Methane flux from paddy vegetated soil: a comparison between biogas digested liquid and chemical fertilizer

Singla, Ankit; Dubey, Suresh Kumar; Ali, Muhammad Aslam; Inubushi, Kazuyuki

doi:10.1007/s11273-014-9365-3

Cited by 6 publications

(2 citation statements)

References 34 publications

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“…Many studies have indicated that the incorporation of organic material into paddy soils increases methane emissions because of the accumulation of carbon (C), which is a substrate for methanogens (Chen et al 2011;Watanabe et al 1999;Yagi and Minami 1990). Although several studies have indicated that the application of residual slurry might cause a potential risk of methane emissions from paddy fields (Sasada et al 2011;Singla and Inubushi 2014;Win et al 2010;Win et al 2014), a few studies have shown that the application of residual slurry decreased the methane emissions (Singla et al 2015;Singla and Inubushi 2013). Therefore, the results have been contradictory.…”

Section: Introductionmentioning

confidence: 99%

Effect of the long-term application of anaerobically digested residual slurry on methane emissions in a rice paddy field

Tanaka

Nitta

Kido

et al. 2017

Soil Science and Plant Nutrition

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The anaerobic digestion of livestock manure is an environmentally compatible technology used for the production of renewable energy. Anaerobically digested residual slurry has been used worldwide as a liquid fertilizer in both upland and paddy fields. However, a controversial question remains as to whether the application of slurry to rice paddy fields increases methane emissions; although methane is one of the most prevalent greenhouse gases, little is known about the effects of the long-term application of residual slurry on methane emission. In this study, we repeatedly applied slurry to a paddy field for six years at different application rates (10, 15, and 20 g N m −2 based on ammoniumnitrogen content). At the fifth and sixth years of application, we evaluated the effect in terms of methane flux and soil total carbon content. The effect of the long-term application of the slurry (10 g N m −2 ) on grain yield was equivalent to that of chemical fertilizer (10 g N m −2 ). The application of the residual slurry was likely to increase the cumulative methane emissions during rice growing season in both 2006 and 2007. On the other hand, we observed that soil total carbon did not accumulate significantly in the soil. Thus, we cannot rule out the potential risk of additional methane emissions caused by the application of the residuary slurry to paddy fields.

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Section: Introductionmentioning

confidence: 99%

Effect of the long-term application of anaerobically digested residual slurry on methane emissions in a rice paddy field

Tanaka

Nitta

Kido

et al. 2017

Soil Science and Plant Nutrition

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“…Various methods have been used to explore phenotypic and genotypic diversity among rhizobial population, but more attention has been given to molecular techniques as these are very rapid and accurate (Muyzer, 1999;Singla et al, 2014Singla et al, , 2015.…”

Section: Introductionmentioning

confidence: 99%

Molecular diversity of berseem (<italic>Trifolium alexandrinum</italic> L.) rhizobia isolated from Haryana soil

Garg

Kukreja

Gera

2015

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Total of forty rhizobia were isolated from nodule samples of berseem crop from farmers' fields representing 17 villages of Haryana state, India. All the isolates were Gram-negative small rods and authenticated as rhizobia by plant infectivity test. Twenty nine rhizobial isolates on the basis of good nodulation characteristics were further selected for molecular diversity study. The amplified PCR product of genomic DNA of all the 29 rhizobia was digested with HaeIII restriction enzyme which resulted in polymorphic bands. Dendrogram based on RFLP of 16S rDNA profiles showed that all the 29 isolates were distributed in two major groups with different subgroups. A total of 7 biotypes were formed at 80% level of similarity by considering each cluster as rhizobial biotype, and out of these, two biotypes (1 st and 5 th ) were found to be most prevalent in all the three districts studied. So, the rhizobia belonging to these two biotypes may be used as biofertilizer in these three districts. Moreover, isolates from same nodule were not 100% similar. It indicated that considerable diversity was present among berseem rhizobial isolates.

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Effects of steel slag and biochar amendments on CO2, CH4, and N2O flux, and rice productivity in a subtropical Chinese paddy field

Chün

Wang

Sardans

et al. 2018

Environ Geochem Health

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Steel slag, a by-product of the steel industry, contains high amounts of active iron oxide and silica which can act as an oxidizing agent in agricultural soils.Biochar is a rich source of carbon, and the combined application of biochar and steel slag is assumed to have positive impacts on soil properties as well as plant growth, which are yet to be validated scientifically. We conducted a field experiment for two rice paddies (early and late paddy) to determine the individual and combined effects of steel slag and biochar amendments on CO2, CH4, and N2O emission, and rice productivity in a subtropical paddy field of China. The amendments did not significantly affect rice yield. The seasonal CO2 flux in each treatment was correlated positively with soil temperature, and negatively with the water content, salinity, and soil pH during most of the study period. The seasonal CH4 flux was positively correlated with the soil salinity and water content in all treatments except the biochar treatment in the early-paddy, and also with the soil temperature during most of the study period. It was observed that CO2 was the main greenhouse gas emitted from all treatments of both paddies. Steel slag decreased the cumulative CO2 flux in the late paddy. Biochar as well as steel slag+biochar treatment decreased the cumulative CO2 flux in the late paddy and complete year (early and late paddy); while, steel slag+biochar treatment also decreased the cumulative CH4 flux in the early paddy. The biochar, and steel slag+biochar amendments decreased the global-warming potential (GWP). Interestingly, the cumulative annual GWP was lower for the biochar (55, , 422 kg CO2-eq ha -1 ), and steel slag+biochar (53, 965 kg CO2-eq ha -1 ) treatments than the control (68, , 962 kg CO2-eq ha -1 ). Total GWP per unit yield was lower for the combined application of steel slag+biochar (8951 kg CO2-eq Mg -1 yield) compared to the control (12, , 805 kg CO2-eq Mg -1 yield). This study suggested that the combined application of steel slag and biochar could be an effective long-term strategy to reduce greenhouse gases emission from paddies without any detrimental effect on the yield.

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Methane flux from paddy vegetated soil: a comparison between biogas digested liquid and chemical fertilizer

Cited by 6 publications

References 34 publications

Effect of the long-term application of anaerobically digested residual slurry on methane emissions in a rice paddy field

Effect of the long-term application of anaerobically digested residual slurry on methane emissions in a rice paddy field

Molecular diversity of berseem (<italic>Trifolium alexandrinum</italic> L.) rhizobia isolated from Haryana soil

Effects of steel slag and biochar amendments on CO2, CH4, and N2O flux, and rice productivity in a subtropical Chinese paddy field

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