at equal precipitation. At equal rainfall frequency, the accumulation of Cr, Ni, As and Pb in tobacco leaves decreased with the increase of precipitation. The results of rainfall simulation experiments in greenhouses suggested that when the Pb concentration in simulated rainwater was 10.0 μ g/L, the pH of rainwater and precipitation significantly affected the Pb accumulation in tobacco leaves, and the Pb accumulation in tobacco leaves and stalks increased at lower pH and higher precipitation.关键词
烟叶/重金属/模拟降雨/降雨量/降雨次数/雨水pHKey words
Tobacco leaf/Heavy metal/Simulated rainfall/Precipitation/Rainfall frequency/pH of rainwater分类
农业科技引用本文复制引用
王爱国,戴华鑫,杨欣,张仕祥,梁太波,张晓娟,张艳玲..模拟降雨对烟叶重金属含量的影响[J].烟草科技,2019,52(9):10-16,7.基金项目
中国烟草总公司科技重点项目"大气沉降对烟叶重金属的影响研究"(110201402019). （110201402019）
