| 华北平原玉米田生态系统光合作用特征及影响因素 |
| |
| 引用本文： | 同小娟,李俊,刘渡.华北平原玉米田生态系统光合作用特征及影响因素[J].生态学报,2011,31(17):4889-4899. |
| |
| 作者姓名： | 同小娟 李俊 刘渡 |
| |
| 作者单位： | 1. 北京林业大学省部共建森林培育与保护教育部重点实验室,北京,100083
2. 中国科学院地理科学与资源研究所陆地水循环及地表过程实验室,北京,100101 |
| |
| 基金项目： | 国家重点基础研究发展计划 (973计划) (2010CB428404); 中央高校基本科研业务费专项资金资助(YX2011-19);北京市重点学科项目(XK100220655) |
| |
| 摘 要： | 采用涡度相关法对华北平原夏玉米田进行了连续4a(2003-2006年)的碳通量观测,结果表明:夏玉米田生态系统初始量子效率(α)、最大光合速率(Pmax)、暗呼吸速率(Rd)和总初级生产力(GPP)随作物生长发育而变化。在夏玉米生育前期和后期,α、Pmax、Rd和GPP都比较小,其最大值出现在抽穗期/灌浆期。2003-2006年,夏玉米生长季平均α、Pmax、Rd的范围分别为0.054-0.124 μmol/μmol、1.72-2.93 mg CO2 · m-2 · s-1、0.23-0.38 mg CO2 · m-2 · s-1。α、Pmax和Rd均随叶面积指数(LAI)增加呈指数增长。2003-2006年夏玉米生长季GPP总量分别为806.2、741.5、703.0、817.4 g C/m2,年际差异较大。玉米田生态系统GPP随温度升高呈指数增长。在玉米营养生长阶段,GPP随LAI增加而增大,两者之间的关系可用直角双曲线方程来表示;生殖生长阶段,GPP随LAI降低而下降.相同LAI下,生殖生长阶段的GPP明显低于营养生长阶段。
|
| 关 键 词： | 夏玉米田 光合参数 总初级生产力 涡度相关 叶面积指数 气温 |
| 收稿时间： | 7/6/2010 12:00:00 AM |
| 修稿时间： | 2011/2/14 0:00:00 |
Characteristics and controlling factors of photosynthesis in a maize ecosystem on the North China Plain |
| |
| TONG Xiaojuan,LI Jun and LIU Du.Characteristics and controlling factors of photosynthesis in a maize ecosystem on the North China Plain[J].Acta Ecologica Sinica,2011,31(17):4889-4899. |
| |
| Authors: | TONG Xiaojuan LI Jun and LIU Du |
| |
| Institution: | The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing 100083, China;Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China |
| |
| Abstract: | Light-response parameters of plant photosynthesis are important indices characterizing ecosystem productivity.Gross primary production(GPP) is one of the most basic energetic and biogeochemical characteristics of an ecosystem.The study of plant photosynthesis at the canopy and ecosystem scales is improved by using micrometeorological methods such as the eddy covariance technique.To investigate photosynthesis and its light-response characteristics,CO2 flux was continuously measured using the eddy covariance ... |
| |
| Keywords: | maize ecosystem light response parameter gross primary production eddy covariance leaf area index air temperature |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《生态学报》浏览原始摘要信息 |
| 点击此处可从《生态学报》下载免费的PDF全文 |
|
