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The Effect of Cottonseed in the Ration on Percentage of Fat and Serum Solids Content of Milk

University of Arizona, Tucson

ABSTRACT

An experiment to study the effect of feeding cottonseed on the fat and serum solids content of the milk was conducted using twelve cows for three 28-day reversal periods.

1. The replacement of 2 pounds of the concentrates in the ration with 2 pounds of cottonseed produced an increase in the fat content for the first 20 days.
   
2. The fat test for the last 8 days of the experiment was slightly lower than that of the control. The fat test of the cottonseed feeding periods were higher, with a combined range of 3.55 to 4.57 per cent as compared to 3.61 to 4.44 per cent for the, combined control periods.
   
3. There was no significant difference in the milk production for the two periods.
   
4. The cottonseed did not produce a corresponding increase in serum solids. In fact, the serum solids content was slightly reduced.
   
5. Palatability of cottonseed is a limiting factor in its use when mixed with rolled barley, wheat bran, and cottonseed meal.