Composition and application thereof in ecological restoration

Abstract

The invention provides a composition and application thereof in ecological restoration, and the composition is granular and is prepared from glume of corncob, polyvinyl alcohol, sodium bentonite and water. The composition can keep soil moisture and improve the soil structure, the raw materials are biomass materials, water retention is achieved, food sources can be provided for microorganisms and soil animals in soil, microcirculation of moisture and soil organisms is formed around the composition, the soil organisms can further increase nutrients in the soil, and the soil quality is improved. Soil carbon-solid continuous increase of soil organic matters and aggregates is realized, and the method has great significance on ecological restoration.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ecological restoration materials, and particularly relates to a composition and application thereof in ecological restoration. BACKGROUND

[0002] Ecological restoration, also known as ecological recovery or ecological reconstruction, refers to the restoration and reconstruction of damaged or degraded ecosystems through artificial intervention and natural recovery, so as to restore the structure and function of the ecosystem and improve the stability and sustainability of the ecosystem. The goal of ecological restoration is to achieve the health, stability and diversity of the ecosystem, and the continuous supply of ecosystem services.

[0003] The main problems of ecological restoration in China are mainly soil salinization caused by natural reasons and excessive cultivation, land desertification caused by climate change and excessive industrial water use, and mine waste accumulation areas caused by early mineral mining. In these damaged areas, the precipitation is small, the evaporation is large, the land water storage capacity is poor, and the soil structure is damaged, which causes great disturbance to ecological restoration, and the water resource demand is large during the restoration process, resulting in high cost. SUMMARY

[0004] The present application provides a composition and application thereof in ecological restoration, which comprises corn husk, polyvinyl alcohol, sodium bentonite and water, can be directly sprinkled in the soil or applied with fertilizer, can effectively improve the soil structure, enhance the soil water storage capacity, increase the soil organic matter content and form microcirculation with surrounding microorganisms and animals, so as to restore the soil environment and promote ecological restoration.

[0005] In the first aspect, the present application provides a composition, which comprises corn husk, polyvinyl alcohol, sodium bentonite and water.

[0006] The method for obtaining the husk is not particularly required, and the following is one of them: the complete corn cob is crushed, and the corn husk is obtained by air separation, and the obtained corn husk is mainly 2-3 mm in particle size.

[0007] The present application finds that the corn cob husk has strong water absorption capacity, and the water absorption capacity can reach 1452.5% of the original weight after testing, which is very suitable as a water retention material. The remaining corn cob pieces after crushing can be used as chemical raw materials, industrial wastewater adsorbents and edible fungus culture medium, etc., to further reduce the cost of the husk.

[0008] Preferably, the composition comprises, by mass: 16-22 parts of corn husk, 8.3-11.1 parts of polyvinyl alcohol, 8.3-22.2 parts of sodium bentonite, and 44-66 parts of water. The total parts of the composition by mass are preferably 100 parts.

[0009] The corn hulls in the above-mentioned material are biomass materials, which are easy to obtain, abundant in quantity, pollution-free, degradable, environmentally friendly, and can provide organic matter for soil, improve soil structure and provide fertility after being mixed with soil; the remaining component bentonite is also taken from nature and is naturally environmentally friendly. Meanwhile, the composition is a biomass material, which can provide food sources for microorganisms and soil animals in the soil in addition to water retention, plays a role in water retention, water evaporation reduction and seepage reduction, and forms a microcirculation of water and soil organisms around the water-retaining agent, which further increases the nutrients in the soil.

[0010] In a second aspect, the present application provides a product containing the above-mentioned composition, which is an ecological restoration material, an environmental improvement material or an urban greening material.

[0011] In a third aspect, the present application provides the use of the above-mentioned composition in the preparation of an ecological restoration material, an environmental improvement material or an urban greening material.

[0012] In a fourth aspect, the present application provides the use of the above-mentioned composition or product in any of the following aspects: (1) mine restoration.

[0013] (2) slope greening.

[0014] (3) afforestation.

[0015] (4) saline-alkali soil treatment.

[0016] (5) sand treatment.

[0017] (6) soil ecological environment restoration.

