A method for controlling the secondary flowering of Willow Verbena

Abstract

The invention provides a secondary flowering regulation method for verbena bonariensis. The method includes the steps: reducing the water content of soil before the verbena bonariensis starts producing seeds and flowering number is decreased; pruning away all inflorescences; watering the verbena bonariensis once every 3 days; sequentially applying urea and phosphorus and potassium compound fertilizers; spraying gibberellic acid water solution 7-10 days after pruning; spraying daminozide water solution to leaf surfaces after sprouting; starting secondary flowering 20-30 days after pruning, andprolonging a flowering phase to the middle of November in the same year. According to the method, the water content of the soil is reduced after the verbena bonariensis produces the seeds, reproductive growth of plants is reduced, all the inflorescences are pruned away, nutrients are no longer consumed by upper seeds and florets, the gibberellic acid water solution is sprayed to promote nutritional growth of the verbena bonariensis plants and promote sprouting, the daminozide water solution is sprayed to the leaf surfaces to promote reproductive growth, flower bud differentiation and plant flowering, the fruiting rate of the flowering phase can be increased, the flowering phase is prolonged, and the appreciation time of the verbena bonariensis is prolonged.

Description

technical field [0001] The invention belongs to the technical field of flowering control methods, and in particular relates to a secondary flowering control method of Verbena willow. Background technique [0002] Willow Verbena is native to South America. It is a perennial herb. It is a commonly used flower viewing plant in garden landscapes. It is planted in single sheets or in large areas. When it blooms, it looks like purple clouds. It is one of the most commonly used flower sea plants in China. Willow leaves Verbena can survive the winter safely in areas with the lowest temperature above 0°C, and it is generally used for annual cultivation in the areas north of the Yangtze River. Plant height 100-150 cm, terminal cyme, small tube-shaped flowers on the top of the flower stem, purple or lavender. The leaves are narrowly lanceolate and opposite; the stems are square, and the whole plant is pilose. The flowering period is from April to September. Willow verbena begins to bl...

AI Technical Summary

Problems solved by technology

The leaves are narrowly lanceolate and opposite; the stems are square, and the whole plant is pilose. The flowering period is from April to September. Willow verbena begins to bloom in mid-to-early April, and begins to wither and set seeds in mid-to-late June. From the end of June to the end of September, even though the plants will bloom one after another, the corolla will turn brown due to the seeds. Although the willow verbena will bloom one after another, there are fewer flowers. From a distance, it is mainly brown fruit. Foreword, the ornamental value of willow verbena during this period is greatly reduced, and the ornamental effect is too poor compared with the effect during the period from the beginning of flowering to the full flowering stage

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