西南林业大学学报
西南林業大學學報
서남임업대학학보
JOURNAL OF SOUTHWEST FORESTRY COLLEGE
2015年
2期
37-42
,共6页
城市森林%林分结构%植物多样性%广州市
城市森林%林分結構%植物多樣性%廣州市
성시삼림%림분결구%식물다양성%엄주시
urban forest%stand structure%undergrowth species diversity%Guangzhou
以广州市城市森林为研究对象，在天然次生林、改造人工林和未改造人工林设置大样地进行调查，比较分析3种森林类型的林分结构特征和林下植物多样性。结果表明，天然次生林乔木层主要树种为华润楠、罗浮柿、木荷、红花荷、马尾松、鼠刺等，改造人工林主要有马尾松、杉木等造林树种与其他引进树种，未改造人工林主要有湿地松；天然次生林大径木和特大径木株数比例较高，改造人工林中小径木较多，未改造人工林径阶－株数曲线表现为双峰状正态分布；天然次生林树高分布在10～14 m的植株较多，改造人工林树高近似于正态分布，未改造人工林树高结构呈现为接近该林分平均高的植株数最多的非对称性山状曲线；天然次生林林下植物多样性最高，改造人工林次之，未改造人工林最小。
以廣州市城市森林為研究對象，在天然次生林、改造人工林和未改造人工林設置大樣地進行調查，比較分析3種森林類型的林分結構特徵和林下植物多樣性。結果錶明，天然次生林喬木層主要樹種為華潤楠、囉浮柿、木荷、紅花荷、馬尾鬆、鼠刺等，改造人工林主要有馬尾鬆、杉木等造林樹種與其他引進樹種，未改造人工林主要有濕地鬆；天然次生林大徑木和特大徑木株數比例較高，改造人工林中小徑木較多，未改造人工林徑階－株數麯線錶現為雙峰狀正態分佈；天然次生林樹高分佈在10～14 m的植株較多，改造人工林樹高近似于正態分佈，未改造人工林樹高結構呈現為接近該林分平均高的植株數最多的非對稱性山狀麯線；天然次生林林下植物多樣性最高，改造人工林次之，未改造人工林最小。
이엄주시성시삼림위연구대상，재천연차생림、개조인공림화미개조인공림설치대양지진행조사，비교분석3충삼림류형적림분결구특정화림하식물다양성。결과표명，천연차생림교목층주요수충위화윤남、라부시、목하、홍화하、마미송、서자등，개조인공림주요유마미송、삼목등조림수충여기타인진수충，미개조인공림주요유습지송；천연차생림대경목화특대경목주수비례교고，개조인공림중소경목교다，미개조인공림경계－주수곡선표현위쌍봉상정태분포；천연차생림수고분포재10～14 m적식주교다，개조인공림수고근사우정태분포，미개조인공림수고결구정현위접근해림분평균고적식주수최다적비대칭성산상곡선；천연차생림림하식물다양성최고，개조인공림차지，미개조인공림최소。
Urban forest is an important part of forest resources of China,and it played an important role in economy,ecology,society and so on.A study on urban forest of Guangzhou was made in this paper.Plots were set up in the natural secondary forest,improved plantation and unimproved plantation,the stand structure characteris-tics and species diversity of undergrowth of the three different forest types were comparatively analyzed.The results showed that the arbor layer of the natural secondary forest in Guangzhou mainly consisted of Machilus chinensis,Di-ospyros morrisiana,Schima superba,Rhodoleia championii,Pinus massoniana,Itea chinensis and so on.The im-proved plantation was mainly composed of Pinus massoniana,Cunninghamia lanceolata and other introduced tree species.The main tree species of the unimproved plantation was Pinus elliottii.The number proportion of the trees with large DBH was higher in the naturally secondary forest while the trees with middle to small DBH accounted for large proportion in the improved plantation,whereas the DBH-number curve of the unimproved plantation showed normal distribution with double peaks.More trees with height between 10 m to 14 m mainly distributed in the natu-rally secondary forest,the improved plantation approximately to normal distribution.The tree height structure of the
<br> unimproved plantation presented as asymmetric mount-formed curve close to the average height of the majority trees.The species diversity of undergrowth in the naturally secondary forest was the highest,which was followed by that of the improved and unimproved plantation.
