Substitui o de ur谷ia por cloreto de am nio em dietas de bovinos: digestibilidade, s赤ntese de prote赤na microbiana, parametros ruminais e sangu赤neos = Replacing urea with ammonium chloride in cattle diets: digestibility, synthesis of microbial protein, and rumen and plasma parameters

作者：Roman David Castaeda; Antonio Ferriani Branco; Sabrina Marcantonio Coneglian; Julio Cesar Barreto

来源：Acta Scientiarum - Animal Sciences, 2009.

• derivativos de purina
• fermenta o ruminal
• ingest o
• nitrogenio n o-proteico
• ruminantes
• sais ani nicos
• purine derivatives
• ruminal fermentation
• intake
• non-protein nitrogen
• ruminants
• anionic salts

Foram utilizados cinco bovinos machos, castrados, da ra a Holandesa Preta e Branca, com 450 kg de peso vivo em um delineamento quadrado latino 5 x 5, sendo os tratamentos cinco n赤veis de substitui o, 0, 25, 50, 75 e 100% de ureia por cloreto de am nio, como fontes de nitrog那nio n o-proteico da dieta. Houve redu o linear (p 0,05) a excre o de alanto赤na e de derivados de purinas na urina, purinas absorvidas, s赤ntese de compostos nitrogenados microbianos e efici那ncia de s赤ntese de prote赤na microbiana. Houve queda linear (p 0,05) a concentra o de am nia no r迆men. O cloreto de am nio pode ser utilizado como fonte de NNP para bovinos em n赤veis de at谷 1,4% da mat谷ria seca total da dieta. Five Holstein steers weighting 450 kg were used in a 5 x 5 Latin square statistical design, where treatments consisted of five replacement levels: 0, 25, 50, 75 and 100% of urea by ammonium chloride, as non-protein nitrogen in the diet. There was a linear decrease (p 0.05) daily excretion of allantoin, purine derivatives, absorbed purines, as well as microbial nitrogen compounds and microbial efficiency synthesis. Rumen pH and plasma urea nitrogen decreased linearly (p 0.05) ruminal ammonia concentration as urea was replaced by ammonium chloride. Ammonium chloride can be used as a nonprotein nitrogen source in ruminant diets up to level of 1.4% of diet dry matter.