Studies On Growth Rhythm And Photosynthesis Characters Of Cupressus Lusitanica Introduced Species

In this paper, we researched the Survival rate of overwintering, Growth rhythm, Photosynthesis of Cupressus lusitanica seeding. By Linear regression analysis. Logistic equation fitting, correlation analysis, factor analysis, integrated weighting methods..we preliminary draw the following conclusions:(1)The survival rate of different varieties1year old seedlings of Cupressus lusitanica:The average survival rate is81.09%, the highest survival rate is No.5, the survival rate is90.99%:the lowest survival rate is No.8, the survival rate is only68.60%.(2)Cupressus lusitanica of the different varieties diverse extremely in the height, diameter and the biomass. and the annual growth rhythm assumes the obvious5growth curve..the results indicated that growth patterns of height and diameter at ground can be fitted by5curves and can be simulated with Logistic equations.(3)The growth phase of different1year old seedlings of Cupressus lusitanica was divided, seedling height growth can be divided into:early growth stage (March24th-June25th). fast growing period (June25th-September13th). late growing stage (September13th-November18th); seedling diameter growth can be divided into:early growth stage (March24th-June3rd). fast growing period (June3rd-September14th). late growing stage (September14th-November18th).(4)1year old Cupressus lusitanica seedlings and meteorological factors have to Regression Analysis:the regression equation of meteorological factors and height growth, and the regression equation of meteorological factors and height growth, or meteorological factors and diameter growth. Affect the height growth was mainly on sunshine hours of15davs, affect the diameter growth was mainly on sunshine hours of15days and average temperature.(5)Trait correlation analysis between photosynthesis characteristics and biomass express:the photosynthesis of plants and the plants on the part, particularly on the part of the dry weight showed extremely significant or significant phase relationship. At the same time. the photosynthesis indexes also exist between the mutually inhibit or facilitate each other.(6)According to the factor analysis and comprehensive weighted score determination, different varieties of seedlings and each has its advantages and disadvantages, according to the different purposes of selecting appropriate species.