WEN Ying,LIAO Fei-yong.Effect of Water Stress on the Physiology of Cercis chinensis Bunge[J].Northern Horticulture,2012,36(14):64-67.
水分胁迫对紫荆生理的影响
- Title:
- Effect of Water Stress on the Physiology of Cercis chinensis Bunge
- 文章编号:
- 1001-0009（2012）14-0064-04
- 分类号:
- S 685.99
- 文献标志码:
- A
- 摘要:
- 以2 a生紫荆为试材，探讨水分胁迫对其生理的影响，为园林绿地中紫荆的灌溉提供理论指导。结果表明：水淹和干旱胁迫明显影响紫荆的生长。水淹4 d后，表现为qP值、ETR值、净光合速率的明显下降，7 d后植株死亡。处理20 d后，干旱胁迫(土壤含水量低于8.1%)严重抑制植株的生长，表现为qP、ETR、Fv′/Fm′、Fv/Fm、叶片含水量、净光合速率的急剧降低，及Fo的升高，处理23 d后植物死亡。长时间的中度干旱（含水量日变化在8%～15%之间）影响紫荆的生长，表现为qP值、ETR 值、净光合速率、Trmmol偏低。轻度干旱适宜植物生长，表现为3次测定的qP、ETR、净光合速率都较高。土壤含水量日变化在15%～25%以内受轻度水分胁迫是园林中紫荆的最佳灌溉方式，既不影响景观效果，同时也能节约灌溉用水。
- Abstract:
- The effects of water stress on the two year old Cercis chinensis Bunge were tested for proving the irrigation guidance for its application in the garden.The results showed that the water stress and the drought stress suppressed the growth of Cercis chinensis Bunge.After treated with flooding for 4 days，the qP，ETR，net photosynthetic rate were decreased，and the plants almost died after treated for 7 days.After treated for 20 days,the drought stress suppressed(the water content of soil remained below 8.1 percent) the growth of plants，which was embodied in the increasing of qN，the decreasing of qP，ETR，Fv′/Fm′，Fv/Fm,net photosynthetic rate and the plants almost died after treated for 23 days.After treated for a long time，The mid drought stress (the water content of soil were between 8 percent and 15 percent) decreased the growth of plants，which was embodied in the decreasing of qP，ETR，net photosynthetic rate，Trmmol.The slight drought (the water content of soil were between 15 percent and 25 pecent) was adapt for Cercis chinensis Bunge，which was embodied in having the high qP，ETR and net photosynthetic rate in 3 tested.The best irrigation for Cercis chinensis Bunge,was the water content of soil between 15 percent and 25 percent，which did not affect the ornamental value of Cercis chinensis Bunge，and save the irrigation water.
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备注/Memo
第一作者简介：文瑛（1986-），女，在读硕士，研究方向为园林植物与观赏园艺。E-mail：494793654@qq.com.
责任作者：廖飞勇(1973-)，男，博士，副教授，研究方向为园林生态学及园林植物与观赏园艺。E-mail：xylfy@163.com.
基金项目：湖南省“十二五”重点学科(风景园林学)资助项目（湘教发[2011]76号）；中南林业科技大学研究生科技创新基金资助项目（2009sx17）；湖南省2011年研究生科研创新资助项目(CX2011B330)；湖南省教育厅资助项目(10B120)。
收稿日期：2012-03-15