When does the national first-class protected plant "Davidia involucrata" bloom? What is the main place of origin? What are the planting prospects? (

Davidia involucrata has been listed as a national first-class key protected wild plant, a single genus endemic to China, a relict plant, and a famous ornamental plant in the world. So when does Davidia involucrata blossom? What is the main place of origin? What are the planting prospects?

The time of blooming of Davidia involucrata

Davidia involucrata flowers usually bloom in April. Davidia involucrata bloom in late spring and early summer, flowering for up to a month, the flowers are white, like white pigeons, so they are also called pigeon trees. Davidia involucrata flowers from budding to blooming and then to withering, the color is changeable, this number of flowers, blooming for the first time, colorful, because of such a special spectacle and have the title of "a strange flower of a tree".

Distribution of Origin of Davidia involucrata

Davidia involucrata is widely distributed in China. A large number of Davidia involucrata are distributed in Wangjia Town, Gongxian County, "hometown of Davidia involucrata". Others are distributed in Zhenping and Langao in southeastern Shaanxi. Shennongjia, Xingshan, Badong, Changyang, Lichuan, Enshi, Hefeng, Wufeng, Sangzhi, Dayong, Cili, Shimen and Yongshun in northwest Hunan Northeast to northwest Guizhou Songtao, Fanjing Mountain, Daozhen, Suiyang, Bijie, Nayong, Wushan in eastern Sichuan, Pingwu and Qingchuan in the north, west to southern Wenchuan, Guanxian, Pengxian, Baoxing, Tianquan, Emei, Mabian, Ebian, Meigu, Leibo, Junlian, Nanchuan in the south of Chongqing, Qiaojia, Suijiang, Yongshan, Daguan, Yiliang, Weixin, Zhenxiong, Zhaotong The deep mountains and wild ridges of Liulong, Shidong Town, Huaiji County, Guangdong Province.

What are the planting prospects of Davidia involucrata? After the large-scale successful introduction of Davidia involucrata in Henan and other places, as well as the preliminary application in urban landscaping in Shanghai, Shandong and other places, Davidia involucrata has gradually entered the eyes of the major landscape designers. What are the new bright spots of Davidia involucrata? what development prospects can attract so many landscape designers to pay attention to it? According to analysis, Davidia involucrata is characterized by two white bracts blooming in spring, like a dove fluttering its wings and symbolizing peace and friendship. Its tree shape is tall and beautiful, and it is an extremely rare spring flowering tree in the garden. It is known as "the most beautiful ornamental tree in the north temperate zone" in Europe and America. It is an indispensable garden decoration in landscaping in the future, and many businesses have seen this bright spot and are introducing high-quality Davidia involucrata on a large scale, which leads to an increasing demand for it in the market and inestimable planting prospects.

Cultivation techniques

Seed collection

Very few fruits that fall naturally in the forest germinate by themselves. In order to propagate Davidia involucrata and Davidia involucrata, the fruit must be broken first. In the seedling stage, it is necessary to build a shed for shade and keep the seedbed moist. Cuttings should be cut with twigs, which should be carried out from May to July. High pressure can be carried out at the base of annual sturdy branches in spring. Transplanting seedlings should be carried out after defoliation or before bud germination in the following spring. The root bark and terminal bud should not be injured when the seedling is raised, and the long lateral root and branch can be pruned properly. When planting, the hole should be flat, the positive root of the seedling should be spread, and the fixed root water should be irrigated.

There are three methods of fruit crushing treatment:

1. Pour the collected fruit into the nest, like mashing rice, beat it repeatedly with a wooden stick, and pay attention to exerting it moderately. If the force is too small, the pericarp can not be completely detached, and if the force is too strong, the seeds will be mashed. Wash the mashed fruit with clean water, mix it with plant ash and sow.

2. Pile the ripe fruit directly in the dark, damp open field and let it freeze naturally to promote physiological transformation, so that the pulp is rotten and the core and shell are frozen and crisp. When the average temperature for 3 months was 6.9 ℃, the seed germination rate was 92.6%, while when the average temperature was-2.5 ℃, the germination rate was more than 98%.

3. The easiest way is to pour the ripe fruit into a covered fecal bucket, which is filled with fresh human urine and submerged all the fruit. After 6 to 7 weeks, the pulp and core shell are all rotten and then poured into the bamboo basket, washed with clean water, mixed with plant ash and then sown. This method is widely used in Changyang Tujia Autonomous County, Hubei Province, and the emergence rate is more than 95%.

Sowing and reproduction

Sowing method

Choose a well-drained, fertile and moist sandy loam or loam to do the seedbed, and the ditch depth around the seedbed shall not be less than 40 cm. The requirement of soil pH value is not strict, even if the soil with 0.15% salt content, Davidia involucrata seedlings can grow and develop. To sow seeds, use Dysen zinc, carbendazim, thiophanate, formalin and other chemicals to disinfect the soil and turn it deeply. Before sowing, trench in the seedling field, 10 to 15 cm deep and 5 to 8 cm wide, then put the treated seeds into the ditch at a distance of 10 to 15 cm, cover the soil and water thoroughly.

Time: 2019-03-19 Click: