瑞典能源柳不同无性系扦插苗年生长规律研究

对8个瑞典能源柳(简称瑞能)不同无性系1年生扦插苗生长动态、苗木生长与气象因子的灰色关联度的研究结果表明,瑞能扦插苗的年生长规律符合Logistic曲线特征,据此方程可以建立苗高、地径与生长的拟合模型,可将苗木生长划分为3个阶段:生长初期、速生期和生长后期,其中处于速生期苗木的高和地径生长量均超过全年总量的55.2%,地径处于速生期阶段长于苗高,但两者生长量占全年总量之比较为接近,分别是56.7%和57.4%;在制约苗木生长的气象因子中,温度是苗木生长的主导因子.

Study on Annual Growth Dynamics of Sweden Energy Willow Cutting

Annual growth dynamics of one-year cutting and relation between growth of Sweden energy willow cutting and the meteoro logical factors were studied.The result showed that annual growth dynamics of cutting agreed Logistics curve feature.According to this equation,fitting model about height and ground diameter of cutting with meteorological factors could be created.According to Logistic''s model and continuous growth model of quadratic polynomial,the growing period of cutting could be divided into 3 stages,i.e.initiation phase,prosperous phase,and later phase.The growth of prosperous phase was over 55.2% of total increment.Period of ground diameters initiation phase was longer than that of the height increment.However,the two growth of prosperous phase of the total compared to nearly,respectively 56.7%,57.4%.According to partial correlation analysis,the air temperature is the key factor affecting the growth of cutting among all meteorological factors which restrict the growth of cutting.