作　　者： ; (赵鲲）; (焦云德）; (郁军环）; (赵红军）;

机构地区： 洛阳市林业科学研究所河南471002

出　　处： 《河南林业科技》 2010年第3期1-3,16,共4页

摘　　要： 通过对12个楸树杂种无性系的研究表明,楸树杂种无性系苗期苗高、地径生长节律符合"S"型曲线,其生长进程均表现出明显的"慢-快-慢"的节律。采用Logistic生长方程对动态生长节律进行拟合,相关系数达0.99以上,拟合的效果极显著。楸树速生期的天数占整个生长期的比重为47%,速生期内的生长量占整个生长量的60%以上;楸树杂种无性系苗高生长峰值出现在7月中旬,地径峰值在7月上旬,苗高速生期开始时间为6月上旬,地径速生期开始时间5月下旬。苗高速生期结束时间为9月初,地径速生期结束时间在8月下旬,苗高速生期持续天数86 d,地径速生期持续天数89 d。 The research of 12 hybridal clone of Catalpa bunge showed that the growth rhythm of the seedling height during seedling stage and ground diameter matched perfectly with ＂S＂ curve,the growth process was showed obviously ＂slow-fast-slow＂ rhythm.The dynamic growth rhythm was fitted by Logistic Growth Equation and the correlation coefficient was above 0.99,reaching significant level.The rapid growth period was accounted for 47% of the total growth period and the amount of growth during this period was accounted for 60% of the total increment.The growth peak value of seedling height of hybridal clone appeared in mid-July while the peak value of ground diameter appeared in early-July.The rapid growth period of seedling height and ground diameter started in early June and late May respectively.The ending time of rapid growth period of seedling height and ground diameter were at the beginning of September and in late August respectively.The rapid growth period of seedling height and ground diameter lasted for 86 days and 89 days respectively.

关 键 词： 楸树杂种无性系 型曲线 年生长参数

领　　域： [农业科学] [农业科学]