Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: High potential for increase in CO2 flux from forest soil surface due to global warming in cooler areas of Japan. | Ann. For. Sci. 63 2006 537-546 537 INRA EDP Sciences 2006 DOI forest 2006036 Original article High potential for increase in CO2 flux from forest soil surface due to global warming in cooler areas of Japan Shigehiro ISHlZUKAa b Tadashi SAKATAa b Satoshi SAWATAc Shigeto IKEDAb d Chisato TAKENAKAe Nobuaki TAMAle f Hisao SAKAla g Takanori SHlMlZUh Kensaku Kan-Na Shin-ichi ONODERAj Nagaharu TANAKAa Masamichi TAKAHASHIb a Hokkaido Research Center Forestry and Forest Products Research Institute 7 Hitsujigaoka Sapporo Hokkaido 062-8516 Japan b Forestry and Forest Products Research Institute Tsukuba Ibaraki 305-8687 Japan c Akita Prefecture Forest Technology Center Akita Akita 019-2611 Japan d Tohoku Research Center Forestry and Forest Products Research Institute Morioka Iwate 020-0123 Japan e Graduate School of Bioagricultural Sciences Nagoya University Nagoya Aichi 464-8601 Japan f Mizuho Information and Research Institute Inc. Tokyo 101-8443 Japan g Kiso Experimental Station Forestry and Forest Products Research Institute Kisogun Nagano 397-0001 Japan h Kyushu Research Center Forestry and Forest Products Research Institute Kumamoto Kumamoto 860-0862 Japan Okinawa Prefecture Forestry Experiment Station Nago Okinawa 905-0017 Japan j Hiroshima University Higashi Hiroshima Hiroshima 739-8521 Japan Received 8 December 2005 accepted 22 February 2006 Abstract - The CO2 fluxes from the forest floor were measured using a closed chamber method at 26 sites from 26 N Lat. to 44 N Lat. in Japan. Seasonal fluctuation in CO2 flux was found to correlate exponentially with seasonal fluctuation in soil temperature at each site. Estimate of annual carbon emission from the forest floor ranged from to Mg C ha-1. The emission rate of soil-organic-carbon-derived CO2 obtained by incubation of intact soil samples correlated closely with the carboxymethylcellulase CMCase activity in the soil. The sum of cool-water soluble polysaccharides hot-water soluble polysaccharides .
