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Effects of Exogenous Enzymes on Dietary Nutrient Digestibility for Broiler Chickens and Growing Pigs
Effects of Exogenous Enzymes on Dietary Nutrient Digestibility for Broiler Chickens and Gr...
Effects of Exogenous Enzymes on Dietary Nutrient Digestibility for Broiler Chickens and Growing Pigs

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20250211152050
ISBN  
9798342104401
DDC  
612
저자명  
Wise, Tanner.
서명/저자  
Effects of Exogenous Enzymes on Dietary Nutrient Digestibility for Broiler Chickens and Growing Pigs
발행사항  
[Sl] : Purdue University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
146 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-04, Section: B.
주기사항  
Advisor: Adeola, Olayiwola;Richert, Brian;Karcher, Darrin;Kidd, Michael.
학위논문주기  
Thesis (Ph.D.)--Purdue University, 2024.
초록/해제  
요약The objective of the experiments conducted for this dissertation was to investigate the effects of exogenous enzymes on nutrient digestibility for broiler chickens and growing pigs. These experiments covered the effects of phytase, protease, and carbohydrases on the nutrient availability of various diet types and ingredients, as well as evaluations of regression methods for determining ingredient energy values. One study investigated a factorial of phytase and dietary phytate levels on the ileal digestibility of amino acids (AA) and phosphorus (P) for broilers and pigs. The results of these experiments indicated that phytase improved the ileal digestibility of P (P 0.05) and all AA (P 0.05) for broilers regardless of the dietary phytate level, and the ileal digestibility of P (P 0.05) and many economically important AA (P 0.05) for pigs. This study did not reveal any significant interactions between phytase and dietary phytate, but there were a number of numerical differences in the relative effect of phytase in the two diet types. In a subsequent experiment the effects of a factorial of phytase and protease on ileal P and AA digestibility were evaluated for growing pigs. Similarly to the first study, phytase was shown to improve the ileal digestibility of P (P 0.05) and a majority of AA (P 0.05). There were limited main effects of protease, however, it was found to decrease the digestibility of Lys, Met, and Thr (P 0.05). There were a number of significant quadratic interactions (P 0.05) of protease within phytase level, where the necessary concentration of protease to elicit positive effects was dependent on phytase inclusion. The next study evaluated the effects of two carbohydrase blends on the ileal AA digestibility and energy values of soybean meal. Both enzyme blends elicited modest improvements in the ileal and total tract digestibility of energy, but there were limited effects on the energy values of the test diets. Both enzyme blends improved the apparent metabolizable energy of soybean meal, but the blend with lower activity and no protease inclusion produced the greater results with an improvement of 15.2%. These enzyme blends resulted in the improved ileal digestibility of nearly all AA from soybean meal for broilers. The last study was a validation of the three-point model for the regression method against a four-point model over both the same test ingredient inclusion range or smaller range. This evaluation used both canola meal and wheat as test ingredients to evaluate if changes in dietary energy or protein levels affect the results of this method, which are representative of both cereal grains and protein concentrates, respectively. The results indicated that there was no difference in the three and four-point models for either ingredient as long as the overall range of test ingredient concentration was the same in both models. This proved more important for canola meal, as it was more susceptible to problems with the estimates or variability based on changes in inclusion. Based on the results of these experiments, it is clear that phytase can improve the AA digestibility for both pigs and chickens, but care must be taken when combinations are made with protease. These data indicate that the use of carbohydrase blends can improve the nutrient availability of soybean meal, and this could have significant implications in diet formulation. Lastly, the use of the three-point model for the regression method is appropriate, but is dependent on the inclusion level of the test ingredient test ingredient.
일반주제명  
Physiology
일반주제명  
Phosphorus
일반주제명  
Feeds
일반주제명  
Ingredients
일반주제명  
Amino acids
일반주제명  
Diet
일반주제명  
Hogs
일반주제명  
Canola
일반주제명  
Energy
일반주제명  
Nutrients
일반주제명  
Soybeans
일반주제명  
Poultry
일반주제명  
Small intestine
일반주제명  
Dietary minerals
일반주제명  
Agronomy
일반주제명  
Animal sciences
기타저자  
Purdue University.
기본자료저록  
Dissertations Abstracts International. 86-04B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■1001  ▼aWise,  Tanner.
■24510▼aEffects  of  Exogenous  Enzymes  on  Dietary  Nutrient  Digestibility  for  Broiler  Chickens  and  Growing  Pigs
■260    ▼a[Sl]▼bPurdue  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a146  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-04,  Section:  B.
■500    ▼aAdvisor:  Adeola,  Olayiwola;Richert,  Brian;Karcher,  Darrin;Kidd,  Michael.
■5021  ▼aThesis  (Ph.D.)--Purdue  University,  2024.
