Ammonia emission from excreta of growing-finishing pigs as affected by dietary composition

T.T. Canh

Research output: Thesisinternal PhD, WUAcademic

Abstract

<p>Ammonia, volatilised from pig slurry decreases manure's fertiliser value. Furthermore, the deposition of ammonia emitted into the atmosphere may cause undesirable changes in aquatic and terrestrial ecosystems. At present, there is increasing interest in nutritional means to reduce ammonia emission.</p><p>In pigs, nitrogen excreted via faeces is predominantly incorporated in bacterial protein, which is less susceptible to rapid decomposition. Nitrogen excreted via urine is mainly in the form of urea, which is easily converted into ammonia and carbon dioxide by the enzyme urease present in faeces.</p><p>In different experiments the effect of dietary factors on nitrogen excretion of pigs and on pH as well as ammonia emission from slurry were investigated. Increasing the level of non-starch polysaccharides (NSP) in the diet shifted nitrogen excretion from urine to faeces and reduced slurry pH. The latter was caused by an increase of volatile fatty acid formation in faeces and slurry during storage. Lowering dietary electrolyte balance (dEB; Na + K - Cl) and adding acidifying Ca-salts: CaSO <sub>4</sub> , CaCl <sub>2</sub> or Ca-benzoate instead of CaCO <sub>3</sub> , a common added salt in commercial pig feed, reduced the pH of urine and slurry. Reducing dietary crude protein (CP) and supplementing essential amino acids decreased the total and urinary nitrogen excretion.</p><p>These changes in dietary compositions, causing a lower urinary nitrogen excretion and pH of slurry, resulted in a strong reduction of ammonia emission from slurry. Changing dietary composition to reduce ammonia emission did not influence animal performance.</p><p>It is concluded that manipulating the dietary factors such as NSP, dEB, Ca-salts, and CP, influences ammonia emission from slurry, while maintaining a normal pig performance. Such this approach might be an economic way to reduce the environmental impact of pig farming.</p>
LanguageEnglish
QualificationDoctor of Philosophy
Awarding Institution
Supervisors/Advisors
  • Verstegen, Martin, Promotor
  • Aarnink, A.J.A., Promotor, External person
  • Schrama, Johan, Promotor
Award date24 Jun 1998
Place of PublicationS.l.
Publisher
Print ISBNs9789054858768
Publication statusPublished - 1998

Fingerprint

excreta
finishing
ammonia
swine
nitrogen
excretion
feces
urine
salts
polysaccharides
crude protein
diet
bacterial proteins
benzoates
pig manure
animal performance
urease
volatile fatty acids
essential amino acids
animal manures

Keywords

  • air pollution
  • ammonia
  • emission
  • volatilization
  • feeds
  • composition
  • pigs
  • animal manures
  • slurries

Cite this

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title = "Ammonia emission from excreta of growing-finishing pigs as affected by dietary composition",
abstract = "Ammonia, volatilised from pig slurry decreases manure's fertiliser value. Furthermore, the deposition of ammonia emitted into the atmosphere may cause undesirable changes in aquatic and terrestrial ecosystems. At present, there is increasing interest in nutritional means to reduce ammonia emission.In pigs, nitrogen excreted via faeces is predominantly incorporated in bacterial protein, which is less susceptible to rapid decomposition. Nitrogen excreted via urine is mainly in the form of urea, which is easily converted into ammonia and carbon dioxide by the enzyme urease present in faeces.In different experiments the effect of dietary factors on nitrogen excretion of pigs and on pH as well as ammonia emission from slurry were investigated. Increasing the level of non-starch polysaccharides (NSP) in the diet shifted nitrogen excretion from urine to faeces and reduced slurry pH. The latter was caused by an increase of volatile fatty acid formation in faeces and slurry during storage. Lowering dietary electrolyte balance (dEB; Na + K - Cl) and adding acidifying Ca-salts: CaSO 4 , CaCl 2 or Ca-benzoate instead of CaCO 3 , a common added salt in commercial pig feed, reduced the pH of urine and slurry. Reducing dietary crude protein (CP) and supplementing essential amino acids decreased the total and urinary nitrogen excretion.These changes in dietary compositions, causing a lower urinary nitrogen excretion and pH of slurry, resulted in a strong reduction of ammonia emission from slurry. Changing dietary composition to reduce ammonia emission did not influence animal performance.It is concluded that manipulating the dietary factors such as NSP, dEB, Ca-salts, and CP, influences ammonia emission from slurry, while maintaining a normal pig performance. Such this approach might be an economic way to reduce the environmental impact of pig farming.",
keywords = "luchtverontreiniging, ammoniak, emissie, vervluchtiging, voer, samenstelling, varkens, dierlijke meststoffen, drijfmest, air pollution, ammonia, emission, volatilization, feeds, composition, pigs, animal manures, slurries",
author = "T.T. Canh",
note = "WU thesis 2465 Proefschrift Wageningen",
year = "1998",
language = "English",
isbn = "9789054858768",
publisher = "Canh",

}

Ammonia emission from excreta of growing-finishing pigs as affected by dietary composition. / Canh, T.T.

