CN115039621B

CN115039621B - Propagation method of Chinese careless flower seedlings

Info

Publication number: CN115039621B
Application number: CN202210649101.6A
Authority: CN
Inventors: 徐桂红; 黄天萍; 李凌飞; 杨蕾蕾; 陈朋; 秦密
Original assignee: Shenzhen Xianhu Botanical Garden Shenzhen Garden Research Center; Xishuangbanna Tropical Botanical Garden of CAS
Current assignee: Shenzhen Xianhu Botanical Garden Shenzhen Garden Research Center; Xishuangbanna Tropical Botanical Garden of CAS
Priority date: 2022-06-09
Filing date: 2022-06-09
Publication date: 2024-05-28
Anticipated expiration: 2042-06-09
Also published as: CN115039621A

Abstract

The invention relates to the technical field of seedling propagation, and particularly provides a propagation method of Chinese careless flower seedlings. The propagation method comprises the following steps: orthographic projection of mature longan trees on the ground is taken as a first area; selecting a region from the center of the longan tree to 1-2 m away from the edge of the first region as a second region; weeding, turning soil and leveling the second area to obtain a nursery area; performing seed sterilization treatment on the Chinese russian flower seeds to obtain seeds to be sown; sowing the seeds to be sown in the nursery area, covering the seeds to be sown with soil of the nursery area, and carrying out watering treatment on the nursery area; after the seeds germinate for one year, controlling the temperature of the nursery area to be above 15 ℃ and the relative humidity to be above 35%, and timely performing weeding, pest killing and watering treatment. The propagation method provided by the invention can obtain the Chinese careless flower seedlings with high survival rate and good growth state.

Description

Propagation method of Chinese careless flower seedlings

Technical Field

The invention belongs to the technical field of seedling propagation, and particularly relates to a propagation method of Chinese careless flower seedlings.

Background

Chinese russeless flower (SARACA DIVES PIERRE) is a leguminous russeless plant and has higher ornamental value.

The seedlings refer to seedlings grown by germination of seeds. The plant has the characteristics of developed root system, strong vitality, large plasticity, long service life and the like. The cultivation of the seedlings accords with the natural growth and development rule of the trees.

The conventional propagation modes of the Chinese carefree flowers include sowing, cutting, high-altitude layering, tissue culture and the like. However, the following difficulties exist in the propagation of Chinese carefree flowers:

In south China, the fruits of the Chinese careless flowers are ripe in 7-8 months, in the hot rainy season, the fruits are easy to carry germs, and in addition, the slugs, snails and the like gnaw the fruits falling on the ground, so that the sowing budding rate and the seedling rate are generally low.

The cutting mode and the high-altitude layering mode have the problems that the stem is difficult to root, the callus is difficult to form and the like, and if mass propagation has high requirements on the quantity and quality of female parents, the mass production is difficult.

The tissue culture mode is used in the stages of explant, callus subculture, suspension cell culture and the like, however, woody leguminous plants often produce browning phenomenon during propagation and culture, and the tissue culture difficulty is high.

Based on the reasons in various aspects, the propagation of Chinese careless flowers in China has some difficulties, and the main appearance is that the seedling rate is lower.

Disclosure of Invention

Aiming at the problems of difficult propagation of the current Chinese russian flowers and the like, the invention provides a propagation method of seedlings of the Chinese russian flowers.

In order to achieve the above purpose, the invention adopts the following technical scheme:

a propagation method of Chinese careless flower seedlings comprises the following steps:

orthographic projection of mature longan trees on the ground is taken as a first area;

Selecting an area which is retracted from the edge of the first area by more than 1m towards the position of the root neck of the longan tree as a second area;

Weeding, turning soil and leveling the second area to obtain a nursery area;

performing seed sterilization treatment on the Chinese russian flower seeds to obtain seeds to be sown;

Sowing the seeds to be sown in the nursery area, covering the seeds to be sown with soil of the nursery area, and carrying out watering treatment on the nursery area;

and after the seeds germinate for one year, controlling the temperature of the nursery area to be above 15 ℃ and the relative humidity to be above 35%, and timely performing weeding, pest killing and watering treatment.

