Root growth promoting agent suitable for rooting of sliced ginger, ginger slicing seedling raising method and application

Abstract

The invention belongs to the technical field of crop seedling raising methods, and particularly discloses a root growth promoting agent suitable for rooting of sliced ginger, a ginger slicing seedling raising method and application. According to the method disclosed by the invention, before ginger planting, a root growth promoting agent is used, the root growth promoting agent comprises a 200-fold diluted solution of naphthalene B sodium nitrate, a 500-fold diluted solution of a microbial agent polyglutamic acid, a 500-fold diluted solution of plant rooting powder and a 10000-fold diluted solution of mepiquat chloride, and the four components realize synergistic interaction, so that the comprehensive indexes of the aboveground part of the ginger cut-block seedling, the plant growth amount and the seedling root system are optimal. According to the method, intensive early seedling raising is achieved through dicing, the ginger field planting time is shortened by more than 50 days, and crop rotation is facilitated; seedlings are neat and consistent, the root activity is high, the field survival rate and mechanical operation of the seedlings are improved, and the labor efficiency is improved. The technical method is simple, the production cost is low, the seedling rate is high, and direct economic benefits are embodied in production.

Description

Technical Field

[0001] The present invention belongs to the technical field of crop seedling raising methods, and particularly relates to a root promoting agent suitable for rooting of cut ginger, a ginger cut seedling raising method and applications thereof. Background Art

[0002] Seedling raising is a key link in vegetable planting. "Good seedlings mean half of the harvest." High-quality and strong seedlings are the basis for high-quality and high-yield vegetables. The safe, efficient cultivation and stable supply of vegetable seedlings are important guarantees for the healthy development of the vegetable industry (Li Shengli, Wu Guoxiu. Current situation, existing problems and suggestions of intensive vegetable seedling raising enterprises in Henan Province [J]. China Vegetables, 2023, (06): 1-5.). Intensive seedling production is the highest form of seedling technology development so far, with advantages such as saving seeds, uniform seedlings, low labor costs, and high cultivation efficiency (Chen Fei et al., 2021). At the same time, it is an important technology for realizing mechanized seedling transplanting, meeting the requirements of mechanized planting, and facilitating the realization of full-process mechanization and intensification (Miao Jinshan et al., 2019). For example, for cabbage (Wang Shenyun, Zeng Xiaoping, Ma Jinjun, Wang Hong, Yu Li, Li Jianbin. Mechanized cultivation technology of fruit cabbage "Sweetness 55" [J]. New Rural Technologies, 2022, (05): 16-18.), broccoli (Jing Youcui, Su Wei, Liu Shaogui, Yan Jin. Analysis of the application of mechanized production technology in the main links of open-field broccoli [J]. Agricultural Equipment & Technology, 2021, 47(05): 31-32.), chili peppers (Long Jianguo. Full-process mechanized cultivation technology of super chili peppers in the sand-gravel fields in the central part of Ningxia [J]. Popularization of Agricultural Machinery & Technology, 2024, (11): 16+19.), etc., intensive plug seedling raising ensures later mechanized planting, thus greatly reducing labor costs.

[0003] Since about 5,000 ginger plants are planted per mu, the labor requirement is high. Moreover, ginger sprouts slowly in the early stage and is sensitive to temperature. It takes 25 - 30 days from sowing to emergence, and 25 - 30 days from emergence to 5 - 6 leaves. During this period, the land lies idle for up to 50 - 60 days, which is sufficient for growing a crop of spring vegetables. Additionally, there is a lot of rain in April in the south, and ginger is planted in furrows. Continuous rainy weather is likely to cause the ginger seeds to rot in the ground. Secondly, rapeseed in the south is generally harvested in May, and traditional ginger planting is sown in April, so the rapeseed - ginger pattern is a bit out of season. Therefore, research on ginger seedling raising and transplanting is constantly being updated. For example, Liu Bo et al. (Liu Bo, Wu Xiong, Miao Jun, Liu Bingjiang, Yang Yanyan, Kong Suping, Gao Limin, Chen Wei, Zhang Yihui. A method for cultivating ginger by seedling raising and transplanting: Shandong Province, CN102342215B[P]. 2012 - 09 - 12) lifted ginger seedlings 15 - 20 cm high from the seedling raising bed according to conventional operations, without taking out the mother ginger, transplanted them into nutrient pots made of natural degradation materials, and after hardening off in the greenhouse or large arch shed for 5 - 10 days, transplanted them into the field together with the nutrient pots. The main advantage of this invention is to postpone the time of field planting of ginger. As we all know, the fibrous roots of ginger are adventitious roots generated from the base of the young buds, with a small number but relatively long, mainly responsible for absorbing water and nutrients. Breaking the ginger seedlings from the mother ginger easily causes damage to the fibrous roots and the breaking - off wounds are large, and the main transmission route of the most serious ginger blast disease during the ginger planting process is through wounds. Due to the above factors, "A Method for Cultivating Ginger by Seedling Raising and Transplanting" has not been widely applied in actual production.

