Effects of two plant growth retardants on the growth of hydroponic Tulip
The effects of different mass concentration ratios of daminozide(B9)and paclobutrazol(PP333)on the orna-mental traits of hydroponic Tulip were studied by adding plant growth retardants to the culture solution using the previ-ously selected Tulip cultivar'Dutch Design'suitable for hydroponics as the test material.The results showed that both B9 and PP333 had dwarfing effects on Tulip,resulting in short plants,dark green leaves,and compact plant shape.Compared with the CK,the plant height treated with B9 decreased by an average of 18.69 cm,and the leaf length de-creased by an average of 3.64 cm.Compared with the CK,the plant height treated with PP333 decreased by an average of 30.66 cm,and the leaf length decreased by an average of 3.94 cm.The greater the applied mass concentration,the more obvious the dwarfing effect.However,phytotoxicity would occur when the mass concentration of B9 was higher than 2500 mg·L-1 and the mass concentration of PP333 was higher than 250 mg·L1.Based on the ornamental and dwarfing effects,the optimal applied mass concentration of B9 was 2000 mg·L-1,and the optimal applied mass concentration of PP333 was 200 mg·L-1.The results of this study have guiding significance for the dwarfing cultivation of hydroponic Tulip.
万方数据
维普