Further, the method further comprises forming a drain channel around the longan tree at any position between the edge of the nursery area and the edge of the first area.

Further, controlling the distance between the branch closest to the ground of the longan tree and the nursery area to be 1.0-1.5 m;

And/or, the longan tree has a tree age of between 5 and 30 years, and the first area has no herbicide applied for the last three years.

Further, the distance between two adjacent seeds to be sown in the nursery area is 15 cm-30 cm;

and/or the thickness of the soil covering the seeds to be sown is 0.5 cm-1.5 cm.

Further, before the seeds to be sowed are sowed in the nursery area, the pH value in the soil on the surface layer of the nursery area is ensured to be 5.6-7.0, the effective phosphorus concentration is 20 mg/kg-50 mg/kg, the effective zinc concentration is 0-5 mg/kg, the ammonium nitrate nitrogen content is 5 mg/kg-20 mg/kg, the humus content is 20 g/kg-50 g/kg, the mass ratio of humic acid carbon to humic acid carbon is 0.65-0.75, and the water content is 11% -15%.

Further, the method also comprises the step of transplanting the sapling when the sapling grows to 1-2 m.

Further, the longan tree is subjected to branch thinning treatment within one year before the tree seedling is transplanted, so that the tree seedling is subjected to sunlight irradiation and domestication.

Further, the seeds are from natural mature seeds of the Chinese russian flowers.

Further, the natural mature seeds of the Chinese carefree flowers are obtained in the following manner:

Arranging a collecting net under the Chinese russian flowers, wherein a distance is reserved between the collecting net and the ground, and when the Chinese russian flowers naturally mature and naturally fall into the collecting net, transferring the seeds into a sterilizing liquid to be soaked for 5-10 min, and airing the seeds at a position without direct light in a shady and cool ventilation mode.

Further, the method also comprises the step of carrying out seed coat laceration treatment on the seeds to be sown.

The beneficial effects of the invention are as follows:

Compared with the prior art, the propagation method of the Chinese russian flower seedlings provided by the embodiment of the invention has at least the following advantages that firstly, the special conditions of shade and regular pruning of longan trees, rich humus under forests, temperature, humidity, light conditions and the like are fully utilized, and the propagation method is favorable for promoting the germination of Chinese russian flower seeds; in the second aspect, natural domestication is combined for Chinese careless flower seedlings, so that the problem that the seedlings easily die from a greenhouse to the outside is avoided, and the success rate of seedling raising is improved; in the third aspect, the whole process does not need to additionally apply organic fertilizers, chemical fertilizers and the like, so that the utilization of non-renewable resources is reduced, and the environmental pollution is reduced; in the fourth aspect, the characteristics that the Chinese careless flowers need to be shaded in the seedling stage and the whole sun is needed after the seedlings are grown are fully respected, and the healthy growth of the Chinese careless flowers is promoted. The method has higher seedling rate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic top view of a divided area covered by a longan tree according to an embodiment of the present invention;

FIG. 2 is a schematic top view of the longan tree covered region of FIG. 1 after being flattened;

FIG. 3 is a schematic front view of the longan tree and its coverage area in FIG. 2;

fig. 4 is a schematic diagram of the embodiment of the present invention after the seed to be sown breaks the epidermis;

FIG. 5 is a simplified schematic diagram of a method for propagating Chinese careless peanut seedlings according to an embodiment of the present invention after planting seeds to be sown in a nursery area;

FIG. 6 is a simplified schematic diagram of a Chinese careless flower seed picking according to an embodiment of the present invention;

FIG. 7 is a simplified schematic diagram of a Chinese careless flower seed picking according to another embodiment of the present invention;

fig. 8 is a physical diagram of the Chinese fig pod exploded to expose seeds obtained from the collecting net according to the embodiment of the invention;

FIG. 9 is a diagram of a good quality seed of Chinese careless flowers according to the embodiment of the present invention;

Fig. 10 is a schematic diagram of a part of a Chinese careless flower seed according to an embodiment of the present invention;

Fig. 11 is a physical diagram of a chinese careless flower seedling obtained by propagating a 1# longan tree for two years according to the propagation method of a chinese careless flower seedling provided by the embodiment of the present invention;

Fig. 12 is a physical diagram of a chinese careless flower seedling obtained by propagating a chinese careless flower seedling under a 5# longan tree for two years according to the propagation method of the chinese careless flower seedling provided by the embodiment of the present invention.

