干旱区生态环境知识资源中心(Arid): 云南文山石漠化区车桑子叶脉密度与叶氮含量关系对生境的响应

Arid

	云南文山石漠化区车桑子叶脉密度与叶氮含量关系对生境的响应
其他题名	Relationship between vein density and leaf nitrogen concentration of Dodonaea viscose in response to habitat changes in rocky desertification area,Wenshan,Yunnan
	陈静; 庄立会; 沐建华; 周建松
来源期刊	生态学报
ISSN	1000-0933
出版年	2020
卷号	40 期号:11 页码:3706-3714
中文摘要	植物叶脉特征和叶氮含量的变化影响着叶片经济谱的形成,为验证叶片结构中叶脉网络构建提供了理论依据。该文以单位质量叶氮含量(N_(mass))和单位面积叶氮含量(N_(area))分别表示叶氮含量,采取主成分分析、线性回归分析的方法,研究了云南文山石漠化区旷地(I) 、林缘(II)和林下(III) 3种自然生境下车桑子的叶脉密度(Vein density,VD)与N_(mass)和N_(area)的异速关系。结果表明:从乔灌群落的旷地到林下,车桑子的比叶面积、叶绿素总含量、光能利用率和N_(mass)逐渐增大,光饱和点、光补偿点、水分利用效率、VD、N_(area)逐渐减小,净光合速率、蒸腾速率、气孔导度呈先增大后减小的趋势。VD与叶氮含量呈不同程度的相关性,在生境I和III,VD与N_(mass)和N_(area)分别具有显著的负相关(P<0.05)和正相关(P <0.05);在生境II,VD与N_(mass)和N_(area)分别呈不显著负相关(P>0.05)和正相关(P>0.05) 。车桑子在旷地强光生境,高VD的叶片含有低N_(mass)高N_(area),而林下荫蔽生境偏向于相反的配置模式,反映了石漠化区植物较强的叶脉可塑性及其与氮利用性状的权衡机制。
英文摘要	Changes of vein traits and leaf nitrogen concentration of plant affect the formation of leaf economic spectrum,which provides a theoretical basis for verifying the construction of leaf vein network function in leaf structure.The massbased nitrogen content(N_(mass)) and area-based nitrogen content(N_(area)) were used as leaf nitrogen concentration in this study.Principal component analysis and linear regressions were used to determine the relationships of vein density with leaf nitrogen concentration of Dodonaea viscose in three natural habitats.The study area was located in the rocky desertification area in Dongshan Township,Wenshan City,Yunnan(23°54'N,104°58'E) .According to the light condition of forest community,D.viscosa population was divided into 3 microenvironments including open areas of forest(I),forest edge(II),and forest understory(III) .We sampled 10(10 m *10 m) D.viscose plots from each microenvironment and investigated photosynthesis of the plants and environmental factors at three gradients.Three individuals of D.viscose were selected in each plot.The leaf area,leaf dry weight,chlorophyll content,vein density(VD),N_(mass) and N_(area) of 12 healthy leaves from 4 directions in each individual were measured at laboratory.The results indicated that specific leaf area,total chlorophyll content,light use efficiency,and N_(mass) of D.viscosa increased gradually along the gradient from I to III in arborshrub community,while the light saturation point,light compensation point,water use efficiency,VD,and N_(area) decreased gradually.The net photosynthetic rate(P_n),transpiration rate(T_r),stomatal conductance,and photosynthetic nitrogen use efficiency increased firstly and then decreased.There were varying correlations between VD and leaf nitrogen content.VD was significantly negatively correlated with N_(mass)(P<0.05),but had a significantly positive correlation with N_(area) in I and III(P < 0.05) .The correlation was not significant between VD both N_(mass) and N_(area) in II(P >0.05) .In the open areas of forest habitats,which were characterized by strong light intensity,D.viscosa had a higher VD,N_(area) and lower N_(mass) than those growing on forest edge and forest understory habitats.While the opposite patterns were seen in the shady habitats,reflecting the strong leaf vein plasticity of plants in rocky desertification areas and its balance mechanism with nitrogen utilization traits.
中文关键词	叶脉密度 ; 叶氮含量 ; 光照 ; 石漠化区 ; 车桑子
英文关键词	vein density leaf nitrogen concentration light condition rocky desertification area Dodonaea viscose
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Plant Sciences
CSCD记录号	CSCD:6739094
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353751
作者单位	陈静, 文山学院环境与资源学院, 文山, 云南 663099, 中国. 庄立会, 文山学院环境与资源学院, 文山, 云南 663099, 中国. 沐建华, 文山学院环境与资源学院, 文山, 云南 663099, 中国. 周建松, 文山学院环境与资源学院, 文山, 云南 663099, 中国.
推荐引用方式 GB/T 7714	陈静,庄立会,沐建华,等. 云南文山石漠化区车桑子叶脉密度与叶氮含量关系对生境的响应[J],2020,40(11):3706-3714.
APA	陈静,庄立会,沐建华,&周建松.(2020).云南文山石漠化区车桑子叶脉密度与叶氮含量关系对生境的响应.生态学报,40(11),3706-3714.
MLA	陈静,et al."云南文山石漠化区车桑子叶脉密度与叶氮含量关系对生境的响应".生态学报 40.11(2020):3706-3714.