武夷山甜槠群落林下植被不同器官C、N、P化学计量特征  

Carbon,Nitrogen and Phosphorus Stoichiometric Characteristics of Different Organs in Understory Vegetation of Castanopsis eyrei Community in Wuyi Mountain

作　　者：黄雍容[1] 高伟[1] 林捷[1] 黄石德[1] Huang Yongrong;Gao Wei;Lin Jie;Huang Shide(Fujian Academy of Forestry,Fujian Provincial Key Laboratory of Silviculture and Forest Product Processing and Utilization,350012 Fuzhou)

机构地区：[1]福建省林业科学研究院,福建省森林培育与林产品加工利用重点实验室,福建福州350012

出　　处：《防护林科技》2022年第3期21-23,共3页Protection Forest Science and Technology

基　　金：福建省自然科学基金项目(2016J01116);福建省林业科研项目(闽林科〔2016〕3号);福建省公益类项目(2018R1011-7)。

摘　　要：以武夷山甜槠(Castanopsis eyrei)群落林下植被为研究对象,对灌木层和草本层优势植物各器官C、N、P含量进行测定,对其生态化学计量特征及其养分利用策略进行了研究。结果表明:灌木层优势植物C含量显著高于草本层;草本层植被N含量略大于灌木层,但差异不显著;灌木层和草本层植被P含量无显著差异。灌木层优势植物干器官C含量显著高于其他器官,叶和根的N含量显著高于干和枝,叶的P含量显著高于其他器官。草本层优势植物地上部分的C、N、P含量均高于地下部分。该群落灌木层大部分优势植物的N、P利用效率较草本层高,灌木层和草本层植物生长受P元素限制。灌木层优势植物的干器官及草本层地下部分N、P利用效率较高。The paper studied the ecostoichiometric characteristics and nutrient utilization strategy of the understory vegetation of Castanopsis eyrei community in Wuyi Mountain by determined carbon(C),nitrogen(N),phosphorus(P)concentrations of different organs of the dominant plants in shrub layer and herb layer.The results show that(1)the C content of shrub layer was significantly higher than that of herb layer,yet the N content of herb layer was slightly bigger than that ofshrub layer,the P content between two layers was not obviously different,(2)the stem C content of dominant plants of shrub layer was significantly higher than that of other organs,the N contents of leave and root was significantly higher than that of stem and branch,and the P content of leave was significantly higher than that of other organs,(3)the upground part C,N and P contents of dominant plants of herb layer were all higher than those of the underground part,(4)based on stoichiometry,utilization efficiency of N and P of dominant plants in shrub layer were higher than those in herb layer,and plants growth in shrub layer and herb layer were restricted by P element.The utilization efficiency of N and P of stem for dominant plants in shrub layer were high,so were the underground part of herb layer.

关 键 词：武夷山 甜槠群落 灌木层 草本层 化学计量 

分 类 号：S718.55[农业科学—林学]