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Increased use of forage and roughage in dairy production

Michigan State College

Abstract

1. Experiments with alfalfa hay alone for milking cows give results which vary from 150 to 376 pounds of butterfat per year.
   
2. The cause of this variation in production on alfalfa hay is not known. It may be due to difference in genetic constitution.
   
3. The most logical explanation of this difference appears to be a difference in productive energy, or to a fat deficiency, or to both.
   
4. Alfalfa hay low in phosphorus as the sole ration for milking cows may be deficient in phosphorus. A difference in the phosphorus content of the hay, however, does not appear to explain the difference in production secured by the various experiment stations which have investigated this problem.
   
5. A greater use of perennial grass and legume, pasture, silage and hay crops before lignification locks up the nutrients is indicated.
   
6. The value of such feeds should be investigated thru the use of long time feeding experiments, associated with digestion trials to determine the digestibility of the nutrients.