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利用树木年代学技术,以生长在开顶箱内的华山松为试材,研究高浓度臭氧条件下树木个体生长及典型森林生态系统的动态演变规律和适应机制.结果表明:高浓度臭氧抑制了华山松茎节的生长,茎节长度、直径年均生长量分别降低了35.0%和12.9%;年轮宽度生长量和年轮细胞数量分别降低11.5%和54.1%,但管胞直径的变化不明显.区域水平上,臭氧浓度的波动与当地植被生长变化(NDVI)显著相关.
Using the tree chronology technique, we studied the dynamic evolution and adaptive mechanism of individual tree growth and typical forest ecosystem under the condition of high concentration of ozone, and the results showed that high concentration of ozone suppressed The growth, stem length and diameter average annual growth of Pinus armandii decreased by 35.0% and 12.9% respectively. The width of ring growth and the number of annual rings decreased by 11.5% and 54.1%, respectively. However, the changes of tracheid diameter did not change At the regional level, the fluctuation of ozone concentration is significantly related to the change of local vegetation (NDVI).