Ruminant Nutrition

Comment

Comment by dr sandeep bansal on February 19, 2010 at 12:58am

ammonia is a week base having a pka of about 9.02 thus rise in ruminalfluid ph causes more of the NH4+ to be converted to ammonia . absorption of ammonia across rumen wall is influenced by rumen fluid ph & by concentration gradient. absorbed ammonia is trasported to the liver where it is converted to urea . in general the level of ammnia found in the blood of ruminants is low but rises repidly after excessive urea fedding . liver was abilty to convert ammonia to urea repidly enough to prevent urea toxicity until the portal blood ammonia level reached .8 mm . the level ot 55 to 60 mm ammonia in the rumen fluid is required to couse this level in blood .

Comment by Dr. Amit Arora on February 18, 2010 at 10:35am

Dear Mr.,Joaquin Armando Paulino, Interesting comments. Thanks a lot. What makes the extra nitrogen in a poorly fed animal safer than in a well fed one?

Comment by Joaquin Armando Paulino on February 18, 2010 at 9:08am

According to Church et. al. (1974), between 0.18 and 0.227 gr / lb of weight required to kill an animal in a state of malnutrition, and about 0.29 to 0.34 gr / lb for a well-fed animal, when consumed in less than 30 minutes. In other words, if the supplement contains 30% crude protein equivalent of urea, would require a consumption of 1.56 to 1.8 kg of food to kill a poorly fed animal of 450 kg, and 2.3 to 2.9 kg to kill a well-fed animal of equal weight.
This suggests that a poorly fed animal can consume a concentrated urea with 3.5 percent without risk of toxicity

Comment by Dr. Amit Arora on October 19, 2009 at 9:45am

Dear Dr.

As per BIS it is 1% of the concentrate but 0.6-1% of the DM are with in safer limits provided there is enough carbohydrate skeleton available for the rumen microbes to convert it into microbial protein. Urea in India being very economical, if used judiciously can cut down on price and improve feed quality.

Comment by mahesh ahlawat on October 18, 2009 at 2:18pm

what is the safe level of urea in dairy cattle ration. and what are the benefits of using in feed