Batch production process of marine matrix in bare spot repair area of seaweed bed

Abstract

The invention provides a batch production process of a marine matrix in a naked spot repairing area of a seaweed bed, and belongs to the field of ecological restoration of the seaweed bed, and the batch production process comprises the following steps: S1, sampling the marine matrix in the naked spot repairing area and carrying out a particle analysis experiment; s2, marine matrix outsourcing soil source detection and purchase; s3, screening and mixing an outsourcing soil source; s4, sampling and detecting the mixed marine matrix; and S5, bagging and storing. The marine matrix batch production process provided by the invention is simple and easy to implement, has low operation requirements, can reconstruct a matrix environment suitable for the sea grass bed in a sea grass bed bare board repair area, and provides a good matrix source for large-scale repair of sea grass in the sea grass bed bare board repair area.

Description

Technical Field

[0001] The present invention relates to the field of seagrass bed ecological restoration, and particularly to a marine substrate production process for seagrass bed bare patch restoration areas. Background Art

[0002] Seagrass beds are another important marine ecosystem after mangroves and coral reefs. They are habitats for many large marine organisms and even mammals, with high primary productivity and strong carbon sequestration capabilities. With the increasing intensity of marine development and utilization, global seagrass beds are declining rapidly, and the protection and restoration of seagrass bed ecosystems are urgent.

[0003] The factors affecting seagrass growth mainly include temperature, light, salinity, and marine substrate, etc. Among them, due to natural environmental changes such as continuous high temperature and continuous rainfall, especially human activities, a large number of bare patch restoration areas have been formed in seagrass beds. Such bare patch restoration areas are composed of multiple nearly circular bare patch pits lacking substrates. The seagrass beds in this area are damaged, and the continuity of the seagrass beds is severely damaged.

[0004] Currently, our unit has completed the first domestic project of backfilling substrates in seagrass bed bare patch restoration areas. Based on the project experience, a marine substrate backfilling process for seagrass bed bare patch restoration areas is proposed. This process is simple and easy to implement, with low operation requirements, and can effectively control the suspended sediment volume. By adopting this backfilling process, a substrate environment suitable for seagrass growth can be provided for seagrass bed bare patch restoration areas, which is of great significance for large-scale restoration of seagrass beds. Summary of the Invention

[0005] The main purpose of this application is to provide a batch production process for marine substrates in seagrass bed bare patch restoration areas, so as to solve the problem that seagrass in bare patch restoration areas cannot grow properly due to changes in substrate conditions.

[0006] A batch production process for marine substrates in seagrass bed bare patch restoration areas includes the following steps: S1: Sampling and particle analysis experiment of marine substrates in bare patch restoration areas; S2: Detection and procurement of purchased soil sources for marine substrates; S3: Screening and mixing of purchased soil sources for marine substrates; S4: Sampling and detection of the mixed marine substrates; S5: Bagging and storage.

[0007] In a possible implementation, in step S1, when sampling the marine substrate in the bare spot repair area, 1 sediment core sample with a vertical length of 70 cm is taken randomly at three locations 20 cm outward from the edge of the bare spot pit and sent to a laboratory with corresponding qualifications for testing. During the particle analysis experiment, each core sample is cut into two sections of 0 - 30 cm and 30 - 70 cm. Using the sieving method and the moisture method, the samples are sieved into 4 particle size groups of >2 mm, 2 - 0.075 mm, 0.075 - 0.005 mm, and <0.005 mm, and a statistical table of the particle size distribution data analysis results of the sediment in the bare spot pit is obtained.

[0008] In a possible implementation, in step S2, 3 random samples are taken from different parts of the soil source to be purchased, with the mass of each sample not less than 1.5 kg, and sent to a laboratory with corresponding qualifications for quality testing. When the test results meet the quality requirements of Class I marine sediment, it can be purchased as an externally purchased soil source. 3 In a possible implementation, in step S3, a three - level screening is carried out on the externally purchased soil source, that is, sieving according to the particle sizes of sand (2 - 0.075 mm), silt (0.075 - 0.005 mm), and clay (<0.005 mm). Using the method of wire mesh sieves, the grading screening of each level of the same soil source is repeated 3 times. Before screening, the imported soil should be turned over and dried by machinery to ensure that the natural moisture content of the soil source to be screened meets the mixing requirements.

