| This paper analyzed the effect of simulated acid rain with different pH values and different treatments on chlorophyll content of four fast-growing and precious tree species in Guangxi, to provide theory basis for acid tolerance assessment in such kind of trees. By pot experiment method, four pH treatment levels (pH4.0, pH3.0, pH5.0, pH5.6) and one control (pH6.0) with five different treatments were adopted, and the chlorophyll content were determined in the whole process. The results showed that under different acid rain,the content of chlorophyll a,chlorophyll b, total chlorophyll and chlorophyll a/b of E.grandis×E.urophylla No.9, Erythrophleum fordii Oliv, Dalbergia odorifera T. Chen and Aquilaria sinensis (Lour.) Gilg showed significant difference, and the chlorophyll a/b was different under same acid rain in four species; under simulated rain, with the decrease of pH in acid rain, the chlorophyll a/b showed the trend of initial decrease and then increase, further more, different pH acid rain significantly affected the different chlorophyll index. |
