不同水分管理模式对水稻生长及重金属迁移特性的影响

崔晓荧; 秦俊豪; 黎华寿

文章摘要

崔晓荧,秦俊豪,黎华寿.不同水分管理模式对水稻生长及重金属迁移特性的影响[J].农业环境科学学报,2017,36(11):2177-2184.

不同水分管理模式对水稻生长及重金属迁移特性的影响

Effect of different water management modes on rice(Oryza sativa L.) growth and heavy metal transport characteristics

投稿时间：2017-05-07

DOI：10.11654/jaes.2017-0665

中文关键词: 水稻水分管理重金属迁移特性

英文关键词: rice(Oryza sativa L.) water management heavy metal transport characteristics

基金项目:国家高技术研究发展计划（"863计划"）项目（2013AA102402）；国家自然科学基金资助项目（41271469）；广东省科技计划项目（2013B020303001，2015B090903077）

作者	单位	E-mail
崔晓荧	华南农业大学农业部华南热带农业环境重点实验室, 广州 510642 广东省现代生态农业与循环农业工程技术研究中心, 广州 510642
秦俊豪	华南农业大学农业部华南热带农业环境重点实验室, 广州 510642 广东省现代生态农业与循环农业工程技术研究中心, 广州 510642
黎华寿	华南农业大学农业部华南热带农业环境重点实验室, 广州 510642 广东省现代生态农业与循环农业工程技术研究中心, 广州 510642	lihuashou@scau.edu.cn

摘要点击次数: 2628

全文下载次数: 2489

中文摘要:

通过水泥池小区试验，研究了淹水（CF）和干湿交替（IF）两种水分管理模式对常规稻（C）与杂交稻（H）生长及重金属Pb、Cr、Cd富集的影响。结果表明，干湿交替（IF）处理能显著提高水稻的生物量及产量，增强了Pb、Cr、Cd在土壤-水稻系统中的迁移能力，并显著促进水稻根系对Cd的富集，提高米粒中Cr的含量。研究结果还表明，水分管理对Cr在水稻体内的迁移特性的影响明显不同于Pb和Cd。Pb、Cd在水稻体内含量呈现根 > 茎叶 > 米粒，而Cr则为米粒/茎叶 > 根，且不同水分管理模式对常规稻（C）米粒富集Cr的影响较杂交稻（H）大。可见，干湿交替模式虽能促进水稻生长和增产，同时却显著提高了Cd和Cr的生物有效性。因此，在采取相应水分管理模式降低重金属生物有效性时应充分考虑水稻对不同重金属类型的响应差异，才能更有效地控制当前农田环境的重金属污染。

英文摘要:

A pool experiment was conducted to study the effects of two water management modes as continuous flood(CF) and interval flood(IF) on the growth and Pb, Cd, and Cr accumulation of two kinds of Oryza sativa L.(conventional rice and hybrid rice) cultivars. The results showed that the irrigation mode of IF signicantly increased the rice biomass and yield. However, this irrigation mode enhanced the mobilization of Pb, Cd, and Cr in the soil-rice system and signicantly increased the accumulation of Cd in the roots and Cr in the grains. Furthermore, the transport characteristics of Cr were different from those of Pb and Cd in the rice system during the water management modes. The accumulation order of Pb and Cd in the rice was root > stem and leaf > grain, whereas grain/stem and leaf > root was the order for Cr. In addition, the water management modes had a greater impact on the accumulation of Cr in the grain of conventional rice than in the grain of hybrid rice. Although the IF irrigation mode could significantly promote the growth of rice, it significantly increased the bioavailabilities of Cd and Cr as well. Therefore, the different responses of rice to different heavy metals should be considered when water management is conducted to reduce heavy metal bioavailability and heavy metal pollution, in order to effectively mitigate heavy metal pollution in farmland environment systems.

HTML 查看全文查看/发表评论下载PDF阅读器