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Diel Change of Methane Emission through Rice Plant under Different Water Management and Organic Amendment  

Shin, Yong-Kwang (Division of Agricultural Environment, National Institute of Agricultural Science and Technology)
Lee, Yang-Soo (Division of Agricultural Environment, National Institute of Agricultural Science and Technology)
Koh, Mun-Hwan (Division of Agricultural Environment, National Institute of Agricultural Science and Technology)
Eom, Ki-Cheol (Division of Agricultural Environment, National Institute of Agricultural Science and Technology)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.36, no.1, 2003 , pp. 32-40 More about this Journal
Abstract
To characterize diel pattern of methane transport via rice plant, methane emission was measured on specific days in rice growing stages; tillering, meiotic, heading and harvest stages, from a paddy under different water management and organic amendments. Methane emission was monitored every two hours a day from chambers with and without rice plants. Proportion of the rice plant-mediated methane emission at different stage increased till the maximum growth of LAI and dry weight, and decreased thereafter. The proportion of methane emission through rice plants on June 18-19 at tillering stage was 38.4, 36.5 and 64.3 percent for NPK, Rice straw compost, RSC, and rice straw on February, RS2, respectively. The proportion on July 30-31 at meiotic stage was 70.4, 74.3 and 74.4 percent for NPK, RSC and RS2, respectively. The proportion on August 20-21 at heading stage was 80.1, 84.5 and 74.8 percent for NPK, RSC and RS2, respectively. The proportion on September 28-29 at harvest stage was 69.9, 65.9 and 64.4 percent for NPK, RSC and RS2, respectively.
Keywords
Diel change; Methane; Water management; Organic amendment;
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