Methodological considerations for the determination of standardised ileal amino acid digestibilities in piglets:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Aachen
Shaker
2007
|
| Schriftenreihe: | Berichte aus der Agrarwissenschaft
|
| Schlagworte: | |
| Online-Zugang: | lizenzfrei Inhaltsverzeichnis |
| Beschreibung: | VI, 125 S. graph. Darst. |
| ISBN: | 9783832265106 3832265104 |
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| 245 | 1 | 0 | |a Methodological considerations for the determination of standardised ileal amino acid digestibilities in piglets |c Meike Eklund |
| 264 | 1 | |a Aachen |b Shaker |c 2007 | |
| 300 | |a VI, 125 S. |b graph. Darst. | ||
| 336 | |b txt |2 rdacontent | ||
| 337 | |b n |2 rdamedia | ||
| 338 | |b nc |2 rdacarrier | ||
| 490 | 0 | |a Berichte aus der Agrarwissenschaft | |
| 502 | |a Zugl.: Hohenheim, Univ., Diss., 2007 | ||
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Datensatz im Suchindex
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| adam_text | Table of Contents
1 General Introduction.................................................................................................................................3
1.1 Introduction.......................................................................................................................................3
1.2 Heal Endogenous Crude Protein and Amino Acid Losses...............................................................4
1.2.1 Determination of Total Heal Endogenous Crude Protein and Amino Acid Losses........................5
1.2.2 Determination of Basal Meal Endogenous Crude Protein and Amino Acid Losses.......................6
1.3 Expression of Crude Protein and Amino Acid Digestibilities..........................................................10
1.3.1 Apparent Heal Digestibilities of Crude Protein and Amino Acids................................................10
1.3.2 True Heal Digestibilities of Crude Protein and Amino Acids........................................................11
1.3.3 Standardised Heal Digestibilities of Crude Protein and Amino Acids..........................................12
1.4 Factors Affecting Basal lteal Endogenous Crude Protein and Amino Acid Losses and Heal
Crude Protein and Amino Acid Digestibilities................................................................................13
1.4.1 Animal.........................................................................................................................................13
1.4.2 Age or Body Weight....................................................................................................................14
1.4.3 Dietary Crude Protein Level........................................................................................................18
1.4.4 Feed Intake.................................................................................................................................22
1.5 Scope and Objective of the Thesis................................................................................................24
1.6 References.....................................................................................................................................25
2 Effect of the Dietary Crude Protein and Amino Acid Level on Apparent Heal Digestibilities of Crude
Protein and Amino Acids in Newly Weaned Pigs....................................................................................35
2.1 Summary........................................................................................................................................35
2.2 Introduction.....................................................................................................................................36
2.3 Materials and Methods...................................................................................................................37
2.3.1 Animals and Housing..................................................................................................................37
2.3.2 Surgical Procedure......................................................................................................................37
2.3.3 Experimental Design and Dietary Treatments............................................................................37
2.3.4 Experimental Procedure..............................................................................................................39
2.3.5 Analytical Procedures.................................................................................................................39
2.3.6 Statistical Analyses.....................................................................................................................40
2.4 Results and Discussion..................................................................................................................41
2.4.1 General Observations.................................................................................................................41
2.4.2 Effect of Dietary Crude Protein and Amino Acid Level on Heal Dry Matter Digestibility and
Apparent Heal Digestibilities of Crude Protein and Amino Acids................................................42
2.4.3 Effect of Period on Heal Dry Matter Digestibility and Apparent Heal Digestibilities of Crude
Protein and Amino Acids.............................................................................................................44
2.4.4 The Segmented Quadratic with Plateau Relationships between Apparent Heal Digestibilities
of Crude Protein and Amino Acids and their Dietary Contents...................................................45
2.5 Implications....................................................................................................................................50
