CAJ | 학술논문

为了解燕山山地白桦天然次生林的空间结构，以河北省孟滦林场和黑龙山林场的白桦天然次生林为研究对象，对其角尺度和混交度等空间结构特征参数进行了研究。结果表明：孟滦林场和黑龙山林场的白桦天然次生幼龄林均呈聚集分布，平均角尺度分别为0．58和0．55，孟滦林场的白桦天然次生幼龄林的聚集程度高于黑龙山林场；2个地区的白桦天然次生中龄林也呈明显的聚集分布。孟滦林场白桦天然次生林平均混交度为0．32，混交树种只有2个；黑龙山林场平均混交度为0．47，混交树种达到5个。
위료해연산산지백화천연차생림적공간결구，이하북성맹란림장화흑룡산림장적백화천연차생림위연구대상，대기각척도화혼교도등공간결구특정삼수진행료연구。결과표명：맹란림장화흑룡산림장적백화천연차생유령림균정취집분포，평균각척도분별위0．58화0．55，맹란림장적백화천연차생유령림적취집정도고우흑룡산림장；2개지구적백화천연차생중령림야정명현적취집분포。맹란림장백화천연차생림평균혼교도위0．32，혼교수충지유2개；흑룡산림장평균혼교도위0．47，혼교수충체도5개。
In order to understand the spatial structure of birch natural secondary forests forest in Yanshan mountains , the birch natural secondary forests in Heilongshan Forest Farm and Mengluan Forest Farm were studied ,using angle index and mingling degree .The results showed that the young forests in Mengluan Forest Farm and Heilongshan Forest Farm were in aggregated distribution ,and the average angle index was 0 .58 for Mengluan Forest Farm and 0 .55 for Heilongshan Forest Farm .The aggregation of Mengluan Forest Farm was higher than that of Heilongshan Forest Farm . The middle-age birch natural secondary forests in both farms also had aggregated distribution . Moreover , the average mingling degree of the birch natural secondary forests in Mengluan Forest Farm was 0 .32 , with 2 mixed tree species ,and that in Heilongshan Forest Farm was 0 .47 with 5 mixed tree species .