Feasibility for use of digested slurry by the pouring method in paddy fields of Southern Vietnam

Oritate, Fumiko; Nakamura, Masato; Nguyen, Dan Phuoc; Dang, Hanh Vu Bich; Nguyen, Khanh; Yuyama, Yoshito; Yamaoka, Masaru; Kitagawa, Iwao; Sakoda, Akiyoshi

doi:10.1007/s10333-015-0512-0

Cited by 11 publications

(9 citation statements)

References 6 publications

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“…Biogas production from livestock waste and the use of biogas effluent as fertilizer for crops will be a promising technology to address these problems by closing the material cycle in crop-livestock systems as proposed by Fujiwara (2012). The biogas produced in anaerobic digesters contains about 60% methane and is used for domestic cooking and heating in developing countries, such as Thailand (Aggarangsi et al 2013) and Vietnam (Oritate et al 2016), providing a clean and cheap fuel. For example, Roubík et al (2017) estimated that the total biogas energy potential from livestock in Vietnam was 120,000 TJ in 2015 and would increase to 127,000 TJ by 2020.…”

Section: Introductionmentioning

confidence: 99%

“…Biogas effluent generally contains sufficient concentrations of nitrogen (N; mainly as ammonium, NH 4 -N), phosphorus (P), and potassium (K), although most P is bound to solids (Nakamura 2007;Endo 2014). Previous field studies demonstrated the suitability of biogas effluent as NPK fertilizer in rice paddies (e.g., Nishikawa et al 2012;Oritate et al 2016), upland fields (e.g., Loria et al 2007;Tokuda et al 2010), and grasslands (e.g., Matsunaka et al 2006;Saigusa et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, the high price of SPAD meters limits their use by income-poor farmers (Yang et al 2003), we therefore used LCC values as an index to determine the timing of biogas effluent application. Based on LCC values, we tested the variable-timing, fixed-rate (volume) application strategy as a first step to optimize the strategy for the application of biogas effluent produced from cattle waste for rice production in Vietnam, where household biogas digesters are widely used in rural areas (Oritate et al 2016). This strategy was expected to avoid the risk of applying too little or too much N from effluent with unknown N concentration.…”

Section: Introductionmentioning

confidence: 99%

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Variable-timing, fixed-rate application of cattle biogas effluent to rice using a leaf color chart: microcosm experiments in Vietnam

Minamikawa

Khánh

Hosen

et al. 2019

Soil Science and Plant Nutrition

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Livestock production plays a leading role in agricultural land-use change. Producing biogas from livestock waste and subsequently using the biogas effluent as fertilizer for crops is a promising option to solve environmental problems resulting from expanding livestock production. However, it is difficult to promptly and accurately measure the nitrogen (N) concentration of effluent for farmers in developing countries, making precise N management difficult. The objectives of the current study were (1) to evaluate the feasibility of variable-timing, fixed-rate application of cattle biogas effluent using a leaf color chart (LCC) for rice (Oryza sativa L.) and (2) to determine the optimum LCC threshold for grain yield. We conducted two microcosm experiments in the Mekong Delta of Vietnam in 2018 using eight treatments of N-fertilizer application. In the Zero treatment, we applied no N. In the Estd treatment, we split-applied N as effluent (E) at fixed rate and timing as the standard method. In E2.75, E3.00, E3.25, E3.50, and E3.75, we applied effluent whenever the LCC value went below 2.75, 3.00, 3.25, 3.50, and 3.75, respectively. In U3.25, we applied N as urea (U) whenever the LCC value fell below 3.25. The total effluent-N application rate ranged from 90 to 210 kg N ha −1 season −1. Rice growth was normal but there was a substantial yield gap between the two microcosm experiments due to the seasonal difference in solar radiation. Rice yield tended to increase with increasing LCC threshold. There was a positive linear relationship between LCC and chlorophyll content (SPAD) values (R 2 = 0.73-0.79). Grain yield was well explained (R 2 = 0.70-0.89) by the seasonal mean LCC or SPAD value. Plant total N uptake increased with increasing LCC threshold, but the three calculated indices of N use efficiency (NUE)apparent N recovery, agronomic NUE, and internal NUEwere not always improved with a higher LCC threshold. Our results showed that the tested variable-timing, fixed-rate strategy for the application of cattle biogas effluent was feasible and the optimum LCC threshold for grain production was 3.75 under the current microcosm conditions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Variable-timing, fixed-rate application of cattle biogas effluent to rice using a leaf color chart: microcosm experiments in Vietnam

