不同林龄人促更新林枯枝落叶层碳及养分贮量  

Carbon and Nutrient Pools in Forest Floor of Artificially Assisted Regeneration Forests with Different Ages

作　　者：王小红[1,2] 张金凤[1,2] 林开淼[1,2] 卢正立[1,2] 曾宏达[1,2] 郭剑芬[1,2] 

机构地区：[1]福建师范大学地理科学学院,福州350007 [2]湿润亚热带山地生态国家重点实验室培育基地,福州350007

出　　处：《亚热带资源与环境学报》2015年第1期56-61,共6页Journal of Subtropical Resources and Environment

基　　金：福建省科技厅公益类重点项目(K3-295);国家自然科学基金重点项目(31130013);福建省自然科学基金(2012J05052)

摘　　要：对福建南平顺昌县不同林龄米槠（Castanopsis carlesii）人促更新林枯枝落叶层和主要营养元素现存量进行测定,探究其随林龄的变化趋势。结果表明：不同林龄米槠人促更新林枯枝落叶层现存量为3.94～4.95 t·hm-2,其中49 a生人促林枯枝落叶层现存量最小,31 a生的最大。不同林龄枯枝落叶层C、N、P、K的浓度分别为44.09%～47.46%,11.9～13.8 g·kg-1,0.5～0.9 g·kg-1,1.4～5.1 g·kg-1。21 a生和49 a生人促更新林枯枝落叶层C浓度明显高于31 a生林分。49 a生人促更新林枯枝落叶层N和P浓度均高于21 a生和31 a生林分,但该林分枯枝落叶层K浓度却最低。21 a生米槠人促更新林枯枝落叶层C贮量分别是31 a生和49 a生林分的1.03倍和1.23倍,49 a生米槠人促更新林K贮量远低于21 a生和31 a生。不同林龄枯枝落叶层碳和养分贮量差异与林分特征、各林分枯枝落叶层现存量及养分浓度等有关。Carbon（ C） and nutrient stocks of forest floor were studied in artificial regeneration Castanopsis carlesii forests with stand ages of 21,31 and 49-year old in Shunchang,Fujian. The results showed that the standing crop of forest floor ranged from 3. 94 to 4. 95 t ·hm- 2,with the maximum mass in the 31-year old forest and the minimum in the 49-year old forest. Concentrations of C,N,P and K were 44. 09% ～ 47. 46%,11. 9 ～ 13. 8 g·kg- 1,0. 5 ～0. 9 g·kg- 1and 1. 4 ～ 5. 1 g·kg- 1,respectively. C concentrations of forest floor in 21- and 49-year old forests were significantly higher than those in 31-year old forest,while concentrations of N and P in forest floor of 49-year old forest were higher than those in the 21- and 31-year old forests. Also,forest floor in the 49-year old forest had the lowest K concentration. Forest floor C stock in the 21-year old forest was 1. 03 and 1. 23 times higherthan those in the 31- and 49-year old forests,respectively. The K stock in 49-year old forest was far below it in 21- and 31-year old forests. Overall,carbon and nutrient pools of forest floor in different forests were related to forest characteristics,standing crop of forest floor,etc.

关 键 词：米槠人促更新林 枯枝落叶层 现存量 养分 

分 类 号：X37[环境科学与工程—环境工程]