Elevated methane emissions from a paddy field in southeast China occur after applying anaerobic digestion slurry

Huang, Hongying; Jin-liu, Cao; Wu, Hong‐sheng; Ye, Xiaomei; Ma, Yan; Yu, Jian-Guang; Shen, Qirong; ZhiZhou, Chang

doi:10.1111/gcbb.12088

Cited by 19 publications

(8 citation statements)

References 29 publications

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“…Other studies have also found no differences in methane emissions when mineral fertilizers are replaced by PS [22] or ADPS [28] at the same N rates. However, opposite results were reported by Huang et al [29] who found significant CH 4 increases when mineral fertilizer was replaced by ADPS and the application was fractioned (40% base, 25% tillering, and 35% heading), but no differences were found when ADPS was applied in a unique application (base fertilization).…”

Section: Methane Fluxes and Cumulative Emissionscontrasting

confidence: 55%

“…Win et al [23] reported that cumulative methane emissions for the growing season were 1.6 times higher for ADPS-fertilized plots than for plots with chemical fertilization, but with no significant differences, while no differences in N 2 O fluxes were found between the two types of fertilizers. Huang et al [29] found significant increases in CH 4 emissions by applying ADPS. Under Mediterranean rice conditions, only Maris et al [22] studied the application of PS to flooded rice, and their results showed no significant differences in GHG emissions and GWP for PS fertilization compared to ammonium fertilization.…”

Section: Introductionmentioning

confidence: 98%

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Greenhouse Gas Emissions as Affected by Fertilization Type (Pig Slurry vs. Mineral) and Soil Management in Mediterranean Rice Systems

2020

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The great increase in livestock production in some European areas makes it necessary to recycle organic slurries and manures and to integrate them in crop production. In Northeast Spain, the application of pig slurry (PS) is being extended to alternative crops such as rice due to the great increase in pig production. However, there is a lack of information of the effect of substitution of synthetic fertilizers with pig slurry on greenhouse gas (GHG) emissions in rice crop, and this information is key for the sustainability of these agricultural systems. The aim of this study was to evaluate the effect of the substitution of mineral fertilizers by PS on GHG emissions in Mediterranean flooded rice cultivation conditions under optimal nitrogen (N) fertilization. Two field experiments were carried out in two different (contrasting) soil types with different land management. Site 1 had been cultivated for rice in the previous three years with no puddling practices. Site 2 had been cultivated for rice for more than 15 years with puddling tillage practices and had higher organic matter content than site 1. The cumulative nitrous oxide emissions during the crop season were negative at both sites, corroborating that under flooded conditions, methane is the main contributor to global warming potential rather than nitrous oxide. The substitution of mineral fertilizer with PS before seeding at the same N rate did not increase emissions in both sites. However, at site 1 (soil with lower organic matter content), the higher PS rate applied before seeding (170 kg N ha−1) increased methane emissions compared to the treatments with lower PS rate and mineral fertilizer before seeding (120 kg N ha−1) and complemented with topdressing mineral N. Thus, a sustainable strategy for inclusion of PS in rice fertilization is the application of moderate PS rates before seeding (≈120 kg N ha−1) complemented with mineral N topdressing.

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Section: Methane Fluxes and Cumulative Emissionscontrasting

confidence: 55%

Section: Introductionmentioning

confidence: 98%

Greenhouse Gas Emissions as Affected by Fertilization Type (Pig Slurry vs. Mineral) and Soil Management in Mediterranean Rice Systems

2020

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“…A small amount of CH 4 emissions were also found by Odlare et al (2012) at 1 and 7 d after biogas slurry application in a laboratory incubation experiment. But other studies show contradicting results; Huang et al (2013) found 3-84% greater CH 4 emissions from pig BS application than from chemical fertilizer in a paddy field in China. Our previous studies found a risk of CH 4 emission from a paddy field fertilized with cow BS (Win et al 2010;Sasada et al 2011) compared with chemical fertilizer.…”

Section: Introductionmentioning

confidence: 89%

“…There are not many studies available about the effect of BS application on CH 4 emission in rice paddy (Debnath et al 1996;Win et al 2010Win et al , 2012Sasada et al 2011;Odlare et al 2012;Huang et al 2013). Debnath et al (1996) found very low and no significant difference in CH 4 emission (2.09 and 2.2 g CH 4 m −2 ) between 120 kg nitrogen (N) urea and urea plus biogas spent slurry (60 kg urea + 60 kg N from BS) in an Indian rice field.…”

Section: Introductionmentioning

confidence: 99%

Effect of two whole-crop rice (Oryza sativaL.) cultivars on methane emission and Cu and Zn uptake in a paddy field fertilized with biogas slurry

