Photosynthetic Characteristics of Eleven Precious Broad?leaved Tree Species in South Subtropics
Author(s): GUO Fang-chen, LIU Shi-rong, WEN Yuan-guang, TANG Jing-chao, CAI Dao-xiong, Ming An-gang, SHI Zuo-min, LEI Li-qun, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Forestry College of Guangxi University, Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Guangxi Youyiguan Forest Ecosystem Research Station, Experiment Center of Tropical Forestry, Chinese Academy of Forestry
Pages: 606-611
Year: 2015 Issue: 6
Journal: Guangxi Sciences
Keyword: precious broad leaved tree species; photosynthetic characteristics; south subtropics;
Abstract: 【Objective】In order to acquire the photosynthetic characteristics of precious tree species in south subtropical zone,the eleven tree species that were commonly planted were selected for physiological study.【Methods】Light response curves and CO2 response curves of thesetree species were measured by Li-6400 portable photosynthesis system.The curvilinear model was used for calculating the parameters of photosynthetic characteristics of these tree species,and then their comparisons of the physiological parameters were analyzed among the eleven tree species.【Results】The photosynthetic characteristic parameters have obvious differences among the eleven precious tree species.The maximum net photosynthetic rate of the tree species ranges from 7.00μmol·m-2·s-1 to 18.19μmol·m-2·s-1,and the average value is 10.83μmol·m-2·s-1.The maximum net photosynthetic rate is highest for Tectona grandis(18.19μmol·m-2·s-1),followed by Mytilaria laosensis(13.07μmol·m-2·s-1),Castanopsis hystrix(12.60μmol·m-2·s-1),Dalbergia odorifera(11.63μmol·m-2·s-1),Michelia hedyosperma(11.29μmol· m-2·s-1),Manglietia glauce(10.85μmol· m-2·s-1),Tsoongiodendron odorum(10.64μmol· m-2· s-1),Erythrophleum fordii(8.90μmol·m-2·s-1),Parashorea chinensis(7.72μmol·m-2·s-1),Paramichelia baillonii(7.22μmol· m-2·s-1),and Mesua ferrea(7.00μmol· m-2·s-1).Tectona grandis,Mytilaria laosensis and Castanopsis hystrix have relatively higher photosynthetic capacity,while Parashorea chinensis,Mesua ferreaand Paramichelia baillonii have lower photosynthetic ability.Mesua ferrea,Tectona grandis and Dalbergia odorifera have relatively higher adptability in high photosynthetic active radiation,whilie Manglietia glauce and Paramichelia baillonii have lower adaptability.Erythrophleum fordii,Castanopsis hystrix and Michelia hedyosperma have relativerly higher utilization capacity in low photosynthetic active radiation,while Paramichelia baillonii,Parashorea chinensis,Tsoongiodendron odorum and Mytilaria laosensis have lower capacity.【Conclusion】Tree species with higher photosynthetic capacity can be selected for afforestation under the changes of global climates.The tree species with higher utilization capacity in low photosynthetic active radiation like Erythrophleum fordii,Castanopsis hystrixand Michelia hedyospermaperform better in close-to-nature management for P.massonianaand C.lanceolata monoculture plantations.
Pages: 606-611
Year: 2015 Issue: 6
Journal: Guangxi Sciences
Keyword: precious broad leaved tree species; photosynthetic characteristics; south subtropics;
Abstract: 【Objective】In order to acquire the photosynthetic characteristics of precious tree species in south subtropical zone,the eleven tree species that were commonly planted were selected for physiological study.【Methods】Light response curves and CO2 response curves of thesetree species were measured by Li-6400 portable photosynthesis system.The curvilinear model was used for calculating the parameters of photosynthetic characteristics of these tree species,and then their comparisons of the physiological parameters were analyzed among the eleven tree species.【Results】The photosynthetic characteristic parameters have obvious differences among the eleven precious tree species.The maximum net photosynthetic rate of the tree species ranges from 7.00μmol·m-2·s-1 to 18.19μmol·m-2·s-1,and the average value is 10.83μmol·m-2·s-1.The maximum net photosynthetic rate is highest for Tectona grandis(18.19μmol·m-2·s-1),followed by Mytilaria laosensis(13.07μmol·m-2·s-1),Castanopsis hystrix(12.60μmol·m-2·s-1),Dalbergia odorifera(11.63μmol·m-2·s-1),Michelia hedyosperma(11.29μmol· m-2·s-1),Manglietia glauce(10.85μmol· m-2·s-1),Tsoongiodendron odorum(10.64μmol· m-2· s-1),Erythrophleum fordii(8.90μmol·m-2·s-1),Parashorea chinensis(7.72μmol·m-2·s-1),Paramichelia baillonii(7.22μmol· m-2·s-1),and Mesua ferrea(7.00μmol· m-2·s-1).Tectona grandis,Mytilaria laosensis and Castanopsis hystrix have relatively higher photosynthetic capacity,while Parashorea chinensis,Mesua ferreaand Paramichelia baillonii have lower photosynthetic ability.Mesua ferrea,Tectona grandis and Dalbergia odorifera have relatively higher adptability in high photosynthetic active radiation,whilie Manglietia glauce and Paramichelia baillonii have lower adaptability.Erythrophleum fordii,Castanopsis hystrix and Michelia hedyosperma have relativerly higher utilization capacity in low photosynthetic active radiation,while Paramichelia baillonii,Parashorea chinensis,Tsoongiodendron odorum and Mytilaria laosensis have lower capacity.【Conclusion】Tree species with higher photosynthetic capacity can be selected for afforestation under the changes of global climates.The tree species with higher utilization capacity in low photosynthetic active radiation like Erythrophleum fordii,Castanopsis hystrixand Michelia hedyospermaperform better in close-to-nature management for P.massonianaand C.lanceolata monoculture plantations.
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