Adding urea to cattle is only suitable for winter and spring seasons with poor quality feed such as wheat straw, dried corn stover and hay. It is not advisable to add urea to the summer and autumn seasons where grass is the mainstay. Because the use of urea to feed cattle, the level of crude protein contained in the feed should not be too high. Tests have shown that when the crude protein content in the feed is below 11%, the utilization rate of urea in the rumen is about 70%. The effect of increasing the weight gain of cattle is quite obvious (up 39%); as the crude protein content in the feed increases, the effect of increasing the weight gain is reduced by adding urea; when the crude protein content in the feed reaches 12% or more, Feeding urea has not increased the effect of weight gain, but instead began to affect weight gain or significant weight loss.
In summer and autumn, cattle often feed on the seeds of grass and plants. In these feeds, the nutrients contained in the feed are more comprehensive, especially the crude protein content is higher, generally between 12% and 20%.
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