■520    ▼aThe  objective  of  the  experiments  conducted  for  this  dissertation  was  to  investigate  the  effects  of  exogenous  enzymes  on  nutrient  digestibility  for  broiler  chickens  and  growing  pigs.  These  experiments  covered  the  effects  of  phytase,  protease,  and  carbohydrases  on  the  nutrient  availability  of  various  diet  types  and  ingredients,  as  well  as  evaluations  of  regression  methods  for  determining  ingredient  energy  values.  One  study  investigated  a  factorial  of  phytase  and  dietary  phytate  levels  on  the  ileal  digestibility  of  amino  acids  (AA)  and  phosphorus  (P)  for  broilers  and  pigs.  The  results  of  these  experiments  indicated  that  phytase  improved  the  ileal  digestibility  of  P  (P    0.05)  and  all  AA  (P    0.05)  for  broilers  regardless  of  the  dietary  phytate  level,  and  the  ileal  digestibility  of  P  (P    0.05)  and  many  economically  important  AA  (P    0.05)  for  pigs.  This  study  did  not  reveal  any  significant  interactions  between  phytase  and  dietary  phytate,  but  there  were  a  number  of  numerical  differences  in  the  relative  effect  of  phytase  in  the  two  diet  types.  In  a  subsequent  experiment  the  effects  of  a  factorial  of  phytase  and  protease  on  ileal  P  and  AA  digestibility  were  evaluated  for  growing  pigs.  Similarly  to  the  first  study,  phytase  was  shown  to  improve  the  ileal  digestibility  of  P  (P    0.05)  and  a  majority  of  AA  (P    0.05).  There  were  limited  main  effects  of  protease,  however,  it  was  found  to  decrease  the  digestibility  of  Lys,  Met,  and  Thr  (P    0.05).  There  were  a  number  of  significant  quadratic  interactions  (P  0.05)  of  protease  within  phytase  level,  where  the  necessary  concentration  of  protease  to  elicit  positive  effects  was  dependent  on  phytase  inclusion.  The  next  study  evaluated  the  effects  of  two  carbohydrase  blends  on  the  ileal  AA  digestibility  and  energy  values  of  soybean  meal.  Both  enzyme  blends  elicited  modest  improvements  in  the  ileal  and  total  tract  digestibility  of  energy,  but  there  were  limited  effects  on  the  energy  values  of  the  test  diets.  Both  enzyme  blends  improved  the  apparent  metabolizable  energy  of  soybean  meal,  but  the  blend  with  lower  activity  and  no  protease  inclusion  produced  the  greater  results  with  an  improvement  of  15.2%.  These  enzyme  blends  resulted  in  the  improved  ileal  digestibility  of  nearly  all  AA  from  soybean  meal  for  broilers.  The  last  study  was  a  validation  of  the  three-point  model  for  the  regression  method  against  a  four-point  model  over  both  the  same  test  ingredient  inclusion  range  or  smaller  range.  This  evaluation  used  both  canola  meal  and  wheat  as  test  ingredients  to  evaluate  if  changes  in  dietary  energy  or  protein  levels  affect  the  results  of  this  method,  which  are  representative  of  both  cereal  grains  and  protein  concentrates,  respectively.  The  results  indicated  that  there  was  no  difference  in  the  three  and  four-point  models  for  either  ingredient  as  long  as  the  overall  range  of  test  ingredient  concentration  was  the  same  in  both  models.  This  proved  more  important  for  canola  meal,  as  it  was  more  susceptible  to  problems  with  the  estimates  or  variability  based  on  changes  in  inclusion.  Based  on  the  results  of  these  experiments,  it  is  clear  that  phytase  can  improve  the  AA  digestibility  for  both  pigs  and  chickens,  but  care  must  be  taken  when  combinations  are  made  with  protease.  These  data  indicate  that  the  use  of  carbohydrase  blends  can  improve  the  nutrient  availability  of  soybean  meal,  and  this  could  have  significant  implications  in  diet  formulation.  Lastly,  the  use  of  the  three-point  model  for  the  regression  method  is  appropriate,  but  is  dependent  on  the  inclusion  level  of  the  test  ingredient  test  ingredient.
■590    ▼aSchool  code:  0183.
■650  4▼aPhysiology
■650  4▼aPhosphorus
■650  4▼aFeeds
■650  4▼aIngredients
■650  4▼aAmino  acids
■650  4▼aDiet
■650  4▼aHogs
■650  4▼aCanola
■650  4▼aEnergy
■650  4▼aNutrients
■650  4▼aSoybeans
■650  4▼aPoultry
■650  4▼aSmall  intestine
■650  4▼aDietary  minerals
■650  4▼aAgronomy
■650  4▼aAnimal  sciences
■690    ▼a0791
■690    ▼a0719
■690    ▼a0285
■690    ▼a0475
■71020▼aPurdue  University.
■7730  ▼tDissertations  Abstracts  International▼g86-04B.
■790    ▼a0183
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162749▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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