Effect of Light Intensity on the Growth of Pinus yunnanensis Seedlings
In order to explore the suitable light intensity for the growth of Pinus yunnanensis seedlings in Songgui Town,Heqing County,Dali Prefecture,and provide a reference and guidance for the local Pinus yunnanensis planting industry,2-year-old Pinus yunnanensis seedlings is used as experimental materials and four different light intensity treatments are set up to compare the effects of different light intensities on the growth of Pinus yun-nanensis seedlings.The results showed that light intensity had a significant impact on the growth of Pinus yun-nanensis seedlings,and either too high or too low light intensity would to some extent affect the growth of Pinus yunnanensis seedlings.Taking into account the growth,biomass accumulation,antioxidant physiological indica-tors,and chlorophyll content of Pinus yunnanensis seedlings,it is believed that the most suitable light intensity is 75％.Therefore,it is recommended to provide appropriate shade in the cultivation of Pinus yunnanensis seedlings to facilitate their growth.
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