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适于轻度Cd、As污染土壤种植的水稻品种筛选
引用本文:叶新新,周艳丽,孙波.适于轻度Cd、As污染土壤种植的水稻品种筛选[J].农业环境保护,2012(6):1082-1088.
作者姓名:叶新新  周艳丽  孙波
作者单位:[1]中国科学院南京土壤研究所,南京210008 [2]中国科学院研究生院,北京100049
基金项目:农业部公益性行业科研专项(200903015);质检公益性行业科研专项(200910201)
摘    要:对重金属具有高耐性、低富集的水稻品种可用于轻度重金属污染的水稻土。采用温室盆栽试验研究2种水稻土(红泥田和黄泥田)中Cd、As污染对9种水稻生长的影响,分析不同水稻品种对Cd、As富集能力的差异。结果表明,As污染处理下所有水稻品种的生物量均显著降低,在红泥田上,水稻生物量降低幅度为29.4%~54.3%;在黄泥田上,降低幅度为29.5~53.3%。不同水稻品种对As耐性有显著差异(P〈0.05),晚粳9707(粳稻)生物量降幅较小,耐性较高;浙1500(籼稻)降幅较大,耐性较低。对于Cd污染处理,在2种类型土壤上9种水稻对Cd耐性差异不显著。不同水稻品种对土壤Cd、As的富集能力有显著差异(P〈0.05)。在2种类型土壤上,德农2000(杂交稻)和浙1500(籼稻)分别对As、Cd的富集系数最高,对As、Cd污染敏感;南粳32(粳稻)对Cd、As的富集系数均较低,对Cd、As污染不敏感。在9个水稻品种中,南粳32对Cd、As的富集能力最低,并且对As耐性较高,适合在Cd、As轻度污染的水稻土上种植。

关 键 词:水稻品种  As  Cd  富集系数  红泥田  黄泥田

Screening of Suitable Rice Cultivars for the Adaptation to Lightly Contaminated Soil with Cd and As
YE Xin-xin,ZHOU Yan-li,SUN Bo.Screening of Suitable Rice Cultivars for the Adaptation to Lightly Contaminated Soil with Cd and As[J].Agro-Environmental Protection,2012(6):1082-1088.
Authors:YE Xin-xin  ZHOU Yan-li  SUN Bo
Institution:1.Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; 2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China)
Abstract:Pot experiments were carried out to study the effects of spiked As and Cd pollution on the biomass and accumulation of heavy metals by 9 rice cultivars( Oryza sativa L. ) in two different types of paddy soils. The results indicated that the rice biomass significantly reduced in both soils when spiked with As. The reduction of biomass for 9 euhivars ranged from 29.4% to 54.3% in red paddy soil and from 29.5% to 53.3% in yellow paddy soil. There was a significant difference in the tolerance among 9 rice cultivars(P〈0.05 ). The reduction of biomass for Wanjing9707 (japonica) was the least, which indicated that it was the highest tolerant to As, while the reduction of biomass for ZhelSO0(in- diea) was the largest, which showed that it was the least tolerant to As. For Cd pollution treatment, there were no significant differences in the tolerance to Cd among 9 euhivars in two types of soils. Different rice cultivars showed a significant difference in accumulation capacity for Cd and As(P〈0.05 ). Denong 2000(hybrid rice ) and Zhe 1500(indica) were the most sensitive rice euhivar to As and Cd pollution, respectively, which had the highest bioaccumulation coefficient(BCF). The cuhivar Nangeng32(japonica) had a lower BCF for Cd and As and was more tolerant to As pollution. Among 9 rice cultivars, Nangeng32 was suitable for planting in the paddy soils with light contamination of Cd and As.
Keywords:rice euhivar  arsenic  cadmium  bioaccumulation coefficient  red paddy soil  yellow paddy soil
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