[0009] In a possible implementation, in step S3, mixing is carried out according to the volume ratio of sand (2 - 0.075 mm), silt (0.075 - 0.005 mm), and clay (<0.005 mm) in the particle size distribution data analysis results of the sediment in step 1. If the materials do not meet the construction dosage, the missing particle size soil source should be purchased externally. After repeating the screening steps in claim 4, the missing particle size is selected for supplementation.

[0010] In a possible implementation, an excavator and a loader are used for mixing. For every 1000 m

[0011] The mixing time is not less than 8 h to ensure uniform grading mixing; when unevenness is still found on - site, the mixing time should be increased until it is evenly mixed. 3 In a possible implementation, in step S4, 3 samples are randomly taken from different parts of the mixed marine substrate, with the mass of each sample not less than 1.5 kg, and sent to a laboratory with qualifications for particle analysis experiments. The experimental results should be compared with the data in the statistical table of the particle size distribution data analysis results of the sediment in the bare spot pit. If the deviation of each data is within 5%, it is considered qualified; if not, repeat steps S3 and S4 of the claim until it is qualified. Thus, the marine substrate required for the bare spot repair area is obtained.

[0012] In a possible implementation, in step S4, for every 100 m 3 3 samples are randomly taken from different parts of the mixed marine substrate, with the mass of each sample not less than 1.5 kg, and sent to a laboratory with qualifications for particle analysis experiments. The experimental results should be compared with the data in the statistical table of the particle size distribution data analysis results of the sediment in the bare spot pit. If the deviation of each data is within 5%, it is considered qualified; if not, repeat steps S3 and S4 of the claim until it is qualified. Thus, the marine substrate required for the bare spot repair area is obtained.

[0013] In a possible implementation, the mesh bags for filling the marine substrate required for the bare patch repair area can use jute bags or ecological woven bags. The mesh bags should ensure that the bottom substrate particles do not scatter. The length of the mesh bag is 70 cm to 100 cm, and the width is 50 cm to 80 cm. After filling the bag, seal it. The sealed bottom substrate mesh bag should be transported to the bare patch repair area for backfilling as soon as possible. The mesh bag should be avoided from being handled and shaken multiple times, and seawater should be sprayed every day to keep it moist.

[0014] The beneficial effects of the batch production process of the marine substrate provided by the present invention are as follows: This process solves the problem of the substrate source for repairing the marine substrate in the bare patch repair area of seagrass beds in China. Through operations such as screening, proportioning, mixing, and testing of the purchased soil source, a marine substrate suitable for the growth of seagrass can be obtained. This process is simple and easy to implement, has low operation requirements, can be mass-produced, and can reconstruct a marine substrate environment suitable for the growth of seagrass in the bare patch repair area of seagrass beds after being put in, providing the possibility for large-scale repair of seagrass beds! Description of the Drawings

[0015] Figure 1 Process step diagram of a batch production process of a marine substrate;

[0016] Figure 2 Statistical table of the analysis results of the particle size distribution of the sediment in the bare patch pit;

[0017] Figure 3 Comparison diagram of seagrass growth before and after the substrate is put in the bare patch pit in the embodiment. Detailed Embodiments

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] Please refer to Figure 1 , and now the batch production process of the marine substrate in the bare patch repair area of seagrass beds provided by the present invention will be described. The batch production process of the marine substrate in the bare patch repair area of seagrass beds includes the following steps: S1: Sampling and particle analysis experiment of the marine substrate in the bare patch repair area; S2: Detection and procurement of the purchased soil source of the marine substrate; S3: Screening and mixing of the purchased soil source of the marine substrate; S4: Sampling and detection of the mixed marine substrate; S5: Bagging and preservation.

[0020] Among them, in step S1, when sampling the marine substrate in the bare spot repair area, 1 sediment column sample with a vertical length of 70 cm was randomly taken at three places 20 cm outward along the edge of the bare spot pit and sent to a laboratory with corresponding qualifications for testing. During the particle analysis experiment, each column sample was cut into two sections of 0 - 30 cm and 30 - 70 cm, and the screening method and moisture method were used to screen the samples into 4 particle size groups of >2 mm, 2 - 0.075 mm, 0.075 - 0.005 mm, and <0.005 mm, obtaining the statistical table of the particle size distribution data analysis results of the sediment in the bare spot pit.

