中文摘要：

作为在北半球的三主要的五叶子的松之一， Pinus koraiensis 是自然 mixed-broadleaved 朝鲜语松森林里的最重要的主导的树种类。然而， P 的新生。因为轻限制，在第二等的森林看台的华盖下面的 koraiensis 是差的。这研究被进行理解怎么 P。koraiensis 幼苗适应不同轻紧张并且什么将是为他们的建立和生长的最佳光水平。有四轻紧张的三个重复阴谋(15% ， 30% ， 60% 并且自然事件发光的 100% ，由推迟黑尼龙网的层在上面并且包围阴谋完成了) 在东方辽宁省在一个山区的区域在自然气候条件下面被建立，东北中国。80 P 的一个总数。有类似的高度和根领子直径的 koraiensis 幼苗被移植进四个阴谋。在一年到特定的轻条件的环境适应以后，光合的变量的季节的变化和当前、一岁的针的针特点在四轻紧张下面被观察。结果显示了那：( 1 )在60%处理的幼苗展出了最大的生长，它在当前、一岁的针中同意了浸透光的光合的率(最大)和黑暗呼吸率( R d )的反应，即，在60%处理的 R d 在100%处理是比那显著地低的，但是最大没在100%和60%处理在幼苗之间不同。(2 ) P。 koraiensis 幼苗有某个光合的粘性由调整他们的针特点并且因为最大， R d ，轻浸透点和赔偿指，调整生理的过程改编轻条件，针团区域，针氮和叶绿素内容是显著地( p < 0.05 )与轻紧张相关。特别，在 100% 的最大和 60% 处理显著地更高(p < 0.05 ) 比那在为当前、一岁的针的 30% 和 15% 处理。(3 ) 不同年龄的针在成长季节期间起了一个可交换的作用，即，一岁的针在早成长的季节为光合作用起了一个主要作用；当前的年针在以后的成长季节做了。这在整个成长季节保证了有效光合作用。这些调查结果建议那 P。koraiensis 为直到 8 年的幼苗至少是中立者 heliophilous 和阴影容忍的树种类。

英文摘要：

As one of the three major five-leaved pines in the northern hemisphere, Pinus koraiensis is the most important dominant tree species in the natural mixed-broadleaved Korean pine forests. However, the regeneration of P koraiensis under the canopy of secondary forest stands is poor because of the light limitation. This study was conducted to understand how P koraiensis seedlings adapt to different light intensities and what would be the optimum light level for their establishment and growth. Three repetition plots with four light intensities （15%, 30%, 60% and 100% of the natural incident irradiances, achieved by suspending layers of black nylon net above and surrounding the plots） were set up under natural climate conditions in a montane region in eastern Liaoning Province, Northeast China. A total of 80 P koraiensis seedlings with similar height and root collar diameter were transplanted into four plots. After one year of acclimation to the specific light conditions, the seasonal variations of the photosynthetic variables and needle traits of the current and one-year-old needles, and the growth parameters were observed under four light intensities. The results indicated that： （1） The seedling at 60% treatment exhibited the greatest growth, which agreed with the response of the light-saturated photosynthetic rates （Amax） and the dark respiration rate （Rd） in the current and one-year-old needles, i.e., Rd at 60% treatment was significantly lower than that at 100% treatment, but Amax did not differ between the seedlings at 100% and 60% treatments. （2） The P. koraiensis seedlings have a certain photosynthetic plasticity to adapt the light conditions by adjusting their needle traits and regulating the physiological processes, because Amax, Rd, light saturation point and compensation point, the needle mass area, needle nitrogen and chlorophyll contents were significantly （p〈0.05） correlated with the light intensities. Especially, Am,x at 100% and 60% treatments was significantly higher （p?