CAJ | 학술논문

采用时空互代方法,对兴隆山山杨-白桦-青杄林及辽东栎演替不同阶段优势乔木种群组成、径级与高度级结构,以及林分和优势树种密度变化规律进行了研究. 结果表明:①随着森林正向演替的进行,阳性树种山杨、白桦等的重要值在减小,并逐渐退出森林群落;阴性树种青杄重要值在增加,并逐渐演变成优势树种和建群树种. ②胸径与树高呈逐渐增加的趋势,处于不同演替阶段的森林群落及不同优势树种径级与高度级分布表现多样而复杂. ③林分和青杄密度先增加后减小,山杨和白桦密度一直在减小. ④林分和青杄死亡株数先增加后减小,山杨和白桦死亡株数一直在减小;青杄幼苗及幼树密度先增加后减小. 研究认为,兴隆山山杨-白桦-青杄林正逐渐向青杄纯林方向演替.
채용시공호대방법,대흥륭산산양-백화-청천림급료동력연체불동계단우세교목충군조성、경급여고도급결구,이급림분화우세수충밀도변화규률진행료연구. 결과표명:①수착삼림정향연체적진행,양성수충산양、백화등적중요치재감소,병축점퇴출삼림군락;음성수충청천중요치재증가,병축점연변성우세수충화건군수충. ②흉경여수고정축점증가적추세,처우불동연체계단적삼림군락급불동우세수충경급여고도급분포표현다양이복잡. ③림분화청천밀도선증가후감소,산양화백화밀도일직재감소. ④림분화청천사망주수선증가후감소,산양화백화사망주수일직재감소;청천유묘급유수밀도선증가후감소. 연구인위,흥륭산산양-백화-청천림정축점향청천순림방향연체.
To explore the structure characteristics of dominant tree species population during forest succession process of Xinglong Mountain and provide a scientific basis for the close-to-nature management of natural secondary forest and arti?ficial pure forest in this region, by using the methods of spatial series representing temporal series, the dynamic law on composition, DBH and height class distribution of dominant tree species, and density of stand & dominant tree species about Populus davidiana-Betula platyphylla-Picea wilosonii forest during different secondary succession stages in Xinglong mountain were studied. The results showed that:①With positive succession of forest community, the important values of positive species, such as P. davidiana and B. platyphylla were gradually decreasing, and these species were withdrawing from the forest community gradually;however, the important value of negative species P. wilosonii was in?creasing, and it would be the dominant tree species and constructive species.② DBH and tree height showed a trend of increasing;and the class distributions of DBH and height about forest community and dominant tree species were various and complex in different succession stages. ③ The densities of stand and P. wilosonii increased in early stage but de?creased in latter period,whereas the densities of P. davidiana and B. platyphylla were gradually decreasing. ④The mor?tality numbers of stand and P. wilosonii increased in early stage but decreased in latter period, whereas the numbers of P. davidiana and B. platyphylla were gradually decreasing; Numbers of seedings and saplings for P. wilosonii first in?creased then decreased.The research showed community of P. davidiana-B. platyphylla-P. wilosonii forest would gradu?ally evolve to be pure P. wilosonii forest in Xinglong mountain.