邵阳市城区主要绿化乔木叶片性状研究

Study on Leaf Characters of Main Greening Arbor in Shaoyang City

【目的】揭示邵阳市主要绿化乔木在不同功能区的表现特征,寻找功能区适合栽种的树。【方法】在邵阳市选取商业区、住宅区、休闲区、文教区、工业区、道路交通沿线六大功能区,以桂树与樟树为研究对象,研究其干物质含量、比叶面积、SPAD(叶绿素含量)、叶氮含量和叶磷含量5个指标。采用了相关系数分析与双因子两种分析方法。【结果】功能区的变化对于叶片干物质含量SPAD、比叶面积、N含量有显著影响,樟树的P含量与功能区存在显著性,功能区与桂树树叶的P含量不存在显著性差异。树种与功能区对于叶片的SPAD、N含量、P含量存在影响较大呈极显著相关,与叶干物质含量呈显著相关;树种与植物的叶片比叶面积、叶干物质含量、叶的SPAD、叶P含量呈极显著相关;功能区因子与叶片的比叶面积,SPAD,N含量,P含量呈极显著相关;比叶面积与树叶的SPAD、干物质含量、P含量均呈现显著相关;SPAD值与磷含量在上层树叶呈现显著相关。【结论】工业区栽种桂树比较适宜。研究结论可以给城市中绿地的规划与城市的建设提供一定的理论依据。

【Objective】Reveal the features of plant traits in different functional areas of Shaoy-ang City and find suitable trees for planting in functional areas.【Method】The plant dry matter con-tent,specific leaf area and SPAD(chlorophyll content),leaf nitrogen content and the phosphorus con-tent of osmanthus and camphor trees in commercial district,residential district,recreational district,cul-ture&education district,industrial district Shaoyang City.Two methods of correlation coefficient analy-sis and double factor analysis were used.【Result】Changes in functional zones had significant effects on dry matter content(SPAD),specific leaf area(SLA)and N content of leaves.The P content of cam-phor tree was significantly different from that of functional zones,while the P content of leaves of the cinnamon tree was not significantly different from that of functional zones.The tree species and func-tional zones had a significant influence on the SPAD,the N and P content of leaves,which was signifi-cantly correlated with the dry matter content of leaves.The specific leaf area,the leaf dry matter content,the leaf SPAD.Leaf P content of tree species and plants were significantly correlated.The regional fac-tors are substantially correlated with the specific leaf area,the leaf SPAD,the N content,the P content of leaves.The specific leaf area was substantially correlated with the SPAD,the dry matter content and the P content of leaves.There was an important correlation between the SPAD value and phosphorus content in upper leaves.【Conclusion】According to the results,it is more suitable to plant osmanthus in an industrial area,which can provide the theoretical basis for urban green land planning and building.