【摘要】 以粗皮桉的26个家系为研究材料、4个杂交种无性系为对照,用3种不同剂量多效唑进行处理,以研究多效唑对粗皮桉的矮化作用特点。结果表明:施用多效唑对粗皮桉、桉树杂交种均产生了显著的矮化作用(P<0.05),但3种剂量间的矮化作用无显著差异;施用多效唑1个月后即对植株产生显著的矮化效果,但到4个月时矮化效果不再显著;粗皮桉比杂交种无性系易于矮化,多效唑处理会显著降低树种内的树高差异,促使树种内的树高更均一。更多还原

【Abstract】 Using 26 families of Eucalyptus pellita as genetic material, with 4 eucalypt hybrid clones as control, three different doses of paclobutrazol were used to study the dwarf effects on E. pellita.The results showed that there were significant(P<0.05) dwarfing effect on both E.pellita and eucalypt hybirds after the paclobutrazol application, and the effects difference between the 3 treatments became not significant. The significant dwarfing effects were observed 1 month after the application, But the effects were not significant after 4 months of the application. The height were better dwarfed on E.pellita than on the hybrid clones. In both E.pellita and hybrids clones, the height between families/clones were not significant any more or less significant after the paclobutrazol treatments.更多还原