Regulation of flowering flower bulbs which way?

More types of bulb flowers, but whether it is spring or autumn planting bulbs plant flower bulbs, flower bud they are mostly carried out in the hot season. As the origin of Flower Bulbs of different climatic conditions, and thus the temperature requirements of different types is not the same, but most flower bulbs are all day-neutral plants flower when the photoperiod is no special requirements, only a few flowers, such as gladiolus, late Xiangyu and so is the long-day flowers. Bulbous flower bud is divided into two types: one type is the flower bud on the ground were completed before the Department of leaf growth; another type of flower bud in the leaf growth is carried out late. Most of autumn planting bulb flowers belonging to the former type, the optimum temperature for flower bud 17 ~ 18 ℃, if the temperature exceeds 20 ℃, not conducive to the flower bud. Daffodils, tulips and other flowering bud temperature than the temperature is low, so this type of perennial flowers in summer and autumn flower bud end, have to wait until the following year in early spring before flowering. Most part of the spring planting and autumn plant flower bulbs flower bulbs, part of the latter type, such as gladiolus, tuberose, lily, canna, etc. Gladiolus flower bud of the minimum temperature requirements above 10 ℃.

Regulation of flowering bulbous flowers often used the following measures:

(1) Select varieties, sowing, proper temperature control, this method is used to add lighting control gladiolus flowering, perennial flowers can be basically done. Selected early-type dwarf Canna flower seeds, planted in mid to late 11 within the heating in a hotbed of germination, the next spring planting in the open field, can be advanced to early May flowering; if the late-flowering species of choice, in mid-March on to the cooling bed in germination, frost after planting in the open field, flowering can be delayed until the end of October. Dahlia can choose suitable varieties flowering stages.

(2) bud control the temperature by temperature control, can have a perennial flower bud flowering earlier or later, it can extend the flowering plants are flowering. Daffodils, tulips, lilies and other bulb flowers are available this method mediation class flowering bulbs. Because these bulbs flower buds in the bulb to form, to enable its early flowering, usually as long as the bulbs after planting to provide the optimum temperature pumping raw stalk can blossom.

(3) to break dormancy bulbous bulbous flower has dormancy, spring flower bulbs planted winter dormancy; autumn planting bulb flowers in summer dormancy, the germination of bulbs, need to go through a dormant period or break stage. To break dormancy, usually low-temperature or high temperature treatment may also be used hormone treatment.
 
(4) extend the period of dormancy bulbs generally use a cool, dry and application of hormones and other methods, to extend the storage organs of dormancy can be delayed to flowering.