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Lagerstroemia breeding technology
The crape myrtle is the Lagerstroemia plant of Lythraceae and it is an important tree in the summer in China. The flowering period is longer and the flower is brighter. It attracts more and more attention in the landscaping. In recent years, the crape myrtle introduced from the United States and Japan is a cultivar of crape myrtle. Its flowers are pink, purple, white, and pink and red with white borders. Because of its low and compact plant type, the variety of flowers is varied and adaptable. The development prospects are promising. Lagerstroemia breeding usually uses sowing and cutting methods, among which the cutting method is better, not only the survival rate is high, but also the success rate of the adult plants is faster, the flowering is early, and the yield of seedlings is also higher. (1) sowing method: suitable for mass reproduction. When the seeds are ripe in October, they are harvested and dried in time, and they are stored in a dry and ventilated place with a small cloth bag. In March of the following year, first soaked with 0.2% potassium permanganate for 24-48 hours, rinse with water and put it in warm water of 40-50°C for 2 to 3 days. Before planting, the seedbed should be leveled, and the planting trench should be opened with a row spacing of 20 to 25 centimeters wide. The depth of the trench is about 3 centimeters. The seed is then evenly spread. Every 3-4 centimeters spreads 1 to 2 grains. Pay attention to shading and moisturizing after sowing. About 50 days or so, the seedlings can be sprayed out, poured once, and cultivated, rushed, and especially the seedlings work to ensure that the seedlings distance 10 to 15 cm. (2) Cutting method: Spring cutting is generally in late April. When winter cuts, the thick branches of the first year of life and blossoming were cut and buried in wet soil for storage. After the ravine had been dug out, cut it to a cutting length of about 16 centimeters and insert it into the loose sandy soil. The seedlings were 15 to 20 centimeters in length, the depth was 2/3 of the cutting length, and the watering cap was about 5 centimeters. Thick fine soil. It germinates after about 40 days. The shade began in May. In July, weeds were loosened. When the seedling height was 50 to 60 centimeters in October, it was poured into winter after it was decomposed. In March of the following year, the upper shoots of the seedlings were cut off and the rooted seedlings with a height of about 30 cm could be transplanted. Summer cuttings can be done in June. Select a strong branch with a year of good lignification and no pests and diseases, cut about 15 centimeters of cuttings, leave only the upper two or three leaves, insert into a sterile seedbed, a depth of about 10 centimeters, and then cover with a film and curtain. For moisturizing and shade. After cutting, spray water once a day to keep the humidity at 70% or more and rooting after 45 days. After the emergence of new shoots, the cuttings were gradually allowed to receive light, and fertilization was started two months later.