NAME = kazushi Hayashi ORGANIZATION = Tokyo University of Agriculture and Technology(TUAT) ADDRESS = Tokyoto, Fuchushi, Saiwaicho,3-5-8,@Faculty of Agriculture of TUAT COUNTRY = JAPAN PHONE = 042-367-5727 FAX = 042-367-6078 E-MAIL = kazushi@cc.tuat.ac.jp POSTER_ONLY = no THEME = T5 DATE = 09-Aug-04-19:03:07 ABSID = T5kH09Aug04190307 TITLE = Evapotranspiration and photosynthesis in a tropical paddy field AUTHOR_1 = Kazushi HAYASHI INSTITUTION_1 = M.Sc student PRESENTER = AUTHOR_1 AUTHOR_2 = Daisuke KOMORI INSTITUTION_2 = D.Sc student AUTHOR_3 = Attarod PEDRAM INSTITUTION_3 = D.Sc student AUTHOR_4 = Masatoshi AOKI INSTITUTION_4 = Prof.Dr AUTHOR_5 = Samakee BOONYAWAT INSTITUTION_5 = Prof.Dr AUTHOR_6 = Piyapong TONGDEENOK INSTITUTION_6 = D.Sc student AUTHOR_7 = Somboon PROMSEN INSTITUTION_7 = M.Sc student ABSTRACT = Observation of the CO2 flux in the world is one of the important approaches to solve the problem of global warming. Most of the CO2 flux studies are performed on temperate regions such as Europe and the United States; however there are few reports on tropics region located in the South East Asia. Furthermore, the CO2 flux in the tropical agricultural crops has not yet been fully understood, although it has been reported that the tropical rain forests are one of the sources of CO2 absorption. This research was accomplished to clarify the characteristics of CO2 flux using the eddy correlation technique in a Rain-fed paddy rice field which occupies extensive crop coverage in South East Asia. Moreover, in this research photosynthesis and transpiration of individual leaves in different canopy layers were measured in order to understand the mechanism of CO2 flux based on the canopy levels. The observations were conducted in a Rain-fed paddy rice field in Sukhothai, Thailand.