主办单位：中国气象局沈阳大气环境研究所
国际刊号：ISSN 1673-503X
国内刊号：CN 21-1531/P
气象与环境学报

气象与环境学报 ›› 2015, Vol. 31 ›› Issue (1): 84-89.doi:

• 论文 • 上一篇    下一篇

华北冬小麦品种演变过程中CO2补偿点变化分析

邱美娟1,3 刘建栋1 邬定荣1 刘玲1 毕建杰2   

  1. 1. 中国气象科学研究院，北京 100081；2. 山东农业大学，山东 泰安 271017； 3.吉林省气象科学研究所，吉林 长春 130062
  • 出版日期:2015-02-28 发布日期:2015-02-28

Analysis of compensation point variation to CO2 with different varieties of winter wheat in North China

QIU Mei-juan1,3  LIU Jian-dong1  WU Ding-rong1  LIU Ling1  BI Jian-jie2   

  1. 1. Chinese Academy of Meteorological Sciences, Beijing 100081, China; 2. Shandong Agricultural University, Taian 271017, China; 3. Jilin Institute of Meteorological Science, Changchun 130062, China
  • Online:2015-02-28 Published:2015-02-28

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摘要：

CO2补偿点是作物生长模型中最基本的关键模型参数之一，本文利用Licor-6400便携式光合作用测定仪，对1949年以前和1949—2005年中国华北地区不同年代冬小麦主要品种的生理生态参数进行大量的系统测定，在此基础上，对华北地区不同冬小麦品种的光合作用模型进行拟合，以确定不同年代不同品种冬小麦CO2的补偿点。结果表明：中国华北地区冬小麦CO2补偿点随光强升高而降低，在800 μmol·m-2·s-1光量子通量密度条件下，野生麦种CO2补偿点最高，达123.40 μmol·mol-1。1949—2005年华北地区不同冬小麦品种中泰山1号CO2补偿点最高，达107.07 μmol·mol-1；红秃头CO2补偿点最低，为57.25 μmol·mol-1；不同品种冬小麦CO2补偿点最高值和最低值差值为49.82 μmol·mol-1，说明华北地区冬小麦随品种演化CO2补偿点变化明显。建立了中国华北地区7个典型冬小麦品种包含CO2因子的直角双曲线光合作用模型，确定了不同年代不同品种冬小麦CO2的补偿点，为进一步建立包含CO2直接作用的气候变化影响评估机理模型提供基础数据。

关键词: CO2补偿点, 冬小麦, 生理生态参数, 作物生长模型

Abstract:

 Compensation point to CO2 is one of the key parameters for crop growth model. Systematic measurements of parameters for physiological-ecology of different varieties of winter wheat before 1949 and from1949 to 2005 in North China were conducted using a Licor-6400. Based on these measurements, rectangular hyperbolic photosynthetic models of different winter wheat varieties in North China involving the function of CO2 were fitted in order to determine compensation point to CO2 in different varieties in different time. The results indicate that the compensation point to CO2 decreases with increase of photosynthetic photon flux density (PPFD) in the North China. Under 800 μmol·m-2·s-1 PPFD conditions, the compensation point to CO2 of the wild variety is the highest, reaching 123.40 μmol·mol-1. During 1949-2005, the compensation point to CO2 varies obviously with varieties, with the highest value of 107.07 μmol·m-2·s-1 for Taishan No.1 variety and the lowest value of 57.25 μmol·mol-1 for Hongtutou variety. Difference of maximum and minimum values between different varieties of winter wheat reaches 49.82 μmol·mol-1, and it suggests that compensation point to CO2 changes significantly with evolution of winter wheat varieties in North China. The study establishes rectangular hyperbolic photosynthetic models of seven typical winter wheat varieties in the North China involving the function of CO2, and identifies the compensation point to CO2, which provide the basic data set to develop crop models for evaluation of impact of climate change on agriculture in North China.

Key words:  Compensation point to CO2, Winter wheat, Parameters for physiological-ecology, Crop growth model