Study On The Vegetative Growth And Flowering Time Regulator Of Tillandsia

Tillandsia is a famous ornamental plant which plays a crucial role in purifying the air, and has broad prospects for market development as an ornamental plant. However, Tillandsia grows slowly due to it doesn’t have root tissues which absorbs nutrition. Clumping Tillandsia was selected as the material for studying the effects of different growth regulator and fertilizer combined treatments on its vegetative growth and the function of hypothermic treatments on the regulation during flowering phase. This study provides some references to solve the practical problem of the popularization and application of Tillandsia. The main results are as follows:(1) Tillandsia stricta tissue culture seedling which were foliage sprayed with chlormequat chloride and special fertilizer grew faster, the fresh weight, plant height and leaf width were significantly higher than the control which was sprayed with water (p<0.05), besides, the effects under the condition of light intensity was relatively high were more obvious than the condition of weak light. The leaf width of the plants which were sprayed with Hoagland nutrient solution only was significantly increased, especially sprayed with1/2Hoagland nutrient solution with full nitrogen. The leaves of the plants were obviously wider when sprayed with paclobutrazol and urea under the condition of weak light, and there was no marked difference among different concentrations. However, the width of the leaves was increased only sprayed with high concentration of paclobutrazol and urea under the condition of strong light. The effect of chlormequat chloride and special fertilizer were better than N:P:K(18:12:10) on the vegetative growth of Tillandsia. The results show that the effect of foliar application of chlormequat chloride was best on Tillandsia stricta tissue culture seedling, followed by special fertilizer.(2)The florescence of the perennial Tillandsia-stricta which were undergoing hypothermia pretreatment was delayed compared to the control which had been growingin the greenhouse, and the flowering period was postponed later with the growth of hypothermia pretreatment time. Flower number was severely reduced, or even not blossom if hypothermia pretreatment was too long (from the end of March to the mid or end of September). The experimental results are as follows:The plants which were finished hypothermia pretreatment between the end of May and the mid of July blossomed in the National Day; if the hypothermia pretreatment ended between the mid of August and the end of August, Tillandsia-stricta blossomed in New Years Day and the florescence lasted longer. Current low temperature pretreatment experiment has not been able to delay the florescence to the Spring Festival.(3)Besides, the experiments also suggest that the florescence of Tillandsia-bergeri was affected by the difference of temperature in the greenhouse in winter. Compared to the plants which were growing in greenhouse1with higher temperature, the time of the first flower was blooming and the early flowering season was postponed by13and8days respectively in greenhouse2with lower temperature, and the plants haven’t reached the full-blossom period until April20in greenhouse2.