Methanogenic Characteristics of Flooded Rice Soils in Response to Glucose Amendment
1996; Taylor & Francis; Volume: 42; Issue: 3 Linguagem: Inglês
10.1080/00380768.1996.10416333
ISSN1747-0765
AutoresAmnat Chidthaisong, Kazuyuki Inubushi, Iwao Watanabe,
Tópico(s)Plant nutrient uptake and metabolism
ResumoAbstract Extract It was reported that flooded rice soil was an important source of atmospheric CH4 (Cicerone and Shetter 1981; Sciler et al. 1984). In flooded rice soils, CH4 is produced under strict anaerobic conditions by methanogenic bacteria (Jones et al. 1987; Jones 1991). Rice plants carry the produced CH4 from anoxic sediment and release it to the atmosphere (Cicerone and Shetter 1981; Nouchi et al. 1990). More than 90% of emitted CH4 is released through rice plants and the emission pattern usually shows large seasonal variations (Cicerone et al. 1983; Sciler et al. 1984; Inubushi et al. 1989). Since the number of methanogens did not change throughout the rice growth season (Schutz et al. 1989; Mayer and Conrad 1990), seasonal variations of CH4 emission could be ascribed to the activities of methanogens and the amount of available substrates. However, the changes in the methanogenic activities in response to available substrates especially in relation to the growth period of rice plants are poorly documented.
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