不同品种对水稻铅汞耐性和富集能力的影响
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农业部公益性行业科研专项(200903015)和江西省科技计划项目(20132BBF60078)资助


Effects of Rice Cultivars on Their Tolerance and Accumulation for Pb and Hg Pollution
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    摘要:

    选取2种类型水稻土(黄泥土和红泥土)和9个水稻品种,通过温室盆栽试验,研究Pb(250 mg/kg)、Hg(0.6 mg/kg)污染条件下,水稻品种对水稻Pb、Hg耐性和富集能力的影响。结果表明,Pb污染处理显著降低了水稻产量,在红泥土和黄泥土中,水稻产量的降低幅度分别为3.6% ~ 29.8%?和2.3% ~ 16.9%;Hg污染处理下,水稻产量略有下降,但差异不显著。不同品种水稻对Pb、Hg污染的耐性和富集能力差异显著。在Pb污染处理下,宁粳1号产量降幅较小,耐性较高;天协6号产量降幅较大,耐性较低;在Hg污染处理下,宁粳1号耐性较高,浙1500耐性较低。在2种类型水稻土中,特三矮2号稻米Pb的富集系数较高,对Pb污染较敏感;浙1500稻米Hg的富集系数较高,对Hg污染较敏感;宁粳1号稻米Pb、Hg的富集系数均较低,对Pb、Hg污染均不敏感。水稻品种、土壤类型和污染类型对水稻Pb、Hg耐性的影响不同,3个因子的相对贡献率分别为36.5%、18.3%?和27.1%。

    Abstract:

    Pot experiments were carried out by using two types of paddy soils (yellow paddy soil and red paddy soil) and nine rice varieties to study the effects of cultivar on their tolerance and accumulation for Pb and Hg pollution. The results indicated that the yields of all rice varieties reduced significantly when spiked with Pb. The reduction of yield ranged from 3.6% to 29.8% in red paddy soils and from 2.3% to 16.9% in yellow paddy soils. For Hg pollution treatment, the yields of 9 varieties reduced slightly with no significant difference. There was a significant difference in the tolerance to Pb and Hg among 9 rice cultivars. For Pb treatment, the reduction of yield for Ningjing 1 was the least, which indicated that it’s highest tolerant to Pb, while the reduction of yield for Tianxie 6 was the largest, which showed that it’s least tolerant to Pb. For Hg treatment, Ningjing 1 was the highest tolerant to Hg while Zhe 1500 was the least. Different rice cultivars showed a significant difference in accumulation capacity of Pb and Hg. Tesanai 2 had the highest bioconcentration factor(BCF) of Pb, which indicated it’s most sensitive to Pb, while Zhe 1500 had the highest BCF of Hg, which indicated it’s most sensitive to Hg contamination. Ningjing 1 had the lowest BCF of Pb and Hg, which showed it’s least sensitive to both Pb and Hg contamination. Rice cultivar, soil type and pollution type differed in their effects on the tolerance of rice for Pb and Hg pollution, they contributed seperatly 36.5%, 18.3% and 27.1% of the total varitaion, respectively.

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吴 亮,孙 波.不同品种对水稻铅汞耐性和富集能力的影响[J].土壤,2014,46(6):1061-1068. WU Liang, SUN Bo. Effects of Rice Cultivars on Their Tolerance and Accumulation for Pb and Hg Pollution[J]. Soils,2014,46(6):1061-1068

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  • 在线发布日期: 2015-01-20
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