Analysis of Common cultivation problems of Tulip

Except for places with alpine climatic conditions, tulips can only be planted in autumn and winter and ornamental in spring, and bloom for a short time at the same time. One plant can only bloom for about 10 days, and when the temperature is high, it will wither in 5 days. Appropriate staggered sowing date and selection of varieties with different growth periods can bloom for about a month. The corm has strong cold tolerance and can withstand the low temperature of-35 ℃ in the soil. Almost all parts of our country can be cultivated in the open field. Because tulip bulbs are expensive, it is not possible to be widely used in open field cultivation.

The ornamental planting techniques of open-field cultivation of tulips and the requirements for bulbs are as follows: 1. The climatic conditions in China determine that the flowering time of open-field ornamental cultivation is in spring, the bulbs were planted in the soil in late autumn the year before last, and the best planting time is that the soil temperature of 15cra soil layer dropped to about 9 ℃. The planting time from north to south in China is from late September to early December. 2. The row spacing of ornamental cultivation in open field is 20-25cm, and the plant spacing is about 15cra. 3. The thickness of covered soil in open field ornamental cultivation is 2 times of the height of bulb, and the shallow covered soil is easy to be damaged by freezing. 4. The low temperature after the completion of flower bud differentiation is a necessary condition for flower bud elongation and flowering, and the dormancy of flower buds cannot be broken without low temperature. In order to blossom early, it must be treated with artificial low temperature after flower bud differentiation. Those treated with 5 ℃ are called "5 ℃ balls", those treated with 9 ℃ are called "9 ℃ balls", and those without treatment are called "normal temperature balls" or "ordinary balls". Except for the areas where the soil temperature is higher than 5 ℃ in winter, open field ornamental cultivation does not need to go through 5 ℃ or 9 ℃ low temperature treatment of bulbs to save production costs. During the cultivation of "5 ℃ ball", the ground temperature of 5~10cm must be below 10 ℃ for 2 weeks, and then rise to 15 ℃ ~ 16 ℃. After the cultivation of "9 ℃ ball", there should be 6 weeks of low temperature treatment or natural low temperature period.

After flowering, the residual flowers should be cut off in time, the management of water and fertilizer should be strengthened, and weeds should be pulled out to promote the growth of seed bulbs. Under the climatic conditions of most places, the seed bulb degenerated rapidly and should be eliminated after 2-3 years of cultivation.