Nutritive Value of Feedstuffs

Nutritive Value of Feedstuffs - Nutritive Value of...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Nutritive Value of Feedstuffs Before formulating a balanced dietary ration for an animal or group of animals, one must know the dietary needs of the species, specific to maturity and gender, as well as the nutrients available in the feeds. Environment, activity level, and desired results must also be taken into account. Using proximate analysis of feedstuffs, it is possible to learn the amount of water, crude fat, crude fiber, crude protein, ash, and nitrogen-free extracts of feeds. The amount of water is found by drying the feed, then subtracting the dry matter from the original weight. Crude fat is measure in terms of ether extract; fat is soluble in ether. Crude fiber consists of the cellulose, lignin, and hemicellulose in the sample. The amount of ash is found by burning the remaining materials at 700°F; the leftovers are the mineral ash. Nitrogen-free extract levels must be obtained mathematically; it is a measure of the sugar and starches, as well as some soluble hemicellulose, in feed. An approximate measure of the total (crude) protein in a feed is taken by multiplying the amount of nitrogen by 6.25. The true protein may by considered the digestible protein, that is the amount of protein available to be absorbed and utilized by the animal, which is usually somewhat less than the total protein. Higher quality feeds have larger amounts of digestible proteins. It is possible for an animal to meet its full requirement of protein and still not show proper growth. If an animal has an energy deficiency in its diet, the body will use the protein consumed for energy. If the protein is of very poor quality or incorrect digestibility, the animal
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern