论文部分内容阅读
本文根据1959年在凉水自然保护区(128°53′E;47°10′N)发现的一片次生黄波罗林的三次复查资料,对林分的种类组成、层次结构、生长和营养特性等进行了系统的分析。证明黄波罗纯林不稳定,伴随着其它阔叶树的侵入,黄波罗成分逐渐下降,由纯林逐步演化为混交林。在群落树种更替过程中黄波罗和山杨等先锋种生长减慢,频度减小,而水曲柳和色木等中庸性硬阀叶树种迅速发展,必将成为未来林分的优势种。在混交林中,山槐能为其提供充足的N素营养,提高森林生产力。
Based on the three reexaminations of a secondary Huang Bolin collected in Liangshui Nature Reserve (128 ° 53’E; 47 ° 10’N) in 1959, the species composition, hierarchical structure, growth and nutrient characteristics Such as a systematic analysis. It was proved that the pure Huangpuluo forest was unstable and accompanied with the invasion of other broadleaf trees, the composition of Huangporo decreased gradually and gradually changed from pure forest to mixed forest. Pioneer species such as Huangboluo and Populus grew slowly and their frequency decreased during the process of community tree species replacement. However, the mean hardwood species, such as Fraxinus mandshurica and Seleucus, developed rapidly and would become the dominant species in future stands . In the mixed forest, Huai can provide adequate N nutrition, improve forest productivity.