东北林业大学学报
東北林業大學學報
동북임업대학학보
JOURNAL OF NORTHEAST FORESTRY UNIVERSITY
2014年
7期
32-35,47
,共5页
王庆%李卫忠%邓宏兼%龚直文%王广儒%王道亮
王慶%李衛忠%鄧宏兼%龔直文%王廣儒%王道亮
왕경%리위충%산굉겸%공직문%왕엄유%왕도량
黄龙山林区%树种组成:直径分布%混交度%大小比数%角尺度
黃龍山林區%樹種組成:直徑分佈%混交度%大小比數%角呎度
황룡산림구%수충조성:직경분포%혼교도%대소비수%각척도
Huanglong Mountain%Species%DBH distribution%Mingling degree%Neighborhood comparison%Uniform angle index
采用面积为1 hm2(100 m×100 m)的大样地来获取黄龙山林区天然油松针阔混交林的树种、树高和直径等测树因子以及每个树种的坐标,利用混交度、大小比数、角尺度3个指标分析了黄龙山林区天然油松针阔混交林公顷级样地的空间结构特征。结果表明:(1)林分乔木层共包括17个树种,物种丰富度较高。油松、辽东栎和白桦的密度和断面积累积量占有明显优势,是乔木层的优势种。(2)林分密度大,直径在4~44 cm均有分布,但4~10 cm的林木较多。(3)整个林分混交度较高,林木多为中度、强度和极强度混交。优势树种油松、辽东栎和白桦的平均混交度分别为0.480、0.711和0.702。(4)在空间结构单元中,林分中林木的各个大小比数分布均匀,林木较稳定,大部分树种是劣态木和绝对劣态木。(5)黄龙山林区天然油松针阔混交林属于团状分布,整个林分的平均角尺度为0.543。
採用麵積為1 hm2(100 m×100 m)的大樣地來穫取黃龍山林區天然油鬆針闊混交林的樹種、樹高和直徑等測樹因子以及每箇樹種的坐標,利用混交度、大小比數、角呎度3箇指標分析瞭黃龍山林區天然油鬆針闊混交林公頃級樣地的空間結構特徵。結果錶明:(1)林分喬木層共包括17箇樹種,物種豐富度較高。油鬆、遼東櫟和白樺的密度和斷麵積纍積量佔有明顯優勢,是喬木層的優勢種。(2)林分密度大,直徑在4~44 cm均有分佈,但4~10 cm的林木較多。(3)整箇林分混交度較高,林木多為中度、彊度和極彊度混交。優勢樹種油鬆、遼東櫟和白樺的平均混交度分彆為0.480、0.711和0.702。(4)在空間結構單元中,林分中林木的各箇大小比數分佈均勻,林木較穩定,大部分樹種是劣態木和絕對劣態木。(5)黃龍山林區天然油鬆針闊混交林屬于糰狀分佈,整箇林分的平均角呎度為0.543。
채용면적위1 hm2(100 m×100 m)적대양지래획취황룡산림구천연유송침활혼교림적수충、수고화직경등측수인자이급매개수충적좌표,이용혼교도、대소비수、각척도3개지표분석료황룡산림구천연유송침활혼교림공경급양지적공간결구특정。결과표명:(1)림분교목층공포괄17개수충,물충봉부도교고。유송、료동력화백화적밀도화단면적루적량점유명현우세,시교목층적우세충。(2)림분밀도대,직경재4~44 cm균유분포,단4~10 cm적림목교다。(3)정개림분혼교도교고,림목다위중도、강도화겁강도혼교。우세수충유송、료동력화백화적평균혼교도분별위0.480、0.711화0.702。(4)재공간결구단원중,림분중림목적각개대소비수분포균균,림목교은정,대부분수충시렬태목화절대렬태목。(5)황룡산림구천연유송침활혼교림속우단상분포,정개림분적평균각척도위0.543。
We determined stand parameters including the tree height , diameter , basal area , and the coordinate of each tree in a 1-hm2 plot (100 m×100 m), and described the spatial structural characteristics of plot-level stand of Pinus tabulaeformi mixed forest in Huanglong Mountain using mingling degree , neighborhood comparison and uniform angle index .There were 17 species in arbor layer with comparatively higher species richness .Among all the species , Pinus tabulaeformi, Quercus liaotanggensis and Betula platyphylla made up three dominant species for their population density and basal area had the obvious advantage .The stand density was high , and the DBH ranged from 4to 44 cm with the majority extent from 4 to 10 cm.The mingling degree of whole stand was high and most of the woods were moderate , strong and extreme mixed .The mingling degree of Pinus tabulaeformi, Quercus liaotanggensis and Betula platyphylla were 0.51, 0.71 and 0.69, respec-tively.In the spatial structure unit , the number of neighborhood comparison evenly distributed , so the forest was stable . Most woods are in bad state and absolute poor state .The uniform angle index of the whole stand was 0.545, and the Pinus tabulaeformi mixed forest of Huanglong Mountain was aggregative distribution .