[0018] In a fifth aspect, the present application provides a method for ecological restoration or land treatment, specifically a method for mixing the above-mentioned composition or product into soil and planting plants.

[0019] Preferably, the method for mixing the composition or product into soil in the above-mentioned method includes strip application, hole application, scattering application, layering application, and mixing with fertilizer.

[0020] Preferably, the amount of the composition or product mixed into soil in the above-mentioned method is 60-80 kg / mu, preferably 70 kg / mu.

[0021] The composition provided by the present application plays a role in water retention, water evaporation reduction and seepage reduction, and increases soil organic matter, which can significantly improve the growth ability of plants on soil to which the composition is applied, enhance the efficiency of ecological restoration, and reduce the cost of restoration.

[0022] Preferably, the plants in the above-mentioned ecological restoration method are plants adapted to the local environment, including but not limited to corn, oats, alfalfa, meadow grass, ice grass, Elymus dahuricus, Poa trivialis, and Humulus scandens.

[0023] Preferably, the preparation method of the above composition is: (1) weigh each raw material according to the mass ratio; (2) first add corn hulls, then add polyvinyl alcohol and sodium bentonite, and stir evenly; (3) add water at one time, and stir evenly; (4) pour the well-stirred raw materials into a granulator to granulate The beneficial effects of the present application include: (1) The present application provides a composition with ecological restoration function, which uses polyvinyl alcohol, sodium bentonite, corn hulls and water as raw materials, the raw materials are widely available and low in cost, the composition itself is easy to apply and environmentally friendly.

[0024] (2) The application of the composition provided by the present application can enhance the water retention capacity of the soil, improve the soil structure, reduce the diurnal temperature difference of the soil, and increase the soil conductivity, so that the soil to which the composition is applied is more suitable for plant growth, which is beneficial to plant planting in harsh environments, and promotes ecological restoration and environmental management in severely damaged soil areas such as saline-alkali soil, sandy land and mine.

[0025] (3) The composition in the present application is a biomass material, which can provide food sources for microorganisms and soil animals in the soil, form a microcirculation of water and soil organisms around while retaining water, reducing water evaporation and seepage, and these organisms further increase the nutrients in the soil, which is beneficial to the overall repair of the damaged area ecosystem. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0027] Figure 1 It is the appearance picture of the composition prepared according to Example 1.

[0028] Figure 2 It is the effect picture of the composition in Example 2 in the repair of saline-alkali soil.

[0029] Figure 3 It is the effect picture of the composition in Example 3 in the repair of sandy land. DETAILED DESCRIPTION

[0030] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0031] Embodiment 1 The present embodiment provides a preparation method of the composition.

[0032] The steps of the composition preparation method are as follows: The total amount of one-time feeding of the granulator is 1000g.

[0033] (1) The raw materials are weighed according to the mass ratio of corn hull: polyvinyl alcohol: sodium bentonite: water 2:1:3:4, and the total amount is 1000g.

[0034] (2) The hull is added first, followed by the addition of polyvinyl alcohol and sodium bentonite, and stirring is uniform.

[0035] (3) The water is added at one time, and stirring is uniform.

[0036] (4) After the raw materials are uniformly mixed, they are poured into a disc granulator (manufacturer: Zhengzhou Huachuang Machinery Co., Ltd. Model HCYP-500) (the speed button is adjusted to 2.5, and the disc inclination angle is 45°), and rotary granulation is performed.

[0037] The prepared water-retaining agent has an appearance as shown in Figure 1 , and the granulation rate is 96% to 99%.

[0038] Embodiment 2 The present embodiment provides an application of the composition prepared in Embodiment 1 in improving the growth of plants in saline-alkali soil.

[0039] The experiment is carried out in a moderate saline-alkali soil in Nandagang, Cangzhou, the tested plant is alfalfa, the control group is not treated before sowing, the composition group applies 70kg of the composition prepared in Embodiment 1 per mu of land before sowing, normal fertilization and watering, the alfalfa emergence rate is detected after 15 days of sowing, and the alfalfa plant height, biomass and soil water content are detected after 45 days of sowing, the results are shown in Table 1, and the effects are shown in Figure 2 .