2.6 Acknowledgements........................................................................................................................51
2.7 References.....................................................................................................................................52
3 Estimates of Basal Deal Endogenous Losses of Amino Acids by Regression Analysis and
Determination of Standardised Meal Amino Acid Digestibilities from Casein in Newly Weaned Pigs.....57
3.1 Summary........................................................................................................................................57
3.2 Introduction.....................................................................................................................................57
3.3 Materials and Methods...................................................................................................................59
3.3.1 Animals, Diets and Chemical Analyses......................................................................................59
3.3.2 Calculations.................................................................................................................................60
3.3.3 Principles of Extrapolation...........................................................................................................61
3.3.4 Statistical Analyses.....................................................................................................................62
3.4 Results and Discussion..................................................................................................................62
3.4.1 General Observations.................................................................................................................62
3.4.2 Estimates of Standardised Heal Digestibility of Crude Protein and Amino Acids and Basal
Heal Endogenous Crude Protein and Amino Acid Losses by Regression Analysis....................63
3.4.3 The Effects of Different Ranges of Graded Dietary Crude Protein Levels on Estimates of
Standardised Heal Digestibility of Crude Protein and Amino Acids and Basal Meal
Endogenous Crude Protein and Amino Acid Losses by Regression Analysis...........................66
3.4.4 Effect of Dietary Crude Protein Level on the Calculation of Standardised Heal Digestibilities
in Newly Weaned Pigs................................................................................................................70
3.4.5 Effect of Period on Standardised Heal Digestibilities of Crude Protein and Amino Acids in
Newly Weaned Pigs....................................................................................................................71
3.5 Acknowledgements........................................................................................................................73
3.6 References.....................................................................................................................................74
4 Effect of Dietary Crude Protein Level on Basal Heal Endogenous Losses and Standardised Heal
Digestibilities of Crude Protein and Amino Acids in Newly Weaned Pigs...............................................79
4.1 Summary........................................................................................................................................79
4.2 Introduction.....................................................................................................................................80
4.3 Materials and Methods...................................................................................................................81
4.3.1 Animals, Diets and Chemical Analyses......................................................................................81
4.3.2 Calculations.................................................................................................................................83
4.3.3 Statistical Analyses.....................................................................................................................85
4.4 Results and Discussion..................................................................................................................86
4.4.1 General Observations.................................................................................................................86
4.4.2 Effect of Dietary Protein and Amino Acid Level on Heal Recoveries of Crude Protein and
Amino Acids................................................................................................................................86
4.4.3 Estimates of Heal Recoveries of Crude Protein and Amino Acids from Casein and Basal
Heal Endogenous Crude Protein and Amino Acid Losses by Regression Analysis....................88
4.4.4 Effect of Dietary Crude Protein Level on Heal Crude Protein and Amino Acid Recoveries and
on Standardised Heal Digestibilities of Crude Protein and Amino Acids.....................................91
4.4.5 Effect of Period on Basal Heal Endogenous Crude Protein and Amino Acid Losses in Newly
Weaned Pigs...............................................................................................................................94
4.5 Conclusions....................................................................................................................................95
4.6 Acknowledgements........................................................................................................................95
4.7 References.....................................................................................................................................97
5 General Discussion...............................................................................................................................103
