淹水灌溉协同钝化剂对水稻Cd吸收和积累的影响  

Effects of flooding irrigation combined with passivators on Cd uptake and accumulation in rice

作　　者：李畅 曾鹏 杨文 冯奕康 张玥 王德正 辜娇峰 廖柏寒 周航 LI Chang;ZENG Peng;YANG Wen;FENG Yikang;ZHANG Yue;WANG Dezheng;GU Jiaofeng;LIAO Bohan;ZHOU Hang(College of Environmental Science and Engineering,Central South University of Forestry and Technology,Changsha 410004,China;Hunan Provincial Key Laboratory of Wetland and Soil Ecological Remediation,Changsha 410004,China;Hunan Provincial Engineering Laboratory of Rice Quality and Safety Control,Changsha 410004,China;Zhongfang Agriculture and Rural Bureau,Huaihua 418005,China)

机构地区：[1]中南林业科技大学环境科学与工程学院,长沙410004 [2]湿地与土壤生态修复湖南省重点实验室,长沙410004 [3]稻米品质安全控制湖南省工程实验室,长沙410004 [4]怀化市中方县农业农村局,湖南怀化418005

出　　处：《农业环境科学学报》2024年第3期535-542,共8页Journal of Agro-Environment Science

基　　金：湖南省重点研发计划项目(2021NK2027);湖南省自然科学基金项目(2021JJ31159)。

摘　　要：在严格管控区Cd污染稻田开展田间试验,探讨淹水灌溉协同石灰和土壤调理剂对土壤Cd的有效性,以及水稻Cd吸收和累积的影响。结果表明:淹水灌溉协同钝化修复技术可有效降低土壤Cd的有效性和水稻Cd的吸收和积累。淹水灌溉协同石灰和调理剂处理下,土壤pH值较对照显著(P<0.05)提高0.97个单位,且土壤有效态Cd含量以及水稻根、茎和叶片Cd含量较对照分别显著(P<0.05)降低36.4%、63.0%、80.3%和42.4%,糙米Cd含量降至0.15 mg·kg^(-1)。淹水灌溉协同石灰和调理剂处理还显著抑制Cd向糙米部位的累积。糙米Cd的富集系数和Cd累积量较对照分别显著(P<0.05)降低67.8%和62.8%。因此,淹水灌溉协同土壤钝化修复技术是一种有效实现Cd污染稻田水稻安全生产的措施。A field experiment was conducted in a strictly controlled area of a soil cadmium(Cd)-contaminated paddy field to investigate the effects of flooding irrigation combined with lime and soil passivators on the availability of Cd in soil,Cd uptake,and accumulation in rice.The results showed that flooding irrigation combined with passivators could effectively reduce Cd availability in the soil and Cd uptake and accumulation in rice.The soil pH under the treatment of flooding irrigation combined with lime and soil passivators was increased by 0.97 units relative to the control,while the soil available Cd content,as well as the Cd content in roots,stems and leaves of rice were decreased by 36.4%,63.0%,80.3%,and 42.4%,respectively.The treatment of flooding irrigation combined with lime and soil passivators reduced the content of Cd in brown rice to 0.15 mg·kg^(-1).Furthermore,the Cd accumulation in brown rice was significantly inhibited by the flooding irrigation combined with the lime and soil passivator treatment.Compared to the control,the Cd bioconcentration factor and total Cd accumulation in brown rice decreased by 67.8% and 62.8%,respectively.Therefore,flooding irrigation combined with passivators was an effective measure to achieve rice safety production in the Cd-contaminated rice fields.

关 键 词：土壤CD污染 水稻 安全利用 淹水灌溉 钝化修复 

分 类 号：S511[农业科学—作物学] X53[环境科学与工程—环境工程]