Analysis Of Factors Affecting Ammonia And Methane Emissions From Pig Slurries: Slurry Composition And Dietary Factors
Reducing crude protein is a recommended technique to reduce nitrogen excretion and ammonia emissions. Greenhouse gas emissions from slurry are also affected by nutrient composition. However, there are interactions among nutrients in feeds still not clarified. The objective of this study was to evalu...
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| Formato: | conferenceObject |
| Lenguaje: | Inglés |
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Wageningen University & Research
2021
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| Acceso en línea: | http://hdl.handle.net/20.500.11939/7572 https://edepot.wur.nl/471679#page=817 |
| _version_ | 1855032630985097216 |
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| author | Antezana, Walter Cerisuelo, Alba Estellés, Fernando Calvet, Salvador |
| author2 | Groot Koerkamp, Peter |
| author_browse | Antezana, Walter Calvet, Salvador Cerisuelo, Alba Estellés, Fernando Groot Koerkamp, Peter |
| author_facet | Groot Koerkamp, Peter Antezana, Walter Cerisuelo, Alba Estellés, Fernando Calvet, Salvador |
| author_sort | Antezana, Walter |
| collection | ReDivia |
| description | Reducing crude protein is a recommended technique to reduce nitrogen excretion and ammonia emissions. Greenhouse gas emissions from slurry are also affected by nutrient composition. However, there are interactions among nutrients in feeds still not clarified. The objective of this study was to evaluate the impacts of different diets on nitrogen (N) and energy balances. A total of 13 diets were evaluated in digestibility trials using 78 animals.
Diets were formulated to fulfil commercial standards, although differing in ingredient composition. Nutrient
intake, excretion and potential NH3 and CH4 (Biochemical methane potential) emissions from slurry were
measured. Animal weight was also monitored. Correlations between emissions and nutrient balance components were done. An analysis of variance was conducted to assess differences in nutrient balance of low, medium and high emitting animals, expressing animals per kg of live weight increased. For the N balance, a two-fold range in faeces to urine N excretion ratio was found throughout the experiments, even considering the low crude protein variations (from 15 to 16%). This was related to the ammonia emissions from slurry (r = -0.60, p<0.001). In fact, the amount of crude protein ingested to increase 1 kg of metabolic weight was positively correlated with the associated emissions (r=0.58, p<0.001). However, this was more related to the consumption by the animal than to the crude protein, which was relatively stable among diets. The difference between animals associated with high or low NH3 emissions per weight gain was therefore related to urine losses due to excess N intake. The energy balance shows that methane potential from slurry was mainly related to the excretion of indigested feed components, mainly the fibrous fraction (particularly the soluble fibre). It was clear that animals emitting high amounts of methane were those with higher dry matter and energy ingestion. The results of this study demonstrate relevant effects on N and energy balances at diets formulated according to commercial standards. |
| format | conferenceObject |
| id | ReDivia7572 |
| institution | Instituto Valenciano de Investigaciones Agrarias (IVIA) |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | Wageningen University & Research |
| publisherStr | Wageningen University & Research |
| record_format | dspace |
| spelling | ReDivia75722025-04-25T14:52:10Z Analysis Of Factors Affecting Ammonia And Methane Emissions From Pig Slurries: Slurry Composition And Dietary Factors Antezana, Walter Cerisuelo, Alba Estellés, Fernando Calvet, Salvador Groot Koerkamp, Peter Feeding strategies NH3 CH4 Nutrition balance L01 Animal husbandry L50 Animal physiology and biochemistry L02 Animal feeding T01 Pollution Ammonia Methane Slurry Reducing crude protein is a recommended technique to reduce nitrogen excretion and ammonia emissions. Greenhouse gas emissions from slurry are also affected by nutrient composition. However, there are interactions among nutrients in feeds still not clarified. The objective of this study was to evaluate the impacts of different diets on nitrogen (N) and energy balances. A total of 13 diets were evaluated in digestibility trials using 78 animals. Diets were formulated to fulfil commercial standards, although differing in ingredient composition. Nutrient intake, excretion and potential NH3 and CH4 (Biochemical methane potential) emissions from slurry were measured. Animal weight was also monitored. Correlations between emissions and nutrient balance components were done. An analysis of variance was conducted to assess differences in nutrient balance of low, medium and high emitting animals, expressing animals per kg of live weight increased. For the N balance, a two-fold range in faeces to urine N excretion ratio was found throughout the experiments, even considering the low crude protein variations (from 15 to 16%). This was related to the ammonia emissions from slurry (r = -0.60, p<0.001). In fact, the amount of crude protein ingested to increase 1 kg of metabolic weight was positively correlated with the associated emissions (r=0.58, p<0.001). However, this was more related to the consumption by the animal than to the crude protein, which was relatively stable among diets. The difference between animals associated with high or low NH3 emissions per weight gain was therefore related to urine losses due to excess N intake. The energy balance shows that methane potential from slurry was mainly related to the excretion of indigested feed components, mainly the fibrous fraction (particularly the soluble fibre). It was clear that animals emitting high amounts of methane were those with higher dry matter and energy ingestion. The results of this study demonstrate relevant effects on N and energy balances at diets formulated according to commercial standards. 2021-08-25T15:47:39Z 2021-08-25T15:47:39Z 2018 conferenceObject Antezana, W., Cerisuelo, A., Estellés, F. & Calvet, S. (2018). Analysis Of Factors Affecting Ammonia And Methane Emissions From Pig Slurries: Slurry Composition And Dietary Factors. Proceedings of the European Conference on Agricultural Engineering (AgEng2018), 817-823. http://hdl.handle.net/20.500.11939/7572 10.18174/471679 https://edepot.wur.nl/471679#page=817 en 2018-07 European Conference on Agricultural Engineering (AgEng2018) Wageningen, the Netherlands This project was funded by the Spanish Ministry of Science and Innovation (AGL2014-56653). Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ openAccess Wageningen University & Research electronico |
| spellingShingle | Feeding strategies NH3 CH4 Nutrition balance L01 Animal husbandry L50 Animal physiology and biochemistry L02 Animal feeding T01 Pollution Ammonia Methane Slurry Antezana, Walter Cerisuelo, Alba Estellés, Fernando Calvet, Salvador Analysis Of Factors Affecting Ammonia And Methane Emissions From Pig Slurries: Slurry Composition And Dietary Factors |
| title | Analysis Of Factors Affecting Ammonia And Methane Emissions From Pig Slurries: Slurry Composition And Dietary Factors |
| title_full | Analysis Of Factors Affecting Ammonia And Methane Emissions From Pig Slurries: Slurry Composition And Dietary Factors |
| title_fullStr | Analysis Of Factors Affecting Ammonia And Methane Emissions From Pig Slurries: Slurry Composition And Dietary Factors |
| title_full_unstemmed | Analysis Of Factors Affecting Ammonia And Methane Emissions From Pig Slurries: Slurry Composition And Dietary Factors |
| title_short | Analysis Of Factors Affecting Ammonia And Methane Emissions From Pig Slurries: Slurry Composition And Dietary Factors |
| title_sort | analysis of factors affecting ammonia and methane emissions from pig slurries slurry composition and dietary factors |
| topic | Feeding strategies NH3 CH4 Nutrition balance L01 Animal husbandry L50 Animal physiology and biochemistry L02 Animal feeding T01 Pollution Ammonia Methane Slurry |
| url | http://hdl.handle.net/20.500.11939/7572 https://edepot.wur.nl/471679#page=817 |
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