以2a生苗为试材,对22种云杉的苗高生长节律进行测定,结果表明:22种云杉高生长均出现“慢—快—慢”的生长节律。通过Logistic曲线方程拟合,高生长进程的相关系数均达到0.91以上,方程回归性检验均达极显著水平(P<0.01),22种云杉的高生长进程呈明显的S型曲线。不同种云杉苗木高生长开始的时间与持续时间都存在较大的差异,造成苗木所积累的高生长存在差异。通过聚类分析选择出速生种长叶云杉、欧洲云杉、黑云杉、丽江云杉、蓝云杉、川西云杉、西藏云杉、粗枝云杉等8种云杉。
With 2a seedlings as test materials the height and growth rhythm of 22 kinds of spruce biennial seedlings were measureed.The results showed that the growth of 22 kinds of spruce trees is at a slow-fast-slow growth rhythm.By logistic curve equation fitting,the correlation coefficient of high growth process is more than 0.91,the equation of regression test is of significant water quality(P< 0.01),the process of growth of 22 kinds of spruce trees showed an obvious S type curve.The starting time and duration for high growth of the different kinds of spruce seedlings have significant difference,causing some difference in accumulated seedling growth.Finally,such 8 kinds of spruce as Picea smithiana Picea Norway spruce Picea mariana Picea Likiangensis Picea pungens Picea baifouriana Picea spinulosa and Picea asperata used for fast-growing species were chosen through clustering methodology.
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