[0004] "A Method for Raising Ginger Seedlings" (Wang Xiaojuan, Liu Xiaochen, Xu Zihao, Wang Yue. A method for raising ginger seedlings: Shandong Province, CN113557920A[P]. 2021 - 10 - 29) plants the sowing ginger pieces in a seedling raising pot or box. After sowing, through the artificial adjustment of temperature, light, and water, when the germination rate reaches 15%, transplantation is carried out. The advantages of this patent are to reduce the burden of manual work and save costs through high - density seedling raising and the control of temperature and humidity in the small environment, and at the same time greatly solve the early - stage diseases caused by the seeds and soil carrying diseases. However, when raising ginger seedlings in a seedling raising pot or box, the roots are prone to entanglement and breakage during the transplantation process, and mechanized sowing cannot be carried out. Secondly, transplanting when the germination rate reaches 15% will result in uneven emergence in the later stage of the field, which is not conducive to field management.

[0005] As an asexually propagated crop, ginger uses underground tubers as seeds for propagation. For small ginger, the seed amount per mu is 250 - 300 kg, and for large ginger, it is 400 - 500 kg. The seed amount per mu is large, resulting in a high cost of ginger seeds. Moreover, it is difficult to select a large quantity of disease-free seeds. Li Qingzhi et al. (Li Qingzhi, Shang Chunhua, Li Chengyong, Li Ling. A method for ginger plug seedling raising: Shandong Province, CN111820093A[P]. 2020 - 10 - 27) break or cut the ginger rhizomes, then sun the ginger, store it, germinate it, and raise seedlings in plug trays. This invention uses plug trays for ginger seedling raising, with intensive management during the seedling stage, controlling the small environment of water, fertilizer, temperature, and humidity, greatly reducing the seed amount, fertilizer, irrigation, and heat preservation facilities. At the same time, this ginger plug seedling raising method is particularly conducive to controlling soil-borne diseases such as ginger blast and ginger stem rot, greatly solving the early diseases caused by diseased seeds and soil, reducing the drug cost, and also greatly reducing the labor and material costs. However, during the process of cuttage seedling raising, the size and cutting method of ginger cuttings affect the plant height, stem diameter, number of branches, fresh root weight, fresh rhizome weight, root length, surface area, number of root tips, etc. of ginger seedlings (Gu Jinchi. Research on ginger cutting seedling raising technology [D]. Supervisor: Xu Kun. Shandong Agricultural University, 2022). Also, due to the different germination of dormant buds and roots in different parts of ginger, the growth of seedlings in the later stage is uneven, increasing the difficulty of field management.

[0006] In view of the above problems, the present invention provides a root-promoting agent for promoting the rooting of cut ginger. By treating the cut ginger seeds with the agent, the emergence is neat and consistent, the roots are vigorous, and the uniformity and survival rate of the cut ginger seedlings are improved. This technical method is simple and has a low production cost, showing direct economic benefits in production. Summary of the Invention

[0007] The purpose of the present invention is to provide a root-promoting agent suitable for the rooting of cut ginger, which effectively improves the uniformity and root vitality of the cuttage seedlings.

[0008] Another purpose of the present invention is to provide a method for raising cut ginger seedlings using the above root-promoting agent. The method of the present invention is conducive to mechanized sowing and field management, with a high survival rate of field seedlings, saving costs and labor, and being suitable for large-scale promotion.

[0009] Another purpose of the present invention is to provide the application of the above root-promoting agent in ginger cultivation.

[0010] To achieve the above purposes, the present invention takes the following technical measures:

[0011] A rooting promoter suitable for rooting of cut ginger, comprising: naphthylacetic acid-sodium nitrophenolate, microbial agent polyglutamic acid, plant rooting powder and mepiquat chloride. Each liter of the rooting promoter comprises the following components: 150-250 times liquid of naphthylacetic acid-sodium nitrophenolate, 400-600 times liquid of microbial agent polyglutamic acid, 400-600 times liquid of plant rooting powder and 8000-12000 times liquid of mepiquat chloride.

