By Robert H. Nelson

ISBN-10: 0080237568

ISBN-13: 9780080237565

ISBN-10: 0080237576

ISBN-13: 9780080237572

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Extra info for An Introduction to Feeding Farm Livestock

Sample text

Some simple compounds such as glucose or common salt require no digestion, and can be absorbed as they are, but the more complex constituents require digestion. Proteins are broken down to amino acids, fats to fatty acids and glycerol, and carbohydrates into simple monosaccharides (see previous chapters). The breaking-down process is a series of chemical reactions with a number of intermediate products. Each stage of the process is brought about by the action of an enzyme which is a special substance produced by the digestive system for this purpose.

The minerals must be in the form of simple salts dissolved in the soil moisture before they can be taken up by the root hairs into the plant. g. sugars, protein. g. common salt. 29 30 An Introduction to Feeding Farm Livestock consequently, from a deficiency. Moreover, such a deficiency may be passed on to the grazing animal which feeds on the plant. It is not always a case of an absolute deficiency that is the trouble. Sometimes an imbalance between minerals occurs. For reasons that are not fully understood, a concentration of one particular mineral may lead to an apparent deficiency of another, which may again show itself as a deficiency in the animal.

Hay that is made quickly under ideal conditions generally has the highest feeding value, although very good hay can be made by allowing the material to " m a k e " slowly on tripods. Many of the nutrients are lost if the grass stays green after cutting or if it lies for several days being washed out by the rain and bleached by the sun. Under such conditions, a black dusty material is produced with more stem than leaf, and the feeding value is reduced to a minimum. Good hay should have light green colour with plenty of leaf and a sweet (non-musty) smell.

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An Introduction to Feeding Farm Livestock by Robert H. Nelson

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