摘要
本文分析了白云山林区4种常见乔木马尾松、荷树、鸭脚木、华润楠的幼苗的生长特点、生长速度及其与生态适应性的关系.研究表明,阳性树种比耐阴性树种的幼苗地上部分及叶的生物量比例较高,而根系生物量的比例较低;株高生长较快,而根长增长较慢;生长速度一般较快.整个生长过程均呈幂函数增长.
This paper dealt with the growth characteristics,the growth speed,and the relationship between these aspects and ecological adaptability of the seedlings of four tree species in Baiyunshan, Gunngzhou. Seedlings of sun speeiee had,in comparison with that of Shade- tolera-ted species,higher percentages of leaf biomass,and lower ones of root biomass;faster growth in height and slower growth in root length;and faster increment of biomass. The growth of the seedlings showed a power way.It was.very slow in the ages of 1～3 years,especially in the third year,and speeded up from the fourth year. Relative growth rate and net assimilation rate(mean for 1～6 years)were about 20 mg/g·week and 2～4 g/m^2·week respectively. Pinus massoniana and Schoffcera octophylla had higher values,but the difference was not great between the four species.
出处
《生态科学》
CSCD
1992年第1期45-51,共7页
Ecological Science
