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随着采伐工作的开展,东北森林的更新问题,在林业界引起了愈来愈广泛的注意。但是,为了了解森林更新的机制,必需对影响伐前和伐后更新的各个生态因子进行详细的研究。在这些因子中,光照条件无疑占有极重要的地位。研究林冠下的光照条件,不仅有助于阐明天然更新的特点,同时对了解幼树的生态学特性和森林的结构也有着重要的作用。因此,本世纪以来,特别是最近三十年来,国外有不少学者从事这方面的研究,并取得了许多宝贵的成果(Shirley,Lungegardh,Ovingtonand Madqwick,Evans,Czarnowski Maciej and Smoke Jan,等)。我国学者也进行了一些工作(王正非、王战、覃世),但总的看来,这方
With the logging work carried out, the renewal of northeast forests has drawn more and more attention in the forestry sector. However, in order to understand the mechanism of forest renewal, it is necessary to conduct a detailed study of various ecological factors that affect pre-harvest and post-harvest renewal. Among these factors, light conditions undoubtedly play a very important role. Studying the light conditions under the canopy not only helps clarify the characteristics of natural regeneration but also plays an important role in understanding the ecological characteristics of saplings and the structure of forests. Therefore, since the beginning of this century, especially in the last three decades, many scholars abroad have conducted research in this area and have achieved many valuable results (Shirley, Lungegardh, Ovington and Madqwick, Evans, Czarnowski Maciej and Smoke Jan, etc.). Chinese scholars also carried out some work (Wang Zhengfei, Wang Zhan, Qin Shi), but in general, this side