关键词: 辐射松, 土壤类型, 叶绿素, 光合速率, 叶绿素荧光

Abstract: Pinus radiata seedlings were cultivated in different soils typical of west Sichuan, which were Entisols, yellow soil, gravelic purple soil, loarnic purple soil (loarnic purple soil were got from Pinus massoniana forest and Metasequoia glyptostroboides forest, which were loarnic purple soil Ⅰ and loarnic purple soil Ⅱ respectively). Main growing factors (growth of seedlings height and diameter of ground stem), chlorophyll content, photosynthetic rate and chlorophyll fluorescence were studied. The experimental results were listed as below:①The differences of seedling height growth and diameter grow th of ground stem on five types of soils were significant. The height growth and diameter growth of ground stem of Pinus radiata on loarnic purple soil Ⅰ were significantly higher than in other types of soil. ②The differences of total chlorophyll contents (Ct), chlorophyll a/b (Ca/Cb), net photosynthetic rates (Pn) and PS Ⅱ efficiency (Fv/Fm) on five types of soils were significant. The order was listed as below:loarnic purple soil Ⅰ > Entisols > yellow soil > loarnic purple soil Ⅱ > gravelic purple soil. The results suggested that Pinus radiata which were cultivated in loarnic purple soil Ⅰ grew very well, and which were cultivated in primitive soil and yellow soil grew good.

Key words: Pinus radiata, soil type, chlorophyll, photosynthetic rate, chlorophyll fluorescence