【摘要】 利用国际森林土壤温室气体采集、分析最普遍的方法——静态箱法和气相色谱法,对石溪林场杉木林土壤主要温室气体的排放和吸收通量进行了研究.探讨氮磷添加后土壤主要温室气体的响应规律,以及对森林温室气体通量的影响.研究表明,高氮及高氮加磷对提高地表N2O的排放量有统计学意义(p<0.01);低氮及低氮加磷也提高了地表N2O的排放量,但是不具有统计学意义.施肥对地表N2O的排放量的影响主要表现在施肥初期,施肥后一周内,添加氮肥会导致N2O的排放量出现一个明显的峰值.随着时间的推移,N2O的排放量明显下降,直到与对照样地的差异不具有统计学意义.更多还原

【Abstract】 Using the most common method for sampling and analyzing gas sample,the static chamber-gas chromatography method,we studied the greenhouse gas fluxes of the fir forest soil,exploring the response pattern of the major greenhouse gases of nitrogen and phosphorus addition and the mechanism of greenhouse gas fluxes of fir forest soil at Shixi forest.This experiment shows high nitrogen and high nitrogen and phosphorus significantly improved surface N2 O emissions(p<0.01).low nitrogen and low nitrogen plus phosphorus increased surface N2 O emissions,but did not reach the level of significance.The effect of fertilization on the N2 O emissions was mainly observed in the early stages of fertilization,within a week after fertilization,nitrogen fertilization will lead to an obvious peak of N2 O,and as time goes on,N2 O emissions decreased until there was no significant difference compared with the blank.更多还原