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456.54μg·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28d时,Pn为17.07μmol·m-2·s-1,较对照增加29.6%,Gs较对照提高了55%,为0.31mol·m-2·s-1,Tr较对照提高了20%,达到2.61mmol·mol-1,WUE为6.54mmol·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20.71μmol·m-2·s-1,较对照提高24.6%,光饱和点为902.5μmol·m-2·s-1,较对照增加7.5%,而光补偿点则显著降低,为7.27μmol·m-2·s-1,较对照降低34.5%。
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%.
出处
《生态学杂志》
CAS
CSCD
北大核心
2012年第11期2817-2822,共6页
Chinese Journal of Ecology
基金
江苏省科技支撑计划项目(BE2009318)
江苏省农业科技自主创新项目(CX[10]114和CX[11]1017)资助
关键词
芍药
喷钙
花茎
光合特性
机械强度
herbaceous peony
spraying calcium
inflorescence stem
photosynthetic characteristics
mechanical strength.
