生长抑制剂对当归早期抽苔阻抑效应研究

目的：探讨控制当归早期抽苔的化学调控途径。方法：用不同浓度的ＰＰ３３３，Ｂ９，ＭＨ单独或混合物在当归不同时期叶面喷洒。结果：用适宜浓度的ＰＰ３３３，Ｂ９，ＭＨ单独或混合物在当归增叶期叶面喷洒，可有效控制早期抽苔，提高根重和根冠比，缩短第１茎节长度，增加基节粗度，提高叶片光合生理特性，还使根头体积增大，优等当归出成率提高。但在盛叶期处理效果不明显，浓度过高也抑制地上地下的生长。结论：生长抑制剂处理增叶期的当归植株，可有效控制当归的早期抽苔。

A Study on Inhibitory Effect of Plant Growth Retardants on Earlier Bolting of Chinese Angelica

Objective:Seeking chemical ways of controlling the earlier bolting of Chinese Angelica(CA).Method:PP 333 ,B 9 and MH in different concentrations and combinations were sprayed into the CA leaves in different periods.Result:In leaf proliferating period the spray could inkibit the earlier bolting,shortening the length of the stem foot,increasing the stem diameter and enhancing the leaf chlorophy 11 contents.The quality of CA production was increased as a result of greater root weight and main root volume.In leaf luxuriatino period the spray showed no marked effect.The growth of the plant would be inhibited by any spray in excessive concentrations.Conclusion:Leaf spray could control the earlier bolting of CA.