【摘要】 火炬松年抽梢1~7次,平均抽梢4次,以抽3~5次梢为主,占91.5%;家系间平均抽梢次数无显著差异,但家系×立地存在互作;抽梢次数与树高呈正相关,树高生长随抽梢次数增加而增加。逐步回归分析表明:当年抽高生长因子被选入所有不同抽梢次数的回归方程中,它是左右树高生长的重要因子;年内第3次抽梢长度也是影响树高生长的因子。它们能否充当早期预测指标,有待进一步研究。更多还原

【Abstract】 Pinus taeda sprouts 1 to 7 times annually,the average 4 times,most of the families 3 to 5 times that occupy 91.5 per cent of one year.There were no significant difference among the families,but interaction between the families and the environmental sites.There were positive correlation between sprouting times and the average height increment.The progressive regression analysis showed that in the regressive equation,the annual sprouting growth factor selected into all different sprouting times and sprouting times were the important factor affecting its height growth,and the 3rd sprouting length annually was also its influence factor.Further researches will be done for using the results in prediction.更多还原