This study was conducted to evaluate the effects of sea urchin shell powder on nitrogen characteristics in poultry litter by assigning ninety 1-d-old male broiler chicks (Arbor Acres) to one of 3 treatments (control, 1% sea urchin shell powder, and 1% feed additives) in 3 replicates of 10 birds each. For all treatments, the overall dry matter contents were decreased (P < 0.05) as time increased, except for at 1 week. When compared with controls, the dietary sea urchin shell powder and feed additives for 0 and 3 weeks did influence their TN contents, but not for 1, 2 and 4 weeks. The treatments with sea urchin shell powder and feed additives had a significant (P < 0.05) influence on NH3-N in poultry litter compared with controls. However, at 4 weeks, no marked differences were observed in NH3-N contents among treatments. Treatments with 1% sea urchin shell powder might enhance the value of poultry litter as N fertilizer

Abstract
 1. Introduction
 2. Materials and methods
 3. Results and Discussion
 4. Conclusion
 References

• Tae Ho Chung(Department of Companion Animal & Animal Resources Science, Joongbu University)
• In-Hag Choi(Department of Companion Animal & Animal Resources Science, Joongbu University) Corresponding author