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梅杰娜,李荣生,杨锦昌,邹文涛
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广东省林木种苗管理总站,中国林业科学研究院热带林业研究所,中国林业科学研究院热带林业研究所,中国林业科学研究院热带林业研究所
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摘要: |
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米老排林下种植6年的黄藤主茎长为0.28?0.04 m，产生萌茎的植株占48%，平均拥有萌茎1.3?0.2条，远远低于相邻间伐50%的马尾松林下的黄藤；黄藤植株晴天全天得到的有效光合辐射和相应的净光合速率最高为0.6 μmol?m-2?s-1和0.05 μmol CO2?m-2?s-1，远远低于空旷地上的1 539 μmol?m-2?s-1和3.11 μmol CO2 ?m-2?s-1，表明米老排林下黄藤生长缓慢，可能与其得到的有效光合辐射较低有关，若在米老林下间种黄藤需进行间伐以增加透光。
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关键词:
黄藤〓米老排〓生长〓光合特征
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DOI：
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分类号：
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基金项目：国家林业科技成果推广计划项目“单叶省藤和黄藤高效培育技术推广”；国家星火计划项目“棕榈藤人工林集约经营与采收技术应用开发”。 |
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Growth Performance and Photosynthesis of Daemonorops margaritae planted =in a Mytilaria laosensis plantation |
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Mei Jiena,Li Rongsheng,Yang Jinchang and Zou Wentao
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Research Institute of Tropical Forestry,Chinese Academy of Forestry,Research Institute of Tropical Forestry,Chinese Academy of Forestry,Research Institute of Tropical Forestry,Chinese Academy of Forestry
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Abstract: |
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Growth performance and photosynthesis were determined for Daemonorops margaritae at 6 years after planting in a plantation of Mytilaria laosensis. Its stem length was 0.28?0.04 m, ca. 5 m shorter than that in a plantation of Pinus massoniana. The net photosynthesis rate was highest at 3.11 μmol CO2 ?m-2?s-1 when leaves were lighted with a 1500 μmol?m-2?s-1 of photosynthetically active radiation (PAR). However, the PAR and the net photosynthetic rate in a sunny winter day were low for D. margaritae, ranging from 0 to 0.6 μmol?m-2?s-1 and -1.1 to 0.05 μmol CO2 ?m-2?s-1, respectively. It was concluded that the canopy of the plantation of M. laosensis shaded too much light for D. margaritae, therefore D. margaritae should be not planted in a plantation of M. laosensis if cane production was targeted.
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Key words:
Daemonorops margaritae, Mytilaria laosensis, growth, photosynthesis
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