不同植物叶片水分利用效率对光和CO_2的响应与模拟——英文.pdfVIP

ACTA ECOLOGICA SINICA Volume 28, Issue 2, February 2008 Online English edition of the Chinese language journal Cite this article as: Acta Ecologica Sinica, 2008, 28(2), 525−533. RESEARCH PAPER Responses of water use efficiency of 9 plant species to light and CO and their modeling 2 1 2,*, Fang Quanxiao1 1 3 2 Wang Jianlin , Yu Guirui , Jiang Defeng , Qi Hua , Wang Qiufeng 1 Qingdao Agricultural University, Qingdao 266109, China 2 Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China 3 Shenyang Agricultural University, Shenyang 110161, China Abstract: Photosynthesis coupled with transpiration determines water use efficiency ( WUE) at leaf level, and the responses of WUE controlled by gas exchanges through stomata to environment are the basis of carbon and water cycles in the ecosystem. In this paper, by using Li-6400 Portable Photosynthesis System (LI-COR), WUE at leaf level was analyzed under controlled photosynthetic photons flux density (PPFD) and CO2 concentration conditions across 9 plant species including maize (Zea mays), sorghum (Sor- ghum vulgare), millet (Setaria italica), soybean (Glycine max), peanut (Arachis phyogaea), sweet potato (Ipomoea batatas), rice (Oryza sativa), Masson pine (Pinus massoniana) and Schima superba. We had developed a new model to estimate the water use effi- ciency in response to the combined effects of light and CO2 concentration. Our measured data validated that this model could simu- late the changes of water use efficiency very well under combined effect of light and CO2 concentr