[0021] In step S2, 3 random samples were taken from different parts of the proposed soil source to be purchased, and the mass of each sample was not less than 1.5 kg. The samples were sent to a laboratory with corresponding qualifications for quality testing. When the test results meet the quality requirements of Class I marine sediments, it can be purchased as an externally purchased soil source. 3 In step S3, a rotary tiller was used to turn over and dry the imported soil to ensure that the natural moisture content of the soil source to be screened meets the mixing requirements. The externally purchased soil source was subjected to three - level screening, that is, screening according to the particle sizes of sand (2 - 0.075 mm), silt (0.075 - 0.005 mm), and clay (<0.005 mm). The method of using a mesh sieve was adopted, and the sieve holes were 2 mm, 0.075 mm, and 0.005 mm. Each level of grading screening of the same soil source was repeated 3 times. Before screening, the imported soil should be turned over and dried by machinery to ensure that the natural moisture content of the soil source to be screened meets the mixing requirements.

[0022] In step S3, according to the volume ratio of sand (2 - 0.075 mm), silt (0.075 - 0.005 mm), and clay (<0.005 mm) in the sediment particle size distribution data analysis results of step 1, a mixer was used for mixing. If the materials do not meet the construction dosage, the missing particle size soil source should be purchased externally. After repeating the screening steps of claim 4, the missing particle size was selected for supplementation.

[0023] In step S3, an excavator and a loader were used for cooperation in mixing. For every 1000 m

[0024] The mixing time was not less than 8 h to ensure uniform grading mixing. When unevenness was still found on - site, the mixing time should be increased until it was evenly mixed. 3 In step S4, 3 samples were randomly taken from different parts of the mixed marine substrate for each 100 m

[0025] The mass of each sample was not less than 1.5 kg, and the samples were sent to a qualified laboratory for particle analysis experiments. The experimental results should be compared with the data in the statistical table of the sediment particle size distribution data analysis results of the bare spot pit. If the deviation of each data is within 5%, it is considered qualified; if not, repeat steps S3 and S4 of the claim until the requirements are met. Thus, the marine substrate required for the bare spot repair area was obtained. 3 In step S4, 3 samples were randomly taken from different parts of the mixed marine substrate, and the mass of each sample was not less than 1.5 kg. The samples were sent to a laboratory with qualifications for particle analysis experiments. The experimental results should be compared with the data in the statistical table of the sediment particle size distribution data analysis results of the bare spot pit. If the deviation of each data is within 5%, it is considered qualified; if not, repeat steps S3 and S4 of the claim until the requirements are met. Thus, the marine substrate required for the bare spot repair area was obtained.

[0026] The mesh bags for filling the marine substrate required for the bare patch repair area can use ecological woven bags. The mesh bags should ensure that the bottom substrate particles do not scatter. The length of the mesh bag is 70 cm to 100 cm, and the width is 50 cm to 80 cm. After filling the bag, seal it. The sealed bottom substrate mesh bag should be transported to the bare patch repair area for backfilling as soon as possible. The mesh bag should avoid multiple handling and shaking, and be sprayed with seawater every day to keep it moist.

[0027] After putting the marine substrate produced in this embodiment in the experimental sea area in 2022, seagrass planting and transplantation were carried out immediately. According to the observation results in 2023, the survival rate of seagrass vegetation in this area increased from 0 - 5% to ≥20%, the seagrass area in the sparse area increased by ≥5%, and the coverage in the bare patch area increased by ≥20%.

[0028] The beneficial effects of the batch production process of the marine substrate provided by the present invention are as follows: This process solves the problem of the substrate source for the marine substrate in the bare patch repair area of seagrass beds in China. Through operations such as screening, proportioning, mixing, and testing of the purchased soil source, a marine substrate suitable for seagrass growth can be obtained. This process is simple and easy to implement, has low operation requirements, can be mass-produced, and can reconstruct the marine substrate environment in the bare patch repair area of seagrass beds after being put in, providing the possibility for large-scale seagrass bed restoration!

Claims

1. A mass production process for marine substrates in a seagrass bed bare patch restoration area, characterized in that, The process includes the following steps: S1: Sampling of marine substrate in the bare spot repair area and particle analysis experiment; S2: Detection and procurement of externally purchased soil sources for marine substrate; S3: Screening and mixing of externally purchased soil sources for marine substrate; S4: Sampling and detection of the mixed marine substrate; S5: Bagging and preservation.

