The tulip is a perennial bulbaceous herb of the family Liliaceae and tulipia. It is tall and straight, with large and colorful flowers and high ornamental value. However, if care is not taken, tulips are prone to blind sticks and blind flowers.
The symptoms of blind flowers are normal development of branches and leaves. The flower buds with weak growth have white water, and the tips of the flower buds are atrophic. The stems are atrophic. The strong growers have short stems and the petal remains green or white, and they are curled together with stamens and pistils and cannot be completely opened. Blind branches, that is, only a piece of hypertrophic leaves were found on the shoots of the plants. There were no branches and no flowering branches. The reasons for this are the following:
First, it is related to variety, biological characteristics and cold treatment time: Due to the long-term tempering of the harsh natural conditions of the country of origin, the tulip not only has the characteristics of cold-tolerant and heat-resistant varieties, but also enables it to have a low temperature treatment after a certain period of time. The biological characteristics of the leaves can be fully flowered. In northern China, planting in autumn and winter can meet the requirements of low temperature, and flowering from April to May in the second year. This characteristic can be used to promote bulb cultivation at 9°C or 5°C, and can be cultivated for the whole year. The phenomenon of blind flowering in production is mainly due to the fact that the bulbs have not reached the flowering requirements because they have not been subjected to low-temperature vernalization or cold treatment for a short period of time.
Second, with the size of the bulb and the middle temperature: the production of more than 12 cm bulbs used to do the ball, such bulb buds fully developed, more than no blind flowers; bulb bulbs in the following 10 to 11 cm more than open cultivation After one year, if the flower buds are fully developed, they can also bloom normally. If they are cultivated, the rate of blind flowers is higher. It is mainly because most of the flower buds of this kind of bulb have not been fully developed. Before the cold treatment, it must be prolonged by 1-3 weeks at an intermediate temperature of 17°C to 20°C compared to a 12 cm diameter bulb. If the bulbs are of different sizes, the middle temperature is handled improperly, and cultivation is promoted. When the vegetative growth is not enough, the supply of fertilizers is not enough to cause blind sticks and blind flowers. Therefore, producers are reminded to strictly select bulb specifications according to different cultivation methods in mass production.
Third, the impact of human factors: First, when planting before the scales, should try not to lose stem buds, reduce the appearance of blind sticks. Second, artificially caused extreme heat during storage and transshipment, such as bulbs themselves or other fruits, vegetables, flowers, and engines that dissipate too much heat, causing the generation of ethylene in bulbs. When the ethylene concentration reaches 0.1 dpm, the buds will be necrotic and a large number of blind sticks will appear after cultivation.
Fourth, the impact of other factors: If the watering in the cultivation is not correct, the humidity in the greenhouse is too large, the bulb is sick and the root suffocation results in no yield at all.
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