Method for covering and treating spartina alterniflora by composite slurry

Abstract

The invention discloses a method for treating spartina alterniflora by covering with composite slurry. The method comprises the following steps: cutting; first composite slurry is laid, and a sealing layer is formed after solidification; and paving the second composite slurry to form the biological replacement layer. According to the method for covering and treating the spartina alterniflora through the composite slurry, the first composite slurry is laid to form a sealing layer, and ventilation and growth of a spartina alterniflora root system are prevented; second composite slurry is laid, germination and growth of local plant seeds are utilized, a stable vegetation covering layer is formed, and a growth space of the spartina alterniflora is replaced, so that regeneration of the spartina alterniflora is effectively inhibited, the long-acting treatment effect on the spartina alterniflora is ensured, and the ecological diversity of a region is improved; the method is simple, effective and easy to implement, the treatment effect on spartina alterniflora is good, and the comprehensive performance is excellent.

Description

Technical Field

[0001] The invention relates to the technical field of Spartina alterniflora control, in particular to a method for controlling Spartina alterniflora by covering with composite mud. Background Art

[0002] Spartina alterniflora is a powerful invasive plant that is widely distributed in my country's coastal wetlands and has a serious impact on local ecosystems. The control of Spartina alterniflora has become an important issue in ecological and environmental protection.

[0003] The existing methods for controlling Spartina alterniflora mostly adopt mowing, deep plowing, mulching, etc. For example, Chinese patent CN113712018A discloses a comprehensive method for controlling Spartina alterniflora by freshwater flooding; Chinese patent CN 102217481 B discloses a biological-physical control method for Spartina alterniflora in coastal wetlands.

[0004] Although these methods can inhibit the growth of Spartina alterniflora to a certain extent, the effects are not long-lasting, the recurrence rate is high, and it is difficult to control in specific areas. Summary of the invention

[0005] The invention provides a method for treating Spartina alterniflora by covering with composite mud, thereby solving the problems of great difficulty, short-lasting effect and high recurrence rate in treating Spartina alterniflora in the prior art.

[0006] In order to solve the above technical problems, the present invention provides a method for treating Spartina alterniflora by covering with composite mud, comprising the following steps:

[0007] (1) Mowing: Mowing the Spartina alterniflora in the treatment area, leaving a stubble height of 3-5 cm after mowing;

[0008] (2) laying the first composite mud: evenly laying the first composite mud in the cut Spartina alterniflora treatment area, covering the cut Spartina alterniflora stems, and forming a sealing layer after solidification;

[0009] (3) Laying the second composite mud: The second composite mud is evenly laid on the solidified first composite mud, wherein the second composite mud contains local plant seeds, which germinate and grow to form a biological replacement layer.

[0010] In a preferred embodiment of the present invention, the first composite mud comprises the following components in percentage by weight: 60-70% mud, 20-30% clay, 5% coarse sand, and 5% fine sand.

[0011] In a preferred embodiment of the present invention, the laying thickness of the first composite slurry is 10-15 cm.

[0012] In a preferred embodiment of the present invention, the second composite mud comprises the following components in percentage by weight: mud 70-80%, clay 20-30%; the content of the native plant seeds is 70-100g / m 3 .

[0013] In a preferred embodiment of the present invention, the laying thickness of the second composite slurry is 10-15 cm.

[0014] In a preferred embodiment of the present invention, the native plant seeds include Suaeda salsa seeds.

[0015] In a preferred embodiment of the present invention, the native plant seeds also include reed seeds.

[0016] In a preferred embodiment of the present invention, the weight ratio of the Suaeda salsa seeds to the Phragmites australis seeds is 1:1.