Reference numerals illustrate:

10. longan tree;

20. ground surface; 21. a first region; 22. a second region; 23. a nursery area; 24. a drain channel;

30. sowing seeds; 31. scoring;

40. Flower of Chinese Andrographis paniculata; 50. a collection net; 51. a support frame; 52. a net body; 60. a bactericidal agent.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1 to 7, an embodiment of the present invention provides a method for propagating chinese careless flower seedlings.

Specifically, the propagation method of the Chinese carefree flower seedlings comprises the following steps:

(1) The front projection of the mature longan tree 10 on the ground 20 is taken as a first area 21.

In step (1), the orthographic projection of the longan tree 10 on the ground 20 refers to that parallel light irradiates from the top of the longan tree 10 to the ground, and the area surrounded by the tree shadow of the longan tree 10 on the ground is the orthographic projection, that is, the first area 21. In some embodiments, the mature longan tree 10 refers to a longan tree with the tree age of 5 years to 30 years, such a longan tree 10 should also grow normally without risk of withering, and the ground 20 near the longan tree 10 with the tree age of 5 years to 30 years has more humus, light and humidity suitable for the growth of Chinese careless flower seedlings. Because the longan and the Chinese careless tree are straight root plants, the method is characterized in that the main root is developed, long and thick, and the lateral root is short and thin, the soil under the longan tree 10 is selected as a propagation place of the Chinese careless flower seedlings, the longan tree 10 is not damaged, and the longan tree 10 and the Chinese careless flower seedlings cannot struggle with each other to obtain fertilizer water.

After the longan tree 10 is selected, the longan tree 10 is subjected to daily pruning, and the distance (H) between the ground 20 of the first area 21 and the lowest branch of the longan tree 10 is kept between 1.0m and 1.5m, namely, the distance between the leaves of the longan tree 10 and the nearest branch of the longan tree and the ground 20 is more than 1.0m, but is not more than 1.5m, if the lowest branch is too high, too much sunlight easily enters the first area 21 in the two periods of morning and afternoon, and the growth of Chinese careless flower seedlings is not facilitated. The longan tree 10 is normally thinned and fertilized each year in a conventional manner of planting the longan tree, and specifically, the longan tree 10 can be thinned and fertilized after the longan is harvested.

For the selected longan tree 10, no herbicide such as glyphosate, paraquat, prometryn, etc. should be applied within the first region 21 over the last three years, otherwise the germination of chinese careless flower seeds would be affected.

It should be noted that fig. 1 and fig. 2 illustrate that the tree shadow of the longan tree forms a circular area, which is only for convenience of illustration, and the area enclosed by the tree shadow of the specific longan tree may be not circular, or may be other shapes, and fig. 1 and fig. 2 do not limit the shape of the area enclosed by the tree shadow of the longan tree.

(2) The second region 22 is selected from the region where the edge of the first region 21 is retracted by 1m or more toward the position where the root neck of the longan tree 10 is located.

In step (2), the second region 22 is selected by retracting the root neck of the longan tree 10 by 1m or more from the edge of the first region 21, and the region from the root to the root neck is called the second region 22. The root neck of the longan tree 10 refers to the junction between the underground part and the aerial part of the longan tree 10. Or alternatively, the root neck of the longan tree 10 is used as the origin, the root neck of the longan tree 10 is expanded in a direction away from the root neck of the longan tree 10, the ground within the line from the root neck of the longan tree 10 to the edge of the first area 21 is used as the second area 22, and the distance between the edge of the second area 22 and the edge of the first area 21 is more than 1m, such as 1 m-2 m. The second region 22 thus defined has a smaller amount of sunlight, and can provide a more excellent shade area for the germination and growth of chinese careless flower seedlings. The distance between the edge of the first region 21 and the edge of the second region 22 shown in fig. 2 and 3 is D, D being between 1m and 2m, the diameter of the second region 22 being 2R, the diameter of the first region 21 being 2R, D being the difference between R and R.

