Study on Annual Growth Dynamics of One-Year-Old Seedings of Caragana microphylla

Growth rhythm of height,diameter at ground and distribution of biomass on one-year-old seedlings of Caragana microphylla were studied in this paper.The results indicated that growth patterns of height and diameter at ground can be fitted by Scurves and can be simulated with Logistic equations.The growing period of both height and caliper was divided into 4 stages according to its growth rate: est :emergence phase of seedling,initiation phase of seedling growth.prosperous phase of seedling growth and later phase of seedling growth.The production of prosperity period was about 67 5% and 54 5%of biomass in the whole year.The paper also indicated that the biomass distribution ratio of root∶stem∶leaf was 23 8∶25 2∶51 0 and ratio of underground biomass and aboveground biomass was 0 312.According to regression analysis,height and diameter at ground were liner correlation with aboveground biomass and gross biomass,however,two of correlation value of caliper with biomass were diameter at ground than height′s.