基于SVAT模型的冬小麦光合作用和蒸散过程研究

应用生态学报 ›› 2002, Vol. ›› Issue (11): 1394-1398.

基于SVAT模型的冬小麦光合作用和蒸散过程研究

莫兴国, 刘苏峡, 林忠辉

中国科学院地理科学与资源研究所, 北京, 100101

收稿日期:2001-01-15 修回日期:2001-05-08
通讯作者: 莫兴国,男,1966年生,博士,副研究员,主要从事生态系统物质和能量交换过程的模拟与试验研究.E-mail:moxg@igsnrr.ac.cn
基金资助:
国家自然科学基金重大项目(49890330);中国科学院地理科学与资源研究所创新资助项目(CXIOGC000501).

MO Xingguo, LIU Suxia, LIN Zhonghui

Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101

Received:2001-01-15 Revised:2001-05-08

摘要/Abstract

摘要： 在已建立的土壤植被大气传输(SVAT)模型中,冠层光合作用/气孔导度耦合子模型可区分遮荫叶和受光叶光合作用强度的差异;作物生长子模型考虑了作物生长呼吸和维持呼吸.模拟与实测结果对比发现,日总蒸散量实测和模拟的根均方差(RMSD)为0.65mm,平均绝对差(MAPD)为14%;对冠层上部净光合作用率日变化过程而言,实测和模拟结果具有较好的一致性.利用模型模拟了冬小麦全生育期净光合作用率和蒸散的演变过程.最后,分析了冬小麦蒸散和水分利用效率对不同最大叶面积指数、大气CO₂浓度和叶片N含量的响应.

关键词: 光合作用, 蒸散, 水分利用效率, 产量, 冬小麦, 氨挥发, 水氮互作

Abstract: Two submodels were added to the developed soil vegetation atmosphere transfer model. Of the two sub models, one was the canopy photosynthesis/stomatal coupled sub model distinguishing the sun light and shaded leaves, and the second was the simplified growth sub model considering growth respiration and maintenance respiration. The comparison of measured and simulated daily evapotranspiration showed that the RMSD (root mean standard deviation) of model prediction to observation was 0.65 mm, and MAPD (mean absolute percent difference) was 14%. The daily course of the simulated and measured photosynthesis rates at the top of canopy were in good consistency. With the high resolution meteorological data, the canopy net photosynthesis and evapotranspiration were simulated over the whole growing season.The sensitivities of maximum leaf area index, environmental CO₂ concentration and leaf nitrogen content to evapotranspiration and water use efficiency were also analyzed.

Key words: water and nitrogen interaction, ammonia volatilization, winter wheat, yield.

中图分类号:

Q945.11

莫兴国, 刘苏峡, 林忠辉. 基于SVAT模型的冬小麦光合作用和蒸散过程研究[J]. 应用生态学报, 2002, (11): 1394-1398.

MO Xingguo, LIU Suxia, LIN Zhonghui. [J]. Chinese Journal of Applied Ecology, 2002, (11): 1394-1398.

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