论文部分内容阅读
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.
The main greenhouse gas emission and absorption flux of Cunninghamia lanceolata plantations in Shixiu Forest Farm were studied by static box method and gas chromatography, which are the most common method of collecting and analyzing international forest soil greenhouse gases. The response of greenhouse gases and the impact on forest greenhouse gas flux were studied.The results showed that high nitrogen and high nitrogen phosphorus increased the surface N2O emission (p <0.01) But also did not increase the surface N2O emissions, but not statistically significant.The effect of fertilization on surface N2O emission was mainly in the early stage of fertilization. Adding nitrogen fertilizer within a week after fertilization resulted in a significant peak of N2O emission. With the passage of time, N2O emissions decreased significantly, until the difference with the control plots was not statistically significant.