Further understanding CH4 emissions from a flooded rice field exposed to experimental warming with elevated [CO2]

Yun, Seok-In; Kang, Beom-Soo; Lim, Sang-Sun; Choi, Woo‐Jung; Ko, Jonghan; Yoon, Sanghoo; Ro, Hee‐Myong; Kim, Han-Yong

doi:10.1016/j.agrformet.2011.10.011

Cited by 34 publications

(16 citation statements)

References 20 publications

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“…Field data of paddy rice to monitor canopy growth conditions were collected from the experimental fields Yun et al, 2011). Crops were sampled on Day Of Year (DOY) 188, 201, 215, 229, 243, and 257 in 2011;DOY 173, 201, 226, 237, and 262 in 2012;DOY 172, 190, 206, and 220 in 2013. Four plants in 2011, twenty-four plants in 2012, forty plants in 2013 were randomly selected, cut, and transported to a laboratory where several plant growth parameters were measured.…”

Section: ) Paddy Rice Datamentioning

confidence: 99%

Determining Canopy Growth Conditions of Paddy Rice via Ground-based Remote Sensing

Jo¹,

Yeom²,

2015

Korean Journal of Remote Sensing

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Section: ) Paddy Rice Datamentioning

confidence: 99%

Determining Canopy Growth Conditions of Paddy Rice via Ground-based Remote Sensing

Jo¹,

Yeom²,

2015

Korean Journal of Remote Sensing

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“…항온배양 실험기간 동안 전체 처리구의 CH4 플럭스는 0 ∼13.8 mg CH4/m/ day의 범위였는데, 이는 본 연구에서 사용한 토양을 채취한 논 포장에서 측정되 CH4 플럭스 (10 ∼300 mg CH4/m/day) 보다 낮은 수준이다 (Yun et al, 2012). 담수 논 조건에서 대부분의 CH4은 벼의 통기조직을 통해 기공으로 배출되기 때문에 벼가 없는 실내 항온 배양실 험 조건에서 CH4 플럭스는 포장 조건에 비해 낮다 (Yun et al, 2012).…”

Section: Ch4 플럭스unclassified

“…담수 논 조건에서 대부분의 CH4은 벼의 통기조직을 통해 기공으로 배출되기 때문에 벼가 없는 실내 항온 배양실 험 조건에서 CH4 플럭스는 포장 조건에 비해 낮다 (Yun et al, 2012). 시기적으로 습윤기간 초기, 전이기간과 건조기간 경계 시점에서 상대적으로 플럭스가 높았는데 (Fig.…”

Section: Ch4 플럭스unclassified

Fertilizer and Organic Inputs Effects on CO₂and CH₄Emission from a Soil under Changing Water Regimes

Lim¹,

Choi

Kim³

2012

Korean Journal of Environmental Agriculture

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BACKGROUND: Agricultural inputs (fertilizer and organic inputs) and water conditions can influence CH 4 and CO 2 emission from agricultural soils. This study was conducted to investigate the effects of agricultural inputs (fertilizer and organic inputs) under changing water regime on CH 4 and CO 2 emission from a soil in a laboratory incubation experiment. METHODS AND RESULTS: Four treatments were laid out: control without input and three type of agricultural inputs ((NH 4 ) 2 SO 4 , AS; pig manure compost, PMC; hairy vetch, HV). Fertilizer and organic inputs were mixed with 25 g of soil at 2.75 mg N/25 g soil (equivalent to 110 kg N/ha) in a bottle with septum, and incubated for 60 days. During the first 30-days incubation, the soil was waterlogged (1 cm of water depth) by adding distilled water weekly, and on 30 days of incubation, excess water was discarded then incubated up to 60 days without addition of water. Based on the redox potential, water regime could be classified into wetting (1 to 30 days), transition (31 to 40 days), and drying periods (41 to 60 days). Across the entire period, CH 4 and CO 2 flux ranged from 0 to 13.8 mg CH 4 /m/day and from 0.4∼1.9 g CO 2 /m/day, and both were relatively higher in the early wetting period and the