(3) Weeding, soil turning and leveling treatment are carried out on the second area 22, and a nursery area 23 is obtained.

In step (3), the second area 22 is subjected to weeding, and before weeding, the non-decomposed branches and leaves can be collected under the trunk of the longan tree and stacked. Weeding is beneficial to leveling and managing the second area 22 on one hand, and on the other hand, the influence of weeds on the propagation of Chinese carefree flower seedlings can be effectively avoided. After weeding, the soil is turned and leveled in the area where the grass is removed, so that the soil is loose and sowing is facilitated. The soil in the second area 22 is detected before weeding, after weeding or after turning soil and leveling, so that the pH value is 5.6-7.0, the effective phosphorus concentration is 20 mg/kg-50 mg/kg, the effective zinc concentration is 0-5 mg/kg, the ammonium nitrate nitrogen content is 5 mg/kg-20 mg/kg, the humus content is 20 g/kg-50 g/kg, the mass ratio of the humic acid carbon to the humic acid carbon is 0.65-0.75 and the water content is 11% -15% in the surface soil of the nursery area 23. If the listed conditions are not met, the longan tree can be abandoned, and the longan tree with proper conditions can be found. Of course, it is also possible to detect whether the surface soil of the area surrounded by the orthographic projection of the longan tree 10 on the ground satisfies the condition, and if the condition is not satisfied, the first area 21 may not be divided or selected. For the detection of surface soil surrounded by the orthographic projection of the longan tree 10, sampling can be carried out according to GB/T36197-2018 soil quality soil sampling technical guidelines. The soil meeting the conditions belongs to the high-phosphorus high-zinc low-nitrogen weak acidic soil, is favorable for promoting the increase of the humus content, the water content and the total air gap of the soil, forms a permeable moisture-preserving air-permeable soil environment, is favorable for the growth of rhizobium tropical rhizobia, promotes the growth and development of root systems of Chinese indian flowers, and is suitable for the germination of Chinese indian flower seeds and the growth of seedlings.

After the treatment of step (3), it further comprises forming a drain channel around the longan tree 10 at any position between the edge of the nursery area 23 and the edge of the first area 21. By designing the drain channel 24 around the longan tree 10 to facilitate the timely flow and discharge of water for subsequent watering or raining, soil hardening in the nursery area 23 is effectively prevented. In some embodiments, the drain channel 24 has a width of between 5cm and 15cm and a depth of between 15cm and 25 cm. In some alternative embodiments, radial branch channels are formed in the nursery area 23 centering on the trunk of the longan tree 10, and the branch channels are connected with the drainage channels 24, so that drainage is better performed to prevent soil hardening in the nursery area 23. In some embodiments, the method further comprises controlling the shortest distance between the branches of the longan tree 10 and the nursery area 23 to be 1.0 m-1.5 m, and if the longan tree 10 grows out and grows downwards in the process of cultivating and breeding the Chinese carefree flower seedlings, pruning treatment should be performed timely.

(4) Sterilizing the Chinese russian flower seeds to obtain the seeds to be sown 30.

In the step (4), the Chinese ruscus aculeatus seeds come from natural mature seeds of the Chinese ruscus aculeatus.