Win

Toyota

Ito

et al. 2016

Soil Science and Plant Nutrition

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A field experiment was carried out to evaluate the effect of two whole-crop rice (Oryza sativa L.) cultivars, TULT and Takanari, on methane (CH 4) emission in a paddy field fertilized with biogas slurry (BS) at rates of 0 (NF), 100 (BS100) and 300 (BS300) kg nitrogen (N) ha −1 , in comparison with chemical fertilizer CF100 (100 kg N ha −1). Takanari produced significantly higher biomass (P < 0.001) than TULT and showed significantly (P < 0.01) lower CH 4 emission than TULT. BS applications caused higher CH 4 emission (52 ± 27 and 80 ± 19 g m −2 in BS100 and BS300, respectively) than did CF100 (42 ± 18 g m −2) and NF (28 ± 10 g m −2) in TULT. In contrast, there was no significant difference in CH 4 emission in Takanari among the treatments (26 ± 2, 26 ± 2, 32 ± 4, 29 ± 8 g m −2 in NF, CF100, BS100 and BS300, respectively). Methane oxidizing bacteria (MOB) showed significantly (P < 0.05) higher populations in Takanari than in TULT at harvest, which might be due to the higher root biomass (10.3 ± 2.2 g hill −1) in Takanari than in TULT (8.9 ± 1.8 g hill −1). MOB was significantly correlated with tiller number (R 2 = 0.176*) and plant biomass (R 2 = 0.242*). BS application showed higher copper (Cu) uptake in Takanari while it was not high in TULT. In contrast, it showed no difference in zinc (Zn) uptake in both varieties. Uptake of Cu was not different between the two varieties, while uptake of Zn in the grain was higher in TULT than in Takanari. The present study suggests that CH 4 emission deriving from BS application in paddy field can be mitigated by selecting an appropriate cultivar, like Takanari. However, care should be taken for heavy metal uptake in selecting cultivars.

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“…Anaerobic digestion was considered to be a promising option for the treatment of waste, which could solve the problem of waste contamination and produce energy. With the further development of anaerobic digestion, an increasing output of ADW, which typically contained high concentrations of ammonium, phosphate, and suspended solids, was inevitable and approximately 385 million tons of liquid waste had been generated by over 30 million methane-generating tanks [ 1 ]. ADW also had a high N:P ratio and chemical oxygen demand (COD), so it was difficult to treat ADW by conventional biological processes, such as by waste lagoons [ 2 ], sequencing batch biofilm reactors (SBBRs) and sequencing batch reactors (SBRs) [ 3 ], which was complex, had a higher cost or did not have renewable matter cycles during treatment.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen and phosphorus removal from anaerobically digested wastewater by microalgae cultured in a novel membrane photobioreactor

Chen

et al. 2018

Biotechnol Biofuels

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BackgroundWith the further development of anaerobic digestion, an increasing output of anaerobically digested wastewater (ADW), which typically contained high concentrations of ammonium, phosphate, and suspended solids, was inevitable. Microalgae cultivation offered a potential waste-to-value strategy to reduce the high nutrient content in ADW and obtain high value-added microalgae. However, ADW generally contained a mass of pollutants (suspended solids, competitors, etc.), which could inhibit microalgae growth and even result in microalgae death by limiting light utilization. Thus, it is highly imperative to solve the problem by a novel modified photobioreactor for further practical applications.ResultsFour microalgae species, Scenedesmus dimorphus, Scenedesmus quadricauda, Chlorella sorokiniana, and Chlorella vulgaris ESP-6, were cultivated in the membrane photobioreactor (MPBR) fed with ADW to investigate the efficiency of ammonia and phosphorus removal. The results showed that C. sorokiniana had the best performance for the removal of ammonia and phosphorus from ADW. The highest amount of C. sorokiniana biomass was 1.15 g/L, and the removal efficiency of phosphate (66.2%) peaked at an ammonia concentration of 128.5 mg/L after 9 days’ incubation. Moreover, the MPBR with 0.1 μm membrane pore size had the best ammonia and phosphate removal efficiencies (43.9 and 64.9%) at an ammonia concentration of 128.5 mg/L during 9 days’ incubation. Finally, the continuous multi-batch cultivation of C. sorokiniana was performed for 45 days in MPBR, and higher removal ammonia amount (18.1 mg/day) and proteins content (45.6%) were obtained than those (14.5 mg/day and 37.4%) in an normal photobioreactor.ConclusionIn this study, a novel MPBR not only eliminated the inhibitory effects of suspended solid and microorganisms, but also maintained a high microalgae concentration to obtain a high amount of ammonia and phosphate removal. The research provided a theoretical foundation for the practical application of MPBRs in various wastewater treatment schemes without pretreatment by algae, which could be used as biofuels or protein feed.

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Elevated methane emissions from a paddy field in southeast China occur after applying anaerobic digestion slurry

Cited by 19 publications

References 29 publications

Greenhouse Gas Emissions as Affected by Fertilization Type (Pig Slurry vs. Mineral) and Soil Management in Mediterranean Rice Systems

Greenhouse Gas Emissions as Affected by Fertilization Type (Pig Slurry vs. Mineral) and Soil Management in Mediterranean Rice Systems

Effect of two whole-crop rice (Oryza sativaL.) cultivars on methane emission and Cu and Zn uptake in a paddy field fertilized with biogas slurry

Nitrogen and phosphorus removal from anaerobically digested wastewater by microalgae cultured in a novel membrane photobioreactor

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