基质和温度及乙烯利对滇青冈种子发芽的影响

采用L 9(34)正交试验开展基质、温度及乙烯利浸种对滇青冈种子发芽影响的试验。结果表明,滇青冈种子发芽延续期98 d,处理组合的平均发芽率、发芽势、发芽指数和发芽速度分别为48.7%~76.2%、4.9%~16.4%、2.1~3.7粒·d-1和92~105 d,处理组合间4指标差异均达到显著和极显著水平(p<0.05或p<0.01)。基质是影响以上4个指标的主导因子,其中,森林土∶炭渣为60%∶40%的配比极显著地提高滇青冈种子发芽相关指标,35℃温度处理显著地提高滇青冈种子的发芽速度。发芽率和发芽势理论优水平组合为1.2%的乙烯利浸种置于25℃烘箱恒温处理3 h,播种于森林土∶炭渣为60%∶40%的基质中。

Effects of Planting Substrate,Temperature and Ethephon on Seed Germination of Cyclobalanopsis glaucoides

In this study,the effects of planting substrate,temperature and soaking treatment with ethephon on seed germination of Cyclobalanopsis glaucoides were investigated based on L 9(34)orthogonal test.The results showed that the average seed germination duration was 98 d and the average germination rate,germination potential,germination index,germination speed and seed germination duration of the treated groups were 48.7%-76.2%,4.9%-16.4%,2.1-3.7 seeds per day and 92-105 days respectively.Simultaneously,the significant(p<0.05)and extremely significant(p<0.01)levels were found in the 4 indicators among these treated groups.Further study found that planting substrate was the leading factor affecting the above four indicators.Among which,the proportion of 60%forest soil and 40%carbon residue significantly increased the relevant indicators of seed germination,and the temperature treatment at 35℃significantly increased the germination rate of C.glaucoides seeds.In summary,the theoretical superior combination for the germination rate and germination potential of the seeds was seeds-incubated for 3 hours at 25℃after soaking seed with 1.2%ethephon and sowed in a substrate of 60%forest soil and 40%carbon residue.