| 杉木不同部位、叶龄针叶净光合效率特征 |
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| 引用本文： | 许忠坤,徐清乾,荣建平.杉木不同部位、叶龄针叶净光合效率特征[J].湖南林业科技,2008,35(5). |
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| 作者姓名： | 许忠坤 徐清乾 荣建平 |
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| 作者单位： | 1. 湖南省林业科学院,湖南,长沙,410004
2. 攸县林业科学研究所,湖南,株溯,412300 |
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| 摘 要： | 对6年生杉木人工纯林进行光合作用测定，不同部位针叶单位面积同化CO2净量变化规律是上部〉中部〉下部，不同部位针叶总面积同化CO2净量变化规律是中部〉上部〉下部，不同部位针叶同化CO2能力差异显著。不同叶龄针叶单位面积同化CO2净量变化规律是当年生〉一年生〉二年生〉三年生，不同叶龄针叶间同化CO2能力差异极显著。被测定株间单位面积同化CO2净量差异极显著。下部、中部、上部针叶面积分别为总面积的35．8％、40．0％、24．2％。当年生、一年生、二年生、三年生针叶面积分别为总面积的34．7％、33．9％、20．2％、11．2％。下部、中部、上部针叶同化CO2净量分别为总数的29．8％、38．1％、32．1％；当年生、一年生、二年生、三年生针叶同化CO2净量分别为总数的43．8％、32．7％、16．0％、7．5％。
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| 关 键 词： | 杉木 针叶部位 叶龄 净光合效率 叶面积 |
The characters of leaf area and net photosynthesis efficiency of needle at different parts and in different leaf age of Cunninghamia lanceolata |
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| XU Zhongkun,XU Qingqian,RONG Jianping.The characters of leaf area and net photosynthesis efficiency of needle at different parts and in different leaf age of Cunninghamia lanceolata[J].Hunan Forestry Science & Technology,2008,35(5). |
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| Authors: | XU Zhongkun XU Qingqian RONG Jianping |
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| Institution: | XU Zhongkun1,XU Qingqian1,RONG Jianping2(1.Hunan Forestry Academy,Changsha 410004,China,2.Forestry Institute of You County,Zhuzhou 412300,China) |
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| Abstract: | Photosynthesis in Cunninghamia lanceolata of 6 years old of pure plantation forest was measured.Assimilation net amount of carbon dioxide on different parts needle of unit area ranked from high to low as following:middle > upper >lower,and the difference of assimilation ability on different parts needle was significant.Assimilation net amount of carbon dioxide on different leaf age needle of unit area ranked from high to low as following:same-year-old > one-year-old > two-year-old > three-year-old,and the d... |
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| Keywords: | Chinese Fir(Cunninghamia lanceolata) needle leaf age net photosynthesis efficiency leaf area |
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