摘要
[目的]研究火烧对华山松、柏木凋落物及其表层（0～10 cm）土壤碳氮的影响.[方法]采用相邻样地比较法以空间代替时间,对昆明近郊火烧林地调查采样并分析.[结果]与未过火华山松相比,过火华山松表土有机碳、全氮含量及碳、氮储量均下降,且差异显著,柏木相应的指标也降低,但差异不显著;华山松、柏木凋落物现存量分别减少49.04％、41.03％,凋落物现存量和表土有机碳、全氮含量及其碳、氮储量均正相关.[结论]火烧使两种林型凋落物和表土碳、氮含量及储量降低,但柏木林受火烧的影响较华山松林小,柏木林抗火性能及其在火烧后的恢复比华山松林更具优势.
[Objective] The objective of the study was to investigate impact of fire on carbon and nitrogen contents of litter and topsoil （0--10 cm） in P. armandii and C. torulosa. [Method] The adjacent plots （burned and non-burned） was selected and the litter and soil samples were collected from the burned and non-burned plots. [Results] The carbon and nitrogen contents in litter and topsoil were decreased significantly by fire in P. armandii but fire did not affect the measured in- dicators in P. armandii. Litter pools were reduced by 49.04~ and 41.03~, respectively, in P. armandii and C. torulosa. Litter pools were correlated positively with carbon and nitrogen and their reserves. [Conclusion] Forest fire reduced carbon and nitrogen contents of litter and topsoil in both forests and P. armandi was more sensitive to fire disturbance compared to C. torulosa. Therefore, C. torulosa could be more fire-resistant and easier to be restored relative to P. armandii.
出处
《四川农业大学学报》
CSCD
北大核心
2014年第1期18-22,共5页
Journal of Sichuan Agricultural University
基金
西南林业大学水土保持与荒漠化防治重点学科(XKX200905)
关键词
林火
有机碳
全氮
凋落物
forest fire
organic carbon
total nitrogen
litter
