Study of Leaf Annual Growth Rhythm and Content of Chlorophyll for Greening Tree Species

With greening trees species,simple leaf area,leaf index,water content of leaf and content of chlorophyll were measured and analyzed.The results showed that with the delay of different season from june to october,chlorophyll content were rise first then down,the changes of leaf area and water content was smallest,chlorophyll content and growth index rise up to maximum in august,the content of chlorophyll of Forsythia suspense were highest,simple leaf area and content of water of Syringa oblata were highest.