Referring to fig. 6 or 7, natural mature seeds of chinese careless flowers can be obtained as follows:

Arranging a collecting net 50 under the Chinese russian flowers 40, keeping a distance between the collecting net 50 and the ground, and transferring the seeds to a sterilizing liquid in time for soaking for 5-10 min when the seeds of the Chinese russian flowers naturally mature and naturally fall into the collecting net 50; and then airing in a shade and ventilated place without direct light. In some embodiments, the bactericidal liquid comprises 300-400 times the liquid of 25% carbendazim wettable powder (25% carbendazim wettable powder is a trade name, wherein 25% represents the mass concentration of its active ingredient). In the south China, the Chinese careless flowers 40 are generally ripe in the period from July to August, so that the collecting net 50 is laid under the Chinese careless flowers 40 at the bottom of July or at the beginning of July, then the collecting net 50 is checked every 2-4 days, if mature seeds naturally fall into the collecting net 50, the mature seeds are transferred in time, and if the mature seeds are leaves or other sundries, the mature seeds are cleaned in time so as to avoid rotting and fermenting to breed bacteria or fungi, or slugs, snails and the like are introduced. The judgment of the mature seeds can be judged by the colors of the fruits, pods and seeds of the Chinese indian flowers, the colors of the fruits, pods and seeds of the Chinese indian flowers are green in the immature state, the colors of the fruits, pods and seeds of the Chinese indian flowers are all green in the mature state, the colors of the fruits, pods and seeds of the Chinese indian flowers are changed into brown in the mature state, and if the fruits, pods and seeds of the Chinese indian flowers naturally mature into the collecting net 50, the pods crack and the seeds fall, and if the pods do not crack, the seeds of the Chinese indian flowers are poorer in maturity and discarded.

In the case of collecting the seeds of the chinese careless flowers, the collecting net 50 may be hung under the chinese careless flowers 40 as shown in fig. 6 and spaced apart from the ground. Alternatively, as shown in fig. 7, the collecting net 50 includes a supporting frame 51 and a net body 52 supported by the supporting frame 51, and the sterilizing agent 60 is placed on the supporting frame 51 to prevent bacteria from breeding from the supporting frame 60 to the net body 52, and the sterilizing agent 60 may be contained in a container or may be directly coated on the supporting frame 60. When the chinese careless flower seeds are collected according to the structure of the collecting net 50 shown in fig. 7, at least two collecting nets 50 are required, and the two collecting nets 50 are respectively disposed at opposite sides of the chinese careless flower 40 and are disposed side by side with each other. Of course, in some alternative embodiments, four collection screens 50 may be used, with four collection screens 50 surrounding the chinese carefree flower 40.

(5) The seed 30 to be sown is sown in the nursery area 23, the seed 30 to be sown is covered with soil of the nursery area 23, and the nursery area 23 is watered.

In the step (5), the seeds which are to be sown 30 and are subjected to the air drying treatment in the step (4) within 1-7 days should be sown, and the seeds which are subjected to the sterilization treatment should not be placed for too long, because the Chinese russian flower seeds are recalcitrant seeds and are not resistant to water loss, and the seeds need to enter a sprouting state soon after harvesting. In some embodiments, before sowing the seed to be sown in the nursery region 23, the seed to be sown 30 is further subjected to a seed coat laceration treatment to form scratches 31. By scratching the seed coat, water absorption of the seeds can be promoted, and germination is promoted. If the seed coat is not scratched, the component of the seed coat is a lipid component, so that the seed coat has hydrophobicity and a long natural water absorption process. If the water swelling time of the seeds is too long, the germination rate of the seeds is affected. In some embodiments, the seed coats are scored into a cross-shaped score 31 or an x-shaped score 31 when the seed coats are lacerated, and the abdominal line of the seed 30 to be sown should be avoided, which if lacerated affects the cracking of the seed 30 to be sown and increases the risk of microbial infection. When the seed 30 to be sown with the seed coat being scratched is placed in the nursery area 23, the scratch 31 is ensured to face away from the sky, water absorption of the seed is facilitated, and when the seed absorbs water, expands and germinates, the seed is cracked at the lower abdominal suture line; along with the elongation of the hypocotyl, the radicle is convenient to grow on the matrix, and meanwhile, the embryo is elongated to break the soil, so that the germination rate of the seeds is improved. Because the seeds can form a large expansion force to promote the seeds to split after absorbing water, and the cracks are difficult to widen secondarily due to the fading of resistance after splitting, the seeds are horizontally placed, radicle and embryo are simultaneously elongated and grow space, and the radicle and embryo are vertically placed, inverted or laterally placed, only elongated and grow space at one part of the radicle or embryo can be provided, and the germination rate is not improved.