5.1 Introduction...................................................................................................................................103
5.2 Effect of Age, Body Weight or Animal on Basal Heal Endogenous Losses and on Heal
Digestibilities of Crude Protein and Amino Acids........................................................................104
5.3 Effect of Protein Source and Level...............................................................................................105
5.4 Conclusions..................................................................................................................................111
5.5 References...................................................................................................................................113
6 Summary...............................................................................................................................................119
7 Zusammenfassung...............................................................................................................................123
List of Tables
Table 1: Basal ileal endogenous crude protein and amino acid losses (g/kg DMI) in grower finisher pigs.... 9
Table 2: Basal ileal endogenous losses of crude protein and amino acids (g/kg DMI) in newly weaned
Pigs.....................................................................................................................................................9
Table 3: Range of basal ileal endogenous losses of crude protein and amino acids in pigs* fed a casein-
based diet (g/kg DMI).......................................................................................................................14
Table 4: Effect of age on total ileal endogenous amino acid losses in newly weaned pigs (g/kg DMI)........16
Table 5: Effect of weaning age on apparent ileal digestibilities of crude protein and amino acids (%) in
piglets...............................................................................................................................................17
Table 6: The break points (%DM), threshold levels (%DM), plateau and initial plateau digestibilities (%) in
soybean meal for grower finisher pigs.............................................................................................20
Table 7: Effect of graded dietary protein levels (% as-fed) on apparent ileal digestibilities of crude protein
and amino acids (%) in piglets.........................................................................................................21
Table 8: Formulation of the experimental diets............................................................................................38
Table 9: The chemical composition of casein and the experimental diets...................................................42
Table 10: Ileal dry matter digestibility (%) and apparent ileal digestibilities (%) of crude protein and amino
acids in the experimental diets.........................................................................................................43
Table 11 : Effect of experimental period on ileal dry matter digestibility (%) and apparent ileal digestibilities
(%) of crude protein and amino acids.............................................................................................45
Table 12: The estimates of the segmented quadratic with plateau relationship between apparent ileal
digestibilities (%) of crude protein and amino acids and their dietary contents (g/kg dry matter)
with their confidence intervals and the dietary threshold levels (g/kg dry matter) in newly weaned
pigs...................................................................................................................................................46
Table 13: Formulation (g kg 1, as-fed basis) of the experimental diets...........................................................59
Table 14: The analysed chemical composition (g kg , as-fed basis) of casein and the experimental diets... 64
Table 15. The contents (g kg DMI) of apparent ileal digestible crude protein and amino acids in the
experimental diets............................................................................................................................64
Table 16: Effect of different ranges of graded dietary levels of crude protein and amino acids on the
estimation of standardised ileal crude protein and amino acid digestibilities in casein ..................68
Table 17: Effect of different ranges of graded dietary levels of crude protein and amino acids on the
estimation of the levels (g kg DMI) of endogenous crude protein and amino acid losses in ileal
digesta .............................................................................................................................................69
Table 18: The estimates of the linear regression between dietary contents of apparent ileal digestible and
total crude protein and amino acids from the range of 90 to 220 g kg crude protein (n = 7, 22
observations)....................................................................................................................................70
Table 19: Effect of dietary levels of crude protein (g kg1, as-fed basis) on standardised ileal digestibilities
of crude protein and amino acids (%) in casein..............................................................................71
Table 20: Effect of experimental period on standardised ileal crude protein and amino acid digestibilities
(%) in casein ....................................................................................................................................72
Table 21: Formulation (g/kg) of the experimental diets..................................................................................82