[0012] For the above-mentioned rooting promoter, preferably, each liter of the rooting promoter comprises: 200 times diluted liquid of naphthylacetic acid-sodium nitrophenolate, 500 times diluted liquid of microbial agent polyglutamic acid, 500 times diluted liquid of plant rooting powder and 10000 times diluted liquid of mepiquat chloride.

[0013] Method for raising seedlings of cut ginger by using the above-mentioned rooting promoter:

[0014] 1. Seed selection: Ginger is dried in the sun for 2-3 days before treatment. During the drying process, rotten, shriveled, diseased and damaged ginger are removed, and ginger that is plump, shiny in color, disease-free and injury-free is selected as the ginger seed.

[0015] 2. Cutting and sunning ginger: The size of the cut pieces is controlled at 18-22 g, the cut surface should be as small as possible, and at least 1 complete dormant bud should be retained for sprouting; after cutting, it is sunned under the condition of 18-25 °C, and medicine is sprayed during the sunning process; each liter of the medicine used comprises: 800-1200 times liquid of 30% metalaxyl-M, 600-1000 times liquid of 30% succinic acid copper, 3000-5000 times liquid of 60% imidacloprid and 5000-8000 times liquid of Dikegulac sodium, and the ginger seeds are sprayed; the spraying amount is controlled at 50-80 mL / m 2 , with the surface of the ginger seeds being evenly moist but not dripping.

[0016] 3. Temperature difference sprouting: The sunned ginger pieces are bagged for sprouting. The sprouting is divided into three stages. The temperature in the first 7 days before sprouting is 22-26 °C, the temperature in the middle 7 days is 24-28 °C, and the temperature in the last 7 days is 20-24 °C.

[0017] 4. Substrate preparation: Vermiculite: peat is mixed according to a volume ratio of 1:1-2, and 0.05-0.15% by mass of metalaxyl-M is prepared and added to the substrate to make its humidity 70-90%.

[0018] 5. Ginger seed treatment: The sprouted ginger seeds are soaked in the aqueous solution of the rooting promoter for 30-40 min.

[0019] 6. Plug tray seedling raising: It is advisable to use a plug tray with 18 - 24 holes, and the depth of each hole is 6 - 7 cm. First, add 2 - 3 cm of substrate to the bottom of the plug tray. Place the ginger pieces fished out from the rooting promoter aqueous solution with the apical buds facing upwards in the plug tray, cover the soil until it is flush with the top of the hole, and then pour sufficient water. In spring, the temperature is low. Before seedling raising, pre - heat the water in the greenhouse pool in advance so that the water temperature is 18 - 22 °C, and spray warm water to pour sufficient water.

[0020] 7. Seedling stage management: The main tasks before emergence are to keep moisture and increase temperature. In the greenhouse, maintain the average temperature at 26 - 30 °C through methods such as ground heating wires, and the minimum temperature should not be lower than 18 °C. Manage according to the principle of watering when dry and not watering when wet for 45 - 55 days.

[0021] The protection scope of the present invention also includes the application of the above - mentioned rooting promoter in cultivating ginger seedlings.

[0022] Compared with the conventional planting technology, the present invention has the following advantages and effects:

[0023] 1. Root system directional induction technology: Before planting ginger, the applicant of the present invention uses a self - made rooting promoter: 1 - naphthaleneacetic acid sodium - sodium nitrophenolate diluted 200 times, microbial inoculant polyglutamic acid diluted 500 times, plant rooting powder diluted 500 times, and mepiquat chloride diluted 10,000 times. Synergistic interaction is achieved among the four components, making the comprehensive indexes of the above - ground part, plant growth amount, and seedling - raising root system of ginger cuttings reach the optimal level.

[0024] Among them, the plant rooting powder is a surfactant composed of a mixture of plant extracts - syringone and isoleucine, which promotes rooting; the microbial inoculant polyglutamic acid is compounded by Bacillus subtilis, Bacillus mucilaginosus, and Bacillus amyloliquefaciens, which has a certain protective effect on the root system of plants. Polyglutamic acid will form a protective film on the roots of plants, thereby protecting the root hairs of plants; 1 - naphthaleneacetic acid sodium - sodium nitrophenolate is compounded by α - naphthaleneacetic acid sodium and sodium nitrophenolate, which is used to regulate the growth of ginger; mepiquat chloride can increase the number and vitality of roots.

