Methane emissions and related physicochemical soil and water parameters in rice–fish systems in Bangladesh

Frei, Michael; Razzak, Muhammad Abdur; Hossain, Mahabub; Oehme, Maike; Dewan, S.; Becker, Klaus

doi:10.1016/j.agee.2006.10.013

Cited by 54 publications

(32 citation statements)

References 35 publications

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“…Lightfoot et al (1992) proposed a further mechanism leading to improved N efficiency in the presence of fish, namely reduction of losses through NH 3 volatilization. Fish were repeatedly shown to reduce floodwater pH in rice fields (Rothius et al 1999;Vromant et al 2001;Frei and Becker 2005b;Frei et al 2007b). At lower pH the proportion of ionized ammonium, which is not susceptible to volatilization, is higher (Choudhury and Kennedy 2005) and thus volatilization is reduced.…”

Section: Discussionmentioning

confidence: 96%

Studies on nitrogen cycling under different nitrogen inputs in integrated rice-fish culture in Bangladesh

Oehme

Frei

Razzak

et al. 2007

Nutr Cycl Agroecosyst

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Management of nitrogen (N) in rice-fish culture is of great significance in order to exploit synergies between rice and fish. However, detailed and systematic studies on N cycling in rice-fish systems are rare. An experiment was carried out at the Bangladesh Agricultural University using the fish species common carp, Cyprinus carpio L., and Nile tilapia, Oreochromis niloticus (L.). Efficiencies of fertilizer and feed as N inputs were evaluated by establishing an apparent N balance. The different N input strategies for rice-fish (RF) treatments were:(1) with fish, with urea (101 kg N ha À1 , RF Urea), (2) with fish, with feed (22.6 kg N ha À1 , RF Feed I), and (3) with fish, with feed (41.5 kg N ha À1 , RF Feed I I ) . R i c e o n l y ( v a r . B R 2 8 ) w i t h u r e a (101.2 kg N ha À1 ) was added as the control (Rice only). Urea as N input (Rice only, RF Urea) resulted in negative apparent N balances (N output-N input), whereas N input in the form of feed (RF Feed I, RF Feed II) led to positive apparent N balances due to the lower N input. The presence of fish increased the grain and straw N output in RF Urea compared to Rice only, the effect being significant for straw (P < 0.05). Moreover, a significant difference in nitrogen uptake by rice was seen between the two feeding levels. The higher feeding rate in the RF Feed II treatment led to higher N outputs of grain, straw and fish compared to the RF Feed I treatment, a significant difference occurring for straw (P < 0.05). An apparent recovery efficiency of 48.7% was determined for the additional N input in RF Feed II compared to the RF Feed I teatment. An economic analysis revealed that the RF Urea treatment was the most profitable, as reflected by the highest gross margin. In conclusion, the results indicate that fish can improve nitrogen uptake by rice plants. Moreover, the supply of supplementary feed has a fertilizing effect on the rice due to the utilization of excreted feed nutrients by rice plants.

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Section: Discussionmentioning

confidence: 96%

Studies on nitrogen cycling under different nitrogen inputs in integrated rice-fish culture in Bangladesh

Oehme

Frei

Razzak

et al. 2007

Nutr Cycl Agroecosyst

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show abstract

“…Stadmark and Leonardson 2005;Frei et al 2006;Hendriks et al 2007;Repo et al 2007;Schrier-Uijl et al 2009a, b;Kroon et al, in press). However, a large part of the variability of fluxes cannot be explained by temperature or wind velocity only.…”

