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硒与黄腐酸组配对水稻镉吸收的影响
引用本文:刘波,黄道友,周建利,朱奇宏,龙世方,许超,王帅.硒与黄腐酸组配对水稻镉吸收的影响[J].水土保持学报,2019,33(2):350-355,362.
作者姓名:刘波  黄道友  周建利  朱奇宏  龙世方  许超  王帅
作者单位:1. 长江大学农学院, 湖北 荆州 434025;2. 中国科学院亚热带农业生态研究所, 亚热带农业生态过程重点实验室, 长沙 410125
基金项目:公益性(农业)行业专项(201403015);湖湘青年英才项目(2017RS3057);国家自然科学基金项目(41877138)
摘    要:以Cd污染水稻土为研究对象,采用盆栽试验研究不同用量Se(0.5,1.0 mg/kg)与黄腐酸(0.6,1.2 g/kg)组配对水稻吸收积累镉的影响,并探讨其作用机理,以期为Cd污染稻田的安全利用提供科学依据。结果表明:单施Se可使土壤pH提高0.08~0.23个单位,土壤CaCl_2提取态Cd含量降低8.6%~20.9%,水稻地上部各器官Cd含量显著降低29.4%~39.5%,单施Se能有效降低水稻吸收Cd,并阻控Cd向地上部以及籽实中的转运。单施黄腐酸能显著降低土壤pH,但对土壤CaCl_2—Cd含量、水稻各器官Cd和Se含量(除低量黄腐酸处理叶片和糙米Cd含量外)及水稻各器官Cd的分配无显著影响。Se与黄腐酸组配对土壤pH的影响取决于二者的用量,黄腐酸与高量Se组配处理显著降低CaCl_2提取态Cd 16.5%~21.9%。Se与黄腐酸组配处理能显著减少水稻Cd的吸收及向地上部和籽粒的转运,更为有效地降低稻米Cd含量,高量Se与黄腐酸组配的2个处理与对照相比,稻米Cd含量分别降低38.1%和50.2%。总体来看,施Se能有效降低稻米Cd含量,而Se与黄腐酸配合施用降Cd效果更佳。

关 键 词:  黄腐酸    水稻
收稿时间:2018/9/11 0:00:00

Effects of Combined Application of Selenium and Fulvic Acid on Cadmium Accumulation in Rice
LIU Bo,HUANG Daoyou,ZHOU Jianli,ZHU Qihong,LONG Shifang,XU Chao,WANG Shuai.Effects of Combined Application of Selenium and Fulvic Acid on Cadmium Accumulation in Rice[J].Journal of Soil and Water Conservation,2019,33(2):350-355,362.
Authors:LIU Bo  HUANG Daoyou  ZHOU Jianli  ZHU Qihong  LONG Shifang  XU Chao  WANG Shuai
Institution:1. College of Agriculture, Yangtze University, Jingzhou, Hubei 434025;2. Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125
Abstract:Taking Cd contaminated rice soil as the research object, a pot experiment was conducted to study the effects of various combination application of selenium (Se, 0.5 and 1.0 mg/kg) and fulvic acid (FA, 0.6 and 1.2 g/kg) on the uptake and accumulation of cadmium (Cd) in rice and the mechanism, and to provide a scientific basis for the safe utilization of rice contaminated by Cd. The results showed that single application of Se increased soil pH by 0.08 to 0.23 units, reduced CaCl2 extractable Cd in soil by 8.6% to 20.9%, decreased the concentration of Cd in aboveground organs of rice by 29.4% to 39.5%. Additionally, single application of Se could effectively reduce the accumulation of Cd in rice and inhibited the translocation of Cd to above ground tissues and rice grain. For the treatments applied FA only, soil pH was significantly decreased, while the concentrations of soil CaCl2-Cd, the Cd and Se in rice organs (except the Cd concentration in leaves and brown rice treated with low amount of FA), and the Cd distribution in different organs were not significantly influenced. The effect of combined application of Se and FA on soil pH was related to the dosage of two. High amount of Se combined with FA significantly reduced the CaCl2 extractable Cd in soil by 16.5% to 21.9%. Combined application of Se and FA significantly inhibited the translocation of Cd to aboveground organs and rice grain, and was more effectively in reducing the accumulation of Cd in brown rice. Compare with the control, Cd concentrations of rice in the two treatments applied with high amount of Se combined with FA were significantly decreased by 38.1% and 50.2%, respectively. In conclusion, the application of Se could effectively reduce the accumulation of Cd in brown rice, while the combined application of Se and FA had better effect.
Keywords:selenium  fulvic acid  cadmium  rice
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