Impact of separating dairy cattle excretions on ammonia emissions.

  title={Impact of separating dairy cattle excretions on ammonia emissions.},
  author={Venkata K. Vaddella and Pius M. Ndegwa and Hungsoo Joo and Jeffrey Layton Ullman},
  journal={Journal of environmental quality},
  volume={39 5},
About 80% of dairy cattle N intake is excreted in urine and feces. Urinary-N is about 75% urea, whereas fecal-N is mostly organic. Urinary-N (urea) can only be volatilized when it is hydrolyzed to ammonia (NH3) in a process catalyzed by urease, which is predominantly found in feces. Minimizing contact between urine and feces may be an effective approach to reducing urea hydrolysis and subsequent NH3 emissions. Previous studies have reported 5 to 99% NH3 emissions mitigation within barns from… 

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