Section: Discussionmentioning

confidence: 99%

“…The underlying microbial processes affecting CO 2 and CH 4 production and emission are regulated by variables such as sediment and water temperature, oxygen availability, organic matter availability and composition, sediment and water chemistry, the presence of electron acceptors (redox conditions), pH, electrical conductivity (EC) and factors such as water depth and lake size (e.g. Stadmark and Leonardson 2005;Juutinen et al 2009;Repo et al 2007;Frei et al 2006;Loeb et al 2007;Casper et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Release of CO2 and CH4 from lakes and drainage ditches in temperate wetlands

et al. 2010

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Shallow fresh water bodies in peat areas are important contributors to greenhouse gas fluxes to the atmosphere. In this study we determined the magnitude of CH 4 and CO 2 fluxes from 12 water bodies in Dutch wetlands during the summer season and studied the factors that might regulate emissions of CH 4 and CO 2 from these lakes and ditches. The lakes and ditches acted as CO 2 and CH 4 sources of emissions to the atmosphere; the fluxes from the ditches were significantly larger than the fluxes from the lakes. The mean greenhouse gas flux from ditches and lakes amounted to 129.1 ± 8.2 (mean ± SE) and 61.5 ± 7.1 mg m -2 h -1 for CO 2 and 33.7 ± 9.3 and 3.9 ± 1.6 mg m -2 h -1 for CH 4 , respectively. In most water bodies CH 4 was the dominant greenhouse gas in terms of warming potential. Trophic status of the water and the sediment was an important factor regulating emissions. By using multiple linear regression 87% of the variation in CH 4 could be explained by PO 4 3-concentration in the sediment and Fe 2?concentration in the water, and 89% of the CO 2 flux could be explained by depth, EC and pH of the water. Decreasing the nutrient loads and input of organic substrates to ditches and lakes by for example reducing application of fertilizers and manure within the catchments and decreasing upward seepage of nutrient rich water from the surrounding area will likely reduce summer emissions of CO 2 and CH 4 from these water bodies.

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“…The higher water turbidity due to sediment disturbance might have reduced phytoplankton photosynthesis, leading to the low DO concentrations, pH, and Eh observed in GSBP and GSBC systems (Fig. 2b,c,g) (Frei et al 2007). The contents of OM and TC in the sediment (Fig.…”

Section: Differences Among the 3 Polyculture Systemsmentioning

confidence: 99%

Carbon dioxide and methane fluxes across the sediment-water interface in different grass carp Ctenopharyngodon idella polyculture models

Xiong¹,

Wang²,

Guo³

et al. 2017

Aquacult. Environ. Interact.

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Benthic fluxes of carbon dioxide (CO 2 ) and methane (CH 4 ) were evaluated in grass carp Ctenopharyngodon idella (G), silver carp Hypophthalmichthys molitrix (S), and bighead carp Aristichthys nobilis (B) polyculture systems, to which topmouth culter Erythroculter ilishaeformis (T), Pacific white shrimp Litopenaeus vannamei (P), or common carp Cyprinus carpio (C) were added. These systems, GSBT, GSBP, and GSBC, respectively, were monitored over 5 mo (May to September 2014). The presence of L. vannamei and C. carpio increased CO 2 and CH 4 emissions in GSBP and GSBC, respectively. From June to August, CO 2 and CH 4 fluxes increased in the 3 systems, and in July and August these fluxes were significantly higher in GSBC than in GSBP and GSBT, and significantly higher in GSBP than in GSBT. The metabolisms of L. vannamei and C. carpio contributed to decrease dissolved oxygen, pH, and oxidation−reduction levels, and the bioturbation of the upper sediment layers caused by these species increased organic matter degradation rate, resulting in a significant increase in particulate and dissolved organic carbon in the overlying water. Our results indicate that improving feeding efficiency and reducing organic carbon accumulation on the bottom of aquaculture ponds, as well as increasing dissolved oxygen and decreasing bioturbation across the sediment−water interface during farming seasons, is likely to reduce CO 2 and CH 4 release from aquaculture pond sediment, especially in July and August.

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Methane emissions and related physicochemical soil and water parameters in rice–fish systems in Bangladesh

Cited by 54 publications

References 35 publications

Studies on nitrogen cycling under different nitrogen inputs in integrated rice-fish culture in Bangladesh

Studies on nitrogen cycling under different nitrogen inputs in integrated rice-fish culture in Bangladesh

Release of CO2 and CH4 from lakes and drainage ditches in temperate wetlands

Carbon dioxide and methane fluxes across the sediment-water interface in different grass carp Ctenopharyngodon idella polyculture models

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