On the other hand, buffaloes are a very
sensitive type of animal; they are very sensitive to
any strange things they have seen or feel, so it may
be that because the feeds were novel, they ate less
than the cattle. Another possibility is that buffaloes
have a lower capacity to detoxify ammonia in liver,
they consumed less UMC, It may also be that cattle
may use NPN more effi ciently than buffaloes. This
should be assessed in future studies.
To better understand the recycling of
nitrogen in buffaloes, we consider the nitrogen
concentration in the rumen. If the nitrogen recycles
to the rumen from the plasma, then inevitably the
amount of NH3 would be higher in the rumen fl uid
of buffalo and serve to supplement the microbes.
Thanh (2012) reported the results of rumen
fl uid NH3 when feeding animals with rice straw
with different levels of urea. Both buffaloes and
cattle consumed the same treated feed NH3 was
signifi cantly higher in buffaloes although NH3
concentration in the rumen of both type of animal
increased with increased levels of urea added.
In this experiment, we performed the trial
on farm animals. The results in Table 2 show that
when a large number of animalsgrazed on a natural