자료유형  

 학위논문

Control Number  

0016932679

International Standard Book Number  

9798379838348

Dewey Decimal Classification Number  

500

Main Entry-Personal Name  

Babatunde, Olufemi.

Publication, Distribution, etc. (Imprint  

[S.l.] : Purdue University., 2022

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2022

Physical Description  

1 online resource(208 p.)

General Note  

Source: Dissertations Abstracts International, Volume: 85-01, Section: B.

General Note  

Advisor: Adeola, Layi.

Dissertation Note  

Thesis (Ph.D.)--Purdue University, 2022.

Restrictions on Access Note  

This item must not be sold to any third party vendors.

Summary, Etc.  

요약The objective of this dissertation was to investigate areas that needed further research with regards to phosphorus, phytate, and phytase in monogastric nutrition. To fulfill this objective, a total of 6 studies were carried out.Study 1 was designed to evaluate the additivity of apparent ileal digestibility (AID) and standardized ileal digestibility (SID) of phosphorus (P) in mixed dies containing corn and soybean meal (SBM) and fed to broiler chickens. There were 7 dietary treatments in a randomized complete block design with body weight (BW) serving as the blocking factor. Treatments consisted of 4 semi-purified diets prepared to contain either corn or SBM as the sole source of P with or without phytase supplementation at 1,000 FYT/kg; 2 mixed diets containing corn and SBM with or without phytase addition; and a P-free diet (PFD) formulated to determine the basal endogenous loss (BEL) of P. A total of 512 day-old broiler chicks were fed a commercial starter diet for 21 days while experimental diets were fed for 3 days (day 22-24 post hatching). The BEL of P in broiler chickens as determined by the PFD was 166 mg/kg dry matter (DM). The SID of P in corn and SBM was 52.2 and 65.4 %, respectively. Phytase addition improved (P 0.05) both the AID and SID of P in the ingredient and mixed diets. There was no difference between the predicted and determined AID and SID of P in the mixed diets and were thus additive. It was concluded that the AID and SID of P in corn and SBM were additive with or without phytase addition. However, we could not be certain if the assumption of additivity will hold true in mixed diets containing ingredients with a higher phytate content and if age of birds affected the BEL of P.In the 2nd study, the additivity of AID and SID of P in mixed diets containing corn and canola meal (CCM) was investigated in broiler chickens at 2 ages. A total of 588 broiler chickens was used in this study. Dietary treatments were arranged as a 2 x 3 x 2 factorial with 2 ages (day 13 and 21), 3 diets (corn, canola meal, and CCM), and 2 levels of phytase (0 and 1,000 FYT/kg) in a randomized complete block design. A PFD was fed to birds at both ages to determine the effects of age on the BEL of P. A commercial starter diet were fed from day 1 to 10 or 18 post hatching and then experimental diets was fed for 3 days until day 13 or 21, respectively. The AID and SID of P was higher (P 0.05) in birds at day 13 as compared with birds at day 21 regardless of phytase addition. Similarly, the BEL of P in younger birds was higher (P 0.01) than in older birds at d 21. Regardless of age or phytase supplementation, the predicted and determined AID and SID of P in the CCM diets were similar and thus additive. In conclusion, age influenced the BEL of P and the utilization of minerals in broiler chickens while the assumption of additivity held true when mixed diets containing CCM was fed to birds at both ages with or without phytase addition.

Subject Added Entry-Topical Term  

Plasma.

Subject Added Entry-Topical Term  

Feeds.

Subject Added Entry-Topical Term  

Food.

Subject Added Entry-Topical Term  

Ingredients.

Subject Added Entry-Topical Term  

Nutrition research.

Subject Added Entry-Topical Term  

Carbohydrates.

Subject Added Entry-Topical Term  

Amino acids.

Subject Added Entry-Topical Term  

Diet.

Subject Added Entry-Topical Term  

Hogs.

Subject Added Entry-Topical Term  

Canola.

Subject Added Entry-Topical Term  

Energy.

Subject Added Entry-Topical Term  

Environmental impact.

Subject Added Entry-Topical Term  

Stomach.

Subject Added Entry-Topical Term  

Small intestine.

Subject Added Entry-Topical Term  

Large intestine.

Subject Added Entry-Topical Term  

Analytical chemistry.

Subject Added Entry-Topical Term  

Cellulose.

Subject Added Entry-Topical Term  

Birds.

Subject Added Entry-Topical Term  

Enzymes.

Subject Added Entry-Topical Term  

Poultry.

Subject Added Entry-Topical Term  

Agronomy.

Subject Added Entry-Topical Term  

Animal sciences.

Subject Added Entry-Topical Term  

Chemistry.

Added Entry-Corporate Name  

Purdue University.

Host Item Entry  

Dissertations Abstracts International. 85-01B.

Host Item Entry  

Dissertation Abstract International

Electronic Location and Access  

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Control Number  

joongbu:643307