EVALUASI KONSENTRASI DEBU (PM 10), AMONIA (NH3), HEN DAY PRODUCTION (HDP), DAN MORTALITAS AYAM PETELUR DI KANDANG CLOSED HOUSE

The closed-house housing system is designed to optimize layer chicken productivity through environmental control; however, high population density poses a risk of increasing ammonia (NH3) and dust (PM10) pollutants during the rearing process. This study aims to evaluate ammonia gas concentrations, dust particles, Hen Day Production (HDP), and mortality rates of layer chickens reared in a closed-house system. The research utilized 19,200 Isa Brown strain layer chickens, aged 25 weeks, housed in an H-frame type closed-house for a duration of 31 days. The feed provided contained 18.8% Crude Protein (CP) and 2755 kcal of Metabolic Energy (ME). An observational method was employed for this study. The observed variables included ammonia gas, PM10 dust, Hen Day Production (HDP), and mortality. The collected data were analyzed using descriptive quantitative methods. The results indicated that during the observation period, the ammonia level produced was 7.2 ppm and the dust concentration was 33 µg/m³. Under these environmental conditions, the HDP and mortality rates remained within standard limits, recorded at 92% and 0.6%, respectively. The study concludes that since ammonia levels remained below the threshold of 20 ppm and dust levels were within safe categories, they did not adversely affect productivity during the rearing period.