Incorporation of rice straw mitigates CH<sub>4</sub>and N<sub>2</sub>O emissions in water saving paddy fields of Central Vietnam

Hoang, Thi Thai Hoa; Thuc, Dinh; Tran, Thi Thu Giang; Ho, Tan Duc; Rehman, Hafeez ur

doi:10.1080/03650340.2018.1487553

Cited by 29 publications

(11 citation statements)

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“…N loss from paddy enhanced by nitrification and denitrification under AWD, reported by Dong et al [5] and Pandey et al [51], results in low N uptake by the plant. AWD causes increased production of N 2 O from paddy soil, and it must be reduced because it's a greenhouse gas and accounts for the detrimental effects on global warming [52].…”

Section: Effect Of Awd On Organic Carbon and Nitrogen Depletionmentioning

confidence: 99%

Biochar with Alternate Wetting and Drying Irrigation: A Potential Technique for Paddy Soil Management

et al. 2021

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Over half of the world’s population depends on rice for its calorie supply, although it consumes the highest amount of water compared to other major crops. To minimize this excess water usage, alternate wetting and drying (AWD) irrigation practice is considered as an efficient technique in which soil intermittently dried during the growing period of rice by maintaining yield compared to a flooded system. Continuous AWD may result in poor soil health caused by carbon loss, nutrient depletion, cracking, and affecting soil physical properties. Due to being a potential organic amendment, biochar has a great scope to overcome these problems by improving soil’s physicochemical properties. Biochar is a carbon enriched highly porous material and characterized by several functional groups on its large surface area and full of nutrients. However, biochar’s implication for sustaining soil physicochemical and water retention properties in the AWD irrigation systems has not been widely discussed. This paper reviews the adverse impacts of AWD irrigation on soil structure and C, N depletion; the potential of biochar to mitigate this problem and recovering soil productivity; its influence on improving soil physical properties and moisture retention; and the scope of future study. This review opined that biochar efficiently retains nutrients and supplies as a slow-release fertilizer, which may restrict preferential nutrient loss through soil cracks under AWD. It also improves soil’s physical properties, slows cracking during drying cycles, and enhances water retention by storing moisture within its internal pores. However, long-term field studies are scarce; additionally, economic evaluation is required to confirm the extent of biochar impact.

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Section: Effect Of Awd On Organic Carbon and Nitrogen Depletionmentioning

confidence: 99%

Biochar with Alternate Wetting and Drying Irrigation: A Potential Technique for Paddy Soil Management

et al. 2021

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“…The addition of straw and green manure can improve soil methane production potentials and the abundances of methanogens (Zhou et al, 2020). However, Hoang et al (2019) found that returning burned straw to the field could reduce seasonal cumulative CH 4 emission. Therefore, the results of fertilization types on soil GHG emissions are still controversial, especially the impact of fertilization on CH 4 fluxes.…”

Section: Introductionmentioning

confidence: 98%

Effects of inorganic and organic fertilizers on CO2 and CH4 fluxes from tea plantation soil

Lin

Zhang

Shen

et al. 2021

Elementa: Science of the Anthropocene

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Agricultural practices such as fertilization considerably influence soil greenhouse gas fluxes. However, the effects of fertilization on greenhouse gases fluxes remain unclear in tea soil when soil nitrogen is low. In the present study, soil CO2 and CH4 fluxes under various fertilization treatments in tea soil were investigated during a 50-day period. The experiment consisted of five treatments: no fertilizer (CK), single nitrogen (urea, N), single oilseed rape cake fertilizer (R), nitrogen + cake fertilizer (2:1, NR1), and nitrogen + cake fertilizer (1:2, NR2). The fertilization proportion of NR1 and NR2 was determined by the nitrogen content of nitrogen fertilizer and cake fertilizer. The results revealed that the single application of nitrogen had no significant effect on soil CO2 flux. However, the addition of cake fertilizer significantly increased CO2 emissions through enhanced soil microbial biomass carbon (MBC). Additionally, CO2 emissions were directly proportional to the amount of carbon (C) in the fertilizer. All treatments were minor sinks for CH4 except for the treatment NR1. Specifically, the cumulative CH4 fluxes of NR1 and NR2 were significantly higher than rest of the three treatments, which implies that application of urea and oilseed rape cake reduced the capability of CH4 oxidation in tea soil. Structural equation models indicated that soil CO2 flux is significantly and positively correlated with soil dissolved organic carbon, MBC and soil pH, while mineral nitrogen content was the main factor affecting CH4 flux. Overall, the application of oilseed rape cake increased the oxidation of CH4 and promoted soil C sequestration but inevitably increased the soil CO2 emissions.

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“…The postharvest field management, associated with edaphic characteristics such as soil temperature and humidity (Nakajima et al 2016), interferes directly with the decomposition of rice straw, and the increase of residue in contact with the soil favors the release of labile C and N (Hoang et al 2019), facilitating the decomposition by the microbial population. Botta et al (2015) observed that the use of a knife-roller reduced the remaining straw by 54.5% during a period of 210 days in relation to the area without interventions.…”

Section: Resultsmentioning

confidence: 99%

Greenhouse gas emission, water quality and straw decomposition as a function of rice postharvest field management

et al. 2020

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The objective of this paper was to evaluate the quality of water drained after the use of the knife-roller (an implement used to incorporate rice residues after harvest), the partial global warming potential (pGWP) and straw decomposition as a result of postharvest field management of irrigated rice. The experiments were conducted during the 2018 and 2019 offseason and the treatments consisted of several water drainage periods (0, 3, 6, 9 and 12 days) after a field pass with a knife-roller. In addition, a nonflooded harvest treatment without straw management was included. Analysis of drainage water three days after a pass with the kniferoller showed a reduction in total soluble solids by 94% compared to zero days. Nitrogen and soluble phosphorus were not influenced by the treatments. However, potassium levels increased as the drainage period increased, which is related to the period between harvest and drainage. As the electrical conductivity is influenced by the concentration of ions, it showed the same response curve as the potassium levels and, for pH, there were small oscillations influenced by the temperature. The total CH 4 emission and the pGWP were higher when the water depth remained for a longer period. However, the N 2 O emissions were higher in the absence of soil submersion. Water should be drained three days after a pass with the knife-roller in order to reduce potassium loss and suspended solids as well as pGWP. The use of the knife-roller accelerated the process of straw decomposition in relation to the unmanaged straw treatment.

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Incorporation of rice straw mitigates CH₄and N₂O emissions in water saving paddy fields of Central Vietnam

Cited by 29 publications

References 50 publications

Biochar with Alternate Wetting and Drying Irrigation: A Potential Technique for Paddy Soil Management

Biochar with Alternate Wetting and Drying Irrigation: A Potential Technique for Paddy Soil Management

Effects of inorganic and organic fertilizers on CO2 and CH4 fluxes from tea plantation soil

Greenhouse gas emission, water quality and straw decomposition as a function of rice postharvest field management

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Incorporation of rice straw mitigates CH4and N2O emissions in water saving paddy fields of Central Vietnam

Cited by 29 publications

References 50 publications

Biochar with Alternate Wetting and Drying Irrigation: A Potential Technique for Paddy Soil Management

Biochar with Alternate Wetting and Drying Irrigation: A Potential Technique for Paddy Soil Management

Effects of inorganic and organic fertilizers on CO2 and CH4 fluxes from tea plantation soil

Greenhouse gas emission, water quality and straw decomposition as a function of rice postharvest field management

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Incorporation of rice straw mitigates CH₄and N₂O emissions in water saving paddy fields of Central Vietnam