Course code LauZ5034
Credit points 6
Feed Evaluation Systems
Total Hours in Course162
Number of hours for lectures32
Number of hours for seminars and practical classes32
Independent study hours98
Date of course confirmation09.04.2019
Responsible UnitInstitute of Animal Science
Course developer
Dzīvnieku zinātņu institūts
Lilija Degola
Dr. agr.
Prior knowledge
LauZ5143, Biological Basis of Animal Husbandry
LauZ5163, Biochemical and Physiological Aspects of Animal Nutrition
Course abstract
Feed energy and nutrients (protein, carbohydrate etc.) evaluation systems used as integrated evaluation systems for feedstuffs. Feedstuffs digestibility as a criterion of nutrition value, factors influencing digestibly. Digestibility determination methods "in vivo" and "in vitro".
Learning outcomes and their assessment
Students will gain an in-depth knowledge of feed energy and nutrient evaluation systems. Successfully take part in workshops. To study skills for feedstuffs evaluation according by various criteria and obtain skills for choose the best evaluation system in different animal nutrition. Successfully did practical works. Students will be competent to explain and justify feeds for different evaluation systems. Successfully passed exam.
Course Content(Calendar)
1. Complex evaluation systems of feedstuffs, history of its development.Lecturesw 2h.
2. Assessment systems for feedstuffs used in the EU and US.Lectures 2h.
3. Digestibility of nutrients as part of a complex evaluation system for feedstuffs.Lectures 2h. Practical works 4h.
4. Determination of digestibility of nutrients.Lectures 2h. Practical works 4h.
5. Factors affecting the digestibility of feed and feed intakes.Lectures 5h.
1. Workshop. The History of Nutrition Assessment Systems Development and Digestibility. Seminar 2h.
6. Gross energy , digestible, metabolizable and net energy as characteristics of the complete nutritional value of the nutrients. Lectures 2h.Practical works 2h.
7. Methods and content of energy determination in feedstuffs for animals of different species. Lectures 2h.
Workshop 2. Evaluation of feedstuffs by energy types. Energy requirement for animals.Seminar 2h.
8. Evaluation systems of protein value and its usability. Lectures 2h. Practical works 2h.
9. Protein degradation in fore stomach of ruminants, influencing factors.Lectures 2h, practical works 2 h.
Workshop 3. Protein Evaluation in Feedstuffs for Animals of Different Species-Seminar 2h.
10. Evaluation systems for various forms of carbohydrates and their role in ruminant and single-chamber stomach animals.Lectures 2h. Practical works 2h.
11. Classification of carbohydrates by Proximal and Van Soest analysis criteria.Lectures 2h. Practical works 2h.
12. Van Soest's Methods of Analysis for the Determination of Fibers, Neutral Detergent fibers and Acid Detergent fiber.Lectures 2h. Practical 2h.
13. The use of crude fiber and its influencing factors.Lectures 2h. Practical works 2h.
14. The role and evaluation of lipids in animal nutrition.
Workshop 4. Evaluation of carbohydrates and lipids and their role in animal nutrition. Lectures 2h. Practical works 2h.h.
15. Assessment and usefulness of the use of biologically active substances (minerals, vitamins and others) in animal nutrition. Lectures 2h.
Requirements for awarding credit points
Successfully did practical works and seminars, passed exam.
Description of the organization and tasks of students’ independent work
The student independently studies popular and scientific literature about topics of seminars.
Criteria for Evaluating Learning Outcomes
Student can get a successful mark on the exam if at least 50% of the questions are answered correctly. The practical work performed is evaluated according to the evaluation procedure specified in the practical task. Without the successful completion of practical works and seminars, student cannot take the exam.
Compulsory reading
1. Osītis U. Barības līdzekļu enerģētiskās un proteīna vērtēšanas sistēmas dažādās Eiropas valstīs. Jelgava: LLU, 1996. 95.lpp.
2. Osītis U. Dzīvnieku ēdināšana kompleksā skatījumā. Jelgava: Latvijas Lauku konsultāciju un izglītības centrs, 2005. 320.lpp.
3. Osītis U. Barības līdzekļu novērtēšana atgremotāju ēdināšanā. Jelgava: Latvijas Lauku konsultāciju un izglītības centrs, 1998. 102.lpp.
Further reading
1. Latvietis J. Lopbarība. SIA Latvijas Lauku konsultāciju un izglītības centrs. Ozolnieki, ISBN 978-9984-48-096-1, 2013. 308. Lpp.
2. Degola. L., Trūpa A., Aplociņa E. Lopbarības ķīmiskās analīzes un sagremojamība. SIA Drukātava, ISBN 978-9984-48-219-4, 2016. 52. lpp
3. World Review of Animal Production. World Association for Animal Production ISSN: 0043-8979.
4. Livestock Production Science Published/Hosted by Elsevier Science. ISSN: 0301-6226. 3. Pig International Published by Watt Publishing Company. ISSN: 0191-8834.
Periodicals and other sources
1. Populārzinātnisks žurnāls “Saimnieks”. Rīga : TEE BIO, 2004- ISSN 1691-1598.
2. Populārzinātnisks žurnāls “Agrotops” AgroTops. Rīga: Aģentūra Agro apgāds. ISSN 1407-5164.
3. Agronomy research, žurnāls, [tiešsaiste] [skatīts 10.02.2019.]. Pieejams http://agronomy.emu.ee/
4. Science Direct database. [Online] [viewed 14.02.2019.]. https://www.sciencedirect.com
5. Journal of Animal Science. Published/ American Society of Animal Science. ISSN (printed): 0021-8812. ISSN (electronic): 1525-3163
6. Zinātniski praktiskās konferences "Līdzsvarota lauksaimniecība" raksti. [tiešsaiste] [skatīts 14.02.2019.]. http://llufb.llu.lv
Notes
Feed Evaluation Systems