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生态学杂志 ›› 2012, Vol. 31 ›› Issue (11): 2817-2822.

• 研究报告 • 上一篇    下一篇

喷钙对芍药花茎品质及叶片光合特性的影响

李成忠1,2,陶俊1**,孙燕2,孔芬1,耿庆萍1,杜蓓1   

  1. (1扬州大学园艺与植物保护学院, 江苏扬州 225009; 2扬州环境资源职业技术学院园林园艺系, 江苏扬州 225127)
  • 出版日期:2012-11-10 发布日期:2012-11-10

Effects of spraying calcium on the inflorescence stem quality and leaf photosynthesis of herbaceous peony (Paeonia lactiflora Pall.).

LI Cheng-zhong1,2, TAO Jun1**, SUN Yan2, KONG Fen1, GENG Qing-ping1, DU Bei1   

  1. (1College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, Jiangsu, China; 2Department of Landscape Architecture and Horticulture, Yangzhou Vocational College of Environment and Resources, Yangzhou 225127, Jiangsu, China)
  • Online:2012-11-10 Published:2012-11-10

摘要: 以5年生芍药盆栽苗为试材,研究了喷钙措施对芍药花茎品质、花茎机械强度及叶片光合参数的影响。结果表明,喷钙处理(4%,w/v)显著提高了花茎的机械强度,增幅达24.3%,花茎中纤维素、半纤维素、木质素及果胶含量均较对照显著增加,其中纤维素含量为456.54 μg·g-1,较对照增加了28.5%,增幅最大。喷钙处理还使芍药叶片净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)和水分利用效率(WUE)增加,至处理28 d时,Pn为17.07 μmol·m-2·s-1,较对照增加29.6%,Gs较对照提高了55%,为0.31 mol·m-2·s-1Tr较对照提高了20%,达到2.61 mmol·mol-1,WUE为6.54 mmol·mol-1,较对照增加7.6%。另外,喷钙使芍药叶片最大净光合速率(Pmax)达到20.71 μmol·m-2·s-1,较对照提高24.6%,光饱和点为902.5 μmol·m-2·s-1,较对照增加7.5%,而光补偿点则显著降低,为7.27 μmol·m-2·s-1,较对照降低34.5%。

关键词: 克里格插值, 黄泛区, 土壤磷, 半方差函数, 空间变异

Abstract: Taking 5-year old herbaceous peony (Paeonia lactiflora Pall.) as test material, a pot experiment was conducted to study the effects of spraying calcium (4%, w/v) on the inflorescence stem quality and leaf photosynthetic characteristics of the plant. Under the spraying of calcium, the mechanical strength of the inflorescence stem increased significantly by 24.3%, and the cellulose, semicellulose, lignin, and pectin contents in the inflorescence stem all increased significantly, among which, the cellulose content reached 456.54 μg·g-1 and enhanced by 28.5%, as compared with the control. The leaf net photosynthetic rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), and water use efficiency also increased, with the Pn up to 17.07 μmol·m-2·s-1 28 days after calcium application and enhanced by 29.6%, and the Gs, Tr and WUE enhanced by 55%, 20%, and 7.6%, respectively, as compared with the control. In addition, spraying calcium led to an increase of the maximum net photosynthetic rate (Pmax) and the light saturation point, which were up to 20.71 μmol·m-2·s-1 and 902.5 μmol·m-2·s-1 and enhanced by 24.6% and 7.5%, respectively, but led to a significant decrease of light compensation point, which was 7.27 μmol·m-2·s-1 and decreased by 34.5%.

Key words: semivariance function, flooded area of the Yellow River, soil phosphorus, Kriging interpolation, spatial variation.