四川农业大学学报 ›› 2014, Vol. 32 ›› Issue (01): 18-22.doi: 10.3969/j.issn.1000-2650.2014.01.003

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林火对昆明人工林凋落物和表层土壤碳氮的影响

黄铄淇, 胡慧蓉, 韩钊龙, 李姗姗, 王鸿泉   

  1. 西南林业大学环境科学与工程学院, 昆明 650224
  • 收稿日期:2013-12-30 出版日期:2014-03-31 发布日期:2017-02-28
  • 通讯作者: 胡慧蓉,教授,研究方向:森林土壤生态,E-mail:hhrxl@163.com。 E-mail:hhrxl@163.com
  • 作者简介:黄铄淇,硕士研究生。
  • 基金资助:
    西南林业大学水土保持与荒漠化防治重点学科(XKX200905)

Effects of Fire on Carbon and Nitrogen Pools in Litter and Topsoil of Plantations, Kunming

HUANG Shuo-qi, HU Hui-rong, HAN Zhao-long, LI Shan-shan, WANG Hong-quan   

  1. College of Environmental Sciences and Engineering Southwest Forestry University, Kunming 650224, China
  • Received:2013-12-30 Online:2014-03-31 Published:2017-02-28

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。

关键词: 林火, 有机碳, 全氮, 凋落物

Abstract: [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 indicators 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. torulosacould be more fire-resistant and easier to be restored relative to P. armandii.

Key words: forest fire, organic carbon, total nitrogen, litter

中图分类号: 

  • S153