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1、瑞木是叶色和冬季落叶后枝条颜色都十分美丽的灌木，可丛植或列植草坪边缘及林缘。这些彩色树种与常绿或落叶的绿叶树种合理搭配应用，可以营造色彩丰富、引人入胜的景观效果。关键词：光合作用，净光合速率，光响应曲线，彩色植物IV万方数据AbstractColorplantshavebroadapplicationprospectsincitycolorlandscape.Thisstudyexploredthephotosyntheticphysiology,shadetoleranceanddroughtresistanceoffourcolorplantsincludingSwidealb
2、a‘Aurea’,Ginkgobiloba‘Goldenleaf’,Cerciscanadensis‘ForestPansy’,Ulmuspumilavar.pendula‘Goldenleaf’.Thestudyaimedtoprovideatheoreticalbasisfortheintroducedandarrangementofthefourcolorplants.Theresultsshowedthat:1.ThelightsaturationpointofSwidealba‘Aurea’,Ginkgobiloba‘Goldenleaf’,Cerciscanadensi
3、s‘ForestPansy’,Ulmuspumilavar.pendula‘Goldenleaf’were-2-130.69,67.87,35.27and74.14μmol·m·s.ThelightcompensationpointofSwidealba‘Aurea’,Ginkgobiloba‘Goldenleaf’,Cerciscanadensis‘ForestPansy’,Ulmuspumilavar.pendula‘Goldenleaf’were1448.67，1472.62，1470.84and-2-11326.59μmol·m·s.Ginkgobiloba‘Goldenl
4、eaf’andUlmuspumilavar.pendula‘Goldenleaf’belongedtoshadeintolerantpositivespecies.Swidealba‘Aurea’andCerciscanadensis‘ForestPansy’belongedtoalittleshadeintolerantpositivespecies.2.ThediurnalvariationofphotosyntheticrateofSwidealba‘Aurea’andGinkgobiloba‘Goldenleaf’wereunimodalityinspringandautu
5、mnandwerebimodalityinsummer.ThemaximumnetphotosyntheticrateofdailyaveragevalueofSwidealba‘Aurea’andCerciscanadensis‘ForestPansy’appearedinsummer,whileGinkgobiloba‘Goldenleaf’andUlmuspumilavar.pendula‘Goldenleaf’appearedinautumn.3.ThegreatestimpactuponnetphotosyntheticrateofSwidealba‘Aurea’andU
6、lmuspumilavar.pendula‘Goldenleaf’werephotosyntheticallyactiveradiationinspring,autumnandsummer.ThegreatestimpactuponnetphotosyntheticrateofGinkgobiloba‘Goldenleaf’werethetranspirationrateininspring,relativehumidityinsummer,andphotosyntheticallyactiveradiationinautumn.Thegreatestimpactuponnetph
7、otosyntheticrateofCerciscanadensis‘ForestPansy’wererelativehumidityinspring,photosyntheticallyactiveradiationinsummerandautumn.4.ThelightenergyutilizationofSwidealba‘Aurea’,followedby0.64%,0.63%and0.02%inspring,summerandautumn.Thelighte
