Viscous seed coating agent for desert aerial seeding and application thereof

Abstract

The invention provides a viscous seed coating agent for desert aerial seeding and application thereof, and belongs to the technical field of ecological restoration. According to the coating agent, seeds serve as a core, and an inner-layer nutrition matrix and an outer-layer mucus layer are sequentially formed from inside to outside; the inner layer comprises a water-retaining agent, a binder and a microbial agent of nitrogen-fixing bacteria and phosphate solubilizing bacteria; the outer layer comprises an Arabic gum / natto resin adhesive, gibberellic acid and indolebutyric acid plant growth regulator and a bitter taste element / capsaicin animal repellent. Seeds are firmly attached to the sand surface through the outer-layer viscous substance, and sand blowing loss is reduced; the inner water retention layer and the microbial agent continuously supply water and fertilizer, so that the seed germination and seedling survival capability is improved; the outer layer repellent reduces animal pecking, and plasma activation further promotes germination. The coating agent can significantly improve the retention rate, the germination rate and the seedling survival rate of desert aerial seeding seeds, and is suitable for ecological restoration of xerophytes such as caragana microphylla.

Description

Technical Field

[0001] This invention relates to the field of ecological restoration, specifically to a sticky seed coating agent for aerial seeding in deserts and its application. Background Technology

[0002] Desertification is a major global ecological challenge. Aerial seeding, with drone seeding technology at its core, has become a key means of ecological restoration in deserts and Gobi due to its advantages such as high efficiency, wide coverage, and adaptability to complex terrain. However, in the harsh desert environment, conventional aerial seeding technology faces a series of technical bottlenecks, resulting in low seed survival rates and ineffective ecological restoration.

[0003] First, desert regions are characterized by strong winds and highly mobile sand dunes. Conventional seeds are lightweight and have smooth surfaces, making them easily blown away from the target area after sowing, or failing to adhere effectively to the sand surface, resulting in a large number of seeds being ineffectively buried or scattered. Second, exposed seeds are a food source for desert animals such as birds and rodents. After aerial sowing, the seeds are largely pecked at, directly causing resource waste and restoration failure.

[0004] To improve the effectiveness of aerial seeding, there is an urgent need to develop a new type of sticky seed coating agent that can significantly improve the efficiency and success rate of ecological restoration. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a sticky seed coating agent for aerial seeding in deserts and its application, as detailed below: A sticky seed coating agent for aerial seeding in deserts, wherein the coating agent has a seed as its core, and forms an inner nutrient substrate and an outer mucilage layer from the inside out; wherein: The inner nutrient matrix contains a water-retaining agent, a binder, and a microbial agent; The outer mucus layer contains adhesives, plant growth regulators, and animal repellents.

[0006] Preferably, in the inner nutrient matrix, the water-retaining agent is cross-linked potassium polyacrylate, the binder is sodium alginate, and the microbial agent is nitrogen-fixing bacteria and phosphate-solubilizing bacteria.

[0007] Preferably, the mass ratio of water-retaining agent: binder: microbial agent is 2-4:1:0.5.

[0008] Preferably, the mass ratio of nitrogen-fixing bacteria to phosphate-solubilizing bacteria is 2-3:1; the microbial inoculant concentration is not less than 1×10⁻⁶. 8 CFU / g.

[0009] Preferably, the adhesive in the outer mucus layer is gum arabic and natto resin; the animal repellent is cucurbitacin and capsaicin; and the plant growth regulator includes gibberellic acid and indolebutyric acid.

[0010] Preferably, in the outer mucus layer, the mass ratio of the adhesive to the animal repellent is 3-5:1; the mass ratio of gum arabic to natto resin is 2-3:1; and the mass ratio of bitter glycoside to capsaicin is 1:1.

[0011] Preferably, the concentration of gibberellic acid added to the outer mucus layer is 40-60 ppm, the concentration of indolebutyric acid added to the outer mucus layer is 15-25 ppm, the concentration of bitter glycoside is 0.1%-0.3%, and the concentration of capsaicin is 0.05%-0.1%.

[0012] Preferably, the seeds are pre-treated with plasma before the coating agent is formed. The specific treatment method is as follows: the seeds are placed in a plasma seed treatment machine with a power of 50W and a treatment time of 3 minutes. The high-energy particles of the plasma activate the physiological activity of the seeds and improve the germination rate.

