Course detail

LZT5862 - Feed Analysis and Composition


Credit hours

In-class work
per week
Practice
per week
Credits
Duration
Total
2
2
8
15 weeks
120 hours

Instructor
Carla Maris Machado Bittar

Objective
The program aims to provide some basic methodologies and feed analysis techniques. For this, students
will study and conduct in the laboratory the main feed composition analysis methods as well as interpret
the results considering diet formulation, levels of guarantee, and identification of fraud on feed
ingredients. Additionally, it aims to develop the student's critical view of analysis developed in research
projects.

Content
Concept and importance of feed science in animal husbandry. Knowledge of glassware and equipment to
be used in the laboratory. Weighing techniques. Good laboratory practice. Classification of feeds.
Importance of the sampling techniques according to the type of feed. Homogenization and sample
processing for analysis (pre-drying and grinding). Proximate composition, Weende method. Techniques
for determination of dry matter: oven, toluene method, lyophilization. Determination of mineral matter.
Fractionation of nitrogenous compounds according to the feed formulation software. Methods for
nitrogen determination and protein estimated values: Crude protein, non-protein nitrogen, soluble
nitrogen, true protein concept. Determination of crude fiber, limitations for feed formulation purposes.
Van Soest system of determining the fiber fraction: acid detergent fiber, neutral detergent fiber and
lignin. Non-structural carbohydrates determination methods: soluble carbohydrate, starch. Assays of
digestibility and degradability. Gross energy determination in bomb calorimeter and estimates of net and
metabolizable energy. Using the NIRS to estimate feed composition.

Bibliography
ANDRIGUETTO, J.M.; PELLY, L.; MINARDI, I.; GEMEAL, A.; FLEMMING, J.S.; SOUZA, G.A. de & BONA
FILHO, A. 1988. Nutrição Animal. Vol. 1. As Bases e os Fundamentos da Nutrição Animal: Os Alimentos.
4ed. Livraria Nobel. São Paulo.
CAMPOS, F.P.; NUSSIO, C.M.B.; NUSSIO, L.G. Métodos de análises de alimentos. Piracicaba: FEALQ,
2004. 135 p.
NASEM. Nutrient Requirements of Dairy Cattle. 2021. 8th Revised Edition. National Academies Science,
Engineering and medicine. National Academy Press. Washington, DC. 482p.
NRC. National Research Council. 2001. Nutrient Requirements of Dairy Cattle. 7th Ed. National Academy
Press. Washington, D.C. 381p.
NRC. National Research Council. 1996. Nutrient Requirements of Beef Cattle. 7th Ed. National Academy
Press. Washington, D.C.
NRC. National Research Council. 1985. Nutrient Requirements of Sheep. 6th Ed. National Academy
Press. Washington, D.C. 381p.
ROSTAGNO, H.S.; ALBINO, L.F.T.; DONZELE, J.L. et al. Composição de Alimentos e exigências
nutricionais de aves e suínos: Tabelas Brasileiras. Viçosa, MG. Universidade Federal de Viçosa, 2000.
141p.
SILVA, D.J.; QUEIROZ, A.C. Análise de alimentos: métodos químicos biológicos. 2. ed. Belo Horizonte:
Fundação de Ensino e Pesquisa em Medicina Veterinária, 2002. 265 p.
VALADARES FILHO, S.C.; ROCHA JR., V.R.; CAPPELLE, E.R. Tabelas brasileiras de composição de
alimentos para bovinos. Viçosa, MG: Universidade Federal de Viçosa, 2002. 297.
Journals:
- Journal of animal feed science and technology
- Journal of Dairy Science
- Journal of Animal Science