S.l. : Canh, 1998. 163 p.

Research output: Thesisinternal PhD, WUAcademic

TY - THES

T1 - Ammonia emission from excreta of growing-finishing pigs as affected by dietary composition

AU - Canh, T.T.

N1 - WU thesis 2465 Proefschrift Wageningen

PY - 1998

Y1 - 1998

N2 - Ammonia, volatilised from pig slurry decreases manure's fertiliser value. Furthermore, the deposition of ammonia emitted into the atmosphere may cause undesirable changes in aquatic and terrestrial ecosystems. At present, there is increasing interest in nutritional means to reduce ammonia emission.In pigs, nitrogen excreted via faeces is predominantly incorporated in bacterial protein, which is less susceptible to rapid decomposition. Nitrogen excreted via urine is mainly in the form of urea, which is easily converted into ammonia and carbon dioxide by the enzyme urease present in faeces.In different experiments the effect of dietary factors on nitrogen excretion of pigs and on pH as well as ammonia emission from slurry were investigated. Increasing the level of non-starch polysaccharides (NSP) in the diet shifted nitrogen excretion from urine to faeces and reduced slurry pH. The latter was caused by an increase of volatile fatty acid formation in faeces and slurry during storage. Lowering dietary electrolyte balance (dEB; Na + K - Cl) and adding acidifying Ca-salts: CaSO 4 , CaCl 2 or Ca-benzoate instead of CaCO 3 , a common added salt in commercial pig feed, reduced the pH of urine and slurry. Reducing dietary crude protein (CP) and supplementing essential amino acids decreased the total and urinary nitrogen excretion.These changes in dietary compositions, causing a lower urinary nitrogen excretion and pH of slurry, resulted in a strong reduction of ammonia emission from slurry. Changing dietary composition to reduce ammonia emission did not influence animal performance.It is concluded that manipulating the dietary factors such as NSP, dEB, Ca-salts, and CP, influences ammonia emission from slurry, while maintaining a normal pig performance. Such this approach might be an economic way to reduce the environmental impact of pig farming.

AB - Ammonia, volatilised from pig slurry decreases manure's fertiliser value. Furthermore, the deposition of ammonia emitted into the atmosphere may cause undesirable changes in aquatic and terrestrial ecosystems. At present, there is increasing interest in nutritional means to reduce ammonia emission.In pigs, nitrogen excreted via faeces is predominantly incorporated in bacterial protein, which is less susceptible to rapid decomposition. Nitrogen excreted via urine is mainly in the form of urea, which is easily converted into ammonia and carbon dioxide by the enzyme urease present in faeces.In different experiments the effect of dietary factors on nitrogen excretion of pigs and on pH as well as ammonia emission from slurry were investigated. Increasing the level of non-starch polysaccharides (NSP) in the diet shifted nitrogen excretion from urine to faeces and reduced slurry pH. The latter was caused by an increase of volatile fatty acid formation in faeces and slurry during storage. Lowering dietary electrolyte balance (dEB; Na + K - Cl) and adding acidifying Ca-salts: CaSO 4 , CaCl 2 or Ca-benzoate instead of CaCO 3 , a common added salt in commercial pig feed, reduced the pH of urine and slurry. Reducing dietary crude protein (CP) and supplementing essential amino acids decreased the total and urinary nitrogen excretion.These changes in dietary compositions, causing a lower urinary nitrogen excretion and pH of slurry, resulted in a strong reduction of ammonia emission from slurry. Changing dietary composition to reduce ammonia emission did not influence animal performance.It is concluded that manipulating the dietary factors such as NSP, dEB, Ca-salts, and CP, influences ammonia emission from slurry, while maintaining a normal pig performance. Such this approach might be an economic way to reduce the environmental impact of pig farming.

KW - luchtverontreiniging

KW - ammoniak

KW - emissie

KW - vervluchtiging

KW - voer

KW - samenstelling

KW - varkens

KW - dierlijke meststoffen

KW - drijfmest

KW - air pollution

KW - ammonia

KW - emission

KW - volatilization

KW - feeds

KW - composition

KW - pigs

KW - animal manures

KW - slurries

M3 - internal PhD, WU

SN - 9789054858768

PB - Canh

CY - S.l.

ER -