[0013] Preferably, the seed is Caragana microphylla.

[0014] On the other hand, the present invention provides the application of the aforementioned sticky seed coating agent for desert ecological restoration.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The adhesive seed coating agent provided by this invention has an outer mucilage layer that forms an adhesive protective layer on the seed surface. During desert aerial seeding, even in the face of strong winds and highly mobile sand dunes, the seeds can firmly adhere to the surface of the sand and gravel with the help of this adhesive substance, making them less likely to be blown away from the target area by the wind. This greatly reduces the situation where seeds are ineffectively buried or blown away due to failure to adhere effectively, and improves the seed survival rate in the target area. At the same time, the animal repellent added to the outer mucilage layer has a strong repellent effect on birds, rodents and other animals in the desert. After aerial seeding, animals will reduce pecking at the seeds because they dislike the smell of these repellents, thereby effectively protecting seed resources, avoiding resource waste and repair failure caused by excessive pecking of seeds, and improving seed survival rate. 2. The adhesive seed coating agent provided by this invention contains cross-linked potassium polyacrylate in the inner nutrient matrix, which has a strong water absorption and retention capacity, providing necessary moisture for seeds in arid desert environments, alleviating seed water shortage problems, and promoting seed germination and seedling growth; sodium alginate not only helps stabilize the inner structure, but may also provide certain nutrients and growth environment support for the seeds; nitrogen-fixing bacteria can convert nitrogen in the air into nitrogen that plants can use, and phosphorus-solubilizing bacteria can convert insoluble phosphorus in the soil into available phosphorus that plants can absorb, providing more sufficient nutrients for seed growth and promoting rapid seed germination and root development; 3. The viscous seed coating agent provided by this invention contains gibberellic acid in the outer mucilage layer, which promotes cell elongation, and indolebutyric acid, which mainly promotes root growth. The combination of the two can synergistically promote the directional development of the seed radicle, making the seedlings grow stronger and improving their adaptability and survival rate in harsh desert environments. At the same time, the seeds are pre-treated with plasma before the coating agent is formed, which changes the physicochemical properties of the seed surface, activates the physiological activity inside the seed, breaks seed dormancy, and improves the germination potential and germination rate, providing more vigorous seedlings for ecological restoration. 4. Before the coating agent is formed, the seeds of this invention are pre-treated with plasma activation (power 50W, treatment for 3 minutes). The high-energy plasma particles can change the physicochemical properties of the seed surface, activate the physiological activity inside the seed, break seed dormancy, improve seed germination potential and germination rate, and provide more vigorous seedlings for ecological restoration. Attached Figure Description

[0016] Figure 1 : A schematic diagram of the structure of the viscous seed coating agent of the present invention; Figure 2 Photo of coated seeds being sown in the Hunshandake Desert; Figure 3 Morphological diagram of coated seeds during germination after field sowing in the Hunshandake Desert; Figure 4 Morphological diagram of seedling growth stages of coated seeds. Detailed Implementation

[0017] Example 1 A sticky seed coating agent for aerial seeding in deserts, wherein the coating agent has a seed as its core, and forms an inner nutrient substrate and an outer mucilage layer from the inside out; wherein: The inner nutrient matrix contains a water-retaining agent, a binder, and a microbial agent; The outer mucus layer contains adhesives, plant growth regulators, and animal repellents.

[0018] Furthermore, in the inner nutrient matrix, the water-retaining agent is cross-linked potassium polyacrylate, the binder is sodium alginate, and the microbial agents are nitrogen-fixing bacteria and phosphate-solubilizing bacteria.

[0019] Furthermore, the mass ratio of the water-retaining agent: binder: microbial agent is 2:1:0.5.

[0020] Furthermore, the mass ratio of nitrogen-fixing bacteria to phosphate-solubilizing bacteria is 2:1; the microbial inoculant has a bacterial concentration of not less than 1×10⁻⁶. 8 CFU / g.

[0021] Furthermore, in the outer mucus layer, the adhesive is gum arabic and natto resin; the animal repellent is cucurbitacin and capsaicin; and the plant growth regulator includes gibberellic acid and indolebutyric acid.