Minamikawa

Khánh

Hosen

et al. 2019

Soil Science and Plant Nutrition

View full text Add to dashboard Cite

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“…(5) Other conditions Other necessary data related to vehicles were prepared (Table 2). These were the default values set in the model (Yamaoka et al 2014a(Yamaoka et al , 2016b) as a general case in Japan: obtaining these data was difficult, given the lack of research on slurry transportation and application in Vietnam, with the exception of the authors' previous study (Oritate et al 2016). Results and discussion Table 3 lists the physiochemical properties of the digested slurry.…”

Section: Plan For Transportation Of Digested Slurry and Application Tmentioning

confidence: 99%

“…In Vietnam, methane fermentation has mainly been applied to pig manure (e.g., Huong et al 2014, Izumi et al 2016, Matsubara et al 2014, Thu et al 2012, Vu et al 2007, and a few studies have investigated the utilization of digested slurries of pig manure as fertilizer (Nguyen & Fricke 2015, Oritate et al 2016. However, methane fermentation has rarely been applied to MSW in Vietnam.…”

Section: Introductionmentioning

confidence: 99%

Multiple Evaluations of Use of Digested Slurry from Methane Fermentation of Household Food Waste in Vegetable Growing in Ho Chi Minh City, Vietnam

Oritate

Cuc

Ushida

et al. 2018

JARQ

Self Cite

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With the ultimate aim of constructing a recycling loop in Ho Chi Minh City (HCMC) by introducing the source-segregation of household food waste, applying methane fermentation technology to treat it, using the biogas generated as energy and the resulting digested slurry for agriculture, multiple evaluations were made of the use of digested slurry as follows: 1) a physiochemical analysis of the digested slurry obtained by methane fermentation of household food waste in HCMC; 2) a crop growth experiment using the slurry on green mustard; and 3) a simulation of transporting the digested slurry and applying it in agriculture. The digested slurry had a lower ammonia nitrogen content and a smaller ratio of ammonia to total nitrogen than those in previous studies of digested slurries from food waste in other countries. It also had a low harmful contaminant content. The crop growth experiment using the slurry clarified the positive effects of digested slurry on green mustard: plant yield and height, and the width of the biggest leaf produced per seedling, were significantly greater than when no nitrogen was applied. Yield was highly correlated with the ammonia nitrogen application rate, and almost the same fertilization effects as those with chemical fertilizer are expected to be obtained if fertilization design were based on the ammonia nitrogen levels in the digested slurry. No definitive effects of the digested slurry on soil were found. The simulation revealed that the transport and application of digested slurry in the suburbs of HCMC would likely be more efficient than in Japan due to the longer period for application and smaller required storage capacity of digested slurry throughout the year in a climate warmer than that in Japan.

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Ammonia volatilization from Vietnamese acid sulfate paddy soil following application of digested slurry from biogas digester

Nakamura

Oritate

Yuyama

et al. 2017

Paddy Water Environ

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Feasibility for use of digested slurry by the pouring method in paddy fields of Southern Vietnam

Cited by 11 publications

References 6 publications

Variable-timing, fixed-rate application of cattle biogas effluent to rice using a leaf color chart: microcosm experiments in Vietnam

Variable-timing, fixed-rate application of cattle biogas effluent to rice using a leaf color chart: microcosm experiments in Vietnam

Multiple Evaluations of Use of Digested Slurry from Methane Fermentation of Household Food Waste in Vegetable Growing in Ho Chi Minh City, Vietnam

Ammonia volatilization from Vietnamese acid sulfate paddy soil following application of digested slurry from biogas digester

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