Response of Photosynthesis Physiological Characteristics of Predominant Species to Simulated Photosynthetic Radiation Intensity in Yunwu Mountain Grassland

HU Xiang-ming; WANG Xi-ying; CHENG Ji-min; WAN Hui-e; ZHAO Yan-yun

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Response of Photosynthesis Physiological Characteristics of Predominant Species to Simulated Photosynthetic Radiation Intensity in Yunwu Mountain Grassland

- Response of Photosynthesis Physiological Characteristics of Predominant Species to Simulated Photosynthetic Radiation Intensity in Yunwu Mountain Grassland
- Bulletin of Soiland Water Conservation Vol. 27, Issue 4, Pages: 33-37(2008)
- 作者机构：
  
  1. 滨州学院城市与环境系山东省黄河三角洲生态环境重点实验室,山东,滨州,256603
  2. 滨州市人民医院,山东,滨州,256600
  3. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
- 作者简介：
- 基金信息：
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- Published：2008
- 稿件说明：
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HU Xiang-ming, WANG Xi-ying, CHENG Ji-min, et al. Response of Photosynthesis Physiological Characteristics of Predominant Species to Simulated Photosynthetic Radiation Intensity in Yunwu Mountain Grassland[J]. Bulletin of Soiland Water Conservation, 2008, 27(4): 33-37.
DOI：

HU Xiang-ming, WANG Xi-ying, CHENG Ji-min, et al. Response of Photosynthesis Physiological Characteristics of Predominant Species to Simulated Photosynthetic Radiation Intensity in Yunwu Mountain Grassland[J]. Bulletin of Soiland Water Conservation, 2008, 27(4): 33-37. DOI：

摘要

研究了云雾山自然保护区主要优势种的光合生理特性对模拟光强的响应。研究结果表明

随光照强度的增加

4种植物的光合速率先增大后减少

蒸腾速率增加。本氏针茅的水分利用效率先增大后减少

铁杆蒿、大针茅和厚穗冰草的WUE呈一直增大趋势。4种植物的光合速率和水分利用效率在生长旺季7月份最大

生长末季9月份最小;蒸腾速率则表现为8月份最大。不同植物间最大光合速率的顺序为铁杆蒿>大针茅>厚穗冰草>本氏针茅;蒸腾速率大小顺序为本氏针茅>厚穗冰草>大针茅>铁杆蒿;水分利用效率的顺序为铁杆蒿>厚穗冰草>大针茅>本氏针茅。叶绿素荧光参数表明

随光强的增加

光能捕获效率(Fv′/Fm′)、实际光化学效率(PhiPSⅡ)和PhiCO

降低

热耗散(NPQ)上升。

Abstract

Response of the eco-physiological characteristics to simulated photosynthetic radiation intensity in Stipa bungeana

A rtemisia sacrorum

Stipa grandis

A neurolepidium dasystachys leaves was investigated.Results showed that with increasing irradiation

Photosynthetic rate( Pn) was increased in lower density irradiation

but was reduced in higher density irradiation.transpiration rate( Tr) rate was enhanced with increasing irradiation.WUE for Stipa bungeana rose with increasing irradiation at first and then declined despite the intensified irradiation.WUE for Stipa grandis

A rtemisia sacrorum

and A neurolepidium dasystachys were enhanced with irradiation gradually.With growth midseason

Pn and WUE of the four species reached a maximum in July and a minimum in September

while Tr reached a maximum in August.The species ranked in the descendant order of A rtemisia sacrorum

Stipa grandis

A neurolepidium dasystachys

and Stipa bungeana in terms of the max Pn ; in the descendant order of Stipa bungeana

A neurolepidium dasystachys

Stipa grandis

and A rtemisia sacrorum in terms of Tr ; and in the descendant order of A rtemisia sacrorum

A neurolepidium dasystachys

Stipa grandis

and Stipa bungeana in terms of WUE.The chlorophyll fluorescence parameter indicated that the conversion efficiency of primary light energy under light ( Fv’/Fm’) of PSII

actual PSII efficiency (PhiPSII)

and PhiCO2 declined in line with the CO2 concentration

but the nonphotochemical quenching coefficient (NPQ) ascended.

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Related Author

HU Xiang-ming

WANG Xi-ying

CHENG Ji-min

WAN Hui-e

ZHAO Yan-yun

Related Institution

Department of Urban and Environment, and Key Laboratory for Eco-environment Sciences of the Yellow River Delta of Shandong Province, Binzhou University

General Hospital of Binzhou City

Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling

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