马尾松凋落物C∶N∶P化学计量特征对分解速率的影响  

Influence of C ∶ N ∶ P stoichiometry for decomposition rate in Pinus massoniana litterfall

作　　者：何丹[1,2] 李栎[1,2] 周国新[1,2] 杜昕[1,2] 潘高[1,2] 

机构地区：[1]中南林业科技大学,湖南长沙410004 [2]南方林业生态应用技术国家工程实验室,湖南长沙410004

出　　处：《湖南林业科技》2015年第3期24-27,共4页Hunan Forestry Science & Technology

基　　金：湖南省研究生科研创新课题项目(CX2013B355)

摘　　要：以湖南省森林植物园马尾松林为研究对象,对马尾松凋落物的C、N、P含量及其化学计量特征对分解速率的影响进行研究。经过1年的分解试验,结果表明:马尾松凋落叶的C、N、P含量及C∶N、C∶P、N∶P均高于凋落枝的;凋落枝、凋落叶的分解速率分别为0.709 g/(g·年)和0.756 g/(g·年),凋落枝的分解速率也低于凋落叶的;凋落枝、叶的分解速率与C∶N∶P生态化学计量呈正相关关系。凋落枝的P含量以及C∶N、C∶P、N∶P与凋落叶的差异显著;凋落叶的C含量与凋落枝的C含量呈极显著正相关。With Pinus massoniana forest of Hunan Forest Botanical Garden as study object,the effect of litter fall organ-ic C,total N,total P content and its seasonal variations stoichiometry on decomposition rate was studied.The results showed that,after a year of decomposition experiment,C,N,P content and C ∶N,C ∶P,N ∶P of Pinus massoniana litter leaf were higher than that of litter branch,the decomposition rate of branch and leaf were 0.709 g/(g·a)and 0.756 g/(g·a)respectively,and the decomposition rate of litter leaf was higher than that of litter branch in different time.There was positive relationship between the decomposition rate of litter branch and leaf and C ∶N ∶P ecological stoi-chiometry.P content and C ∶N,C ∶P,N ∶P of litter branch compared to litter leaf were significant differences.There was a significant positive correlation between C content of litter leaf and C content of litter branch.

关 键 词：马尾松 凋落物 生态化学计量特征 分解速率 

分 类 号：S153.621[农业科学—土壤学]