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“…Most studies with increased temperatures in the laboratory (incubation studies) (Devevre & Horwath, ; Fey & Conrad, ), in greenhouses and open‐top chambers (Ziska et al ., ; Allen et al ., ), in temperature‐controlled growth chambers (Gaihre et al ., ) and in fields (Tokida et al ., ) have shown increased CH 4 emissions with increased temperatures up to 34–37°C. On the other hand, some studies have reported a small (Yun et al ., ; Pereira et al ., ) to no effect (Gaihre et al ., ) on emissions. Decreased emissions with increasing temperature have also been reported, particularly above 37°C in a laboratory incubation experiment (Yang & Chang, ), at 4°C above ambient temperature in a greenhouse and in an open‐top chamber (Ziska et al ., ; Schrope et al ., ), and at a soil temperature above 34.5°C in the field (Parashar et al ., ).…”

Section: Introductionmentioning

confidence: 98%

Effects of increased temperatures and rice straw incorporation on methane and nitrous oxide emissions in a greenhouse experiment with rice

Gaihre

Waßmann

Villegas-Pangga

et al. 2016

European J Soil Science

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We investigated the effect of increased temperatures of water and soil, together with the incorporation of rice straw, on emissions of methane (CH4) and nitrous oxide (N2O), and the daily variation in CH4 emissions. Three temperature treatments (floodwater temperature), ambient, ambient +2°C and ambient +4°C, and two amounts of rice straw (0 and 6 t ha−1) were arranged in a randomized complete block design with four replications. The emissions of CH4 and N2O and the soil's redox potential (Eh) were measured weekly for two crop cycles. Daily variation in CH4 emission rates was measured with and without rice straw incorporation in planted and unplanted soil (with no warming treatments) during four growth stages of the crop. Methane emissions increased by as much as 91% with increasing amounts of water and soil temperature (+2 and +4°C), up to 34–35°C. Increases in temperature (+2 and +4°C above ambient) above 34–35°C decreased emissions by 30–36%. A decrease in soil Eh to < −100 mV and in CH4 emissions was observed earlier in the pots containing rice straw than in those without straw. Methane emissions varied daily; they were larger from 11:00 to 14:00 hours, particularly in unplanted soil. They showed positive correlations with the temperatures of both soil and air. In contrast, N2O emissions were negligible throughout the growing season. The emissions of CH4 evidently depend on the background temperature range; in our experiment, CH4 emissions increased up to 34°C and then they decreased above that. Highlights: GHG emissions were measured from flooded rice soil under elevated temperatures. Temperature, straw incorporation and rice plants affected daily variation in methane emissions. An increase in temperature increased methane emission by up to 91%. Increased temperature decreased methane emissions when background temperature was above 34–35°C.

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Further understanding CH4 emissions from a flooded rice field exposed to experimental warming with elevated [CO2]

Cited by 34 publications

References 20 publications

Determining Canopy Growth Conditions of Paddy Rice via Ground-based Remote Sensing

Determining Canopy Growth Conditions of Paddy Rice via Ground-based Remote Sensing

Fertilizer and Organic Inputs Effects on CO₂and CH₄Emission from a Soil under Changing Water Regimes

Effects of increased temperatures and rice straw incorporation on methane and nitrous oxide emissions in a greenhouse experiment with rice

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Further understanding CH4 emissions from a flooded rice field exposed to experimental warming with elevated [CO2]

Cited by 34 publications

References 20 publications

Determining Canopy Growth Conditions of Paddy Rice via Ground-based Remote Sensing

Determining Canopy Growth Conditions of Paddy Rice via Ground-based Remote Sensing

Fertilizer and Organic Inputs Effects on CO2and CH4Emission from a Soil under Changing Water Regimes

Effects of increased temperatures and rice straw incorporation on methane and nitrous oxide emissions in a greenhouse experiment with rice

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Fertilizer and Organic Inputs Effects on CO₂and CH₄Emission from a Soil under Changing Water Regimes