Table 22: The chemical composition (g/kg, as-fed basis) of casein and the experimental diets....................87
Table 23: The recoveries of CP and AA (g/kg DMI) in ileal digesta...............................................................87
Table 24: Effect of different ranges of graded dietary levels of crude protein and amino acids on the
estimation of ileal recoveries of dietary crude protein and amino acids origianting from casein
(%) ...................................................................................................................................................90
Table 25: The linear relationships between the dietary crude protein content g/kg DM) and basal ileal
endogenous crude protein and amino acid losses (g/kg DMI) in newty-weaned pigs (n = 13,
observations = 33)............................................................................................................................92
Table 26: Effect of dietary levels of crude protein and amino acids (g/kg as-fed) on the standardised ileal
digestibilities of crude protein and amino acids 2 in casein (%)......................................................93
Table 27: Effect of experimental period on the amount of ileal recoveries of crude protein and amino acids
(g/kg DMI)1.......................................................................................................................................95
IV
List of Figures
Figure 1 : The segmented quadratic with plateau relationship between apparent ileal digestibilities of
crude protein and amino acids (%) and their dietary contents (% OM) in soybean meal for
grower finisher pigs (Fan et al. 1994).......................................................................................19
Figure 2: Origin of crude protein and amino acids at the terminal ileum...................................................20
Figure 3 A-F: The quadratic with plateau relationships between apparent ileal crude protein and amino
acid digestibilities (%) and dietary crude protein and amino acid content (g/kg DM);
(A) crude protein, (B) methionine, (C) threonine, (D) tryptophan, (E) glycine, (F) proline.......47
|
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| series2 | Berichte aus der Agrarwissenschaft |
| spelling | Eklund, Meike 1976- Verfasser (DE-588)133393135 aut Methodological considerations for the determination of standardised ileal amino acid digestibilities in piglets Meike Eklund Aachen Shaker 2007 VI, 125 S. graph. Darst. txt rdacontent n rdamedia nc rdacarrier Berichte aus der Agrarwissenschaft Zugl.: Hohenheim, Univ., Diss., 2007 piglets cabt amino acids cabt ileum cabt digestibility cabt methodology cabt Aminosäuren (DE-588)4142205-3 gnd rswk-swf Ferkel (DE-588)4154007-4 gnd rswk-swf Verdaulichkeit (DE-588)4317043-2 gnd rswk-swf Mischfutter (DE-588)4170107-0 gnd rswk-swf Rohprotein (DE-588)4424905-6 gnd rswk-swf Ration (DE-588)4314223-0 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Ferkel (DE-588)4154007-4 s Mischfutter (DE-588)4170107-0 s Ration (DE-588)4314223-0 s Rohprotein (DE-588)4424905-6 s Aminosäuren (DE-588)4142205-3 s Verdaulichkeit (DE-588)4317043-2 s DE-604 http://library.vetmed.fu-berlin.de/ResourceList/details/151903 lizenzfrei Abstract HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=022160116&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Eklund, Meike 1976- Methodological considerations for the determination of standardised ileal amino acid digestibilities in piglets piglets cabt amino acids cabt ileum cabt digestibility cabt methodology cabt Aminosäuren (DE-588)4142205-3 gnd Ferkel (DE-588)4154007-4 gnd Verdaulichkeit (DE-588)4317043-2 gnd Mischfutter (DE-588)4170107-0 gnd Rohprotein (DE-588)4424905-6 gnd Ration (DE-588)4314223-0 gnd |
| subject_GND | (DE-588)4142205-3 (DE-588)4154007-4 (DE-588)4317043-2 (DE-588)4170107-0 (DE-588)4424905-6 (DE-588)4314223-0 (DE-588)4113937-9 |
| title | Methodological considerations for the determination of standardised ileal amino acid digestibilities in piglets |
| title_auth | Methodological considerations for the determination of standardised ileal amino acid digestibilities in piglets |
| title_exact_search | Methodological considerations for the determination of standardised ileal amino acid digestibilities in piglets |
| title_full | Methodological considerations for the determination of standardised ileal amino acid digestibilities in piglets Meike Eklund |
| title_fullStr | Methodological considerations for the determination of standardised ileal amino acid digestibilities in piglets Meike Eklund |
| title_full_unstemmed | Methodological considerations for the determination of standardised ileal amino acid digestibilities in piglets Meike Eklund |
| title_short | Methodological considerations for the determination of standardised ileal amino acid digestibilities in piglets |
| title_sort | methodological considerations for the determination of standardised ileal amino acid digestibilities in piglets |
| topic | piglets cabt amino acids cabt ileum cabt digestibility cabt methodology cabt Aminosäuren (DE-588)4142205-3 gnd Ferkel (DE-588)4154007-4 gnd Verdaulichkeit (DE-588)4317043-2 gnd Mischfutter (DE-588)4170107-0 gnd Rohprotein (DE-588)4424905-6 gnd Ration (DE-588)4314223-0 gnd |
| topic_facet | piglets amino acids ileum digestibility methodology Aminosäuren Ferkel Verdaulichkeit Mischfutter Rohprotein Ration Hochschulschrift |
| url | http://library.vetmed.fu-berlin.de/ResourceList/details/151903 http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=022160116&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| work_keys_str_mv | AT eklundmeike methodologicalconsiderationsforthedeterminationofstandardisedilealaminoaciddigestibilitiesinpiglets |