CO2浓度升高对铜镉污染土壤粳稻稻米安全品质的影响

生态学杂志

CO₂浓度升高对铜镉污染土壤粳稻稻米安全品质的影响

王潇^1,2,宋正国^1**,武慧斌¹,廉菲¹,邹洪涛²

(¹农业部环境保护科研监测所生态毒理与环境修复研究中心，天津 300191； ^2沈阳农业大学，沈阳 110866)

出版日期:2014-05-10 发布日期:2014-05-10

Effects of elevated CO₂ on the rice quality of Japonica rice in copper and cadmium contaminated soil.

WANG Xiao^1,2, SONG Zheng-guo^1**, WU Hui-bin¹, LIAN Fei¹, ZOU Hong-tao²

(¹Centre for Research in Ecotoxicology and Environmental Remediation, Institute of AgroEnvironmental Protection, Ministry of Agriculture, Tianjin 300191, China; ² Shenyang Agricultural University, Shenyang 110866, China)

Online:2014-05-10 Published:2014-05-10

摘要/Abstract

摘要： 采用盆栽试验，在开顶式气室(OTC)内种植水稻，研究了5个粳稻品种在铜镉复合污染土壤上，CO₂浓度升高对水稻吸收Cu、Cd和矿质元素Fe、Zn的影响，并对稻米中Cd的安全性进行了评价。结果表明：在2种复合污染水平土壤上，CO₂浓度升高条件下，除千重浪2号稻米中Cu含量在高污染土壤处理下增加20.3%外，其他品种稻米Cu含量均有所降低，降低幅度为20.6%～30.2%、2.4%～12.3%；CO₂浓度升高除降低了高污染土壤上元丰6号稻米中Cd含量外，均增加了其他品种在低、高污染土壤上的稻米Cd含量，增加幅度分别为3.7%～297.4%、31.7%～209.1%；2种污染水平土壤上，CO₂浓度升高对不同品种稻米中Fe、Zn含量变化影响差异显著；CO₂浓度升高下，元丰6号、勇丰金穗品种稻米中Cd含量超过食品卫生标准（Cd≤0.2 mg·kg^-1）；CO₂浓度升高会增加5种稻米中Cd的标靶危害系数，其中，勇丰金穗和元丰6号稻米中Cd的THQ值>1，表明CO₂浓度升高下，其对人体健康已构成了潜在风险。

关键词: 水盐运移, 咸水灌溉, 暗管排水, 高水位, 冬小麦产量

Abstract:

A pot experiment in open top chambers was conducted to investigate the effect of elevated CO₂ on the uptake of Cu and Cd by five Japonica rice varieties (Qianchonglang-2, Shennong-9903, Yongfengjinsui, Fuhe-77, and Yuanfeng-6) in a soil contaminated with two levels of Cu and Cd. The results showed that under elevated CO₂, Cu uptake by the rice varieties except Qianchonglang-2 in the lowly and highly-contaminated soils decreased by 20.6%-30.2% and 2.4%-12.3%, while Cd uptake increased markedly except Yuanfeng6 by 3.7%-297.4% and 31.7%-209.1%, respectively. Although the uptake of Cd by Yuanfeng6 decreased in the highlycontaminated soil, its Cd content still exceeded the China’s national hygienic limit for foods (Cd≤0.2 mg·kg^-1). Additionally, elevated CO₂ increased the values of target hazard quotients (THQ) for Cd toxicity to rice with the THQ >1 in Yongfengjinsui and Yuanfeng-6, which implied that elevated CO₂ would increase the Cd risk of rice to human body health in contaminated soils.

Key words: winter wheat yield., soil water salt movement, subsurface drainage, saline water irrigation, high water table

王潇1,2,宋正国1**,武慧斌1,廉菲1,邹洪涛2. CO₂浓度升高对铜镉污染土壤粳稻稻米安全品质的影响[J]. 生态学杂志.

WANG Xiao1,2, SONG Zheng-guo1**, WU Hui-bin1, LIAN Fei1, ZOU Hong-tao2. Effects of elevated CO₂ on the rice quality of Japonica rice in copper and cadmium contaminated soil.[J]. cje.

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CO₂浓度升高对铜镉污染土壤粳稻稻米安全品质的影响

Effects of elevated CO₂ on the rice quality of Japonica rice in copper and cadmium contaminated soil.

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