Preprint Technical Note Version 1 This version is not peer-reviewed

Basic Laboratory Manual: Analysis of Animal Feed and Physical Evaluation

Version 1 : Received: 5 November 2024 / Approved: 6 November 2024 / Online: 6 November 2024 (13:02:14 CET)

How to cite: Alemu, M. G.; Wudu, A. M. Basic Laboratory Manual: Analysis of Animal Feed and Physical Evaluation. Preprints 2024, 2024110421. https://doi.org/10.20944/preprints202411.0421.v1 Alemu, M. G.; Wudu, A. M. Basic Laboratory Manual: Analysis of Animal Feed and Physical Evaluation. Preprints 2024, 2024110421. https://doi.org/10.20944/preprints202411.0421.v1

Abstract

This laboratory manual provides essential protocols and procedures for analyzing animal feed in the Animal Nutrition Laboratory at Wollo University. It is tailored to assist researchers, technical assistants, and students in evaluating feed quality to optimize ruminant nutrition, especially under arid conditions where feed costs impact livestock productivity. The manual covers safety guidelines, sample preparation, and detailed procedures for determining moisture, dry matter, crude protein, crude fiber, ether extract, and ash content in animal feed samples. Special emphasis is placed on using the Kjeldahl method for protein determination and the Soxhlet apparatus for fat extraction. Additionally, the manual includes methods for producing urea molasses blocks, a valuable supplementary feed. Physical evaluation techniques such as assessing color, texture, odor, and mold presence are highlighted for rapid feed quality assessment, ensuring safe and effective diets.

Keywords

Animal feed analysis; crude protein; dry matter; Kjeldahl method; Soxhlet extraction; physical evaluation

Subject

Chemistry and Materials Science, Food Chemistry

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