IS THERE ANY DIFFERENCE ON THE RECYCLING UREA BEI WEEN BUFFALOES AND CATTLE

Abstract

Indigenous of the urea recycled to the rumen could be as a source of nitrogen for
microbes that would be digested in the intestines. Most of research work done in ruminant nutrition were all conducted in the stage of maintenance to know the effect of feed composition on the flux variation of indigenous urea to the rtnnen, and very little work on the recycling variation in the ruminal of indigenous animal in Indonesia The first study concerning urea recycling was that there was evidence of urea found in the saliva and years before this, it was observe that the urea transferred to the rumen was via rumen wall. Based on this finding, some
research worker then treat to observe that urea produced in the organism was not totally excreted in the urine, on the contrary part of it will transferred to the digestive tract About 50-80% of the total urea entering the digestive tract would be degraded especially in the large intestine. Development of technique using radio isotope marker could determine the urea traffic in the digestive tract (rurnen and intestine). Rumen is the major place of urea utilization, urea are transferred to the microbes as it has the capability of using nitrogen in that kind of form. The
urea will enter rumen together which saliva or directly penetrate the rurnen wall. Regulation and control of these mechanisms are still in discussion, there is probably a role of kidney in the regulation. The more important thing to determine is whether the kidney fimction has a role in the process of tiln-ation in the glomenilus of the recycling. This question should be answer since from the previous preliminary study in our laboratory, with the difference species of animal
namely buffaloes was much higher (30.75 mg/dl) compared to that of the cattle (19.2 mg/dl). For the data obtained, should have been a major key in detecting the difference of urea, recycled. That differences of urea recycled probably was caused by the role of kidney glomerulus filtration that is different between species of animal.