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| 青藏高原3种主要植被类型的表观量子效率和最大光合速率的比较 | |
| 引用本文： | 张法伟,李英年,李红琴,王勤学,杜明远,赵亮,汪诗平.青藏高原3种主要植被类型的表观量子效率和最大光合速率的比较[J].草地学报,2007,15(5):442-448. |
| 作者姓名： | 张法伟 李英年 李红琴 王勤学 杜明远 赵亮 汪诗平 |
| 作者单位： | 1. 中国科学院西北高原生物研究所,青海,西宁,810001;中国科学院研究生院,北京,100049 2. 中国科学院西北高原生物研究所,青海,西宁,810001 3. 青海大学研究生部,青海,西宁,810016 4. 日本国立环境研究所,日本,筑波,3050053 5. 日本农业环境技术研究所,日本,筑波,3058604 |
| 基金项目： | 中日合作"亚太地区环境创新战略计划(APEIS) |
| 摘 要： | 以海北高寒草甸生态系统定位站的涡度相关系统连续观测的CO2通量数据为基础,分析了青藏高原的高寒矮嵩草(Kobresia humilis)草甸、高寒金露梅(Potentilla fruticosa)灌丛草甸和高寒藏嵩草(Kobresia tibetica)沼泽化草甸等3种主要植被类型在2005年植物生长季(6-9月)的表观量子产额(a)、最大光合速率(Pmax)和呼吸速率(Reco)的变化特征.结果表明:3种植被类型白天的净生态系统CO2交换量(NEE)和光量子通量密度(PPFD)存在明显的直角双曲线关系(P＜0.05),其a、Pmax和Reco呈现出相似的季节变化趋势,在生长季初期(6月)最小,在7月或8月份达到最大;高寒矮嵩草草甸的a、Pmax和Reco大于灌丛草甸和沼泽化草甸,而后两者差别不大. |
| 关 键 词： | 青藏高原 涡度相关 表观量子产额 最大光合速率 呼吸速率 青藏高原 植被类型 表观量子效率 最大光合速率 比较 Plateau Vegetation Types Typical Rates Photosynthesis Maximum Apparent Quantum Yield 差别 高寒矮嵩草草甸 最小 变化趋势 季节 相似 曲线关系 直角 |
| 文章编号： | 1007-0435（2007）05-0442-07 |
| 收稿时间： | 2006-09-12 |
| 修稿时间： | 2007-06-25 |
The Comparative Study of the Apparent Quantum Yield and Maximum Photosynthesis Rates of 3 Typical Vegetation Types on Qinghai-Tibetan Plateau |
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| ZHANG Fa-wei,LI Ying-nian,LI Hong-qin,WANG Qin-xue,DU Ming-yuan,ZHAO Liang,WANG Shi-ping.The Comparative Study of the Apparent Quantum Yield and Maximum Photosynthesis Rates of 3 Typical Vegetation Types on Qinghai-Tibetan Plateau[J].Acta Agrestia Sinica,2007,15(5):442-448. | |
| Authors: | ZHANG Fa-wei LI Ying-nian LI Hong-qin WANG Qin-xue DU Ming-yuan ZHAO Liang WANG Shi-ping |
| Institution: | 1. Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai Province 810001, China; 2. Graduate School, Chinese Academy of Sciences, Beiiing 100049, china; 3. Graduate school, Qinghai University, Xining, Qinghai Province 810016, China; 4. National Institute for Environmental Studies, Tsukuba, 3050053, Japan; 5. National Institute of Agro-environmental Sciences, Tsukuba, 3058604, Japan |
| Abstract: | Based on the continuous CO2 flux data monitored by Eddy Covariance Method at Haibei Station, the variations of apparent quantum yield(a), maximum photosynthesis rate (Pmax), and ecosystem respiration rate (Reco) were analyzed for three vegetation types (alpine Kobresia humilis(C. A. Mey) Serg. meadow, alpine Potentilla fruticosa L. shrubland, and alpine K.tibetica Maxim. wetland) in growing season (from June to September) on the Qinghai-Tibetan Plateau. The results show that the daytime net ecosystem exchange (NEE) fitted very well with Photosynthetic photon flux density (PPFD) in a rectangular hyperbola equation in three types of vegetation ecosystems. Their a, Pmax, and Reco showed the similar seasonal changing pattern, the minimum was appeared in June and maximum in July or August; the a, Pmax and Reco of the alpine K. humilis meadow was higher than that of the other two vegetation types and no significant differences of a, Pmax, and Reco between alpine P. fruticosa shrubland and alpine K. tibetica wetland were detected. |
| Keywords: | Qinghai-Tibetan Plateau Eddy Covariance Method Apparent quantum yield Maximum photosynthesis rate Ecosystem respiration rate |
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