Information Package / Course Catalogue
Silage and Foragetechnology
Course Code: ZT450
Course Type: Area Elective
Couse Group: First Cycle (Bachelor's Degree)
Education Language: Turkish
Work Placement: N/A
Theory: 2
Prt.: 0
Credit: 2
Lab: 0
ECTS: 3
Objectives of the Course

The objective of this course is to introduce students to the morphological, chemical, and agronomic characteristics of forages, and to teach the fundamental principles of high-quality hay and silage production. The curriculum covers practical field applications, including the Penn State Particle Size Separator, creep grazing strategies in pastures, and silage additives. Additionally, the nutritional values, feeding qualities, and production potentials of various forage sources are comprehensivey evaluated.

Course Content

1. Morphological and physical characteristics of forages, and their significance in terms of rumen health, rumen physiology, and rumination behavior. 2. Chemical (Proximate analysis, Van Soest fiber fractions, and digestibilities) and physical (particle size distribution) methods used to evaluate forage quality. 3. Intrinsic and extrinsic factors influencing the nutrient composition and feeding value of forages, with a primary focus on the vegetation stage (harvest maturity). 4. Production potentials of pastures and meadows, creep grazing management systems, and the agronomic and nutritional attributes of grass and legume forages. 5. Nutritional values of alternative forage sources (agro-industrial co-products, crop residues) and their utilization strategies in livestock production. 6. Methods of forage preservation (haymaking and ensiling) along with their core biological, microbiological, and physical principles.

Name of Lecturer(s)
Learning Outcomes
1.Explains the morphological and physical characteristics of forages along with their effects on rumen health, rumen physiology, and rumination behavior.
2.Evaluates the chemical (Proximate, Van Soest fiber fractions, digestibilities) and physical (particle size distribution via Penn State Particle Size Separator) analytical methods used in the determination of forage quality.
3.Analyzes the intrinsic and extrinsic factors influencing the nutrient composition and feeding value of forages, with a primary focus on the vegetation stage (harvest maturity).
4.Defines the agronomic and nutritional characteristics of pasture-meadow production potentials, creep grazing systems, grass/legume forages, and alternative agro-industrial co-products, and develops management strategies.
5.Compares and interprets the core biological principles of forage haymaking and ensiling (anaerobic preservation) technologies, silage fermentation biochemistry, and the effects of additives on the final feed quality.
Recommended or Required Reading
1.Cheeke, P.R. 2005. Applied Animal Nutrition. Feeds and Feeding
2.Givens, D.I., Owen, E., Axford, R.F.E., Omed, H.M. 2000. Forage Evaluation in Ruminant
3.Filya, İ. 2006. Silaj yapımı teknolojisi ve kullanımı. Süt hayvancılığı eğitim merkezi yayınları
Weekly Detailed Course Contents
Week 1 - Theoretical
Definition of Forages: Definition of forages based on morphological, physical, and nutritional criteria; their critical importance for rumen physiology, chewing/rumination behavior, and rumen health.
Week 2 - Theoretical
Proximate (Weende) and Van Soest analytical methods; general nutrient compositions. Chemical distribution of structural (NDF, ADF, cellulose, lignin) and non-structural carbohydrates.
Week 3 - Theoretical
Relationships Between Nutrient Content and Feeding Value: Direct and inversely proportional interactive relationships between vegetation stage nutrient contents and digestibility/feeding value in forages; Physical Characteristics of Forages and the Penn State Particle Size Separator.
Week 4 - Theoretical
Biomass yields, botanical composition, nutrient and feeding value of pasture-meadow vegetation, and utilization strategies in creep grazing.
Week 5 - Theoretical
Biomass Yields and Feeding Values of Cereal Forages - 1: Per unit area biomass yields, climatic requirements, morphological characteristics, and fiber structures of corn forage and cereal forages (barley, wheat, oat hays).
Week 6 - Theoretical
Agronomic characteristics, feeding values, and practical limitations in ruminant nutrition of sorghum-sudangrass, sunflower, and other annual/perennial grasses.
Week 7 - Theoretical
Biomass Yields and Feeding Values of Legume Forages: Climatic requirements, biomass yields, nutrient and feeding values of legume species, primarily alfalfa, sainfoin, vetch, and clover types, and their utilization in ruminant nutrition.
Week 8 - Theoretical
Grass - Legume Mixed Forages: Agronomic advantages, nutrient compositions, and feeding values.
Week 9 - Theoretical
Nutrient compositions and feeding values of agro-industrial co-products (pulps), tree leaves, and crop residues (straw, etc.) that can be utilized as alternative forages.
Week 10 - Theoretical
Principles of High-Quality Hay and Silage Production: Effects of preservation methods on nutrient and feeding value; core biological and physical principles of haymaking technologies (natural/artificial) and ensiling (anaerobic preservation).
Week 11 - Theoretical
Technical characteristics, mechanization, and comparison of bunker (stack), trench, tower, round bale (wrapped), and plastic bag siloing systems.
Week 12 - Theoretical
Silage Fermentation and Biochemistry: Microbiological phases of silage; mechanisms of carbohydrate fermentation by lactic acid bacteria (LAB) under anaerobic conditions, pH decline, and stabilization biochemistry.
Week 13 - Theoretical
The Concept of Silage Quality and Feeding Value of Silages: Determination of silage quality, practical intake limitations, and feeding values of silages.
Week 14 - Theoretical
Fermentation stimulants (bacteria, molasses, cereals), fermentation inhibitors (acids/salts), and absorbents used to improve silage quality and prevent aerobic spoilage.
Assessment Methods and Criteria
Type of AssessmentCountPercent
Attending Lectures1%5
Quiz1%5
Midterm Examination1%40
Final Examination1%50
Workload Calculation
ActivitiesCountPreparationTimeTotal Work Load (hours)
Lecture - Theory142256
Quiz2114
Midterm Examination1617
Final Examination1718
TOTAL WORKLOAD (hours)75
Contribution of Learning Outcomes to Programme Outcomes
PÇ-1
PÇ-2
PÇ-3
PÇ-4
PÇ-5
PÇ-6
PÇ-7
PÇ-8
PÇ-9
PÇ-10
PÇ-11
OÇ-1
4
3
OÇ-2
4
5
3
5
4
2
2
OÇ-3
4
4
3
4
4
OÇ-4
3
4
3
3
3
3
3
4
3
4
OÇ-5
4
4
3
4
3
2
3
3
4
4
Adnan Menderes University - Information Package / Course Catalogue
2026