[0017] The beneficial effects of the present invention are as follows: the present invention provides a method for controlling Spartina alterniflora by covering with a composite mud, wherein a sealing layer is formed by laying a first composite mud to prevent the air permeability and growth of the root system of Spartina alterniflora; a stable vegetation covering layer is formed by laying a second composite mud by utilizing the germination and growth of seeds of local plants therein to replace the growth space of Spartina alterniflora, thereby effectively inhibiting the regeneration of Spartina alterniflora, ensuring a long-term control effect on Spartina alterniflora, and improving the ecological diversity of the region; the method of the present invention is simple, effective, easy to implement, has a good control effect on Spartina alterniflora, and has excellent comprehensive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a double-layer composite mud layer formed in a preferred embodiment of a method for treating Spartina alterniflora by covering with composite mud of the present invention;

[0019] The components in the drawings are marked as follows: 10. Sealing layer; 20. Biological replacement layer. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0021] The invention discloses a method for treating Spartina alterniflora by covering with composite mud, which specifically comprises the following steps:

[0022] (1) Mowing: Mowing the Spartina alterniflora in the treatment area, so that the stems of the Spartina alterniflora are no higher than 5 cm after mowing, so that they can be completely covered by the composite mud.

[0023] (2) Laying the first composite mud: using a mud pump to pump the first composite mud into the cut Spartina alterniflora treatment area, and evenly laying the first composite mud, controlling the laying thickness to be 10 to 15 cm, to ensure that the cut Spartina alterniflora stems are covered;

[0024] Specifically, the proportion of the first composite mud is calculated by weight percentage as follows: 60-70% mud, 20-30% clay, 5% coarse sand, and 5% fine sand, wherein the amount of clay added is determined according to the viscosity and water content of the mud, clay is added to the mud, the mud is adjusted to a colloid rate of more than 98%, and then coarse sand and fine sand are added in proportion. The clay can enhance the viscosity of the mud, so that it forms a dense layer after solidification; the coarse sand and fine sand form a structure with good particle grading, which helps to block the root system of Spartina alterniflora.

[0025] The first composite mud composed of the above formula has a bonding effect and forms a sealing layer 10 after solidification. On the one hand, it plays a role of physical isolation, preventing the air permeability of the roots of Spartina alterniflora, thereby preventing the growth of the roots of Spartina alterniflora; on the other hand, after the clay is solidified, it can further improve the density of the sealing layer, making it impossible for the roots or stems of Spartina alterniflora to break through the sealing layer, thereby preventing its recurrence and regeneration.

[0026] (3) Laying the second composite slurry: After the first composite slurry solidifies, the second composite slurry is promptly and evenly laid thereon, with the laying thickness controlled to be 8 to 15 cm, which is the biological replacement layer 20.

[0027] Specifically, the proportion of the second composite mud is calculated by weight percentage as follows: mud 70-80%, clay 20-30%; the content of the local plant seeds is 70-100g / m3. The local plant seeds are a mixture of soaked Suaeda salsa and reed seeds. The preparation method of the second mixed mud is: add the clay to the mud, mix evenly, add the soaked Suaeda salsa and reed seeds, and stir and mix evenly.

[0028] The salsa seeds and reed seeds are used to replace Spartina alterniflora to gradually restore the ecological environment. The weight ratio of the salsa seeds and reed seeds is 1:1. The addition of a small amount of clay is beneficial to improving the structural stability of the second composite mud layer and is conducive to the smooth germination and growth of the salsa seeds and reed seeds.

[0029] The second composite mud is mixed with Suaeda salsa seeds and Phragmites australis seeds. As time goes by, the Suaeda salsa seeds and Phragmites australis seeds germinate and grow, gradually covering the Spartina alterniflora treatment area and replacing the Spartina alterniflora to form a new ecosystem, thereby improving the ecological environmental quality of the region.

[0030] Suaeda salsa and Phragmites australis have strong growth capabilities and are particularly suitable for growing in saline-alkali environments. They can gradually replace the growth space of Spartina alterniflora and form a stable vegetation cover on it. Among them, Suaeda salsa has a well-developed root system, which helps to solidify the soil, can prevent soil erosion, and also provide a habitat for birds, with high ecological value. Phragmites australis serves as an auxiliary plant to further improve the diversity of the ecosystem.

[0031] The present invention covers the area with two layers of composite mud composed of different formulas. On the one hand, a sealing layer is formed by combining clay and sand, thereby preventing the air permeability and growth of the root system of Spartina alterniflora. On the other hand, the regeneration of Spartina alterniflora can be effectively inhibited through the planting of Suaeda salsa and reeds, and it can be gradually converted into a Suaeda salsa wetland suitable for bird habitat, thereby improving the ecological diversity and environmental quality of the region.

