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不同林龄油松( Pinus tabulaeformis) 人工林植物、凋落 物与土壤C、N、P 化学计量特征
姜沛沛1; 曹扬2,3; 陈云明2,3; 王芳4
2016
Source Publication生态学报
Volume36Issue:19Pages:6188-6197
Abstract

在陕西省北部延安市境内子午岭林区,采用时空互代的方法选取9、23、33、47 年生油松( Pinus tabuliformis) 人工林为研究
对象,比较油松不同器官( 叶、枝、干、根) 、凋落物及土壤C、N、P 含量及其比值的差异,探讨它们随林龄的变化及其相互间的
关系,以期为油松人工林的生产、改善和林木生长环境的调节提供参考。结果表明: 除根中C 含量在林龄间差异不显著外,其
它器官C、N、P 含量及其比值在林龄间均差异显著且随林龄增加变化趋势不尽相同。9、23、33、47 年生油松林C、N、P 含量及
N ∶P比值均在叶中最高; C ∶N 比值均在干中最高,根中次之; C ∶P 比值均在干中最高,其它器官大小次序不一。除33 年生油松
林叶中N ∶P 比值大于14 外,其它各器官各林龄N ∶P 比值均小于14,且N ∶P 比值随林龄先增加后减少,故可判断油松在该区
域受N 限制较为严重,且随林龄的增加受N 限制的情况有所缓解。不同林龄土壤和凋落物C、N、P 含量及其比值差异显著,
且后者均大于前者。土壤与凋落物C、P 含量及C ∶N、C ∶P、N ∶P 比值随林龄增加变化趋势完全一致,表明土壤与凋落物之间有
着密切的关系。叶片与凋落物N、P 含量及C ∶N、C ∶P、N ∶P 比值之间显著相关,表明凋落物的养分承自植物叶片,二者之间关
系紧密; 植物和土壤的C、N、P 含量之间均不存在显著相关性,说明土壤C、N、P 供应量对乔木叶片C、N 、P 含量影响不大。

Other Abstract

To estimate the ecological stoichiometry of Pinus tabulaeformis at different plantation stand ages,we investigated
P. tabulaeformis plantations of 9,23,33,and 47 years old in the Ziwuling of Shaanxi province. This research of ecological
stoichiometry was studied in order to guide the P. tabulaeformis forest productivity,and to improve and adjust the growthenvironment of such plantations. To this end,we investigated the carbon ( C) ,nitrogen ( N) ,and phosphorus ( P )
concentration,as well as their ratios in plant organs ( leaf,branch,stem,and root ) ,litter,and soil during stand
development. Apart from root C concentration,the C,N,and P concentrations of the different plant organs,as well as their
ratios,were significantly different in all plantation age groups. For all four age groups of P. tabulaeformis plantations,the
C,N,and P concentrations,as well as the N ∶P ratios were highest in the leaf tissue,whereas the C ∶N and C ∶P ratios
were highest in the stems. For other plant organs,no consistent patterns were found. For all plantation ages,all plant organ
N ∶P ratios were lower than 14,except for leaf tissue from the 33-year-old P. tabulaeformis forest stand. Overall,the N ∶P
ratios first increased,and then decreased with increasing forest age. These results imply that in this region,P. tabulaeformis
is limited by N,and this N limitation decreases with increasing forest age. The litter and soil C,N,and P concentrations,
as well as their ratios,were significantly different among the plantation age groups,with litter having higher concentrations
than soil. Soil and litter C and P concentrations,as well as their C ∶N,C ∶P,and N ∶P ratios changed similarly with the
increasing forest age, indicating a close relationships between soil and litter stoichiometry. There were significant
correlations between the leaf tissue and litter N and P concentrations,as well as between their C ∶N,C ∶P,and N ∶P ratios.
However,no significant correlations between the leaf tissue and soil C,N,and P concentrations were found,suggesting
that the supply of C,N,and P from the soil had little influence on plant tissue C,N,and P concentrations.

Keyword油松人工林 林龄 凋落物 土壤 c ∶n ∶p 生态化学计量
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8534
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学林学院
2.西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室
3.中国科学院水利部水土保持研究所
4.西北农林科技大学水土保持研究所
Recommended Citation
GB/T 7714
姜沛沛,曹扬,陈云明,等. 不同林龄油松( Pinus tabulaeformis) 人工林植物、凋落 物与土壤C、N、P 化学计量特征[J]. 生态学报,2016,36(19):6188-6197.
APA 姜沛沛,曹扬,陈云明,&王芳.(2016).不同林龄油松( Pinus tabulaeformis) 人工林植物、凋落 物与土壤C、N、P 化学计量特征.生态学报,36(19),6188-6197.
MLA 姜沛沛,et al."不同林龄油松( Pinus tabulaeformis) 人工林植物、凋落 物与土壤C、N、P 化学计量特征".生态学报 36.19(2016):6188-6197.
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