[0025] 2. The applicant further proposed a seedling - raising method for ginger cuttings for the rooting promoter of the present invention: First, break through the traditional limit of ginger piece size (conventional ≥50 g), accurately control the weight of the cuttings at 20 ± 2 g and retain a single bud, achieving a 75% - 80% reduction in the amount of seeds used (100 kg per mu vs 400 - 500 kg in the traditional method). Second, by exposing the internal lesions (such as browning, abnormal vascular bundles) of the ginger meat through the cut surface of the cuttings, conduct secondary screening. The health rate is 100% when viewed from the inside of the ginger pieces, thus effectively reducing the incidence of late - stage field diseases caused by diseased seedlings. Third, the miniaturized cuttings increase the utilization rate of the unit volume of the germination room by 3 - 4 times, and the supporting three - dimensional shelf can realize industrialized germination.

[0026] 3. Three-dimensional disease prevention and control combination: Innovatively integrate 30% metalaxyl-M + oxadixyl (for controlling soil-borne fungi such as Fusarium), 30% succinic acid copper (for preventing and controlling bacteria such as Ralstonia solanacearum), and 60% imidacloprid (for blocking aphid vector transmission), achieving triple protection against fungi / bacteria / pests, and basically no diseases occur at the seedling stage. Introduce the plant stress resistance activator Bihu (0.136% gibberellic acid + indoleacetic acid + brassinolide), enhance the stress resistance of ginger rhizomes by regulating the endogenous hormone level, and escort for reducing the disease incidence rate.

[0027] 4. Synergistic technology of systemic protection and strong seedling: Precisely add metalaxyl-M + oxadixyl to the substrate, and form a double protection barrier of roots - substrate through its strong systemic property. The duration of bactericidal activity is extended to 45 - 60 days (conventional treatment ≤ 30 days), and the prevention and control rate of soil-borne diseases such as ginger blast and stem rot is greatly improved. At the same time, through metabolic regulation, it promotes early emergence and strong emergence of ginger.

[0028] 5. Mechanization adaptation technology: Place the ginger rhizomes fished out from the rooting agent aqueous solution with the apical buds facing upwards in the plug trays, ensuring that the emergence verticality > 85%, meeting the requirements of mechanized planting. Plug tray seedling raising, with a transplanting efficiency of 2000 plants / hour·person. Brief Description of the Drawings

[0029] Figure 1 It is a schematic diagram of cut ginger.

[0030] Figure 2 It is the sowing of cut ginger.

[0031] Figure 3 It is the growth of cut ginger seedlings. Detailed Description of the Invention

[0032] For the technical solutions described in the present invention, unless otherwise specified, they are all conventional solutions in the art; for the reagents or materials, unless otherwise specified, they are all from commercial channels. In this embodiment, Laifeng ginger is taken as an example for illustration, and the method of the present invention can also be used as a rooting agent for cuttings of other varieties of ginger.

[0033] The experiments in the embodiments of the present invention were carried out in the vegetable base of the Key Laboratory of Alpine Vegetable Ecological Cultivation of the Ministry of Agriculture and Rural Affairs.

[0034] Example 1:

[0035] When exploring the formula of the ginger rooting agent in the present invention, the following method is adopted in all cases. In this embodiment, the variety of ginger used is Laifeng ginger.

[0036] A method for cultivating ginger using cut ginger includes the following steps:

[0037] 1. Seed selection: Ginger is sun-dried for 2 - 3 days before treatment. During the sun-drying process, rotten, shrunken, diseased, and damaged ginger is removed, and ginger that is plump, shiny in color, and free from disease and injury is selected as the seed ginger.

[0038] 2. Cutting and sun-drying ginger: The size of the cut ginger pieces is controlled at 18 - 22 g, and the cut surface should be as small as possible. Each cut piece should retain at least 1 complete dormant bud for sprouting; after cutting, it is sun-dried for 1 - 2 days at a temperature of 18 - 25 °C. After sun-drying, when the surface of the ginger is dry, a medicament spray is carried out, and the entire ginger surface is wetted; after the medicament dries, the ginger is turned over and the medicament is sprayed again until the ginger surface is wetted; the medicament used contains per liter: 1000 - fold solution of 30% metalaxyl - manganese, 800 - fold solution of 30% succinic acid copper, 4000 - fold solution of 60% imidacloprid, and 6500 - fold solution of BiHuo. The spraying amount is controlled at 50 - 80 mL / m 2 , so that the surface of the seed ginger is evenly moist but does not drip.

