赤霉素和氯化胆碱对尾叶桉幼苗生长指标的影响

Effect of Gibberellic Acid and Choline Chloride on the Growth Indexes of Eucalyptu urophylla Seedling

采用盆栽方法,把赤霉素和氯化胆碱2种生长调节剂添加到富含微量元素的生物活性肥中,探讨这种复合制剂处理对尾叶桉幼苗生长的影响,为桉树生长调控和人工林精准化栽培提供理论依据。结果表明:喷施Lc复合药剂对尾叶桉幼苗的生长、根系的发育具有明显的促进作用。幼苗的株高、地径、生物量的增长分别比对照大36.7 cm、0.25 cm、3 g,经方差分析均有显著差异(P<0.05)。与对照相比,根冠比增加19.07%。Lc复合药剂处理后桉幼苗的分支数有所减少,但与对照相比没有显著差异(P>0.05)。此外,Lc复合药剂具有促使生物量优先分配到茎干的作用。

Pot experiment was used to study the effect of complex preparation on the growth of Euca- lyptu urophylla seedling, which added the gibberellic acid and choline chloride to the biological active fertilizer rich in trace elements. This was aimed to provide the theoretical basis for eucalyptus growth regulation and accurated cultivation technology of eucalyptus plantation. The results showed that Lc treatment could remarkably improve the growth of seedling and root system. Height, ground diameter and biomass of E. urophylla seedlings increased by 36.7 cm, 0.25 cm, 3 g more than the control （P 〈 0.05） respectively. Compared with control, root-shoot ratio increased by 19.07 %. Meanwhile, branch number of E. urophylla seedlings after treating by Lc complex preparation decreased, but not significant compared with control group （ P〉0.05 ）. In addition, Lc treatment could promote biomass to preferably be distributed into stem.