Davidia involucrata (g ǒ ng t ó ng) is a deciduous tree. The national first-class key protected wild plants, known as the "living fossil" of the plant world, also known as the "pigeon tree" because its flowers are like a white dove. Because of its beautiful trees and peculiar flowers, Davidia involucrata is favored by flower lovers. How is Davidia involucrata cultivated? What matters should we pay attention to when breeding Davidia involucrata? Please read down with me with your questions!
Cultivation method of Davidia involucrata cultivation method (basic knowledge): the best propagation time: the best propagation time of Davidia involucrata is from mid September to early October.
The best growing soil: deep, humus rich and well drained sandy loam is suitable for Davidia involucrata growing soil (it is best to plant directly).
Growth humidity requirements: Davidia involucrata likes cool, humid and semi shade environment.
The optimum temperature for Davidia involucrata growth is 18-22 ℃, and the temperature in winter is not lower than - 5 ℃.
Cultivation methods of Davidia involucrata: fertilizer application: Davidia involucrata is extremely sensitive to environmental changes. It is suggested to apply more farmyard manure (organic fertilizer). If there is no organic fertilizer, it can be replaced by 1 000 times of thiophanate or 500 times of mancozeb. Fertilization should be carried out in the 10th to 15th week of seedling growth period and one to two months after transplantation.
Watering points: because Davidia involucrata likes to be wet, it should be watered more to the plants to supplement the soil water. Natural precipitation is enough in rainy season, without watering. In dry and hot weather and dry season, a large amount of watering is needed, and every watering must be done through the soil layer.
Propagation points: the main propagation methods of Davidia involucrata are sowing propagation, cutting propagation and grafting propagation;
Sowing propagation: Harvest fresh fruits in October, after stratification treatment, wash the seeds with clean water, mix with plant ash or lime, and then sow them in 3-5cm deep ditch. The seedling stage needs to build a shelter and keep the seedbed moist.
Cutting propagation: it is better to use tender branches as cuttings for cutting propagation from May to July. Using annual branches to make cuttings, 15 to 20 cm long and 0.3 cm in diameter, each cuttings should have at least two internodes and two buds, and the incision should be smooth without damaging the skin. In the first ten days of March, cutting was carried out before the soil was just thawed and buds sprouted. Before planting, the soil should be carefully prepared and applied with enough base fertilizer to make the soil loose and water sufficient. The row spacing is 20 cm and the plant spacing is 10 cm. The cutting depth varies with the environmental conditions. Too deep soil oxygen deficiency is not conducive to rooting cuttings; too shallow branches exposed more, evaporation is large, cuttings easy to lose water and dry. If the climate is cold and dry during cutting, the upper end should be covered with soil properly after cutting; under warm and humid conditions, the first bud on the top can be slightly exposed to the ground. Due to the polarity of the branch, do not cut upside down. After transplanting, it should be steady to make the cuttings closely connected with the soil, and strictly prevent the lower end of the cuttings from being empty. After transplanting, the vertical seal irrigation should be permeable. After the survival of cuttings, timely irrigation, soil loosening, weeding, fertilization and pest control should be carried out. The rate of cutting seedling is about 60%. If the cuttings were treated with ABT rooting powder before cutting, the seedling rate could be increased by 10% to 20%.
Grafting propagation: 2-3-year-old seedlings should be used as rootstock for Davidia involucrata grafting. In the selection of panicles, it is best to select the flowering tree crown periphery, sunny, disease-free, robust branches of the year, and collect them after defoliation, and at the latest 2-3 weeks before branch germination. The main grafting methods are branch grafting and T-shaped budding. The branch grafting is carried out when the sap of rootstock begins to flow, and the T-shaped budding is generally carried out in the vigorous growing season from July to September. T-shaped budding is suitable for stout rootstocks
Pest control:
The common disease of Davidia involucrata is stem rot; 402 antibacterial agent can be used to coat the trunk every seven days until the disease is controlled.
Common pests are snails, scarabs; snails eat leaves, tree buds. Molluscicide can be used to eliminate or capture. Beetles can be sprayed with 1000 times of trichlorfon solution or 90% of trichlorfon.
Davidia involucrata cultivation precautions Davidia involucrata fruit crushing method 1. Pour the collected fruit into the pestle nest, like pounding rice, repeatedly beat with a wooden hammer, and pay attention to the appropriate force. If the force is too small, the peel can not be completely separated, and if the force is too strong, the seeds will be crushed. Wash the mashed fruit with clean water, mix with plant ash and then sow.
2. The ripe fruits are directly piled up in the dark and humid open field and allowed to be naturally frozen to promote the physiological transformation, so that the pulp is rotten and the core and shell are crisp. When the average temperature was 6.9 ℃ for 3 months, the germination rate was 92.6%, and when the average temperature was - 2.5 ℃, the germination rate could be as high as 98%.
3. The most convenient method is to pour the ripe fruit into a fecal bucket with a cover, and fill the bucket with fresh human urine to completely submerge the fruit. After 6 to 7 weeks, all the pulp and core shell rotted, and then poured into the bamboo basket, washed with water, seeds mixed with plant ash can be sown. This method is widely used in Changyang Tujia Autonomous County of Hubei Province, and the emergence rate is more than 95%.