小叶锦鸡儿1年生播种苗的生长规律

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

小叶锦鸡儿1年生播种苗苗高、地径的生长变化及生物量组分分配模式的研究结果表明,苗高、地径的生长规律符合S形生长曲线,可用Logistic方程拟合,整个生长期可划分为4个阶段,即出苗期、生长初期、生长盛期和生长后期,其中生长盛期苗高、地径的生长量分别占年生长量的637%和545%。小叶锦鸡儿播种苗根、茎、叶的生物量分配比例为238∶252∶510,地下部分与地上部分生物量之比(R/T)为0312。苗高、地径与生物量呈线性相关,且地径与地上部分生物量和总生物量的相关系数分别大于苗高与两者的相关系数。

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.