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Feed Conditioning Effects on Enzymes, Amino Acids, and Subsequent Broiler Performance.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Feed Conditioning Effects on Enzymes, Amino Acids, and Subsequent Broiler Performance./
作者:	Lynch, Elizabeth Ann.
面頁冊數:	1 online resource (92 pages)
附註:	Source: Masters Abstracts International, Volume: 84-03.
Contained By:	Masters Abstracts International84-03.
標題:	Pathogens. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29283580click for full text (PQDT)
ISBN:	9798845459398

Feed Conditioning Effects on Enzymes, Amino Acids, and Subsequent Broiler Performance.
Lynch, Elizabeth Ann.

Feed Conditioning Effects on Enzymes, Amino Acids, and Subsequent Broiler Performance. - 1 online resource (92 pages)

Source: Masters Abstracts International, Volume: 84-03.

Thesis (M.Sc.)--West Virginia University, 2022.

Includes bibliographical references

There are many things that can be done to improve broiler performance including, but not limited to, pelleting, proper Lys inclusion, and exogenous enzyme supplementation. Pelleting has the ability to improve feed form, reduce wastage, improve bird performance metrics, and decrease pathogens within the feed. Pathogen reduction can be further reduced by hygienic pelleting practices which include an increase in temperature or retention time within a conditioner or hygieniser. However, hygienic pelleting can degrade valuable AA and enzymes (more specifically for the current thesis research Lys and phytase) and make them unavailable to the animal. Supplementing Lys to account for the loss can increase the price of feed production but can be balanced by the improvement in broiler LWG. Performing research on novel phytases to improve enzyme activity after the addition of heat and within the digestive tract of the bird critical in order to improve bird performance metrics. Evaluating high conditioning temperature and exposure time within the pelleting process (hygienic pelleting) in diets that vary in digestible lysine and corresponding amino acid ratio on Ross 708 starter broiler performance, amino acid digestibility, and requirement is the purpose of the initial study. A 5 x 2 factorial arrangement of treatments with 5 levels of digestible lysine (- 20%, -10%, 2019 Ross Broiler Starter Nutrition recommendation, +10%, and +20%) and 2 degrees of pelleting (Standard and Hygienic) was utilized in a randomized complete block design. Each treatment was fed to 12 replicate pens of 10 male broiler Hubbard x Ross 708 chicks for a 21-day period. On the morning following day 7, 14 and 21, birds and feed were weighed by pen for performance calculations and ileal contents were collected on d22 for AA digestibility calculations. Standard Pelleting and Hygienic Pelleting demonstrated a 1.19 and 1.37% Lys requirement, respectively, using the broken-line regression model. Performance data and the broken-line regression model suggest an approximate 10% increase in Lys and corresponding amino acid ratio relative to 2019 Ross Broiler Starter Nutrition Specifications for Hygienic Pelleting to provide optimal live weight gain. Hygienic Pelleting decreased amino acid digestibility and increased subsequent FCR when diets were formulated to decreased amino acid density.The assessment of novel exogenous phytase enzymes that can be added to the mixer prior to pelleting is important for the continual improvement of global broiler production. Two experiments were conducted to determine in vitro activity post pelleting and in vivo efficacy post feeding of a novel phytase. The objective of the first study was to determine activity and retention of a novel phytase enzyme (CJ Phytase) and a commercially available phytase (Quantum Blue 5G®) at different 30 second conditioning temperatures (75, 80, 85, and 90˚C) post-pelleting. The objective of the second study was to determine the effects of these phytase sources conditioned for 30 seconds at the 75˚C conditioning temperature on broiler performance, bone mineralization, and mineral digestibility. Experiment one consisted of a 2 (phytase source) x 4 (conditioning temperature) factorial arrangement. A conditioning temperature main effect (P=0.0003) demonstrated that activity of both phytase products decreased at 85˚C and decreased again at 90˚C.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798845459398Subjects--Topical Terms:

