摘要
一、前言原始红松林下幼树生长缓慢,死亡率高,若干文献通过与桦木林光照和水热条件的对比观察,认为光是影响生长的主要原因。但同时也发现,在植物一切代谢活动最旺盛的生长季(6—9月),上述二种林下的光强(lx)
Comparative experiments have been carried out to determine the height growth, photosynthesis, nutrient content and their seasonal courses for Korean pine seedlings under different light conditions. Shadings during both growing and non-growing seasons can affect the growth of Korean pine seedlings. Insufficient light illumination reduces their photosynthetic rate, nutrient uptake and normal physiological-metabolism activities. The growth retardation of virgin Korean pine seedlings under birch forest are proven to be resulted from the double effects of growing and non-growing seasons shadings. They disturb the photosynthesis and metatolism of Korean pine seedlings and lead to their growth retardation and poor regeneration.
出处
《生态学杂志》
CAS
CSCD
北大核心
1991年第5期1-5,共5页
Chinese Journal of Ecology
关键词
红松
光合作用
光照强度
营养物质
light, photosynthesis, nutrient content, seasonal pattern, Korean pine.
