Information Package / Course Catalogue
Dıgestıon Degrees In Feeds
Course Code: VHB565
Course Type: Area Elective
Couse Group: Second Cycle (Master's Degree)
Education Language: Turkish
Work Placement: N/A
Theory: 2
Prt.: 0
Credit: 2
Lab: 0
ECTS: 4
Objectives of the Course

Teaching definition of digestion, absorbtion and digestibility terms. Teaching the importance and principles of digestion trials. Explaining different methods included in digestion trials.

Course Content

Determination of digestibility levels of feeds and nutrients

Name of Lecturer(s)
Lec. Onur TATLI
Learning Outcomes
1.Knowing the meanings of digestion, digestibility and absrobtion terms
2.Understanding the importance of digestion trials in animal nutrition
3.Having information about the various methods of digestion trials.
4.Teaching the determination of feed digestibility levels
5.Connection with producer and teaching them Helping to producer for some management mistakes Capability for searching literature
Recommended or Required Reading
1.Fahey, G. C. (1994) Forage Quality, Evaluation and Utilization, American Society of Agronomy, Madison, USA.
2.Sauvant, D., Van Milgen, J., Faverdin, P., Friggens, N. (2011) Modelling Nutrient Digestion and Utilisation in Farm Animals, Wageningen Academic Publishers, Netherlands.
Weekly Detailed Course Contents
Week 1 - Theoretical
Digestion, absorbtion and digestibility terms. Factors affecting digestibility of feeds.
Week 2 - Theoretical
Classification of digestion trials. Importance of digestion trials.
Week 3 - Theoretical
Critical points considered in performing digestion trials. Equipments used in digestion trials.
Week 4 - Theoretical
Invivo digestion trials (classical method and indicator method)
Week 5 - Theoretical
Invivo digestion trials (difference method, various type of biological trials)
Week 6 - Theoretical
Invitro digestion trials- rumen digestibility (Tilley and Terry, enzyme methods)
Week 7 - Theoretical
Invitro digestion trials- rumen digestibility (Gas production and electrophoresis methods) (Midterm exam)
Week 8 - Theoretical
Determination of nutrient digestibility and nitrogen retention by invivo digestion trials
Week 9 - Theoretical
Invitro digestion trials- rumen digestibility (Gas production and electrophoresis methods)
Week 10 - Theoretical
Invitro digestion trials- intestinal digestibility (lysine bioavailability test, intestinal content and enzyme methods)
Week 11 - Theoretical
In situ methods- rumen digestibility (Dacron bag method)
Week 12 - Theoretical
In situ methods-Intestinal digestibility (Portative bag method)
Week 13 - Theoretical
Insitu/Invitro method with three steps
Week 14 - Theoretical
Near infrared spectroscopy
Week 15 - Final Exam
Final exam
Assessment Methods and Criteria
Type of AssessmentCountPercent
Midterm Examination1%30
Final Examination1%70
Workload Calculation
ActivitiesCountPreparationTimeTotal Work Load (hours)
Lecture - Theory143270
Assignment16612
Reading3116
Midterm Examination1617
Final Examination110111
TOTAL WORKLOAD (hours)106
Contribution of Learning Outcomes to Programme Outcomes
PÇ-1
PÇ-2
PÇ-3
PÇ-4
PÇ-5
OÇ-1
5
5
5
OÇ-2
5
5
OÇ-3
5
5
OÇ-4
5
5
OÇ-5
5
5
Adnan Menderes University - Information Package / Course Catalogue
2026