|陕西省森林群落乔灌草叶片和凋落物 C、N、P 生态化学计量特征|
|姜沛沛1; 曹扬2,3; 陈云明2,3
研究陕西省121 个森林群落中乔叶、灌叶、草叶和凋落物4 个层次的C、N、P 化学计
量学特征及其变异性，分析了各层次间及其与地理因子间的关系． 结果表明: 乔叶C、N 含量
最高，草叶P 含量最高，凋落物C、N、P 含量均最低． 乔叶、灌叶、草叶和凋落物的C∶ N∶ P 分
别为439． 4∶ 14． 2∶ 1、599． 2∶ 13． 5∶ 1、416． 5∶ 13． 3∶ 1、504． 8∶ 15． 5∶ 1，乔叶、灌叶、草叶
N∶ P 值差异不显著，但均与凋落物N∶ P 值差异显著，表明不同生活型活体植物叶片的N∶ P
值具有一定的稳定性． 与N 含量相比，C 和P 含量在各层次间表现出更好的相关性; C、N、P 含
叶之间C、N、P 含量均表现出显著正相关，与灌叶只在P 含量之间存在显著正相关． 灌叶N、P
含量随纬度增加而增加，草叶N、P 含量随经度增加而降低，海拔对叶片和凋落物C、N、P 含量
及其比值的影响较小，只有乔叶N∶ P 与海拔之间存在显著负相关． 各地理因子对草叶的影响
大小表现为经度＞ 纬度＞ 海拔，对乔叶、灌叶和凋落物的影响大小表现为纬度＞ 经度＞ 海拔．
A total of 121 sampling sites were selected to study the C，N，P stoichiometric characteristics
among the leaves of tree，shrub，herb and the litter of the majority forest community of
Shaanxi Province，China． We also studied their relationships with geographical factors． The results
showed that C，N concentrations were highest in tree leaf，P concentration was highest in herb leaf，
and the C，N，P concentrations were lowest in litter． Leaf C: N: P ratios of tree，shrub，herb leaves
and litter were 439． 4: 14． 2: 1，599． 2: 13． 5: 1，416． 5: 13． 3: 1，504． 8: 15． 5: 1，respectively． The
N: P ratios of tree，shrub and herb leaves were not significantly different，but they were all significantly
higher than that of litter layer，indicating N: P ratio of different living life forms’leaves was
stable． Compared with N，C and P had better relationships in each layer，and the relationships of
leaf C，N，P stoichiometry between tree and herb leaves were better than those between tree and
shrub leaves． The correlations of C，N，P stoichiometry between litter and the tree or herb leaves
were highly significantly positive，and the correlations of P stoichiometry between litter and shrub
leaves were highly significantly positive． Shrub leaf N，P concentration increased with the increasing
latitude，and herb leaf N，P concentrations decreased with the increasing longitude． Comparedwith the longitude and latitude，the effect of altitude was smaller，and only tree leaf N: P decreased
with the increasing latitude． Multivariate linear regression analysis results showed that the influence
of geographical factors on herb leaf was longitude ＞ latitude ＞ altitude，while was latitude ＞ longitude
＞ altitude for tree，shrub leaves and litter．
姜沛沛,曹扬,陈云明. 陕西省森林群落乔灌草叶片和凋落物 C、N、P 生态化学计量特征[J]. 应用生态学报,2016,27(2):365-372.
姜沛沛,曹扬,&陈云明.(2016).陕西省森林群落乔灌草叶片和凋落物 C、N、P 生态化学计量特征.应用生态学报,27(2),365-372.
姜沛沛,et al."陕西省森林群落乔灌草叶片和凋落物 C、N、P 生态化学计量特征".应用生态学报 27.2(2016):365-372.
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