In some embodiments, the spacing between two adjacent seeds 30 to be sown in the nursery area 23 is between 15cm and 30cm, so that weeding, fertilization and the like are convenient after the seeds 30 to be sown sprout and grow. In some embodiments, the thickness of the soil covering the seed 30 to be sown is 0.5 cm-1.5 cm, the covered soil is too thin, the seed moisture is easily evaporated, the moisture is not easily maintained, and the covered soil is too thick, the germination is not easily performed. At the time of sowing, it is necessary to reserve an area for fertilization of the longan tree 10.

The watering treatment should ensure that the watering amount is moderate, and the hardened soil is not formed.

(6) After the seeds germinate for one year, the temperature of the nursery area 23 is controlled to be more than 15 ℃ and the relative humidity is controlled to be more than 35%, and weeding, pest killing and watering treatments are timely carried out.

In the step (6), germination occurs 30-60 days after sowing, and if damage of snails and the like is found in the period, pest control treatment, such as application of Midada drugs and the like, should be immediately performed. And performing daily weeding, watering and conventional pest control. When the temperature is lower than 15 ℃, transparent nylon can be used for surrounding the periphery of the nursery area 23, the transparent nylon is between 90cm and 100cm in height, so that cold air can be shielded from direct blowing, the effects of heat preservation and moisture preservation can be achieved, and tender leaves are prevented from being frostbitten.

After the step (6), transplanting the sapling after the sapling grows to 1-2 m.

The seedlings can grow for 2-3 years and can grow to a height of 1-2 m, then transplanting treatment is carried out, for example, the seedlings are transplanted into a planting bag to become bag seedlings for standby, or the seedlings are directly transplanted to planting places in a ground planting mode, soil balls are kept as much as possible during transplanting, the damage to root systems is reduced, if propagation is carried out in China, the seedlings are transplanted in a period of 3-5 months, 3-5 months in China belong to spring and summer, and the seedling transplanting method is suitable for seedling transplanting growth. The longan tree is thinned in one year before the tree seedling is transplanted, so that the tree seedling is subjected to more sunlight irradiation and domestication, for example, when the tree seedling is transplanted in 3-5 months, the longan tree 10 is thinned in the period of 8-9 months in the last year, so that the light transmittance of the longan tree 10 can be increased, the effect of moderate temperature and light domestication of the tree seedling is achieved, and the survival rate of the tree seedling after the tree seedling is transplanted is improved.

In order to more effectively illustrate the technical solution of the present invention, the following description is made by means of a plurality of specific embodiments.

Examples

The propagation method of the Chinese careless flower seedlings comprises the following steps:

Wherein, time span: 6 months 2019 to 3 months 2021; location: shenzhen Luo lake forest fruit farm; 8 longan trees are used, and the tree ages are distributed: the soil around the selected longan tree was not applied with herbicide for three years for 4, 10, 2, 14, 2, 20 years, and all showed good vigor.

Seed collection is carried out on the central careless flowers 40 by adopting a collection net 50 from the late 6 th of 2018 to the late 7 th of 2018, and the collected naturally mature and pod-bearing seeds are shown in fig. 8. Chinese russian seeds with good quality (the good quality includes plump grains, natural maturity, no breakage and the like) are selected from the pods, and the total collection of 1200 grains of the natural mature Chinese russian seeds is carried out, wherein the physical diagram of the selected part of Chinese russian seeds is shown in figure 9. Then soaking the selected Chinese russian flower seeds in 300 times of 25% carbendazim wettable powder for 10min, and then transferring to a cool and ventilated direct-light-free place for airing for later use.

In the beginning of 8 months in 2018, numbering and pruning are carried out on 8 selected longan trees after the longan is harvested, the height between each longan tree and the nearest branch on the ground and the height between each longan tree and the nearest branch on the ground are 1.5m, weeding, soil turning and leveling are respectively carried out, soil samples are taken according to GB/T36197-2018 soil quality soil sampling technical guidelines, soil analysis is carried out on the soil samples, and the soil analysis results of each longan tree are averaged, wherein the results are shown in Table 1.

