Emission of Greenhouse Gases From Upland Rice and Soybean
2003
Shin, Y.K. (National Institute of Agriculture Science and Technology, Suwon, Republic of Korea) | Ahn, J.W. (Rural Development Administration, Suwon, Republic of Korea) | Koh, M.H. | Shim, J.C.
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 sprinker irrigation or natural precipitation. Three soybean cultivars Jangyeobkong, Taekwangkong and Hwangkeumkong, were sown with seeding space of 60 ¡¿ 15 cm on June 16, 2001. Gas samlpes 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 3.5 kg CH4ha-1. However, negative emission of methane, -1.7 kg CH2ha-1, was observed in upland rice field of natural precipitation. Total nitrous oxide emission from upland rice fields of sprinkler irrigation and natural precipitation were 15,822 and 2,216 kg CO2ha-1, respectively. Methane emissions from fields of soybean cultivars Jangyeobkong, Taekwangkong and Hwangkeumkong were -14.7, -4.3 and 4.8 kg CH4ha-1, respectively.
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