What is the effect of temperature on flower growth?

Temperature is an important factor affecting the growth of flowers, common flowers can generally grow in the range of 4-36 degrees Celsius, in this range, with the increase of temperature, the growth rate is also gradually accelerated. In the range of suitable temperature, the physiological activity of flowers and plants is the most exuberant and the growth rate is the fastest. When the temperature is lower or higher than the suitable area and the humidity continues to decrease or rise, the growth will slow down, or even stop growing and go into dormancy. For example, cyclamen grows slowly below 10 degrees Celsius, 15-25 degrees Celsius is the suitable temperature for its growth, and the high temperature above 30 degrees Celsius is disadvantageous to its growth. Due to the different climate of their origin, all kinds of flowers can adapt to a wide range of temperatures. Each kind of flower has its own optimum temperature, minimum temperature and lowest temperature for growth. According to the adaptability of flowers to temperature, flowers can be divided into cold-resistant flowers, semi-cold-resistant flowers and cold-resistant flowers.

Effect of temperature on dormancy of flowers

Flower growth generally goes through seasonal adverse climate changes, especially temperature changes, such as dry heat, high temperature or severe cold, flowers often use dormancy to adapt to temperature changes. During dormancy, the physiological activities of flowers and plants are at a standstill in order to survive the bad climate. Flowers such as cyclamen and tulips go dormant in the hot summer. And peonies, roses, pomegranates and other flowers defoliate into dormancy when winter comes. Dormancy period generally stop fertilization, reduce watering, give cooling, ventilation, so that it safely through the summer or winter crabapple, calla lilies, geraniums and other flowers in the high temperature season, in the slow growth of semi-dormant state.

The effect of temperature on flower bud differentiation the flower bud differentiation of all kinds of flowers needs a certain temperature. Annual grass flowers sown in spring must go through appropriate high temperature to form flower buds and blossom, while autumn flowers must go through a period of low temperature to form flower buds. The process of low temperature promoting flower bud formation of overwintering flowers is called vernalization stage, and the low temperature treatment process of flowers through vernalization stage is called vernalization. Therefore, the temperature can be artificially lowered to promote flower bud differentiation so as to promote plant flowering.

All kinds of flower boats have their own suitable growth temperature, and too high and too low temperature is harmful to the growth of flowers. High temperature season * large water transpiration of flowers, such as insufficient water absorption plants are easy to die. The tolerance of all kinds of flowers to high temperature is different, such as lotus, water lilies and other aquatic flowers, cactus and succulent plants, as well as annual grass flowers and summer flowering Milan, jasmine, Jiuli incense, Fusang, crape myrtle and so on. Chung, autumn flowering such as chrysanthemum, peony, dahlia and other heat resistance is slightly poor, some autumn bulbs such as calla lily, cyclamen, Zhu Dinghong and Diaozhong Begonia, gentleman orchid and other do not bear high temperature, it is necessary to do a good job of heat prevention and cooling, otherwise it will often lead to leaf yellow shedding, poor growth or even death.

When the low temperature is below freezing, most southern flowers and herbaceous flowers can not grow. But the tolerance of flowers to low temperature is different. Autumn sowing grass flowers such as carnation, pansy, daisy and marigold can winter in the open field, while wintersweet and plum blossoms with strong cold tolerance can also blossom at low temperature.