妊娠猪舍氨气及氧化亚氮浓度测定与排放通量的估算

Measurement of ammonia and nitrous oxide concentrations and estimation of the emission rates from gestation pig buildings

在北京选择一典型猪场,对不同季节妊娠舍的氨气及氧化亚氮浓度进行了为期1年的试验测定,并根据二氧化碳平衡原理,对猪场不同生长阶段的妊娠猪含氮气体的排放通量进行了估算。结果表明:冬季2004年11月氨气和氧化亚氮的平均浓度分别为(11．64±4．36),(1．17±0．2)mg／m^3,夏季7月舍内氨气和氧化亚氮的平均浓度分别为(3．31±2．67),(0．6±0．02)mg／m^3;妊娠猪饲养期间的氨气排放通量为每头(185．2～500．8)mg／h,氧化亚氮为(3．85～35．93)mg／h。

Measurements of ammonia and nitrous oxide concentrations were conducted from gestation pig buildings in Beijing for one year from 2004 to 2005.The NH_3 and N_2O emission flux per pig was estimated based on venti- lation rates which were calculated by application of carbon dioxide mass balance method.The NH_3and N_2O con- centration and emission flux varied seasonally.Mean NH_3and N_2O concentration values were(11.64±4.36)and (1.17±0.2)mg/m^3 in November,(3.31±2.67)and(0.6±0.02)mg/m^3 in July,and NH_3and N_2O emission rate from pig building varied from 107.18 to 424.42 mg/h,and 3.85 to 35.93 mg/h per animal,respectively.