光强度和光照时间对色叶树叶色变化的影响
摘要： 1994~1997年我们应用分光光度计法(光谱分析法),对引进的8种色叶树在生长季节叶片自身的光合色素及花色素含量生理指标测定,绘制光合色素含量随时间变化曲线,从而找到了不同季节叶色变化的成因(内因)。由于光合色素含量与温度的关系,光照度的强弱,日照时间的长短等外部因素变化导致色叶树色深浅的变化。
关键词: 色叶树, 光合色素, 光谱分析, 光合曲线, 叶色变化
Abstract: In the period of 1994~1997, by using method of spectrophotometer (method of spectrology), wecarried out physiological data measurement for photosynthesized pigmentum and flower pigmentum content of leaves themselves of 8 varieties of color leaf tree in growth seasons, drew curves for changing of photosynthesized pigment content along with the time changes and in this we have found the internal reason of the leaf color changings in different seasons.It is because of the relationship between content of photosynthesized pigentum and the ambient temperature, the variations of external factors, including the intensity of sunlight, and length of sunshine lead to a color changing in leaves.
Key words: Color-leaf tree, Photosynthesis pigmentum, Spectrology, Pholosynthesis curve, Variation of leaf color
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