Chao-Ming Lai1, Guang-Ruei Ke1, Chen-Ching Chao2, Rey-May Liou3, Shu-Ren Wang2, Chin-Wei Lin4, Wen-Hsiung Chen4, Kuei-Long Liu1, Chien-Chih Lee1, Tian-Yih Wu5, Jeng-Hsien Tsai5, Yuong-How Tsai6, Shan-Ney Huang4, and Shang-Shyng Yang7. (1) Department of Agricultural Chemistry, National Taiwan University, Taipei, 10617, Taiwan, (2) Department of Soil and Environmental Science, National Chung Hsing University, Taichung, 40227, Taiwan, (3) Department of Environmental Resources Management, Chia Nan University of Pharmacy and Science, Tainan, 71710, Taiwan, (4) Tainan District Agricultural Research and Extension Station, Council of Agriculture, Tainan, 71246, Taiwan, (5) Miaoli District Agricultural Research and Extension Station, Council of Agriculture, Miaoli, 36347, Taiwan, (6) Kaohsiung District Agricultural Research and Extension Station, Council of Agriculture, Kaohsiung, 90002, Taiwan, (7) Department of Biochemical Science and Technology, National Taiwan University, Taipei, 10617, Taiwan
Effects of current four cropping systems, including paddy-paddy, paddy-upland, upland-paddy, and upland-upland on emissions of greenhouse gases (CO2, CH4, N2O) from agricultural soils in Taiwan were examined by a closed chamber method. The results showed that the total emissions of the three greenhouse gases (expressed as total CO2 equivalent) for the four cropping systems (paddy-paddy, paddy-upland, upland-paddy, upland-upland) were 19,503, 13,892, 14,027, and 10,986 kg C ha-1 y-1, respectively. The mitigation potential of total greenhouse gases emissions could range from 1,087 to 13,308 kg C ha-1 y-1, with a mean value of 5,632 kg C ha-1 y-1. The results of forward stepwise regression analysis were also presented to examine the relationships between the emissions of the greenhouse gases and the environmental factors. |
|