中国城市林业
中國城市林業
중국성시임업
JOURNAL OF CHINESE URBAN FORESTRY
2012年
6期
9-12
,共4页
商侃侃%胡凌%郑思俊%张庆费
商侃侃%鬍凌%鄭思俊%張慶費
상간간%호릉%정사준%장경비
动态监测样地%伐桩萌枝%成层性%复层结构
動態鑑測樣地%伐樁萌枝%成層性%複層結構
동태감측양지%벌장맹지%성층성%복층결구
dynamic monitoring plot%coppice%stratification%multilayer structure
文章以结构调控初期的城镇景观林为对象,调查测定间伐第1年主要树种的伐桩萌芽情况、萌枝数量、高度以及群落垂直结构,分析树种的萌枝能力及其群落的结构变化。结果表明,各树种的萌枝能力均较强,不同树种间存在极显著差异(F=129.5,P〈0.001),呈现"常绿树种产生数量多、植株矮小的萌枝,落叶树种产生数量较少、植株高大的萌枝"的格局。砍伐降低了林分密度,为冠层受压树种释放空间;同时,伐桩萌枝以其生长优越性快速恢复,占据高度3m以下的空间,丰富了群落的垂直结构。因此,城镇景观林结构调控时,可通过砍伐并适当保留伐桩萌枝达到既控制林分密度又促进群落分层、维持群落和景观稳定性的作用。
文章以結構調控初期的城鎮景觀林為對象,調查測定間伐第1年主要樹種的伐樁萌芽情況、萌枝數量、高度以及群落垂直結構,分析樹種的萌枝能力及其群落的結構變化。結果錶明,各樹種的萌枝能力均較彊,不同樹種間存在極顯著差異(F=129.5,P〈0.001),呈現"常綠樹種產生數量多、植株矮小的萌枝,落葉樹種產生數量較少、植株高大的萌枝"的格跼。砍伐降低瞭林分密度,為冠層受壓樹種釋放空間;同時,伐樁萌枝以其生長優越性快速恢複,佔據高度3m以下的空間,豐富瞭群落的垂直結構。因此,城鎮景觀林結構調控時,可通過砍伐併適噹保留伐樁萌枝達到既控製林分密度又促進群落分層、維持群落和景觀穩定性的作用。
문장이결구조공초기적성진경관림위대상,조사측정간벌제1년주요수충적벌장맹아정황、맹지수량、고도이급군락수직결구,분석수충적맹지능력급기군락적결구변화。결과표명,각수충적맹지능력균교강,불동수충간존재겁현저차이(F=129.5,P〈0.001),정현"상록수충산생수량다、식주왜소적맹지,락협수충산생수량교소、식주고대적맹지"적격국。감벌강저료림분밀도,위관층수압수충석방공간;동시,벌장맹지이기생장우월성쾌속회복,점거고도3m이하적공간,봉부료군락적수직결구。인차,성진경관림결구조공시,가통과감벌병괄당보류벌장맹지체도기공제림분밀도우촉진군락분층、유지군락화경관은정성적작용。
Sprout regeneration is a lasting ecological characteristic that plants respond disturbances and plays a regulating role in community structure and dynamics. The stump sprouting, quantity and height of coppice and community vertical structure of main species at the first year after thinning in landscape forest which was at the early stage of structure regulation were investigated and measured to analyze the sprouting ability of species and the structural change of community. Results indicated that the sprouting ability of all tree species were strong and the differences rose sig- nificantly among various species ( F = 129. 5, P 〈 0. 001 ), leading to the pattern that evergreen tree species could produce many lower coppices while deciduous tree species could produce fewer taller coppices. Cutting reduced the stand density and released the space for compressed tree species. Moreover the coppice could enrich the vertical struc- ture by rapidly growing and occupying the space lower than 3 m. Thus, at the time of regulating the community struc- ture of landscape forest, coppice should be retained via cutting. It could promote community layering as well as con- trol the stand density, so as to maintain the stability of both landscape and community.