2. The marine substrate mass production process for the seagrass bed bare patch restoration area according to claim 1, characterized in that, In the marine substrate sampling and particle analysis experiment described in step S1, one sediment column sample with a vertical length of 70 cm should be randomly taken at three locations 20 cm outward from the edge of the bare spot pit and sent to a laboratory with corresponding qualifications for testing. During the particle analysis experiment, each column sample is cut into two sections of 0 - 30 cm and 30 - 70 cm, and the samples are screened into four particle size groups of >2 mm, 2 - 0.075 mm, 0.075 - 0.005 mm, and <0.005 mm using the screening method and moisture method to obtain a statistical table of the particle size distribution data of the sediment in the bare spot pit.

3. The mass production process of the marine substrate in the seagrass bed bare patch restoration area according to claim 1, characterized in that, For the detection of the purchased marine matrix soil source described in step S2, the requirements are as follows: Randomly collect 3 samples from different parts of the soil source to be purchased, with the mass of each sample not less than 1.5 kg, and send them to a laboratory with corresponding qualifications for quality inspection. When the inspection results meet the quality requirements of Class I marine sediment, it can be purchased as an externally purchased soil source. 3 Randomly take 3 samples from different parts of the soil source to be purchased, with the mass of each sample not less than 1.5 kg, and send them to a laboratory with corresponding qualifications for quality inspection. When the inspection results meet the quality requirements of Class I marine sediment, it can be purchased as an externally purchased soil source.

4. The mass production process of marine matrix for seagrass bed bare patch restoration area according to claim 1, characterized in that, In the screening of the externally purchased soil source substrate described in step S3, it refers to a three - level screening of the externally purchased soil source, that is, screening according to the particle sizes of sand (2 - 0.075 mm), silt (0.075 - 0.005 mm), and clay (<0.005 mm). The method of mesh screening is adopted, and the grading screening of each level of the same soil source is repeated 3 times. Before screening, the imported soil should be turned over and dried by machinery to ensure that the natural moisture content of the soil source to be screened meets the mixing requirements.

5. The mass production process of marine matrix for seagrass bed bare patch restoration area according to claim 1, characterized in that, In the mixing of the externally purchased soil source described in step S3, it should be mixed according to the volume ratio of sand (2 - 0.075 mm), silt (0.075 - 0.005 mm), and clay (<0.005 mm) in the particle size distribution data analysis result of the sediment in step 1. If the materials do not meet the construction dosage, the missing particle size soil source should be externally purchased, and after repeating the screening steps in claim 4, the missing particle size should be selected for supplementation.

6. The purchased soil source mixing according to claim 5, wherein It is advisable to use an excavator and a loader for mixing. For every 1000m 3 The mixing time shall not be less than 8h to ensure uniform grading mixing. When unevenness is still found on site, the mixing time shall be increased until the mixing is uniform.

7. The mass production process of the marine substrate for the seagrass bed bare patch restoration area according to claim 1, wherein, For the sampled and tested mixed marine matrix described in step S4, it is required to randomly take 3 samples from different parts of the mixed marine matrix every 100m 3 The mass of each sample shall be not less than 1.5 kg, and the samples shall be sent to a qualified laboratory for particle analysis experiments. The experimental results shall be compared with the data in the statistical table of the particle size distribution data analysis of the bare patch pit sediment. If the deviation of each data is within 5%, it is qualified; if not, repeat steps S3 and S4 of the claims until the requirements are met. Thus, the marine matrix required for the bare patch repair area is obtained.

8. The mass production process of marine matrix for seagrass bed bare patch restoration area according to claim 1, characterized in that, In the bagging and preservation described in step S5, the mesh bags for filling the marine substrate required for the bare spot repair area can be made of jute bags or ecological woven bags. The mesh bags should ensure that the substrate particles do not scatter. The length of the mesh bag is 70 cm - 100 cm, and the width is 50 cm - 80 cm. After filling the bag, it is sealed. The sealed substrate mesh bags should be transported to the bare spot repair area for backfilling as soon as possible. The mesh bags should be avoided from being moved and shaken multiple times, and seawater should be sprayed every day to keep them moist.

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