[0039] 3. Temperature difference sprouting: The sun-dried ginger pieces are bagged for sprouting. The sprouting is divided into three stages. By artificially controlling, the temperature in the first 7 days is 22 - 26 °C, the temperature in the middle 7 days is 24 - 28 °C, and the temperature in the later 7 days is 20 - 24 °C; when the ginger buds are thick and short, with a blunt top and no roots emerging: when the length is 0.5 - 1.0 cm and the thickness is 0.5 - 1.0 cm, it can be sown.

[0040] 4. Substrate preparation: Vermiculite∶peat moss is mixed in a volume ratio of 1∶1 - 2, and 0.10% (mass percentage) of metalaxyl - manganese is prepared and added to the substrate to make its humidity 80%.

[0041] 5. Treatment of seed ginger: The sprouted seed ginger is soaked in the aqueous solution of root-promoting agent for 35 minutes.

[0042] 6. Plug tray seedling raising: It is advisable to use a plug tray with 18 - 24 holes, and the depth of each hole is 6 - 7 cm. First, add 2 - 3 cm of substrate to the bottom of the plug tray. The ginger pieces fished out from the aqueous solution of root-promoting agent are placed in the plug tray with the apical buds facing up, covered with soil until it is flush with the hole top, and then watered thoroughly. In spring, when the temperature is low, the pool water in the greenhouse is sun-dried in advance to a temperature of 18 - 22 °C before seedling raising, and warm water is sprayed to water thoroughly.

[0043] 7. Seedling stage management: The main task before emergence is to keep moisture and increase temperature. In the greenhouse, the air temperature is maintained at about 26 - 30 °C by methods such as ground heating wires, with the lowest air temperature limited to 18 °C, and it is managed by watering when dry and not watering when wet for 45 - 55 days. When the plant height is about 30 cm, the stem diameter is about 5.0 cm, and the seedling has 5 - 7 leaves, it is the best time for transplanting. At this time, the roots fill the hole, and the roots can hold the substrate tightly without scattering. At this time, the transplanting slow seedling stage is short and has little impact on growth. Before transplanting, the above-ground part, plant growth amount, and seedling roots of the ginger cuttings for seedling raising are detected.

[0044] Example 2:

[0045] Growth of ginger cultivated by the method described in Example 1 using different root-promoting agents in the prior art:

[0046] For the usage concentrations in Table 1, taking 2000 times as an example, if it is a liquid, 1 mL of the liquid is dissolved in 1999 mL of water; if it is a microbial agent or a solid, 1 g is weighed and dissolved in 1999 mL of water.

[0047] Brief table of active ingredients, manufacturers and usage concentrations of different root-promoting agents in Table 1

[0048]

[0049]

[0050] Using the root-promoting agents described in Table 1 and the method described in Example 1, cut ginger was cultivated, and the results are shown in Tables 2 - 4: It can be seen from Table 2 that among the 16 selected root-promoting agents, the leaf length of the plants treated with 92% chitosan oligosaccharide was 17.32 cm, and the stem diameter of the plants treated with the microbial agent polyglutamic acid was 6.47 mm, which were significantly different from the leaf length of 15.40 cm and the stem diameter of 4.82 mm of the blank control. The other indexes such as plant height, leaf width and plant width were not significantly different from the blank control. Indolebutyric acid inhibited plant height, leaf length, leaf width and plant width.

[0051] Table 2 Effects of different root-promoting agents on the above-ground part of cut ginger seedlings

[0052]

[0053]

[0054] It can be seen from Table 3 that among the 16 selected root-promoting agents, those that inhibited the fresh weight of leaves were 2,4-epibrassinolide, naphthylacetic acid-sodium nitrophenolate, sodium nitrophenolate amide, mepiquat chloride, indolebutyric acid and 25% polyglutamic acid powder; those that inhibited the fresh weight of stems were naphthylacetic acid-sodium nitrophenolate, mepiquat chloride, indolebutyric acid and 25% polyglutamic acid powder; those that inhibited the fresh weight of roots were sodium nitrophenolate amide and mepiquat chloride.

