B43H-0637
Does sun-induced Chlorophyll fluorescence well capture canopy photosynthesis in a rice paddy?
Thursday, 17 December 2015
Poster Hall (Moscone South)
Hyungsuk Kimm1, Youngryel Ryu2, Minseok Kang2 and Joon Kim2, (1)Seoul National University, Department of Landscape Architecture and Rural Systems Engineering, Seoul, South Korea, (2)Seoul National University, Seoul, South Korea
Abstract:
Sun-induced chlorophyll fluorescence (SiF) has emerged as a convincing indicator of carbon assimilation rates under diverse environmental conditions. Here, we present a continuous observation system of SiF at a sporadically irrigated rice paddy site in South Korea. Our site also includes automatic observation systems for eddy covariance, water table depth, and spectral sensors which are composed of LED sensors, and RGB- and NIR cameras. Additionally, we conducted manual observations of photosynthetic parameters (Li-6400), leaf area index (LAI-2200), NDVI and PRI (ASD FieldSpec) once per ten days on average. By analyzing manual- and automatic field observations, we quantify carbon budget of the site. Finally, we investigate how accurately SiF detects canopy photosynthesis, and discuss what factors mainly control canopy photosynthesis.