[0040] As shown in Table 1, the alfalfa emergence rate, plant height and biomass of the composition application group are significantly higher than those of the control group; the emergence rate is increased by 22.8% compared with the control group, the plant height is increased by an average of 45.4%, the biomass is increased by 40.4%, and the soil water content is increased by 3.2 percentage points.

[0041] AsFigure 2 It can be seen that the saline-alkali soil using the composition has higher seedling emergence rate after planting alfalfa, and the seedlings grow more luxuriantly, and the alfalfa plants are more vigorous.

[0042] Example 3 The present example provides the use of the composition prepared in Example 1 in improving the growth of plants in sandy land.

[0043] The experiment was carried out on the sandy land of Hebei Tangshan Luanzhou Jiluan Paper Group, and alfalfa was planted on an area of 20 mu. The control group was not treated, and the experimental group was applied with 70 kg of the composition per mu before planting. On March 18, 2025, the results are shown in Table 2, and the effects are shown in Figure 3 .

[0044] As can be seen from Table 2, the seedling emergence rate of alfalfa applied with the composition is increased by 10.3% compared with the control, and the plant height at the end of the growth season is significantly increased by 86.3%; the survival rate of regrowth, as well as the root length and rhizosphere soil weight of regrowth seedlings are significantly higher than those of the control, and are increased by 16.5%, 19.6% and 88.2% respectively. The effect of the composition on the survival rate of regrowth and rhizosphere soil weight is more obvious than other indicators, indicating that the application of the composition is beneficial to the wintering and root growth of alfalfa in sandy land environment.

[0045] As can be seen from Table 2, the seedling emergence rate of alfalfa applied with the composition is increased by 10.3% compared with the control, and the plant height at the end of the growth season is significantly increased by 86.3%; the survival rate of regrowth, as well as the root length and rhizosphere soil weight of regrowth seedlings are significantly higher than those of the control, and are increased by 16.5%, 19.6% and 88.2% respectively. The effect of the composition on the survival rate of regrowth and rhizosphere soil weight is more obvious than other indicators, indicating that the application of the composition is beneficial to the wintering and root growth of alfalfa in sandy land environment. Figure 3 It can be seen that the alfalfa applied with the composition has better seedling emergence rate and overwintering and regrowth rate in sandy land environment, and the root system is more developed, and the plant is more luxuriant.

[0046] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A composition characterized in that, The composition comprises corn hulls, polyvinyl alcohol, sodium bentonite and water.

2. The composition of claim 1, wherein, The composition comprises, by mass: 16-22 parts of hulls, 8.3-22.2 parts of sodium bentonite, 8.3-11.1 parts of polyvinyl alcohol, and 44-66 parts of water.

3. A product characterized by, The product is an ecological restoration material, an environmental improvement material or an urban greening material.

4. Use of the composition of any one of claims 1 or 2 in the preparation of an ecological restoration material, an environmental improvement material or an urban greening material.

5. Use of the composition of any one of claims 1 or 2 or the product of claim 3 in any one of: (1) mine restoration; (2) slope greening; (3) afforestation; (4) saline-alkali land treatment; (5) sandy land treatment; (6) soil ecological environment restoration. The composition of any one of claims 1 or 2 or the product of claim 3 is incorporated into soil and plants are planted. The composition or product is incorporated into soil at a dosage of 60-80 kg / acre, preferably 70 kg / acre. The soil is suitable for light, moderate or severe degradation land types, including but not limited to: saline-alkali land, sandy land or mine waste land. The plants are plants adapted to the local environment, including but not limited to: corn, oats, alfalfa, ice grass, Elymus dahuricus, Poa annua, and Hu Zhi Zi. The method for preparing the composition is: (1) each raw material is weighed according to the mass ratio; 6. A method of ecological restoration or land remediation, characterised in that, (2) corn hulls are first added, followed by polyvinyl alcohol and sodium bentonite, and stirred until uniform; 7. The method of claim 6, wherein, (3) water is added at once and stirred until uniform; 8. The method of claim 6, wherein, (4) the uniformly stirred raw materials are poured into a granulator and granulated.

9. The method of ecological restoration according to claim 6, characterized in that, ​ 10. The composition according to any one of claims 1 to 5, characterized in that, ​ ​ ​ ​ ​

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