Effects of Different Treatment on Hypocotyl Length of Pinus yunnanensisSeedlings

The L9(34) orthogonal design was applied to understand the effects of germinative environment,microwave radiation and hormone on radicle and hypocotyl length of Pinus yunnanensis seedlings.The results show that optimal treatment combination of improving radicle and hypocotyl length was whole-day lighting,non-microwave radiating and 0.2 g/L solution of IBA soaking seeds.Germinative environment significantly influenced radicle and hypocotyl length,in which whole-day lighting was benefit to elongate radicle and hypocotyl(19.88mm and 45.69mm,respectively).Hormone solution soaking seeds primary affected on radicle length.0.2 g/L concentration of IBA solution facilitated radicle growth.There were no significant differences on above 2 parameters between the levels of microwave radiation.