生长在不同类型绿地的银杏光合生理特性的研究

为了研究银杏在城市园林何种绿地上生长最佳,试验对合肥市生产绿地、公园绿地、防护绿地、附属绿地4种绿地上的银杏,进行光合作用生理特性日变化的测定。比较了这4种绿地上银杏的净光合速率、蒸腾速率和水分利用效率等生理生态指标。结果表明:公园绿地上银杏的净光合速率均值最大4.265μmolCO2/m2.s;其次是附属绿地上为2.6907μmol CO2/m2.s和生产绿地上为2.6507μmol CO2/m2.s;防护绿地上银杏的净光合速率均值最低为1.9317μmol CO2/m2.s;各个绿地上银杏水分利用效率特性有同其净光合速率的变化趋势。从光合作用角度得出,银杏在公园绿地上应用为最佳,其次是附属绿地和生产绿地上应用的,较差的是防护绿地上应用的。

Study on Photosynthesic and Physicaloical Characteristics of the Leaves in Ginkgo Grown at Different Types of Green Spaces

In order to study on which green spaces can supply best suitation for Ginkgo＇s growth in city landscape,determined the daily changes of eco-physiological characteristics about Ginkgo＇s photosynthesis under productive plantation area,public park,green buffer,attached green space in Hefei city.Compared Ginkgo eco-physiological indexs in the four areas,such as net photosynthesis rate,transpiration and water use efficiency,ect.The results showed that： the maximum of Ginkgo net photosynthesis rate is public park with 4.265μmol CO2/m2·s;next is attached green space with 2.6907μmol CO2/m2·s and productive plantation area with 2.6507μmol CO2/m2·s;the minimum is green buffer with 1.9317μmol CO2/m2·s.The water use efficiency characteristics of Ginkgo same with the trends of net photosynthesis rate.Therefore,in photosynthesic perspective,Ginkgo was growing best in parks,attached green space and productive plantation area followed,the worst is used under green buffer.