Emission of Greenhouse Gases from Upland Rice and Soybean

밭벼와 콩 재배지의 온실가스 배출

  • Shin, Yong-Kwang (National Institute of Agricultural Science and Technology) ;
  • Ahn, Jong-Woong (Research Management Bureau, Rural Development Administration) ;
  • Koh, Mun-Hwan (National Institute of Agricultural Science and Technology) ;
  • Shim, Jae-Chun (National Institute of Agricultural Science and Technology)
  • Received : 2003.02.12
  • Accepted : 2003.02.26
  • Published : 2003.08.30

Abstract

The emission of methane and nitrous oxide was measured from fields of upland rice and soybean. Rice cultivar, Daejinbyeo, was seeded in a row of 30 cm space in upland soil on April 28, 2001. The fields were irrigated with sprinkler irrigation or natural precipitation. Three soybean cultivars Jangyeobkong, Taekwangkong and Hwangkeumkong, were sown with seeding space of $60{\times}15cm$ on June 16, 2001. Gas samples were collected twice a week during the growth period, and methane and nitrous oxide were analyzed. Methane emission from upland rice field of sprinkler irrigation was $3.5kg\;CH_4\;ha^{-1}$. However, negative emission of methane, $-1.7kg\;CH_4\;ha^{-1}$, was observed in upland rice field of natural precipitation. Total nitrous oxide emission from upland rice field of sprinkler irrigation was $50.8kg\;N_2O\;ha^{-1}$, while the emission in the field of natural precipitation was $8.3kg\;N_2O\;ha^{-1}$. Global warming potentials (GWP) in the upland rice fields of sprinkler irrigation and natural precipitation were 15,822 and $2,216kg\;CO_2\;ha^{-1}$, respectively. Methane emissions from fields of soybean cultivars Jangyeobkong, Taekwangkong and Hwangkeumkong were -14.7, -4.3 and $4.8kg\;CH_4\;ha^{-1}$, respectively. Total nitrous oxide emissions from fields of soybean cultivars Jangyeobkong, Taekwangkong and Hwangkeumkong were 4.7, 4.6 and $3.0kg\;N_2O\;ha^{-1}$, respectively. Total GWPs for soybean cultivars Jangyeobkong, Taekwangkong and Hwangkeumkong were 1152, 1323 and $1027kg\;CO_2\;ha^{-1}$, respectively.

밭벼와 콩 재배지에서 메탄과 아산화질소 배출을 측정하였다. 2001년 4월 28일 폭 30 cm 간격으로 대진벼를 파종하였다. 포장의 물관리는 스프링클러 관개와 천연강우 관개로 하였다. 콩 품종 장엽콩, 태광콩, 황금콩을 2001년 6월 16일에 $60{\times}15cm$ 간격으로 한 구멍에 2알씩 파종하였다. 기체시료는 주 2회씩 채취하여 메탄과 아산화질소를 분석하였다. 밭벼 작기중 메탄 배출은 스프링클러 관개구에서 $3.5kg\;CH_4\;ha^{-1}$ 였었고 천연관개구에서 $-1.7kg\;CH_4\;ha^{-1}$ 였었다. 밭벼 작기중 아산화질소 배출은 스프링클러 관개구에서 $50.8kg\;N_2O\;ha^{-1}$ 였었고 천연관개구에서 $8.3kg\;N_2O\;ha^{-1}$ 였었다. 밭벼 재배지에서 배출하는 온실가스 GWP는 스프링클러 관개구와 천연관개구에서 각각 15,822 및 $2,216kg\;CO_2\;ha^{-1}$ 였었다. 콩 작기중 메탄 배출은 장엽콩 재배구에서 $-14.7kg\;CH_4\;ha^{-1}$ 였었고 태광콩 재배구에서 $-4.3kg\;CH_4\;ha^{-1}$, 황금콩 재배구에서 $4.8kg\;CH_4\;ha^{-1}$ 였었다. 콩 작기중 아산화질소 배출은 장엽콩 재배구에서 $4.7kg\;N_2O\;ha^{-1}$, 태광콩 재배구에서 $4.6kg\;N_2O\;ha^{-1}$, 그리고 황금콩 재배구에서 $3.0kg\;N_2O\;ha^{-1}$ 였었다. 콩 작기중 배출하는 온실가스 GWP는 장엽콩, 태광콩, 황금콩 재배구에서 각각 1,152, 1,323 및 $1,027kg\;CO_2\;ha^{-1}$ 였었다.

Keywords

References

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