Potential to mitigate ammonia emission from slurry by increasing dietary fermentable fiber through inclusion of tropical byproducts in practical diets for growing pigs

Nguyen, Quan Hai; Le, P.D.; Chim, Channy; Le, Ngoan D.; Fievez, Veerle

doi:10.5713/ajas.18.0481

Cited by 7 publications

(3 citation statements)

References 28 publications

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“…Previous studies have explored the increased VFA content in pig slurry resulting from fibrous feedstuffs [47,48]. However, even though the peat moss used in our study had a high fiber content, a 3% inclusion of peat moss had a limited impact on enhancing VFA levels in the pig slurry.…”

Section: Concentration Of Volatile Fatty Acid (Vfa) In Pig Slurrymentioning

confidence: 79%

Mitigating Carbon Emissions: The Impact of Peat Moss Feeding on CH4 and CO2 Emissions during Pig Slurry Storage

Lee,

Ahn

2023

Applied Sciences

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The present study investigated the impact of peat moss as a feed additive on the emission of methane (CH4) and carbon dioxide (CO2) from piggery slurry stored in slurry pits. There is no well-known study on the relationship between pig manure generated after feeding peat moss as a feed additive and CH4 and CO2 released during the storage period. A lab-scale experiment was conducted for two months using a slurry pit simulator composed of six vessels—three for pig slurry collected after feeding 3.0% peat moss as a feed additive (PFS) and three for pig slurry without feeding peat moss (CTL). PFS reduced CO2 and CH4 emissions (p < 0.05) from stored pig slurry by approximately 23% and 44%, respectively. PFS exhibits substantially elevated concentrations of humic substance (HS) such as humic acid, fulvic acid, and humin compared with CTL, with fold differences of 2.3, 1.8, and 1.1, respectively. Elevated HS levels in the PFS seemed to limit hydrolysis, resulting in lower total volatile fatty acid concentrations compared with CTL. A dominance of CH4 in total carbon emissions was observed (p < 0.05), with CH4 accounting for approximately 93% and 95% of total carbon emissions in PFS and CTL, respectively. PFS had a roughly 43% lower impact on cumulative carbon emissions than CTL, primarily due to decreased CH4 emissions. These findings suggest that PFS may be a promising approach for mitigating carbon emissions and potentially impacting environmental sustainability and climate change mitigation efforts.

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Section: Concentration Of Volatile Fatty Acid (Vfa) In Pig Slurrymentioning

confidence: 79%

Mitigating Carbon Emissions: The Impact of Peat Moss Feeding on CH4 and CO2 Emissions during Pig Slurry Storage

Lee,

Ahn

2023

Applied Sciences

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“…The correlation analysis results in this study showed that both NH 3 and H 2 S were positively correlated with total VFAs (r = 0.771, p < 0.1). Undigested protein fermentation in the caecum is a major source of odours, and the fermentation of these kinds of protein may produce potentially odorous end products, including indoles, NH 3 , H 2 S and branched-chain fatty acids [ 41 ]. Additionally, protein fermentation is often reported to be accompanied by carbohydrate fermentation.…”

