南京林业大学学报(自然科学版) ›› 2005, Vol. 29 ›› Issue (01): 25-28.doi: 10.3969/j.jssn.1000-2006.2005.01.006

• 研究论文 • 上一篇    下一篇

硅对盐胁迫下金丝小枣叶绿素荧光参数和气体交换的影响

徐呈祥1,2,徐锡增1*   

  1. 1. 南京林业大学森林资源与环境学院, 江苏 南京 210037; 2. 金陵科技学院园艺系, 江苏 南京 210038
  • 出版日期:2005-02-18 发布日期:2005-02-18

Effects of Silicon on Chlorophyll Fluorescence and Gas Exchange of Zizyphus jujuba cv. Jinsi-xiaozao Under Salt Stress

XU Cheng-xiang1,2, XU Xi-Zeng1*   

  1. 1. College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China; 2. Department of Horticulture Jinling College of Science and Technology, Nanjing 210038, China
  • Online:2005-02-18 Published:2005-02-18

摘要: <正>在栎林中多剖面采样测定土壤体积质量、非毛管孔隙度、稳渗率、有机质、pH等土壤因子。结果表明,各因子都具有一定的空间变异性,且垂直方向的变异大于水平方向。这种空间变异性的存在决定了在开展土壤研究中必须根据误差理论确定样本容量,才能保证测定结果具有可比性。统计分析结果显示,测定土壤稳渗率需要大量的样本。而测定其他因子,则仅需要20个以下样本即可以保证95%的可靠性。

Abstract: Effects of silicon addition on chlorophyll fluorescence and gas exchange of Zizyphus jujuba cv. Jinsi-xiaozao under salt stress were studied by using 2-year-grafted seedlings. Ordinary agronomic soil was selected as pot-cultured medium. Sources of sodium and silicon for experiment were sodium chloride and potassium silicate. Soil salt contents (NaC1) were planned 3 levels,i, e. 0 g/kg,3. 0 g/kg and 5. 0 g/kg. Soil silicon (Si) contents were planned 2 levels,i, e. 0 g/kg and 0. 4 g/kg. The experimental results showed that the growth in soils containing 3. 0 g/kg or 5. 0 g/kg NaC1 for 135 d salt ions had distinctively negative effects on j isi jujube plants: Chlorophyll content decreased by 12. 30% and 22. 08% respectively compared with none-salt stress, while silicon addition increased chlorophyll content by 12. 30o//oo and 22. 08% respectively compared with under the two salt stresses;Fv/Fo and Fv/Fo of PSⅡ, two important chlorophyll fluorescence parameters,decreased by 19. 96%,34. 58% and 8. 86%, 14. 10% respectively, while increased 32. 25%, 30. 71% and 11. 26%, 12. 15% respectively under silicon addition; photosynthetic rate and cellular conductance decreased by 11. 04%, 25. 32% and 26. 13%, 16. 22% respectively, while increased 10. 94%, 20. 87% and 42. 68%, 10. 85% respectively under silicon addition. The results revealed the silicon addition ameliorated salt toxicity, osmotic stress and nutrition deficit on Z. jujuba cv. Jinsi-xiaozao plant under salt stress.

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