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Position: Home > Articles > The Research on Growth Environment and Photosynthetic Characteristics of Carya cathyensis Sarg Sapling Chinese Agricultural Science Bulletin 2011,27 (4) 17-20

大别山山核桃幼树生长环境及其光合特性研究

作  者:
程龙飞;李宝华;胡振华;刘格明
单  位:
泗阳县林业中心
关键词:
山核桃;幼树;生长环境;光合特性
摘  要:
使用LI-6400便携式光合作用测定系统,对大别山山核桃幼树的光合特性进行了研究。结果表明:在夏季,大别山山核桃幼树叶片净光合速率的日变化呈双峰型,有明显的"光合午休"现象,其光饱和点约为339μmol/(m2·s),光补偿点约为33.2μmol/(m2·s);在控制光照强度和温度的条件下,升高CO2浓度可提高大别山山核桃的净光合速率,提高幼树叶片对光能的利用率,CO2饱和点约为1200μL/L,补偿点约为60~70μL/L;对高温(>25℃)的反应敏感,属中性植物。调查地区的环境条件基本能够满足大别山山核桃的生长需求。
译  名:
The Research on Growth Environment and Photosynthetic Characteristics of Carya cathyensis Sarg Sapling
作  者:
Cheng Longfei,Li Baohua,Hu Zhenhua,Liu Geming (Forestry Center of Siyang,Siyang Jiangsu 223700)
关键词:
Carya cathyensis Sarg;sapling;growth environment;photosynthetic characteristics
摘  要:
The LI-6400 Portable photosynthesis was used to study the photosynthetic characteristics in leaveso f Carya cathyensis Sarg sapling.The results showed that the daily variation of net photosynthetic rate in leavesp resented a bimodal curve,and there was an obvious'midday depression'phenomenon,the light saturationp oint was about 339μmol/(m 2 ·s),the light compensation point was about 33.2μmol/(m 2 ·s).Under the condition of optimum light intensity and temperature,elevation of CO 2 concentration increased the Pn and the efficiency of high utilizing in Carya cathyensis Sarg sapling.The CO 2 saturation point was about 1200μL/L andC O 2 compensation point was about 60~70μL/L.The photosynthesis was more sensitive to the highert emperature(>25℃),belonging to neutral plant.The environmental conditions of the research are as could meet the basic needs of Carya cathyensis Sarg sapling's growth.

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