丝兰提取物对鸡粪储存碳氮养分与氨气和温室气体排放的影响OA

Liquid manure storage represents a critical stage in manure management for mitigating greenhouse gas and ammonia emissions while preserving nutrient value.In China,substantial poultry production(173.4 billion birds slaughtered in 2024)generates massive manure,necessitating effective storage-phase mitigation strategies.This study specifically evaluated the effects of Yucca schidigera extract(YSE)on carbon/nitrogen dynamics and gas emissions during 30-day static storage of liquid chicken manure and compared YSE with a commercial biological deodorant.The experiment was conducted with three treatments:T0(blank control),T1(0.5％YSE),and T2(0.1％biological deodorant).Manure temperature and ambient conditions were monitored twice daily.Physicochemical properties-pH,electrical conductivity(EC),moisture content(MC),nitrate nitrogen(NO3--N),ammonium nitrogen(NH4+-N),total nitrogen(TN),organic matter(OM),and C/N ratio—were analyzed on days 0,9,19,and 30 by grid sampling(12 locations per container).The results demonstrated gradual pH increases and MC decreases across all treatments.EC showed different trends in different treatments,decreasing over time in T0 and first increasing and then decreasing in T1 and T2.At the same time point,T1 and T2 had lower EC than T0(P＜0.05).T1 and T2 had the TN 21.41％and 16.14％higher than T0,respectively,on day 30(P＜0.05).Similarly,the OM in T1 was 7.28％higher than that in T0 at termination.Regarding gas emissions,cumulative NH3 emissions were reduced by 21.60％in T1 and 19.88％in T2 compared with that in T0(P＜0.05).Furthermore,T1 showed a 9.59％reduction in cumulative CO2 emissions compared with T0.No significant differences were observed in cumulative CH4 or N2O emissions among treatments.Correlation analysis revealed cumulative NH3 emissions were positively correlated with NO3--N(P＜0.01)and NH4+-N(P＜0.01),and negatively correlated with TN(P＜0.01)and OM(P＜0.001).Cumulative CO2 emissions showed positive correlations with EC(P＜0.05)and NO3--N(P＜0.05)and a strong negative correlation with OM(P＜0.01).In conclusion,adding 0.5％YSE effectively mitigated NH3 emissions and nitrogen loss while enhancing OM preservation during static storage of liquid chicken manure.Its efficacy in NH3 reduction was comparable to a commercial biological deodorant.This study provides a practical,natural additive-based strategy for reducing environmental impact and conserving nutrient value in liquid poultry manure storage systems.