[0032] Example 1

[0033] In 2023, the Spartina alterniflora in the habitat of Yancheng Rare Bird Reserve was treated, and experiments were conducted in different areas at high tide, mid-tide and low tide. First, the Spartina alterniflora was mowed, and the height of the stems after mowing was 5 cm. Then, the first composite mud with a thickness of 10 cm was evenly covered in the experimental area. The ratio of the first composite mud was calculated by weight percentage: 70% mud, 20% clay, 5% coarse sand, and 5% fine sand. After the mud solidified, it was quickly covered with a second composite mud with a thickness of 10 cm. Its formula was (calculated by weight percentage): 70% mud, 30% clay; and each cubic meter of the second mixed mud contained 50g of alkali sedge seeds and reed seeds. After about 20 days, the alkali sedge seeds and reed seeds germinated. After one year of observation, the Spartina alterniflora did not recur, and the coverage rate of alkali sedge and reed vegetation reached 85%, with significant ecological effects.

[0034] Example 2

[0035] In 2023, the Spartina alterniflora in the Yancheng Nature Reserve was treated, and experiments were conducted in different areas at high tide, mid-tide, and low tide. First, the Spartina alterniflora was mowed, and the height of the stems after mowing was 5 cm. Then, the first composite mud with a thickness of 10 cm was evenly covered in the reserve. Its formula composition was (calculated by weight percentage): 75% mud, 25% clay, 5% coarse sand, and 5% fine sand. After the mud solidified, it was quickly covered with a second composite mud with a thickness of 10 cm. Its formula composition was: 80% mud, 20% clay; and each cubic meter of the second mixed mud contained 50g of alkali sedge seeds and reed seeds. After about 20 days, the alkali sedge seeds germinated. After a year of follow-up observation, the alkali sedge grew well, the Spartina alterniflora did not recur, and the wetland ecosystem was significantly improved.

[0036] The present invention discloses a composite mud covering method for treating Spartina alterniflora, which effectively eliminates Spartina alterniflora by combining physics and biology, and gradually restores the wetland ecological environment. The method is simple and effective, and through the combined design of two layers of mud and biological substitution, a long-term treatment effect is ensured, and the method is particularly suitable for promotion and use in coastal wetlands, mudflats and other areas.

[0037] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for treating Spartina alterniflora by covering with composite mud, characterized in that: The steps include: (1) Mowing: Mowing the Spartina alterniflora in the treatment area; (2) laying the first composite mud: evenly laying the first composite mud in the cut Spartina alterniflora treatment area, covering the cut Spartina alterniflora stems, and forming a sealing layer after solidification; (3) Laying the second composite mud: The second composite mud is evenly laid on the solidified first composite mud, wherein the second composite mud contains local plant seeds, which germinate and grow to form a biological replacement layer.

2. The method for treating Spartina alterniflora by covering with composite mud according to claim 1, characterized in that: The first composite mud comprises the following components in percentage by weight: 60-70% mud, 20-30% clay, 5% coarse sand and 5% fine sand.

3. The method for treating Spartina alterniflora by covering with composite mud according to claim 2, characterized in that: The laying thickness of the first composite slurry is 10 to 15 cm.

4. The method for treating Spartina alterniflora by covering with composite mud according to claim 1, characterized in that: The second composite mud comprises the following components in percentage by weight: mud 70-80%, clay 20-30%; the content of the native plant seeds is 70-100g / m 3 .

5. The method for treating Spartina alterniflora by covering with composite mud according to claim 4, characterized in that: The laying thickness of the second composite slurry is 10 to 15 cm.

6. The method for treating Spartina alterniflora by covering with composite mud according to claim 1 or 4, characterized in that: The native plant seeds include Suaeda salsa seeds.

7. The method for treating Spartina alterniflora by covering with composite mud according to claim 6, characterized in that: The native plant seeds also include reed seeds.

8. The method for treating Spartina alterniflora by covering with composite mud according to claim 7, characterized in that: The weight ratio of the Suaeda salsa seeds to the Phragmites australis seeds is 1:1.

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