3种宿根花卉花期控制技术的研究

Researches on Blooming Control Technologies of Three Ratoon Flowers

通过增加越冬保护、施用植物生长调节剂的方法,提早千叶蓍、桔梗的花期。其中温室盆栽能使千叶蓍、桔梗花期提早到"五一"期间,千叶蓍花期提早23 d,桔梗花期提早54 d,效果显著。对假龙头进行延迟花期的实验研究,其中通过延迟播种能延迟花期48 d;通过品种筛选,品种间自然花期相差40 d;通过不同时期重压剪,能延迟花期40～100 d;通过适时剪除花穗,能促进假龙头进入第二次花期,有效地将花期控制到预期的时期;通过叶面喷施B9,能延迟花期5～7 d。

In order to advance the flowering time of Achillea millefolium and Platycodon grandiflorus,the methods of using more winter protection and applying the plant growth regulators were selected.When Achillea millefolium and Platycodon grandiflorus were cultured in the greenhouse,their blooming time was advanced to 1st May,which were earlier 23 and 54 days,respectively for Achillea millefolium and Platycodon grandiflorus.Also,the studies on delaying flowering time of Physostegia virginiana were carried out.The results show that the flowering time can be delayed for 48 days by late sowing,there were 40 days intervals in the natural flowering cultivars by selecting the different varieties,and the flowering time can be delayed for 40～100 days by paying attention to the compression shear in different periods.Furthermore,by pruning flower cluster timely,the second flowering of Physostegia virginiana can be promoted,and the flowering period can be controlled to the expected.By spraying B9 on the leaves,the flowering time can be delayed 5～7 days.