TABLE 1 summary of soil conditions in the vicinity of longan tree

According to the results of Table 1, a drain channel was dug for each soil of the longan tree, and the drain channel had an average width of 10cm and an average depth of 20cm.

The sterilizing 1200 Chinese russian seeds are all subjected to seed coat laceration treatment, and the positions of the seed coat laceration are shown as the Chinese russian seed physical objects in figure 10.

Then sowing is carried out in the nursery area delimited by each longan tree in the manner shown in table 2, wherein scratches face to soil during sowing, namely the scratches face to the sky, and watering is carried out after sowing.

Maintaining the temperature of the nursery area above 15 ℃ and the relative humidity above 35%, and timely performing weeding, pest killing and watering treatment. In winter, transparent nylon is adopted to surround the longan tree in the sowing area, and the average height of the transparent nylon is 100cm.

Table 2 chinese careless flower seed sowing parameter summary table

Wherein, fig. 11 and fig. 12 show the physical diagrams of propagating the Chinese russian flower seedlings under the 1# longan tree and the 5# longan tree to the seedlings of the second year, and as can be seen from fig. 11 and fig. 12, the branches and leaves of the Chinese russian flower seedlings are luxuriant and the growing situation is good.

From the data in table 2 and fig. 11 and 12, it can be seen that the propagation method of the chinese careless flower seedlings provided in this embodiment can achieve propagation of the chinese careless flower seedlings, and the propagation success rate reaches more than 60%, and the propagation success rate is good, so that the problems of the propagation of the existing chinese careless flower seedlings are effectively solved.

The foregoing description of the preferred embodiment of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. The propagation method of the Chinese careless flower seedlings is characterized by comprising the following steps:

selecting an area which is retracted from the edge of the first area by more than 1m towards the position of the root and stem of the longan tree as a second area;

Weeding, turning soil and leveling the second area to obtain a nursery area;

Controlling the temperature of the nursery area to be above 15 ℃ and the relative humidity to be above 35% after the seeds germinate for one year, and timely performing weeding, pest killing and watering treatment;

And (3) carrying out branch thinning treatment on the longan tree within one year before transplanting the tree seedlings so as to enable the tree seedlings to receive sunlight irradiation and domestication.

2. The method for propagating chinese careless flower seedlings of claim 1, further comprising forming a drain channel surrounding said longan tree at any position between an edge of said nursery region to an edge of said first region.

3. The propagation method of Chinese careless flower seedlings according to claim 1, wherein the distance between the branches of the longan tree closest to the ground and the nursery area is controlled to be 1.0 m-1.5 m;

4. The propagation method of Chinese careless flower seedlings according to claim 1, wherein the spacing between two adjacent seeds to be sown in the nursery area is 15 cm-30 cm;

5. The propagation method of Chinese careless flower seedlings according to any one of claims 1 to 4, characterized in that before sowing seeds to be sown in the nursery area, the quality ratio of humic acid carbon to humic acid carbon is 0.65-0.75, and the water content is 11% -15% in the surface soil of the nursery area, wherein the pH value is 5.6-7.0, the effective phosphorus concentration is 20 mg/kg-50 mg/kg, the effective zinc concentration is 0-5 mg/kg, the ammonium nitrate nitrogen content is 5 mg/kg-20 mg/kg, the humic substance content is 20 g/kg-50 g/kg.

6. The propagation method of Chinese russian flower seedlings according to any one of claims 1 to 4, further comprising transplanting seedlings to be grown to 1m to 2 m.

7. The method for propagating seedlings of chinese paperbush flower according to any one of claims 1 to 4, wherein said chinese paperbush flower seeds are derived from natural mature seeds of chinese paperbush flower.

8. The propagation method of Chinese russian flower seedlings according to claim 7, wherein the natural mature seeds of the Chinese russian flower are obtained by the following steps:

9. The propagation method of chinese careless flower seedlings according to any one of claims 1 to 4, wherein said seed to be sown is subjected to a seed coat laceration treatment.