生境光强对云南金钱槭幼苗生长及光合速率的影响

Effects of Environment Light Intensity on the Photosynthesis Rate and Growth of Dipteronia dyeriana Seedlings

在不同生境光强,即100%自然全光照(Natural sunlight,NS)、80%NS、25%NS、5%NS的人工遮阴条件下,研究了生境光强对云南金钱槭(Dipteronia dyeriana Henry)幼苗生长及光合速率的影响。结果表明,光照是影响幼苗生长的重要环境因子。株高、基径、生物量和光合速率均以5%NS处理的最小,基径、生物量和光合速率随着遮阴程度的增加而减小。80%NS的处理对云南金钱槭幼苗的生长最有利,幼苗的株高、基径、生物量和光合速率均在80%NS处理下获得了最大增长,说明适当遮阴(80%NS)有利于云南金钱槭幼苗的生长。

Under different light intensities such as 100% natural sunlight （NS）,80% NS,25% NS,5% NS in shade house,effects of light intensity on the photosynthesis rate and growth of Dipteronia dyeriana seedlings were studied.The preliminary results were as follows： Light was an important environmental factor for the growth of D. dyeriana seedlings.The plant height, branch diameter, total biomass and photosynthesis rate were the smallest under 5% NS. Light intensity was positively corre- lated to branch diameter, total hiomass and photosynthesis rate of D. dyeriana seedlings. The treatmant of 80% NS was most suited for established seedlings in plant height, branch diameter, total biomass and photosynthesis rate. Appropriate shade of 80% NS was beneficial to D. dyeriana seedling growth.