东北林业大学学报
東北林業大學學報
동북임업대학학보
JOURNAL OF NORTHEAST FORESTRY UNIVERSITY
2014年
1期
23-26
,共4页
空间结构%树冠结构%混交度%角尺度%大小比数%开敞度
空間結構%樹冠結構%混交度%角呎度%大小比數%開敞度
공간결구%수관결구%혼교도%각척도%대소비수%개창도
Spatial structure%Canopy structure%Mingling degree%Uniform angle index%Neighborhood comparison%Opening degree
通过对福建三明拟赤杨混交林的树种组成、树冠结构，以及主要树种的混交度、角尺度、大小比数、开敞度等调查分析，研究了拟赤杨混交林的空间结构。结果表明：拟赤杨为林分优势树种。林分组成树种丰富，林分的平均混交度为0．7，处于中度混交和强度混交之间；平均角尺度为0．57，属于聚集分布；平均大小比数为0．51，接近中庸；开敞度为0．19，生长空间严重不足，表明林分的空间稳定性较低，在空间稳定性上落叶树种优于常绿树种；胸径和树高排序为落叶树种优于常绿树种，次林层的常绿树种生长更具竞争力。
通過對福建三明擬赤楊混交林的樹種組成、樹冠結構，以及主要樹種的混交度、角呎度、大小比數、開敞度等調查分析，研究瞭擬赤楊混交林的空間結構。結果錶明：擬赤楊為林分優勢樹種。林分組成樹種豐富，林分的平均混交度為0．7，處于中度混交和彊度混交之間；平均角呎度為0．57，屬于聚集分佈；平均大小比數為0．51，接近中庸；開敞度為0．19，生長空間嚴重不足，錶明林分的空間穩定性較低，在空間穩定性上落葉樹種優于常綠樹種；胸徑和樹高排序為落葉樹種優于常綠樹種，次林層的常綠樹種生長更具競爭力。
통과대복건삼명의적양혼교림적수충조성、수관결구，이급주요수충적혼교도、각척도、대소비수、개창도등조사분석，연구료의적양혼교림적공간결구。결과표명：의적양위림분우세수충。림분조성수충봉부，림분적평균혼교도위0．7，처우중도혼교화강도혼교지간；평균각척도위0．57，속우취집분포；평균대소비수위0．51，접근중용；개창도위0．19，생장공간엄중불족，표명림분적공간은정성교저，재공간은정성상락협수충우우상록수충；흉경화수고배서위락협수충우우상록수충，차림층적상록수충생장경구경쟁력。
The survey was conducted to study the spatial structure of Alniphyllum fortune mixed forest in Sanming, Fujian Prov-ince by stand structure indexes, including species composition, canopy structure, mingling degree, uniform angle index, neighborhood comparison and opening degree.A.fortune is advantage species, and the tree species composition is rich with average mingling degree of 0.7 between moderate mixed and intensity of mixed.Average uniform angle index is 0.57 belonging to the aggregate distribution.Average neighborhood comparison is 0.51 near the moderation and average opening degree is 0.19 with serious shortage of growth space around each tree in the stand.The stand space is in lower stability and deciduous trees are better than the evergreen species, also as well as in the diameter at breast height and tree height.Sub-canopy evergreen species are more competitive in growth.