[0022] Furthermore, in the outer mucus layer, the mass ratio of the adhesive to the animal repellent is 3:1; the mass ratio of gum arabic to natto resin is 2:1; and the mass ratio of bitter glycoside to capsaicin is 1:1.

[0023] Furthermore, the concentration of gibberellic acid added to the outer mucus layer is 40 ppm, the concentration of indolebutyric acid added to the outer mucus layer is 15 ppm, the concentration of bitter glycoside is 0.1%, and the concentration of capsaicin is 0.05%.

[0024] Furthermore, the seeds are pre-treated with plasma activation before the coating agent is formed.

[0025] Furthermore, the seed is *Caragana microphylla*.

[0026] Example 2 A sticky seed coating agent for aerial seeding in deserts, wherein the coating agent has a seed as its core, and forms an inner nutrient substrate and an outer mucilage layer from the inside out; wherein: The inner nutrient matrix contains a water-retaining agent, a binder, and a microbial agent; The outer mucus layer contains adhesives, plant growth regulators, and animal repellents.

[0027] Furthermore, in the inner nutrient matrix, the water-retaining agent is cross-linked potassium polyacrylate, the binder is sodium alginate, and the microbial agents are nitrogen-fixing bacteria and phosphate-solubilizing bacteria.

[0028] Furthermore, the mass ratio of the water-retaining agent: binder: microbial agent is 4:1:0.5.

[0029] Furthermore, the mass ratio of nitrogen-fixing bacteria to phosphate-solubilizing bacteria is 3:1; the microbial inoculant has a bacterial concentration of not less than 1×10⁻⁶. 8 CFU / g.

[0030] Furthermore, in the outer mucus layer, the adhesive is gum arabic and natto resin; the animal repellent is cucurbitacin and capsaicin; and the plant growth regulator includes gibberellic acid and indolebutyric acid.

[0031] Furthermore, in the outer mucus layer, the mass ratio of the adhesive to the animal repellent is 5:1; the mass ratio of gum arabic to natto resin is 3:1; and the mass ratio of bitter glycoside to capsaicin is 1:1.

[0032] Furthermore, the concentration of gibberellic acid added to the outer mucus layer is 60 ppm, the concentration of indolebutyric acid added to the outer mucus layer is 25 ppm, the concentration of bitter glycoside is 0.3%, and the concentration of capsaicin is 0.1%.

[0033] Furthermore, the seeds are pre-treated with plasma activation before the coating agent is formed.

[0034] Furthermore, the seed is *Caragana microphylla*.

[0035] Example 3 A sticky seed coating agent for aerial seeding in deserts, wherein the coating agent has a seed as its core, and forms an inner nutrient substrate and an outer mucilage layer from the inside out; wherein: The inner nutrient matrix contains a water-retaining agent, a binder, and a microbial agent; The outer mucus layer contains adhesives, plant growth regulators, and animal repellents.

[0036] Furthermore, in the inner nutrient matrix, the water-retaining agent is cross-linked potassium polyacrylate, the binder is sodium alginate, and the microbial agents are nitrogen-fixing bacteria and phosphate-solubilizing bacteria.

[0037] Furthermore, the mass ratio of the water-retaining agent: binder: microbial agent is 3:1:0.5.

[0038] Furthermore, the mass ratio of nitrogen-fixing bacteria to phosphate-solubilizing bacteria is 2.5:1; the microbial inoculant has a bacterial concentration of not less than 1×10⁻⁶. 8 CFU / g.

[0039] Furthermore, in the outer mucus layer, the adhesive is gum arabic and natto resin; the animal repellent is cucurbitacin and capsaicin; and the plant growth regulator includes gibberellic acid and indolebutyric acid.

[0040] Furthermore, in the outer mucus layer, the mass ratio of the adhesive to the animal repellent is 4:1; the mass ratio of gum arabic to natto resin is 2.5:1; and the mass ratio of bitter glycoside to capsaicin is 1:1.

[0041] Furthermore, the concentration of gibberellic acid added to the outer mucus layer is 50 ppm, the concentration of indolebutyric acid added to the outer mucus layer is 20 ppm, the concentration of bitter glycoside is 0.2%, and the concentration of capsaicin is 0.08%.

