中国稻米

• 专论与研究 • 上一篇    下一篇

水分管理对水稻镉吸收的影响

  1. 湖南农业大学农学院/南方粮油协同创新中心,长沙 410128
  • 出版日期:2019-07-20 发布日期:2019-07-20
  • 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 Water Management on the Absorption of Cadmium in Rice

  • Online:2019-07-20 Published:2019-07-20

摘要:

以晚稻品种玉针香和湘晚籼12号为供试材料,研究了3种水分灌溉方式(W1,长期淹水灌溉;W2,湿润灌溉 ;W3,阶段性湿润灌溉)对水稻糙米镉含量的影响。结果表明,在水稻生长的3个关键时期(分蘖期、灌浆期、成熟期),各部位镉含量、富集系数均以W3处理最高,W1处理最低;玉针香糙米镉含量W1处理分别比W2、W3处理低56.52%和66.67%,且W1处理与W3处理间存在显著差异;湘晚籼12号糙米镉含量W1处理分别比W2、W3处理低65.22%和52.94%,但各处理间差异不显著。可见,长期淹水灌溉是一项能够有效降低糙米镉含量的农艺措施。

关键词: 水稻, 水分管理, 镉含量, 镉积累量, 富集系数

Abstract:

Using late rice varieties Yuzhenxiang and Xiangwanxian 12 as materials, a pot experiment was conducted to study the effects of three different water irrigation modes (W1, long-term flood irrigation; W2, wet irrigation; W3, staged humid irrigation) on cadmium content in brown rice. The results showed that the cadmium content and enrichment coefficient of all parts were the highest in W3 treatment and the lowest in W1 treatment in the three growth periods. For Yuzhenxiang, the cadmium content in brown rice of W1 treatment was 56.52% and 66.67%% lower than that of W2 treatment and W3 treatment, respectively, moreover, there was a significant difference between W1 treatment and W3 treatment. For Xiangwanxian 12, the cadmium content in brown rice of W1 treatment was 65.22% and 52.94% lower than that of W2 treatment and W3 treatment, respectively, but the difference between treatments was not significant. Therefore, the long-term flooding irrigation is an agronomic measure that could safely and effectively reduce the cadmium content in brown rice.

Key words:  rice, water management, cadmium content, cadmium accumulation, enrichment coefficient

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