若尔盖高原沼泽湿地N2O排放通量研究

应用静态箱/气相色谱法,测定了若尔盖高原沼泽N₂O排放能量,测定期为该地植物生长期,即2004年4月末至10月初。结果表明,若尔盖高原沼泽湿地N₂O排放通量平均值为0.010mg·m^-2h^-1,最大值为0.079mg·m^-2h^-1,最小值为-0.051mg·m^-2h^-1。高峰排放期为5月,最低排放期为地表水深最大的6月。沼泽湿地N₂O排放通量季节变化与沼泽湿地水深呈负相关关系。沼泽湿地N₂O排放通量日变化与大气温度呈正相关关系,排放高值出现在午后。若尔盖高原沼泽湿地在植物生长期的年排放总量约为0.159Gg·a^-1。

N2O flux from the mire in Ruoergai Plateau

Ruoergai plateau mire is the largest distribution area of plateau peat mire in China.From the end of April to early October of 2004, the N₂O flux was measured with the closed chamber/GC technique in Ruoergai plateau mire.The mean value of N₂O flux was 0.010 mg·m^-2h^-1, the max value was 0.079 mg·m^-2h^-1, and the minimum was -0.051 mg·m^-2h^-1 from the mire.Seasonal change of N₂O flux was negatively correlated with water depth in mire.Diurnal N₂O flux was positively correlated with air temperature and peak value was found in the afternoon.In the plant growing season, total quantity of N₂O emission from mire was about 0.159·a^-1 in Rouergai plateau.