翅荚木同龄林林木叶片性状与胸径生长关系

doi:10.11707/j.1001-7488.20200519

Abstract

Abstract:

Objective: The tree diameter at breast height (DBH) is an important measurement factor in forest survey and forest management evaluation. In this study,the main leaf functional traits of different diameter classes in even-aged stands of Zenia insignis were determined in order to illuminate the relationship between the leaf functional traits and the diameter growth,which aims to provide theoretical basis for selection of excellent germplasm resources and precision nutrient management of Z. insignis. Methods: Principal component analysis (PCA) was used to determine the main leaf functional traits affecting the DBH growth of the even-aged stand of Z. insignis. Results: Firstly,individual leaf area (ILA),specific leaf area (SLA),leaf relative water content (LRWC),leaf carbon content (LCC),leaf nitrogen content (LNC),leaf phosphorus content (LPC),leaf C:N ratio (C/N),leaf C:P ratio(C/P),leaf N:P ratio(N/P),leaf nitrogen content based on area (N_area),and leaf area phosphorus content based on area (P_area) differed significantly among different diameter classes. Secondly,leaf structural traits,such as ILA and LRWC,and leaf functional traits,such as P_area,C/P,LPC and N/P,had important impact on the DBH growth. ILA and P_area showed a significant linear positive correlation with the diameter growth (P < 0.01). LRWC and leaf N/P showed a significant linear negative correlation with the DBH growth (P < 0.01). There was a quadratic parabola relationship between leaf C/P and DBH growth,showing increase after slightly decrease (P < 0.01). Whereas there was a quadratic parabola relationship between LPC and the DBH growth,showing decrease after slightly increase (P < 0.05). Thirdly,the correlations between SLA,N_area,LCC,LNC and C/N were not significantly correlated with the DBH growth. Conclusion: Leaf structural and functional traits have important effects on the DBH growth of Z. insignis. ILA in structural traits as well as LPC and P_area in functional traits are the most important influencing factors.

Key words: leaf structural and functional traits, diameter growth, principal component analysis, correlations, Zenia insignis

CLC Number:

S154.5

Xue Zhang,Quanlin Zhong,Baoyin Li,Xiangming Yao,Chaobin Xu,Dongliang Cheng,Yuefang Zheng,Hua Yu. Relationship between the Leaf Functional Traits and the Diameter Growth in Even-Aged Stands of Zenia insignis[J]. Scientia Silvae Sinicae, 2020, 56(5): 168-175.

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径阶Diameter class	8	10	12	14	16
叶结构型性状指标 Leaf structural traits
单叶面积ILA/cm²	502.25±22.90c	566.92±30.37c	733.43±73.36b	848.95±45.33a	883.05±20.55a
比叶面积SLA/(cm²·g^-1)	369.56±20.14ab	393.88±46.93ab	426.68±24.99a	333.46±50.96b	338.49±50.81b
叶相对含水率LRWC(%)	96.38±1.03a	76.35±3.61b	75.60±0.41b	75.47±0.84b	73.37±1.15b
叶功能型性状指标 Leaf functional traits
叶片碳含量LCC/(mg·g^-1)	429.09±0.92b	429.14±1.78b	436.65±5.46a	437.80±0.33a	424.57±0.79b
叶片氮含量LNC/(mg·g^-1)	24.52±0.50ab	24.53±0.87ab	27.57±3.04a	27.17±1.67a	22.92±0.49b
叶片磷含量LPC/(mg·g^-1)	1.10±0.01c	1.18±0.05b	1.41±0.05a	1.36±0.05a	1.24±0.04b
C/N	17.51±0.32ab	17.51±0.56ab	15.96±1.67b	16.15±0.96b	18.53±0.37a
C/P	390.10±2.74a	363.12±16.68ab	309.82±6.51b	321.38±11.08b	342.58±9.44b
N/P	22.29±0.27a	20.77±1.53ab	19.52±1.59b	19.92±0.73b	18.49±0.15b
单位叶面积氮含量 N_area/(mg·cm^-2)	0.066±0.002a	0.063±0.006a	0.065±0.010a	0.082±0.008b	0.068±0.002a
单位叶面积磷含量 P_area/(mg·cm^-2)	0.0030±0.0001a	0.0030±0.0005a	0.0033±0.0003a	0.0041±0.0005b	0.0037±0.0002ab

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Relationship between the Leaf Functional Traits and the Diameter Growth in Even-Aged Stands of Zenia insignis

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