[0055] Table 3 Effects of different root-promoting agents on the growth of cut ginger seedlings

[0056]

[0057] It can be seen from Table 4 that among the 16 selected root-promoting agents, the root surface area of the ginger seedlings treated with compound nitrophenolate was 170.65 cm 2 , and the number of root tips was 3003.20, which were significantly different from the root surface area of 125.84 cm 2 and the number of root tips of 1876.60 of the blank control.

[0058] Table 4 Effects of Different Root Promoters on the Roots of Ginger Cubes for Seedling

[0059]

[0060] Based on the above single-factor studies, we can see that the effects of different root promoters on ginger cube seedlings are different. The experimental results are not as we expected, that is, using root promoters will definitely promote root growth and plant growth. Naphthaleneacetic acid-sodium nitrophenolate inhibits fresh leaf weight and fresh stem weight, mepiquat chloride inhibits fresh leaf weight, fresh stem weight and fresh root weight, and 24-epibrassinolide, naphthaleneacetic acid-sodium nitrophenolate and rooting powder inhibit root length, root surface area and root tip number.

[0061] Example 3:

[0062] Growth conditions of ginger cultivated by the applicant's root promoters with different components using the method described in Example 1:

[0063] When screening the compounding formula, the applicant conducted a large number of experiments. Some compoundings are shown in Table 5 to illustrate the technical effects of the present invention.

[0064] Using the root promoters described in Table 5 and the method described in Example 1 to cultivate ginger cubes, the results are shown in Tables 6 - 8:

[0065] Table 5 lists the compounding methods of the compound root promoters. The root promoters used are produced by the manufacturers in Table 1, and the concentrations used are the concentrations marked in Table 1. Taking No. 22 as an example, that is, each liter of the root promoter includes: 200-fold solution of naphthaleneacetic acid-sodium nitrophenolate, 500-fold solution of microbial agent polyglutamic acid, 500-fold solution of plant rooting powder and 10,000-fold solution of mepiquat chloride.

[0066] Table 5 Compoundings of Different Root Promoters

[0067]

[0068] It can be seen from Table 6 that among various compound root promoters, the plant of naphthaleneacetic acid-sodium nitrophenolate + microbial agent polyglutamic acid + plant rooting powder + mepiquat chloride is the thickest, reaching 5.72 cm. It can be known from Table 2 that mepiquat chloride alone does not promote the stem thickness of ginger seedlings.

[0069] Table 6 Effects of Different Root Promoters on the Above-ground Parts of Ginger Cubes for Seedling

[0070]

[0071] It can be seen from Table 7 that various compound root promoters have little effect on the indexes of fresh leaf weight, fresh stem weight, fresh root weight and fresh rhizome weight of ginger seedlings, and the differences between each treatment and the control are not significant.

[0072] Table 7 Effects of Different Root Promoters on the Growth Quantity of Ginger Cubes for Seedling

[0073]

[0074] As can be seen from Table 8, the root length and root surface area of ​​the treatment of sodium nitrate naphthalene + microbial agent polyglutamic acid + plant rooting powder are not as good as the blank control. As can be seen from Table 4, mepiquat has no promoting effect on the root system of ginger seedlings, but the mixed treatment of sodium nitrate naphthalene + microbial agent polyglutamic acid + plant rooting powder + mepiquat is significantly different from other treatments and controls. At the same time, we can see from Table 2 that sodium nitrophenolate promotes stem thickness, and from Table 4, sodium nitrophenolate performs best in promoting ginger root length, root surface area and root tip number, but the effect of sodium nitrophenolate + microbial agent polyglutamic acid + plant rooting powder + mepiquat in promoting ginger rooting is not as good as sodium nitrate naphthalene + microbial agent polyglutamic acid + plant rooting powder + mepiquat. From Table 1, we know that the main components of sodium nitrophenolate are sodium o-nitrophenolate 0.6%, sodium p-nitrophenolate 0.9%, and sodium 5-nitro-o-methoxyphenol 0.3%; the main components of sodium naphthalene ethyl nitrate are sodium o-nitrophenol 0.6%, sodium p-nitrophenol 0.9%, naphthaleneacetic acid 1.2%, and sodium 2,4-dinitrophenol 0.15%. Sodium 5-nitro-o-methoxyphenol is a cell activator that can be used to regulate plant growth. It has a strong permeability. It can quickly enter the plant body, promote the flow of plant protoplasm, accelerate plant rooting and germination, and promote growth. Naphthaleneacetic acid can promote cell division and expansion, induce the formation of adventitious roots, and promote plant rooting or transplanting. The function of sodium 2,4-dinitrophenol is that it can quickly penetrate into the plant body when sprayed on the leaves, and promote the root system to absorb nutrients. However, judging from the efficacy of the agents, 0.3% sodium 5-nitro-o-methoxyphenol is better than naphthylacetic acid in promoting root growth, but sodium 2,4-dinitrophenol may have played a synergistic role in the compound, increasing the effect of the microbial agent polyglutamic acid + plant rooting powder + mepiquat. The final result was that the mixed treatment of sodium naphthaleneethyl nitrate + microbial agent polyglutamic acid + plant rooting powder + mepiquat had the best effect.

