Effectiveness of adding herbal mixture to the diet in reducing odor pollution in broder chicken production

Abstract

The study was conducted from June 2022 to November 2023 on F1 (Dong Tao x Luong Phuong) hybrid broiler chickens from 8-12 weeks of age to evaluate the effectiveness of mixed herb supplementation including monophylum, cinnamon, anise and Pseuderanthemum latifolium into the diet to reduce NH3 and
H2 S emissions in broiler chicken farm. The study was conducted using the comparative plot method at poultry farm, experimental setup included: 1 control plot (DC) – without supplementing herbal mixture, 3 experimental plots (CT1, CT2, CT3) - supplementing 1%, 1.5%, 2% herbal mixture, respec tively into diet
for chickens, and 2 replicates. The studied result showed that supplementing herbs into the diet effected in reducing NH3 and H2 S emissions from chicken manurer. After 14 days, the amount of NH3  emitted from chicken manure in the CT1, 2, 3 reduced compared to the start time point of experiment, and the amount of NH3 in the CT3 reduced higher compared to the DC, CT1 and CT2. After 28 days, the amount of NH3 in the CT3 reduced much higher compared to the DC, CT1 and CT2 with 75%, 50% and 33.3%, respectively. Similarly, mixed herb supplementation was effective in reducing H2S emissions from chicken manure in the CT1, 2, 3 compared to the DC after 14 days of treatment, and the efficacy in reducing H2 S emissions in the CT1, 2, 3 was not different. After 28 days, the amount of H2 S emitted from chicken manure in the CT1, 2 and 3 redued 77.6%, 88.2% and 87.1%, respectively in comparison with the start time point of experiment.