中国稻米

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综合降镉技术在不同污染程度稻田土壤下的应用效果研究

  1. 1 湖南农业大学农学院/南方粮油协同创新中心,长沙 410128;2 湖南省农业资源与环境保护工作站,长沙 410125; 3 湖南省长沙县农业和林业局,湖南 长沙 410100
  • 出版日期:2018-03-20 发布日期:2018-03-20
  • 通讯作者: 敖和军
  • 基金资助:

    国家自然科学基金“水分管理影响水稻植株内镉分布与转运的机理研究”(31401340);国家水稻产业技术体系-栽培与土肥岗位专家项目(CARS-01)

Effects of VIP Technology on Reducing Cadmium under Different Cadmium Pollution Degree Paddy Soil

  • Online:2018-03-20 Published:2018-03-20

摘要:

为了探究综合降镉技术在不同污染程度稻田土壤中的降镉效果,于2014年,在湖南省38丘镉污染稻田进行小区试验,研究了VIP降镉技术(V,种植低镉积累品种;I,优化水分管理;P,施用石灰)在不同土壤污染程度下的应用效果。结果表明,未采用VIP技术的对照处理的早稻米镉含量在土壤轻微、轻度、中度、重度条件下分别为0.191、0.199、0.295和0.423 mg/kg,晚稻米分别为0.278、0.298、0.524和0.778 mg/kg。采用VIP技术后,早稻米镉含量分别0.110、0.152、0.157和0.307 mg/kg,比对照降低了42.4%、23.6%、46.8% 和27.4%;晚稻米镉含量分别为0.153、0.201、0.397和0.604 mg/kg,比对照降低了45.0%、32.6%、24.2%和22.4%。由此可见,综合降镉VIP技术在不同污染程度土壤下均有降低糙米中镉含量的作用,可使轻微、轻度土壤污染条件下米镉含量达到国家食品安全标准,对于中度、重度污染稻田的降镉措施还需进一步研究。

关键词: 水稻, 镉污染, VIP降镉措施, 低镉品种, 水分管理

Abstract:

In order to explore the comprehensive effects of VIP technology( V, low cadmium planting varieties; I, Optimize water management; P, Liming) on reducing cadmiumin under different pollution degree paddy soil,  a field experiment with 38 mounds of cadmium pollution paddy soil was carried out in Hunan province in 2014. The results showed that the cadmium content of early rice of CK were 0.191, 0.199, 0.295 and 0.423 mg/kg in slight, mild, moderate and severe conditions, respectively. By using VIP technology, early rice cadmium content were 0.110, 0.152, 0.157 and 0.307 mg/kg, which reduced 42.4%, 23.6%, 46.8% and 27.4% compared with CK. The cadmium content of late rice were 0.153, 0.201, 0.397and 0.604 mg/kg, which reduced 45%, 24.2%, 32.6% and 22.4% compared with CK. Above all, the comprehensive effects of reducing cadmium(VIP) of comprehensive measures of cadmium reduction has reduced the cadmium content in brown rice under different degree of pollution. It can make the cadmium content of slight, mild soil pollution to reach the safety national food standards. But how to reduce the cadmium content in moderate and severe pollution soil still needs further research.

Key words: rice, cadmium pollution, VIP cadmium reduction measures, low cadmium varieties, water management

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