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应用生态学报 ›› 2016, Vol. 27 ›› Issue (11): 3585-3592.doi: 10.13287/j.1001-9332.201611.033

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气孔导度模型在北方农牧交错带的适用性评价——以马铃薯和油葵为例

黄明霞1, 王靖1*, 唐建昭1, 于强2, 张君1, 薛庆禹3, 常清1,4, 谈美秀1   

  1. 1中国农业大学资源与环境学院, 北京 100193;
    2西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌 712100;
    3天津市气候中心, 天津 300074;
    4山西省气象服务中心, 太原 030002
  • 收稿日期:2016-03-08 出版日期:2016-11-18 发布日期:2016-11-18
  • 通讯作者: E-mail: wangj@cau.edu.cn
  • 作者简介:黄明霞,女,1992年生,硕士研究生.主要从事农业气象研究.E-mail: 1959837491@qq.com
  • 基金资助:
    本文由国家科技支撑计划项目(2012BAD09B02)、公益性行业(气象)科研专项(GYHY20150616)和中央高校基本科研业务费专项(2015ZH002)资助

Suitability of four stomatal conductance models in agro-pastoral ecotone in North China: A case study for potato and oil sunflower.

HUANG Ming-xia1, WANG Jing1*, TANG Jian-zhao1, YU Qiang2, ZHANG Jun1, XUE Qing-yu3, CHANG Qing1,4, TAN Mei-xiu1   

  1. 1College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China;
    2State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, Shaanxi, China;
    3Tianjin Climate Center, Tianjin 300074, China;
    4Shanxi Meteorological Service Centre, Taiyuan 030002, China
  • Received:2016-03-08 Online:2016-11-18 Published:2016-11-18
  • Contact: E-mail: wangj@cau.edu.cn
  • Supported by:
    This work was supported by the National Science & Technology Support Plan of China (2012BAD09B02), the Special Scientific Research Fund in the Public Interest (GYHY20150616), and the Fundamental Research Funds for the Central Universities (2015ZH002).

摘要: 基于北方农牧交错带主要作物马铃薯和油葵的叶片气孔导度、净光合速率和气象因子的平行观测数据,对常用气孔导度模型(Jarvis模型、Ball-Berry模型、Leuning模型和Medlyn模型)进行了适用性评价.结果表明:马铃薯的气孔导度与净光合速率呈现较强的线性关系,而油葵气孔导度与净光合速率的线性关系较弱.对于马铃薯气孔导度,Ball-Berry模型模拟效果最佳,Leuning模型和Medlyn模型次之,Jarvis模型模拟效果最差;各模型的模拟值与观测值的均方根误差(RMSE)分别为0.0331、0.0371、0.0456和0.0794 mol·m-2·s-1,归一化均方根误差(NRMSE)分别为26.8%、30.0%、36.9%和64.3%,拟合度(R2)分别为0.96、0.61、0.91和0.88.对于油葵的气孔导度,Jarvis模型模拟效果略好于Ball-Berry模型、Medlyn模型和Leuning模型,其RMSE分别为0.2221、0.2534、0.2547和0.2758 mol·m-2·s-1,NRMSE分别为40.3%、46.0%、46.2%和50.1%,R2分别为0.38、0.22、0.23和0.20.气象因子对气孔导度作用的通径分析表明,北方农牧交错带马铃薯和油葵气孔导度日变化主要受饱和水汽压差影响.模型评价结果表明用于油葵的气孔导度模型需要进一步改进.

Abstract: The suitability of four popular empirical and semi-empirical stomatal conductance models (Jarvis model, Ball-Berry model, Leuning model and Medlyn model) was evaluated based on para-llel observation data of leaf stomatal conductance, leaf net photosynthetic rate and meteorological factors during the vigorous growing period of potato and oil sunflower at Wuchuan experimental station in agro-pastoral ecotone in North China. It was found that there was a significant linear relationship between leaf stomatal conductance and leaf net photosynthetic rate for potato, whereas the linear relationship appeared weaker for oil sunflower. The results of model evaluation showed that Ball-Berry model performed best in simulating leaf stomatal conductance of potato, followed by Leuning model and Medlyn model, while Jarvis model was the last in the performance rating. The root-mean-square error (RMSE) was 0.0331, 0.0371, 0.0456 and 0.0794 mol·m-2·s-1, the normalized root-mean-square error (NRMSE) was 26.8%, 30.0%, 36.9% and 64.3%, and R-squared (R2) was 0.96, 0.61, 0.91 and 0.88 between simulated and observed leaf stomatal conductance of potato for Ball-Berry model, Leuning model, Medlyn model and Jarvis model, respectively. For leaf stomatal conductance of oil sunflower, Jarvis model performed slightly better than Leuning model, Ball-Berry model and Medlyn model. RMSE was 0.2221, 0.2534, 0.2547 and 0.2758 mol·m-2·s-1, NRMSE was 40.3%, 46.0%, 46.2% and 50.1%, and R2 was 0.38, 0.22, 0.23 and 0.20 between simulated and observed leaf stomatal conductance of oil sunflower for Jarvis model, Leuning model, Ball-Berry model and Medlyn model, respectively. The path analysis was conducted to identify effects of specific meteorological factors on leaf stomatal conductance. The diurnal variation of leaf stomatal conductance was principally affected by vapour pressure saturation deficit for both potato and oil sunflower. The model evaluation suggested that the stomatal conductance models for oil sunflower are to be improved in further research.