论文部分内容阅读
通过对 4种透光度下黄山松苗及黄山松与麻栎混播苗连续 3年生长、生理指标的定期观测 ,以及黄山松种子综合测试 ,探讨了黄山松种群在天然林下更新的机理 .结果表明 ,黄山松种子饱满率 6 5 % ,发芽率仅为2 7% ,综合逆境活力为 2 6 % .较低的发芽率在一定程度上影响了黄山松的繁殖能力 .黄山松光合速率受太阳辐射能的影响较大 ,而受湿度、地表温度影响较小 .黄山松光补偿点高 ,从而导致其林下更新较为困难 .由于黄山松苗生长缓慢 ,针阔混播区的黄山松苗因受光条件差而生长势较弱 ,从而处于竞争劣势 .
The mechanism of the regeneration of Pinus taiwanensis populations under natural forest was discussed through the growth of Pinus taiwanensis seedlings, Pinus taiwanensis and Quercus mongolica seedlings for three years in a row, the regular observation of physiological indexes and the comprehensive test of Pinus taiwanensis seedlings. The results showed that the plumpness of Pinus taiwanensis was 65%, the germination rate was only 27%, and the comprehensive adversity activity was 26% .The lower germination rate affected the reproductive capacity of Pinus taiwanensis to some extent.The photosynthesis rate of Pinus taiwanensis was affected by the sun Radiation energy has a greater impact, but less affected by humidity and surface temperature.Huangshan pine light compensation point, which led to its difficult to update under the forest.Because of the slow growth of Pinus taiwanensis seedlings, mixed coniferous and broad-leaved areas of Huangshan pine seedlings due to poor light conditions The growth potential is weak, resulting in a competitive disadvantage.