IBA对芳樟矮林萌芽及生长的影响

Effects of IBA on Germination and Growth of Cinnamomum camphora var.linaloolifera Dwarf Forest

为了探讨喷施IBA对芳樟矮林萌芽和生长的影响,为芳樟矮林作业提供理论依据,以2 a生芳樟矮林为材料,设置5个IBA浓度梯度,采用SPSS对芳樟矮林萌芽数、萌枝数、地径、株高、冠幅、生物量和出油率进行分析。结果表明:萌芽数、地径、株高和冠幅随喷施IBA浓度的增加而增多,100 mg·L^(-1)IBA处理萌芽数最多,地径、株高和冠幅最大,IBA对萌枝数的影响不明显。单株鲜重也随喷施IBA浓度的增加而增大,100 mg·L^(-1)IBA处理单株鲜重最大,单株叶鲜重、小枝鲜重和主枝鲜重与单株鲜重变化趋势相似。喷施IBA对鲜叶出油率影响不明显,对单株鲜叶精油产量有显著影响,100 mg·L^(-1)IBA处理单株鲜叶精油产量显著高于其他处理。因此,喷施100 mg·L^(-1)IBA对芳樟矮林萌芽、生长、单株鲜叶精油产量最好。

The study aims to study the effects of spraying IBA on germination and growth of Cinnamomum camphora var.linaloolifera dwarf forest,to provide a theoretical basis for the high-efficiency cultivation of C.camphora var.linaloolifera dwarf forest.The 2-year-old of C.camphora var.linaloolifera dwarf forest as material,and a variance analysis were coducted on the germination number,sprout number,ground diameter,plant height,crown width,biomass,and oil yield in five concentrations of IBA by means of spss.The results showed that germination number increased with the increase of IBA concentration,and spraying 100 mg·L^(-1) IBA had the best effect on promoting germination number,but the effect of spraying IBA on the sprout number was not obvious.The ground diameter,plant height and crown width increased with the increase of IBA concentration,the ground diameter,plant height and crown width reached the maximum with 100 mg·L^(-1) IBA treatment.The fresh weight per plant increased with the increase of IBA concentration,and the fresh weight per plant reached the maximum with 100 mg·L^(-1) IBA treatment.The trends of fresh leaf weight,fresh branchlet weight and main branch weight per plant were similar to that of fresh weight per plant.The effect of spraying IBA on the oil yield of fresh leaves was not significant,but the effect on the oil yield production of fresh leaves per plant was significant.The oil yield production of fresh leaves per plant with 100 mg·L^(-1) IBA treatment was significantly higher than that with other treatments.Therefore,spraying 100 mg·L^(-1) IBA had the best effect on the germination,growth and oil yield of essential production of fresh leaves per plant of C.camphora var.linaloolifera dwarf forest.