| 云南马龙县山地草甸植物优势度及优势植物光合特征研究 |
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| 引用本文： | 李世玉,毕玉芬.云南马龙县山地草甸植物优势度及优势植物光合特征研究[J].草原与草坪,2005(6):33-36. |
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| 作者姓名： | 李世玉 毕玉芬 |
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| 作者单位： | 云南农业大学,草业科学系,云南,昆明,650201;云南农业大学,草业科学系,云南,昆明,650201 |
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| 基金项目： | 云南省自然科学基金;云南省自然科学基金 |
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| 摘 要： | 以云南马龙县退化山地草甸为研究对象,对其草地群落数量特征及优势植物的光合特性进行了研究。结果表明:8个不同种群的净光合速率(Pn)依次为:白茅>西南委陵菜>火绒草>矮生胡枝子>白健秆>西南杭子梢>丝叶球柱草>山苦荬;CO2固定能力的强弱顺序与Pn相同;群落数量特征与净光合速率(Pn)成正相关,其显著性水平依次为:相对干重(r=0.959 1)>重要值(r=0.869 9)>相对盖度(r=0.829 5)>相对频度(r=0.755 1)>相对密度(r=0.585 4)>相对高度(r=0.283 5)。
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| 关 键 词： | 山地草甸 光合特性 优势度 |
| 文章编号： | 1009-5500（2005）06-0033-04 |
| 收稿时间： | 2005-03-27 |
| 修稿时间： | 2005-07-14 |
Plants dominance and photosynthetic characteristics of dominant plants of montane meadow in Malong region of Yunnan |
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| LI Shi-yu,BI Yu-fen.Plants dominance and photosynthetic characteristics of dominant plants of montane meadow in Malong region of Yunnan[J].Grassland and Turf,2005(6):33-36. |
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| Authors: | LI Shi-yu BI Yu-fen |
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| Institution: | Department of Pratacultural Science, Yunnan Agricultural University, Kunming 650201, China |
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| Abstract: | Photosynthetic characteristics of dominant species of degraded montane meadow in Malong region of Yunnan Province were studied.The results showed that the net photosynthetic rate(Pn) order of the eight species was: Imperata cylindrical>Potentilla fulgens>Leontopodium leontopodiodes>Lespedeza forrestii>Eulalia pallens>Campylotropis delavayi>Bulbostylis densa>Ixeris chinensis.The CO_(2) fixation abilities were in the same order as Pn.The relation between community quantity characteristics and Pn were positive,and the order of relation coefficient was: relatively biomass(W′,r=0.9591)>IV(r=0.8699)>relatively coverage(C′,r=0.8295)>relatively frequency(F′,r=0.7551)>relatively density(D′,r=0.5854)>relatively height(H′,r=0.2835). |
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| Keywords: | montane meadow photosynthetic eharaeteristic dominance |
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