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生态学杂志 ›› 2010, Vol. 29 ›› Issue (09): 1794-1798.

• 研究报告 • 上一篇    下一篇

蒸腾作用及根系特征对不同品种油菜吸收镉的影响

高茜蕾1,2,郑瑞伦1,李花粉1**   

  1. 1中国农业大学资源与环境学院| 北京 100193;2西安工业大学| 西安 710032
  • 出版日期:2010-09-08 发布日期:2010-09-08

Effects of transpiration rate and root character on cadmium absorption by pakchoi cultivars.

GAO Qian-lei1,2, ZHENG Rui-lun1, LI Hua-fen1   

  1. 1College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China|2 Xi’an Technological University, Xi’an 710032, China
  • Online:2010-09-08 Published:2010-09-08

摘要: 采用营养液培养试验研究了12个油菜品种地上部的镉含量、蒸腾速率和根系形态特征(根长、根表面积、根体积),并对不同品种油菜地上部镉含量与蒸腾速率和根系形态特征进行了相关分析。结果表明:不同品种油菜对镉的吸收累积有显著差异,油菜地上部镉含量以鲜质量计为1.8~4.4 mg·kg-1,相差1.5倍,同时不同品种油菜的蒸腾速率与根系形态均存在显著性差异;蒸腾速率和根表面积、根体积均与不同油菜品种地上部镉浓度、吸镉总量呈显著正相关(P<0.01),根长只与油菜吸镉总量呈显著正相关,表明高的蒸腾强度和发达的根系均能促进油菜地上部镉的累积量。

关键词: 生姜, 土壤水分, 光照, 形态特性, 产量

Abstract: A hydroponic experiment with twelve pakchoi cultivars was conducted to study the cadmium (Cd) accumulation in their aboveground part, and the correlations of this accumulation with the transpiration rate and root characters (root length, root surface area, and root volume) of the cultivars. There were significant differences in the Cd absorption and accumulation among the cultivars. The Cd concentration in the fresh shoot of pakchoi ranged from 1.8 to 4.4 mg·kg-1, with 1.5-fold difference among the cultivars. There were also significant differences in the transpiration rate and root morphology among the cultivars. Transpiration rate, root surface area, and root volume all had significant positive linear correlations with the Cd concentration and the total amount of absorbed Cd in the aboveground part of pakchoi (P<0.01), while root length only had a significant positive correlation with the total amount of absorbed Cd, suggesting that high intensity of transpiration and developed root system could promote the Cd accumulation in edible parts of pakchoi.

Key words: Ginger, Soil water, Light intensity, Morphologic characteristics, Yield