Chinese Journal of Agrometeorology ›› 2011, Vol. 32 ›› Issue (04): 530-537.doi: 10.3969/j.issn.1000-6362.2011.04.009

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Simulation of CO2 Emission from Rice Fields under Different Cropping Systems in Central Sichuan Hilly Area with DCDC Model

SUN Yuan yuan, SUN Yong jian, WANG Rui ting, FENG Jian dong,LI Chun lu, MA Jun, LI Shou cheng   

  1. Institute of Plateau Meteorology, CMA, Chengdu 610072, China;Agro meteorological Center of Sichuan Meteorological Bureau, Chengdu 610072;College of Agronomy, Sichuan Agricultural University,Wenjiang 611130;Sichuan Rural Economic Information Center, Chengdu610072
  • Online:2011-11-20 Published:2011-11-23

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Abstract: CO2 emission from rice fields under different rotation system, including flooded paddy fields to paddy to rice fields (PF), rapeseed to paddy rice fields (RR) and winter wheat to paddy rice fields (RW), was simulated by using DNDC model, based on the high resolution(1m) IKONOS satellite. The experiment was conducted from May 2005 to May 2006 in Jintang county, Sichuan province, a typical hilly area. The results showed that annual total flux CO2 emission from PF, RR and RW was 4102, 7512 and 8111 kg·ha-1, respectively. But the flux of CO2 emission for one cropping among the treatments was not significantly different. The total yield of RW was highest, followed by RR. Both of them was higher significant than PF. The flux of CO2 emission was 25.48 〖JP3〗and 3.36 kg·ha-1·d-1 during rice growing season and non growing season for PF. The flux of CO2 emission was 23.32 and 25.21 kg·ha-1·d-1 during rice growing season for RR and RW, and 19.34 and 20.96 kg·ha-1·d-1 during non growing seasonrespectively. Root respiratory was the main soil respiratory, which contributed to 59.14%-62.96% during the whole growth season for RR, RW, and PF.

Key words: DNDC model, Rotation systems, Rice fields, CO2 emission