caa a22 4500 463208773 CHVBK 20180405153134.0 cr unu---uuuuu 170326e20070301xx s 000 0 eng 10.1007/s10705-006-9068-0 doi (NATIONALLICENCE)springer-10.1007/s10705-006-9068-0 Fluxes of methane and nitrous oxide in water-saving rice production in north China [Elektronische Daten] [Christine Kreye, Klaus Dittert, Xunhua Zheng, Xu Zhang, Shan Lin, Hongbin Tao, Burkhard Sattelmacher] Lowland rice production is currently facing serious water shortages in numerous Asian countries. In the North China Plain water limitations are severe. Water-saving rice production techniques are therefore increasingly searched for. Here we present the first study of trace gas emissions from a water-saving rice production system where soils are mulched and are kept close to field capacity in order to compare their contribution to global warming with traditional paddy rice. In a two-year field experiment close to Beijing, CH4 and N2O fluxes were monitored in two forms of the Ground Cover Rice Production System (GCRPS) and in traditional paddy fields using closed chambers. With paddy rice the observed CH4 emissions were very low, about 0.3g CH4m−2a−1 in 2001 and about 1g CH4 m−2a−1 in 2002. In GCRPS, the CH4 emissions were negligible. N2O fluxes in GCRPS were similar, 0.5 to 0.6g N2O m−2a−1 in 2001 and 2002, and emission peaks mainly followed fertilizer applications. In paddy rice, N2O fluxes were unexpectedly low throughout the year 2001 (0.03gN2Om−2a−1), and in 2002 larger emissions occurred during the drainage period. So with 0.4g N2O m−2a−1 the cumulative flux was similar to emissions in GCRPS. Total CO2 equivalent fluxes calculated according to IPCC methodology were tenfold higher in GCRPS compared to paddy in 2001. In 2002, fluxes from both systems were similar with 175 and 141g CO2 equivalents m−2a−1 from GCRPS and paddy. Springer Science+Business Media B.V., 2006 CH4 nationallicence Greenhouse gas emissions nationallicence N2O nationallicence Plastic film mulching nationallicence Water-saving rice nationallicence Kreye Christine Institute of Plant Nutrition and Soil Science, Kiel University, Kiel, Germany aut Dittert Klaus Institute of Plant Nutrition and Soil Science, Kiel University, Kiel, Germany aut Zheng Xunhua State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing, China aut Zhang Xu Department of Plant Nutrition, China Agricultural University, Beijing, China aut Lin Shan Department of Plant Nutrition, China Agricultural University, Beijing, China aut Tao Hongbin Institute of Plant Nutrition and Soil Science, Kiel University, Kiel, Germany aut Sattelmacher Burkhard Institute of Plant Nutrition and Soil Science, Kiel University, Kiel, Germany aut Nutrient Cycling in Agroecosystems Kluwer Academic Publishers 77/3(2007-03-01), 293-304 1385-1314 77:3<293 2007 77 10705 https://doi.org/10.1007/s10705-006-9068-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10705-006-9068-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kreye Christine Institute of Plant Nutrition and Soil Science, Kiel University, Kiel, Germany aut NATIONALLICENCE 700 1- Dittert Klaus Institute of Plant Nutrition and Soil Science, Kiel University, Kiel, Germany aut NATIONALLICENCE 700 1- Zheng Xunhua State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing, China aut NATIONALLICENCE 700 1- Zhang Xu Department of Plant Nutrition, China Agricultural University, Beijing, China aut NATIONALLICENCE 700 1- Lin Shan Department of Plant Nutrition, China Agricultural University, Beijing, China aut NATIONALLICENCE 700 1- Tao Hongbin Institute of Plant Nutrition and Soil Science, Kiel University, Kiel, Germany aut NATIONALLICENCE 700 1- Sattelmacher Burkhard Institute of Plant Nutrition and Soil Science, Kiel University, Kiel, Germany aut NATIONALLICENCE 773 0- Nutrient Cycling in Agroecosystems Kluwer Academic Publishers 77/3(2007-03-01), 293-304 1385-1314 77:3<293 2007 77 10705 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer