Comparative research of chlorophyll content for a number of arboreous plants is carried out using traditional spectrophotometric and fluorescent laser techniques. Seasonal changes are analyzed in the net chlorophyll content during the spring-summer period for coniferous and deciduous plants. The changes in the chlorophyll content due to pine-needles and leaves fading are observed. The experimental results are obtained using the spectrophotometric and lidar techniques to study the seasonal dynamics of chlorophyll and pigment complex destruction in the course of pine needles and leaves fading. Analysis has shown that the results obtained by different methods are identical.