滇中亚高山森林乔木层各器官生态化学计量特征

生态学杂志

滇中亚高山森林乔木层各器官生态化学计量特征

张雨鉴,宋娅丽,王克勤^*

(西南林业大学生态与水土保持学院，昆明 650224)

出版日期:2019-06-10 发布日期:2019-06-10

Ecological stoichiometry of various organs in the tree layer of subalpine forests in central Yunnan, China.

ZHANG Yu-jian, SONG Ya-li, WANG Ke-qin^*

(College of Ecology and Soil and Water Conservation, Southwest Forestry University, Kunming 650224, China).

Online:2019-06-10 Published:2019-06-10

摘要/Abstract

摘要： 探究森林乔木层各器官碳(C)、氮(N)、磷(P)生态化学计量特征，对掌握养分元素在森林群落优势层的分配格局及各器官养分受限状况等具有重要的作用。本文对滇中亚高山区域5种典型森林(云南松林、华山松林、常绿阔叶林、高山栎林、滇油杉林)乔木层各器官(叶、枝、干、皮、根)进行取样，分析其C、N、P含量及C/N、C/P和N/P化学计量特征，结果显示：不同林型乔木层除N含量差异不显著外，C、P含量及C/N、C/P和N/P均存在显著差异；5种林型乔木层叶、枝、干、皮和根的C含量分别为482.40～576.03、472.50～566.47、462.67～512.30、465.10～542.30、478.67～566.47 mg·g^-1，N含量分别为11.30～25.42、4.20～7.47、3.49～8.30、6.18～9.71、6.08～10.64 mg·g^-1，P含量分别为0.84～2.36、0.42～1.02、0.25～0.81、0.30～0.82、0.55～1.63 mg·g^-1，在不同器官间，C含量差异不大，N、P含量均为叶和根最高，其他器官相对较低，其中常绿阔叶林和高山栎林的C含量、C/N、C/P均呈干>枝>皮>根>叶，N含量均呈叶>根>皮>枝>干，而其余3种林型的C/P则呈干>皮>枝>根>叶的规律，P含量在5种林型各器官间规律均为叶>根>枝>皮>干；N/P值除了常绿阔叶林小于10外，其余4种森林类型均在10～20，说明常绿阔叶林乔木的生长主要受N元素的限制，而其余林型乔木则受到N、P两种元素共同限制；双因素方差分析结果表明，C含量、N/P主要受林型因素的影响，而N、P含量、C/N、C/P主要受器官因素的影响。

关键词: 信息可视化, 研究热点, 应用生态学, 文献计量, 演进轨迹

Abstract: Exploring ecological stoichiometry of carbon (C), nitrogen (N) and phosphorus (P) in tree layer of forest is of great importance to understanding nutrient allocation and limitation status in the dominant layer of forest community. Different organs (leaf, branch, trunk, bark, and root) of five typical forests (Pinus yunnanensis forest, Pinus armandii forest, evergreen broadleaf forest,Quercus semicarpifolia forest,Keteleeria evelyniana forest) were sampled in subalpine area of central Yunnan. The concentrations of C, N and P were measured and C∶N∶P stoichiometry were analyzed. The results showed that the ranges of C concentrations in the leaves, branches, trunks, barks and roots of five forest types were 482.40-576.03, 472.50-566.47, 462.67-512.30, 465.10-542.30, 478.67-566.47 mg·g^-1, N concentrations 11.30-25.42, 4.20-7.47, 3.49-8.30, 6.18-9.71, 6.08-10.64 mg·g^-1, and P concentrations 0.84-2.36, 0.42-1.02, 0.25-0.81, 0.30-0.82, 0.55-1.63 mg·g^-1, respectively. The difference of C concentrations was not different among organs. The concentrations of N and P in leaf and root were higher than other organs. The C concentration, C/N, and C/P in the evergreen broad-leaved forest and Q. aquifolioides forest were ranked as: trunks > roots > leaves > branches > barks, the N concentration presented in the order of leaves > roots > barks > branches>trunks, while the C/P of the other three forest types were ranked as: trunks > barks > branches > roots > leaves. The P concentration in the organs of the five forest types followed the order of leaves>roots>branches>barks>trunks. The N/P in the four types of forests were between 10 and 20, and that in the evergreen broad-leaved forest was less than 10, indicating that the growth of the evergreen broadleaved forest was mainly limited by N and the other forest types were colimited by N and P. The results of twoway ANOVAs showed that the C concentration and N/P varied among forest types, while the N and P concentrations, C/N and C/P varied among organs.

Key words: information visualization, applied ecology, research hotspots, bibliometrics, evolution

张雨鉴,宋娅丽,王克勤. 滇中亚高山森林乔木层各器官生态化学计量特征[J]. 生态学杂志.

ZHANG Yu-jian, SONG Ya-li, WANG Ke-qin. Ecological stoichiometry of various organs in the tree layer of subalpine forests in central Yunnan, China.[J]. cje.

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