林龄和立地条件对北京山区油松人工林碳储量的影响  

Effects of Stand Ages and Site Conditions on Carbon Stock of Pinus tabuliformis Plantations in Beijing Mountainous Area

作　　者：黄晓强[1] 信忠保[1] 赵云杰[1] 马凤原 

机构地区：[1]北京林业大学水土保持学院,水土保持与荒漠化防治教育部重点实验室,北京100083 [2]密云县园林绿化局,北京101500

出　　处：《水土保持学报》2015年第6期184-190,共7页Journal of Soil and Water Conservation

基　　金：北京高等学校“青年英才计划”项目(YETP0753);中央高校基本科研业务费专项资金项目(TD2011-2)

摘　　要：以北京密云红门川流域典型造林树种油松为研究对象,运用林木相对生长方程和全收获法,研究了不同林龄油松人工林生态系统碳储量及其对影响因素的响应。结果表明:(1)油松林植被碳储量随着林龄的增大呈显著增长趋势,57a油松林植被碳储量较35a增加了90.28%,各林龄均较灌丛(4.48±0.23t/hm^2)增加显著。(2)北京山区35a和40a油松林土壤有机碳储量较灌丛并无明显增加,甚至略有下降,而57a油松林较灌丛土壤有机碳增加了61.66%,可见,造林固碳是一个漫长的过程。(3)油松林生态系统碳储量随着林龄的增大呈增加的趋势,35a和40a油松林生态系统碳储量分别为(73.84±5.61)t/hm^2和(84.52±14.79)t/hm^2,分别较灌丛[(64.67±12.23)t/hm^2]增加了19.72%和30.94%。而57a油松林生态系统碳储量进一步增加至(141.50±3.42)t/hm2,较灌丛增加了118.80%。油松林生态系统碳储量空间分配格局表现为土壤层(57.70%)>植被层(32.36%)>枯落物层(9.94%)。(4)油松林生态系统碳储量主要受林龄和土壤质地影响,两者共解释有机碳储量变化的65.6%。其中,土壤储量变化可被林龄和土壤质地解释75.9%,而植被碳储量主要与林龄有关。This study regarded the chronosequence of Pinus tabuliformis plantations,which located at the Hongmengchuan catchment in the northeast of Miyun county,as the research object to analyze the organic carbon stock for Pinus tabuliformis plantation ecosystem with different stand ages and the factors that influence carbon sequestration in the typical forest type in the Beijing mountainous area,by using trees relative growth model,as well as the whole harvest method.The results showed that：（1）The vegetable carbon stock increased with the increasing stand age.Compared with 35-year-old Pinus tabuliformis forest,vegetable carbon stock of 57-year-old forest increased by 90.28%,and vegetable carbon stocks of Pinus tabuliformis forests with different stand ages were significantly higher than that of shrub（4.48±0.23t/hm^2）.（2）Compared with shrub,soil organic carbon stocks of 35-year-old and 40-year-old Pinus tabuliformis forest did not increase,and even showed a slight decline,and soil organic carbon stock of 57-year-old Pinus tabuliformis forest increased by 61.66%.Therefore,carbon sequestration of plantation has been a long process.（3）The carbon stock of Pinus tabuliformis forest ecosystem increased with the increasing stand age,which were（73.84±5.61）and（84.52±14.79）t/hm^2 in 35-year-old and 40-year-old stands,respectively,and increased by 19.72% and 30.94%,respectively,compared to that of the natural shrub（64.67±12.23t/hm2）.The carbon stock in the 57-year-old Pinus tabuliformis forest ecosystem reached up to（141.5±3.42）t/hm^2,which increased by 118.80% compared to that of the natural shrub.The average carbon storage in different components of forest ecosystem followed the order of soil layer（57.70%）vegetation layer（32.36%）litter layer（9.94%）.（4）The carbon stock of Pinus tabuliformis forest ecosystem wasmainly affected by stand age and soil texture,which jointly explained 65.6% of organic carbon storage variability.Among them,soil carbon stock was also affected by stand

关 键 词：山区 人工林 油松 有机碳 林龄 

分 类 号：S718.55[农业科学—林学] S791.254