鹅掌楸属种间杂交子代生长动态分析

Dynamic Growth Analysis of Interspecific Hybrid Progenies of Liriodendron chinense

摘要:

以12 a生鹅掌楸属种间杂交子代测定林为对象，利用连年生长数据进行了生长差异性分析、相关分析和生长动态分析。结果表明：12 a子代测定林平均胸径23.3 cm，平均树高14.50 m，平均材积0.229 m3，杂交组合之间连年生长差异极显著。造林后第6年与第11年胸径、树高和材积的相关系数分别为0.903、0.911、0.914，相关密切，早期选择具有较高的可靠性。杂交子代测定林的速生期为第2年～第8年，胸径、树高生长数量成熟在第8a和9a，此时材积生长仍然保持较高水平，其生长数量成熟要晚于第11年。

Abstract:

In this paper, the growth difference analysis, correlation analysis and growth dynamic analysis were carried out based on the growth data of 12-year-old interspecific hybrid progeny test of Liriodendron chinense. The results showed that the average DBH, tree height and volume of trees were 23.3 cm, 14.50 m and 0.229 m3, respectively. The correlation coefficients of DBH, tree height and volume were 0.903, 0.911 and 0.914 respectively between 6th year and 8th year after afforestation, indicating that early selection had high reliability. The rapid growth period of the hybrid progeny test was at 2～8 year. Quantitative maturity of DBH and tree height were at 8th and 9th year, at this time, the volume growth still maintained a high level, and the growth matured quantitatively later than 11th years.