欢迎访问《生态学杂志》官方网站,今天是 分享到:

生态学杂志

• 研究报告 • 上一篇    下一篇

施硅对镉胁迫下水稻镉吸收和转运的调控效应

彭鸥1,2,3,刘玉玲1,2,3,铁柏清1,2,3*,董思俊1,2,3,魏祥东1,2,3,刘孝利1,2,3,周细红1,2,3   

  1. (1湖南农业大学资源环境学院, 长沙 410128;2湖南省灌溉水源水质污染净化工程技术研究中心, 长沙 410128;3重金属污染耕地安全高效利用湖南省工程研究中心, 长沙 410128)
  • 出版日期:2019-04-10 发布日期:2019-04-10

Effects of silicon application on cadmium uptake and translocation of rice under cadmium stress.

PENG Ou1,2,3, LIU Yu-ling1,2,3, TIE Bai-qing1,2,3*, DONG Si-jun1,2,3, WEI Xiang-dong1,2,3, LIU Xiao-li1,2,3, ZHOU Xi-hong1,2,3   

  1. (1College of Resources and Environment of Hunan Agricultural University, Changsha 410128, China; 2Engineering Research Center for Water Pollution Purification of Irrigation Source in Hunan Province, Changsha 410128, China; 3Engineering Research Center of Efficient Utilization of Heavy Metal Polluted Croplands in Hunan Province, Changsha 410128, China).
  • Online:2019-04-10 Published:2019-04-10

摘要: 探讨镉(Cd)胁迫下,施硅处理对水稻镉积累的影响。以水稻“泰优390”为材料,通过营养液培养的方法,研究水稻在3种镉胁迫浓度(Cd1、Cd2、Cd3)下施用4种不同浓度硅(Si0、Si1、Si2、Si3)对水稻镉积累的影响。结果表明:施用硅浓度越高,水稻产量增加越大,对水稻各部位镉含量具有显著降低效果;施硅能显著降低水稻各部位转运系数,阻控镉向地上部转移,且对水稻伤流液中镉含量也能起到显著降低的作用;表明施硅能有效阻控水稻吸收镉,且施硅浓度越高效果越显著,但考虑成本因素,不同程度镉污染应该施用相应量的硅,以达到国家食品中污染物限量标准;施硅与镉胁迫对水稻农艺性状以及镉吸收和转运存在交互作用。本试验结果为科学管理和合理利用重金属污染土壤以及适量施用硅肥提供依据,对生产安全稻米有一定的指导意义。

关键词: 溶磷真菌, 溶磷能力, 有机酸, 铜尾矿

Abstract: Effects of four concentrations of silicon (Si0, Si1, Si2, Si3) on cadmium (Cd) accumulation in rice “Taiyou 390” under three Cd concentrations (Cd1, Cd2, Cd3) were investigated. The results showed that rice yield increased with the increases of Si concentration. The Cd concentration in various parts of rice significantly decreased. Si application significantly reduced the transport coefficient in different parts of the rice, prevented the transfer of Cd to the aboveground part, and reduced Cd concentration in rice wound fluid. Si application effectively prevented and controlled Cd absorption in rice, with the magnitude of such effects increasing with Si concentration. With the consideration of cost, corresponding amount of Si should be applied to the pollution degree of Cd in order to reach the limit standard of the pollutants in foods. Meanwhile, there was an interaction between Si and Cd stress on rice agronomic trait, Cd uptake and transport. Our results provide basis for scientific management and rational utilization of heavy metal contaminated soil by proper application of Si fertilizer, which has significance for the production of rice with suitable food safety.

Key words: phosphate-solubilizing fungi, phosphate-solubilizing capability, organic acid, copper mine tailings.