摘要
ＥｆｆｅｃｔｓｏｆＮｉｔｒｏｇｅｎＦｅｒｔｉｌｉｚｅｒ，ＳｏｉｌＭｏｉｓｔｕｒｅａｎｄＴｅｍｐｅｒａｔｕｒｅｏｎＭｅｔｈａｎｅＯｘｉｄａｔｉｏｎｉｎＰａｄｄｙＳｏｉｌＹＡＮＸＩＡＯＹＵＡＮａｎｄＣＡＩＺＵＣＯＮＧ（ＬＭＣＰ，ＩｎｓｔｉｔｕｔｅｏｆＳｏ...
Effects of nitrogen fertilizer,soil moisture and temperature on methane oxidation in paddy soil were investigated under laboratory conditions. Addition of 0.05 g N kg-1 soil as NH4Cl strongly inhibited methane oxidation and addition of the same rate of KCl also inhibited the oxidation but with more slight effect,suggesting that the inhibitory effect was partly caused by increase in osmotic potential in microorganism cell.Not only NH but also NO greatly affected methane oxidation.Urea did not affect methane oxidation in paddy soil in the first two days of incubation,but strong inhibitory effect was observed afterwards.Methane was oxidized in the treated soil with an optimum moisture of 280 g kg-1, and air-drying inhibited methane oxidation entirely.The optimum temperature of methane oxidation was about 30℃in paddy soil,while no methane oxidation was observed at 5℃or 50℃
关键词
氮肥
土壤湿度
温度
水稻土
甲烷氧化
温室气体
methane oxidation,nitrogen fertilizer,paddy soil,soil moisture,temperature
