JapanFlux2024 JP-Hc3 Hachihama Experimental Farm: Double Crop

Paddy fields are a characteristic agricultural crop in Asia, accounting for 54% of the total arable land area in Japan.The carbon budget of paddy ecosystems is greatly influenced by irrigation water management, compost application, tillage, and post-harvest residue disposal.Among them, irrigation water management is a unique cultivation management for paddy fields, and decomposition of organic matter under anaerobic soil conditions promotes CH4 production.In addition, Asian paddy fields are characterized by mono-cropping (one crop per year) and double cropping (wheat and rapeseed as a back crop),The differences in cropping systems also contribute to the carbon budget.Differences in cropping systems also have a significant impact on the carbon budget.We observed sensible heat, latent heat and CO2 fluxes in a barley-paddy rice double cropping system using the eddy correlation method.The observation was conducted in a privately owned barley-paddy rice double cropping field in Tamano City, Okayama Prefecture.It is 1.5 km away from Hachihama Farm, which is affiliated with the Faculty of Agriculture, Okayama University, in a straight line.The measurements were conducted when the principal investigator belonged to Faculty of Environmental Science and Technology, Okayama University.