[0042] Furthermore, the seeds are pre-treated with plasma activation before the coating agent is formed.

[0043] Furthermore, the seed is *Caragana microphylla*.

[0044] Comparative Example 1 The difference between this comparative example and Example 3 is that the seeds were not activated by plasma.

[0045] Comparative Example 2 The difference between this comparative example and Example 3 is that the seeds were not coated.

[0046] Experimental Section Ten seeds of *Caragana microphylla* prepared in Example 3, Comparative Examples 1 and 2 were planted in the Hunshandake Desert (see Example 3 for seed morphology). Figure 2 ), and continuously monitor and record its germination and seedling growth process. During the initial observation phase of the experiment (day 7), 6 out of 10 coated seeds in Example 3 successfully germinated. The morphology of some germinated seeds is shown in [the image / description]. Figure 3 During the same period, Comparative Example 1 had 4 germinated plants, while Comparative Example 2, due to the lack of seed coating, had a seed survival rate of only 2 seeds and 1 germinated plant.

[0047] As the experiment progressed, 7 small seedlings of *Caragana microphylla* emerged from the seeds of Example 3 after 15 days. The morphology of some of the seeds after germination is shown in [the image / description]. Figure 4 The number of seedlings formed exceeded the number of germinations in the previous stage, possibly because some seeds that did not show signs of germination in the early stage later broke through the seed coat and developed into seedlings. Comparative Example 1 had 2 seedlings formed, while Comparative Example 2 had 0 seedlings formed.

Claims

1. A tacky seed coating agent for aerial seeding in deserts, characterized in that, The coating agent takes the seed as the core, and forms the inner layer of nutrient matrix and the outer layer of mucilage layer from inside to outside. The inner layer of nutrient matrix comprises water-retaining agent, binder and microbial inoculant. The outer layer of mucilage layer comprises adhesive, plant growth regulator and animal repellent, and the adhesive is gum arabic and natto resin.

2. A tacky seed coating agent for aerial seeding in desert according to claim 1, characterized in that, In the inner layer of nutrient matrix, the water-retaining agent is cross-linked polyacrylic acid potassium, the binder is sodium alginate, and the microbial inoculant is nitrogen-fixing bacteria and phosphorus-solubilizing bacteria.

3. A tacky seed coating agent for aerial seeding in deserts according to claim 2, characterized in that, The mass ratio of the water-retaining agent, the binder and the microbial inoculant is 2-4:1:0.

5.

4. A tacky seed coating agent for aerial seeding in desert according to claim 3, characterized in that, The mass ratio of the nitrogen-fixing bacteria to the phosphorus-solubilizing bacteria is 2-3:1; the concentration of the microbial flora of the microbial inoculant is not less than 1×10 8 CFU / g.

5. A tacky seed coating agent for aerial seeding in desert according to claim 1, characterized in that, The animal repellent is picric acid and capsaicin, and the plant growth regulator comprises gibberellic acid and indole butyric acid.

6. A tacky seed coating agent for aerial seeding in deserts according to claim 5, characterized in that, In the outer layer of mucilage layer, the mass ratio of the adhesive and the animal repellent is 3-5:1, the mass ratio of the gum arabic and the natto resin is 2-3:1, and the mass ratio of the picric acid and the capsaicin is 1:

1.

7. A tacky seed coating agent for aerial seeding in deserts according to claim 6, characterized in that, The addition concentration of the gibberellic acid in the outer layer of mucilage layer is 40-60 ppm, the addition concentration of the indole butyric acid in the outer layer of mucilage layer is 15-25 ppm, the concentration of the picric acid is 0.1%-0.3%, and the concentration of the capsaicin is 0.05%-0.1%.

8. A tacky seed coating agent for aerial seeding in deserts as claimed in claim 1, wherein, The seed is subjected to plasma activation treatment before forming the coating agent.

9. A tacky seed coating agent for aerial seeding in deserts as claimed in claim 1 wherein, The seed is Caragana microphylla.

10. Use of the tacky seed coating agent for desert aerial seeding according to any one of claims 1 to 9, characterized in that, The application is used for desert ecological restoration.

Images