| 蔡秋玲,林大松,王果,王迪.不同类型水稻镉富集与转运能力的差异分析[J].农业环境科学学报,2016,35(6):1028-1033. |
| 不同类型水稻镉富集与转运能力的差异分析 |
| Differences in cadmium accumulation and transfer capacity among different types of rice cultivars |
| 投稿时间：2016-01-19 |
| DOI：10.11654/jaes.2016.06.002 |
| 中文关键词: 水稻 品种 镉 富集系数 转运系数 产量 |
| 英文关键词: rice cultivar cadmium accumulation factor transfer factor production |
| 基金项目:公益性行业(农业)科研专项项目(201403014) |
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| 摘要点击次数: 3699 |
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| 中文摘要: |
| 选取84个水稻品种在镉(Cd)中轻度污染农田上进行原位小区试验,通过统计分析水稻Cd富集系数及转运系数,探索具有相似产量与Cd富集能力的水稻品种各器官Cd的富集及Cd在土壤-水稻系统中转移特征,比较不同类型水稻Cd富集与转运的差异。结果表明:水稻糙米Cd富集系数范围为0.10~0.78,小区产量范围为8.20~11.50 kg(以小区面积3.5 m×3.5 m计),不同水稻品种产量与糙米Cd富集能力不存在显著相关性。以产量和糙米Cd富集系数为指标将所有水稻品种进行聚类分为高产高Cd(组1)、低产高Cd(组2)、高产低Cd(组3)和低产低Cd(组4)四组。水稻各器官Cd富集规律均为根系> 茎> 叶> 糙米,Cd由根系向上传递过程中,含量越来越低。不同产量和富集能力的水稻类型的差异,主要在于茎和叶的富集与转移。高产或高Cd品种有较强的将Cd从根转运到茎和从茎、叶转运到米的能力。低Cd水稻无论产量高低,对各器官的Cd转运能力无显著影响。筛选、培育适合在中轻度污染区种植的高产低Cd水稻品种是可行的。在种植过程中控制茎的吸收与转运将对保障粮食安全生产具有重要意义。 |
| 英文摘要: |
| In-situ plot experiments were conducted to investigate characteristics of cadmium accumulation and transferring among various organs in 84 varieties of rice. Based on the interaction of production and Cd accumulation in brown rice, statistical differences analysis of accumulation and transfer factors were explored to study the feature of the Cd accumulation and transfer of rice. The results indicated that: The Cd accumulation factors(AF) of brown rice in all rice varieties were 0.10~0.78, and the area production were 8.20~11.50 kg (3.5 m×3.5 m). There is no significant correlation between the rice production and Cd AF of brown rice. Based on interaction of rice production and Cd AF of brown rice, all varieties were sorted by clustering analysis into four groups as high production with high Cd accumulation(group 1), low production with high Cd accumulation(group 2), high production and low Cd accumulation(group 3), low production and low Cd accumulation(group 4). Cd AF in different organs of all varieties followed the order of root> stem> leaf> brown rice, decreasing in the transfer process from root to shoot. The difference of rice types with different production and concentration mainly depended on the accumulation and transfer in the stem and leaf. Rice varieties with high production or high Cd accumulation had strong capacities to transfer Cd from root to stem and further to leaf and brown rice. Production had no significant effect on the transfer capacity of Cd among different organs for the rice varieties with low Cd accumulation. It is feasible to screen and cultivate rice varieties with high production and low Cd accumulation that are suitable to plant in the middle and light Cd contaminated area. Controlling the absorption and transportation of the stem and leaf for Cd in the rice planting will be of great significance to ensure the safety of food production. |
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