Effect of rice cultivar on CH_4 production potential of rice soil and CH_4 emission in a pot experiment(Soil Chemistry and Mineralogy)

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概要

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• Methane production potential (MPP) of rice soil, defined here as the mean value of methane production rate (MP-R) of rice soil over a given period in which the substrate for methanogenesis is presumably depleted, significantly affects CH_4 emission to the atmosphere. To expand our understanding of how MPP was affected in soils grown with different rice cultivars (Yanxuan, 72031 and 9516) and its consequence on CH_4 emission, the changing pattern of MP-R was elucidated in the present study. On an entire rice growing scale, the MPP of planted soil was significantly higher than that of unplanted soil, and the MPP of 72031 rice soil was 9.42 μg CH_4 kg_<(d.w.s)>^<-1>h^<-1>, significantly lower than Yanxuan (18.2 μg CH_4 kg_<(d.w.s)>^<-1>h^<-1>) and 9516 rice soils (17.7 μg CH_4 kg_<(d.w.s)>^<-1>h^<-1>). Yanxuan and 9516 soils had a similar MP-R changing pattern, which was distinct from 72031 soil. On a temporal scale of the representative rice growing stages (i.e. early tillering, late tillering, panicle initiation, ripening and harvesting stages), the MPP of rice soils varied widely among rice cultivars, and MPP coincided well with CH_4 emission regardless of rice cultivars. No clear pattern was observed in soil redox potential (soil E_h), or in above-ground biomass of rice cultivars to MPP and CH_4 emission.

• 社団法人日本土壌肥料学会の論文

著者

• Jia Zhongjun

  Institute Of Soil Science Chinese Academy Of Sciences

• Tsuruta Haruo

  Center For Climate System Research The University Of Tokyo

• CAI Zucong

  Institute of Soil Science, Chinese Academy o f Sciences

• Cai Zucong

  Inst. Of Soil Sci. Chinese Acad. Of Sci. Nanjing Chn

• Cai Zucong

  Institute Of Soil Science Chinese Academy O F Sciences

• Cai Zucong

  Institute Of Soil Science Chinese Academy Of Sciences

関連論文

• Life cycle inventory-based analysis of greenhouse gas emissions from arable land farming systems in Hokkaido, northern Japan(Environment)
• Effects of nitrogen fertilization on CH_4 emissions from rice fields(Greenhouse Gas Emissions from Agroecosystems in Monsoon Asia)
• Organic acid accumulation under flooded soil conditions in relation to the incorporation of wheat and rice straws with different C:N ratios(Soil Chemistry and Soil Mineralogy)
• Effect of rice cultivar on CH_4 production potential of rice soil and CH_4 emission in a pot experiment(Soil Chemistry and Mineralogy)

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