Section: Discussionmentioning

confidence: 99%

Effects of Different Laying Hen Species on Odour Emissions

et al. 2020

Animals

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Odour is one of the main environmental concerns in the laying hen industry and may also influence animal health and production performance. Previous studies showed that odours from the laying hen body are primarily produced from the microbial fermentation (breakdown) of organic materials in the caecum, and different laying hen species may have different odour production potentials. This study was conducted to evaluate the emissions of two primary odorous gases, ammonia (NH3) and hydrogen sulphide (H2S), from six different laying hen species (Hyline, Lohmann, Nongda, Jingfen, Xinghua and Zhusi). An in vitro fermentation technique was adopted in this study, which has been reported to be an appropriate method for simulating gas production from the microbial fermentation of organic materials in the caecum. The results of this study show that Jingfen produced the greatest volume of gas after 12 h of fermentation (p < 0.05). Hyline had the highest, while Lohmann had the lowest, total NH3 emissions (p < 0.05). The total H2S emissions of Zhusi and Hyline were higher than those of Lohmann, Jingfen and Xinghua (p < 0.05), while Xinghua exhibited the lowest total H2S emissions (p < 0.05). Of the six laying hen species, Xinghua was identified as the best species because it produced the lowest total amount of NH3 + H2S (39.94 µg). The results for the biochemical indicators showed that the concentration of volatile fatty acids (VFAs) from Zhusi was higher than that for the other five species, while the pH in Zhusi was lower (p < 0.01), and the concentrations of ammonium nitrogen (NH4+), uric acid and urea in Xinghua were lower than those in the other species (p < 0.01). Hyline had the highest change in SO42− concentration during the fermentation processes (p < 0.05). In addition, the results of the correlation analysis suggested that NH3 emission is positively related to urease activities but is not significantly related to the ureC gene number. Furthermore, H2S emission was observed to be significantly related to the reduction of SO42− but showed no connection with the aprA gene number. Overall, our findings provide a reference for future feeding programmes attempting to reduce odour pollution in the laying hen industry.

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“…The fibre components of NDF, ADF and Lignin were analysed on the Ankom system (A200). Ammonia in silage was analyzed using the technique described by Chaney and Marbach (1962) and a detailed processing was described by Nguyen et al (2019).…”

Section: Chemical Analysismentioning

confidence: 99%

Ensiling Techniques for Whole-Plant Sunflowers (Helianthus annuus) and their Nutritive Values for Ruminants in Vietnam

Quan¹,

Van²,

Thuy³

et al. 2021

AAVS

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The study aimed to evaluate the biomass yield, chemical composition and ensiling techniques of wholeplant sunflower Aguara 6. In Exp. 1, whole sunflower plant was harvested at the seeding period (SP) to measure biomass yield, chemical composition and energy values. Results showed that, fresh biomass yield was 62 tonnes/ha, in which, heads consisting of 46.8% with the highest, leave accounting for 35.5% and stems consisting of 17.7% as fresh matter with the lowest proportion. The dry matter (DM) content of the whole plant was 17.5% DM, in which 13.5% CP, 45.8% NDF, 44% ADF and 20.7% Lignin; and DE and ME values for ruminants were 3,436 and 2,818 kcal/kg DM, respectively. In Exp. 2, eight treatments included: Control (CTL) -without any additives; Salt 0.5% added to CTL (SCTL); Cassava byproduct added to CTL at 5, 10 and 15% (CB5, CB10 and CB15, respectively); Molasses added to CTL at 2.5, 5.0 and 7.5% (M2.5, M5.0 and M7.5, respectively). Samples were collected at day 0, 7, 14 and 21 for pH and ammonia, and day 0 and 21 for chemical analysis. Results indicated that after 21 days of ensiling, the pH value of silage in 8 treatments were lower than 4.5. There was no effect of additives and their level inclusions on ensiled sunflowers nutritive values. Change in organic matter was found with 0.7-2.3% unit in all treatments. In general, whole Aguara 6 sunflower can be ensiled and has a potential for ruminants.

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Potential to mitigate ammonia emission from slurry by increasing dietary fermentable fiber through inclusion of tropical byproducts in practical diets for growing pigs

Cited by 7 publications

References 28 publications

Mitigating Carbon Emissions: The Impact of Peat Moss Feeding on CH4 and CO2 Emissions during Pig Slurry Storage

Mitigating Carbon Emissions: The Impact of Peat Moss Feeding on CH4 and CO2 Emissions during Pig Slurry Storage

Effects of Different Laying Hen Species on Odour Emissions

Ensiling Techniques for Whole-Plant Sunflowers (Helianthus annuus) and their Nutritive Values for Ruminants in Vietnam

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