摘要
[Objectives] In order to solve the problem of heavy metal pollution in paddy fields,field experiments were carried out to study the effect of Ca-Si soil conditioner on heavy metal remediation in paddy fields. [Methods] A conventional planting mode( CK) was used as the control,and a Ca-Si soil conditioner( Ca-Si) treatment was set to analyze the differences in soil pH and heavy metal contents in different treatments. [Results]The content of cadmium in the paddy field exceeded the soil pollution risk control value of agricultural land by 59. 33%. The Ca-Si soil conditioner increased the pH value of paddy field soil by 0. 58 unit. The fixation rates of Ca-Si soil conditioner on chromium,arsenic,cadmium and plumbum reached 75. 96%,14. 09%,18. 93% and 7. 81% compared with the CK,respectively,and the available cadmium and lead contents were reduced by 82. 35% and 80. 00%,respectively. [Conclusions]This study provides ideas and references for the remediation of heavy metal pollution in paddy soil.
基金
Supported by Natural Science Foundation of Guangdong Province(2018A030307075)
Special Fund for Science and Technology Innovation Strategy of Guangdong Province(135-99000206,432-99000228)
Science and Technology Planning Project of Shaoguan City(2018sn038)
School-level Project of Shaoguan University(SY2016KJ04)
Undergraduate Innovation and Entrepreneurship Project(Sycxcy2017-041,201810576009)。