[0075] Table 8 Effects of different root promoters on the root system of ginger cuttings and seedlings

[0076]

[0077]

Claims

1. A root-promoting agent suitable for rooting of cut ginger, comprising: Sodium naphthalene ethyl nitrate, microbial agent polyglutamic acid, plant rooting powder and mepiquat. The root promoting agent comprises the following components per liter: 150-250 times solution of sodium naphthalene ethyl nitrate, 400-600 times solution of microbial agent polyglutamic acid, 400-600 times solution of plant rooting powder and 8000-12000 times solution of mepiquat.

2. The root promoting agent according to claim 1, wherein each liter of the root promoting agent comprises: Sodium naphthalene ethyl nitrate diluted 200 times, microbial agent polyglutamic acid diluted 500 times, plant rooting powder diluted 500 times and mepiquat diluted 10,000 times.

3. A method for growing ginger seedlings by cutting ginger pieces using the root promoting agent according to claim 1, comprising the following steps: 1) Seed selection: Ginger should be air-dried for 2-3 days before processing. During the drying process, remove the rotten, shrunken, diseased and injured ginger, and select the plump, bright, disease-free and uninjured ginger as the ginger seeds; 2). Cut ginger into pieces and dry them: The size of the pieces should be controlled at 18-22g, and the damage surface should be as small as possible. At least one complete dormant bud should be retained in the pieces for germination. After cutting, dry the pieces at a temperature of 18-25℃, and spray the chemicals during the drying process. The chemicals used per liter include: Spray ginger seeds with 800-1200 times dilution of 30% oxadiazine, 600-1000 times dilution of 30% copper succinate, 3000-5000 times dilution of 60% imidacloprid and 5000-8000 times dilution of Bihu. The spraying amount should be controlled at 50-80 mL / m 2 , the surface of the ginger seeds should be evenly moist but not dripping; 3). Temperature difference germination: the dried ginger pieces are bagged for germination. The germination is divided into three stages. The temperature is 22-26℃ for the first 7 days, 24-28℃ for the middle 7 days, and 20-24℃ for the last 7 days. 4). Substrate preparation: Vermiculite: peat in a volume ratio of 1:1-2, prepare 0.05-0.15% by mass of metalaxyl, add it to the substrate to make its humidity 70-90%; 5). Ginger seed treatment: Soak the sprouted ginger seeds in a root-promoting agent solution for 30-40 minutes; 6). Plug tray seedling raising: A plug tray with 18-24 holes is suitable, and the depth of each hole is 6-7cm. First, add 2-3cm thick substrate at the bottom of the plug tray, and place the ginger pieces fished out of the root-promoting agent aqueous solution in the plug tray with the top bud facing upwards. Cover the soil to the same level as the top of the hole and then water it thoroughly. The temperature is low in spring, so before raising the seedlings, the water in the warm net room should be dried in advance at a temperature of 18-22℃, and then spray it with warm water to water it thoroughly; 7). Management during the seedling stage: The main task before emergence is to retain moisture and increase temperature. The average temperature in the greenhouse is maintained at 26-30°C through geothermal lines and other methods, and the minimum temperature is not lower than 18°C. Management is carried out for 45-55 days depending on dryness and wetness.

4. The method according to claim 3, characterized in that: The agent in step 2) is: the agent used contains: 1000 times of 30% oxadiazine solution, 800 times of 30% copper succinate solution, 4000 times of 60% imidacloprid solution and 6500 times of Bihu solution per liter.

5. Use of the root promoting agent according to claim 1 in cultivating ginger seedlings.

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