3540520
Pathogens.
Index Terms--Genre/Form:

542853
Electronic books.

Feed Conditioning Effects on Enzymes, Amino Acids, and Subsequent Broiler Performance.
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502 $a Thesis (M.Sc.)--West Virginia University, 2022.
504 $a Includes bibliographical references
520 $a There are many things that can be done to improve broiler performance including, but not limited to, pelleting, proper Lys inclusion, and exogenous enzyme supplementation. Pelleting has the ability to improve feed form, reduce wastage, improve bird performance metrics, and decrease pathogens within the feed. Pathogen reduction can be further reduced by hygienic pelleting practices which include an increase in temperature or retention time within a conditioner or hygieniser. However, hygienic pelleting can degrade valuable AA and enzymes (more specifically for the current thesis research Lys and phytase) and make them unavailable to the animal. Supplementing Lys to account for the loss can increase the price of feed production but can be balanced by the improvement in broiler LWG. Performing research on novel phytases to improve enzyme activity after the addition of heat and within the digestive tract of the bird critical in order to improve bird performance metrics. Evaluating high conditioning temperature and exposure time within the pelleting process (hygienic pelleting) in diets that vary in digestible lysine and corresponding amino acid ratio on Ross 708 starter broiler performance, amino acid digestibility, and requirement is the purpose of the initial study. A 5 x 2 factorial arrangement of treatments with 5 levels of digestible lysine (- 20%, -10%, 2019 Ross Broiler Starter Nutrition recommendation, +10%, and +20%) and 2 degrees of pelleting (Standard and Hygienic) was utilized in a randomized complete block design. Each treatment was fed to 12 replicate pens of 10 male broiler Hubbard x Ross 708 chicks for a 21-day period. On the morning following day 7, 14 and 21, birds and feed were weighed by pen for performance calculations and ileal contents were collected on d22 for AA digestibility calculations. Standard Pelleting and Hygienic Pelleting demonstrated a 1.19 and 1.37% Lys requirement, respectively, using the broken-line regression model. Performance data and the broken-line regression model suggest an approximate 10% increase in Lys and corresponding amino acid ratio relative to 2019 Ross Broiler Starter Nutrition Specifications for Hygienic Pelleting to provide optimal live weight gain. Hygienic Pelleting decreased amino acid digestibility and increased subsequent FCR when diets were formulated to decreased amino acid density.The assessment of novel exogenous phytase enzymes that can be added to the mixer prior to pelleting is important for the continual improvement of global broiler production. Two experiments were conducted to determine in vitro activity post pelleting and in vivo efficacy post feeding of a novel phytase. The objective of the first study was to determine activity and retention of a novel phytase enzyme (CJ Phytase) and a commercially available phytase (Quantum Blue 5G®) at different 30 second conditioning temperatures (75, 80, 85, and 90˚C) post-pelleting. The objective of the second study was to determine the effects of these phytase sources conditioned for 30 seconds at the 75˚C conditioning temperature on broiler performance, bone mineralization, and mineral digestibility. Experiment one consisted of a 2 (phytase source) x 4 (conditioning temperature) factorial arrangement. A conditioning temperature main effect (P=0.0003) demonstrated that activity of both phytase products decreased at 85˚C and decreased again at 90˚C.
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538 $a Mode of access: World Wide Web
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650 4 $a Feeds. $3 659935
650 4 $a Agricultural commodities. $3 3562094
650 4 $a Ingredients. $3 3564179
650 4 $a Salmonella. $3 879055
650 4 $a Binding sites. $3 3560349
650 4 $a Seeds. $3 573605
650 4 $a Amino acids. $3 558768
650 4 $a Grain. $3 662330
650 4 $a Diet. $3 626002
650 4 $a Heat. $3 573595
650 4 $a E coli. $3 3556834
650 4 $a Environmental impact. $3 3564810
650 4 $a Metabolism. $3 541349
650 4 $a Research & development--R&D. $3 3554335
650 4 $a Enzymes. $3 520899
650 4 $a Microorganisms. $3 666946
650 4 $a Poultry. $3 783852
650 4 $a Dietary minerals. $3 3564181
650 4 $a Agronomy. $3 2122783
650 4 $a Animal sciences. $3 3174829
650 4 $a Industrial engineering. $3 526216
650 4 $a Microbiology. $3 536250
650 4 $a Nutrition. $3 517777
650 4 $a Statistics. $3 517247
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710 2 $a ProQuest Information and Learning Co. $3 783688
710 2 $a West Virginia University. $3 1017532
773 0 $t Masters Abstracts International $g 84-03.
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