A method for tracing the spread of the alien invasive plant solidago canadensis with nursery stock

Abstract

The present application relates to the technical field of biological safety and ecological protection, and discloses a method for tracing the spread of alien invasive plant Solidago canadensis with nursery stock, which comprises the following steps: collecting and recording the geographic coordinates, root base soil color, plant species in the root base soil range, and specification attribute data of the nursery stock in the planting area of the nursery stock suspected to carry Solidago canadensis and the spread points caused by the transportation of the nursery stock; identifying the color of the root base soil by using the Munsell color system and three attributes of color; and adopting a three-step analysis strategy to accurately identify the source of Solidago canadensis carried by the nursery stock, evaluating the spread risk of Solidago canadensis according to the tracing result, and putting forward targeted prevention and control suggestions for source control and early monitoring and early warning. The tracing analysis method can identify the region-specificity of the four types of data, i.e., root base soil, associated plant species, diameter, and branch height, thereby ensuring the accuracy of the tracing result.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of biological safety and ecological protection, in particular to a method for tracing the spread of alien invasive plant Solidago canadensis with nursery stock. BACKGROUND

[0002] As an alien invasive plant, Solidago canadensis has a strong reproductive ability and a fast spreading speed, and poses a serious threat to the biodiversity and ecological safety of China. In recent years, the new occurrence points of Solidago canadensis in China have shown a trend of continuous increase. It is a major problem for early monitoring, early warning and prevention and control to find out the transmission route and the source of spread of these new invasive points. Solidago canadensis mainly reproduces and spreads through seeds and rhizomes, which leads to diversified transmission routes. Studies have found that in recent years, the new invasive points of Solidago canadensis, especially the new invasive points across regions, are one of the important transmission ways of nursery stock transportation. However, there is still a lack of systematic tracing analysis method for this transmission route, which significantly restricts the ability of source control and early monitoring and early warning, and makes it difficult to effectively curb the spread and spread of Solidago canadensis. SUMMARY

[0003] In view of the deficiencies of the prior art, the present application provides a method for tracing the spread of alien invasive plant Solidago canadensis with nursery stock, which solves the problems in the background art.

[0004] To achieve the above purpose, the present application is realized by the following technical scheme: the method for tracing the spread of alien invasive plant Solidago canadensis with nursery stock consists of the following steps:

[0005] A1, sample collection: in the nursery planting area suspected to carry Solidago canadensis and the spread point caused by nursery stock transportation, respectively collect and record the geographical coordinates, root base soil color, plant species (at least 8 species of Solidago canadensis and other main plants) in the root base soil range, and the specification attribute data (such as diameter, branch height, crown shape, tree shape) of nursery stock;

[0006] A2, soil classification: using the Munsell color system, that is, based on the three attributes of color, namely hue, value and chroma, to identify the color of the root base soil, for example, the red soil is represented by the Munsell color system as 2.5YR4 / 8.

[0007] A3, data comparison and analysis: using a three-step analysis strategy to accurately identify the source of Solidago canadensis carried by nursery stock;

[0008] A4, construction of tracing path: combining the geographic information system and the spatial distribution information of the sample collection points, a spread tracing path diagram of Solidago canadensis is constructed;

[0009] A5, risk assessment and prevention and control suggestions: according to the traceability results, the risk of spread of goldenrod in Canada is evaluated, and the source control and early monitoring and warning targeted prevention and control suggestions are put forward.

[0010] Preferably, in A1, the root base soil of the seedling, the plant species (goldenrod in Canada and other species), the diameter (1 meter from the ground) of the seedling, the crown shape, the tree shape, and the branch height (referring to the position of the side branches on the main stem or branch) are collected at the source of the seedling.

[0011] Preferably, in A1, the root base soil of the seedling, the plant species (goldenrod in Canada and other species), the diameter (1 meter from the ground) of the seedling, the crown shape, the tree shape, and the branch height (referring to the position of the side branches on the main stem or branch) are collected at the source of the seedling.

[0012] Preferably, in A1, the database of the source and the spread of the seedling is respectively constructed; based on the above collected data, the data is recorded by using a unified measurement standard, and the database of different sources (including soil, associated plants (at least 8 species), diameter, crown shape, and tree shape) and spread (including soil, associated plants (multiple), diameter, crown shape, tree shape, and wrapping) is formed.

[0013] Preferably, in A2, the root soil color: during the transplanting process, the seedling often carries a certain amount of root base soil to ensure the nutrient supply during the transportation process, so the soil at a depth of 10-30 cm from the root of the seedling is taken.

[0014] Preferably, in A3, the analysis strategy consists of the following steps:

[0015] Firstly, for each source data, cluster analysis is performed according to the rhizosphere soil color, diameter, branch height, crown shape, tree shape, and plant species, the grouping characteristics are viewed, and the significant difference of diameter and branch height between different classification groups is tested, such as significant determination as the optimal grouping, because the diameter of the same batch of seedlings is usually the same; the difference of associated plant species in the group is checked and determined, and if there is a difference, supplementary investigation is needed to ensure that the difference of plant species is not caused by sampling.

[0016] Secondly, for each spread seedling data, cluster analysis is performed according to the root base soil, diameter, crown shape, and wrapping, the batch of seedlings input into the spread is identified, because there are different batches of input from different sources in many places; the difference of root base plant species in the same batch and between batches is compared; the native plants of the spread are identified; at the same time, the difference of plants within the root base range of different seedlings in the same batch is compared, and the tree pits without plants carried with the root base soil are removed, so as to reduce the influence of plant species difference on the analysis of the source.

[0017] Thirdly, according to the soil, diameter, branch height, crown shape, tree shape and plant species, the data after the arrangement are subjected to cluster analysis, the cluster results are used to determine the source of the Canada goldenrod carried by the seedling, the cluster results of the data of the same source and the classification results of the data of the diffusion place, and the cluster analysis results of the model are evaluated by using the model evaluation method, and if the accuracy is greater than 0.65, it can be determined that the analysis results of the model are reliable.

[0018] The application provides a method for tracing the source of an invasive plant, Canada goldenrod, which is diffused with seedlings.

[0019] Efficiency: The data of the root soil, associated plant species, diameter, branch height and cloth type required for collection are easy to obtain. Except for the soil color which needs to be detected indoors, the rest of the data can be collected on site. This method not only reduces the workload, but also significantly improves the detection efficiency and shortens the time required for tracing.

[0020] Accuracy: The tracing analysis method constructed can identify the region-specificity based on the four types of data of root soil, associated plant species, diameter and branch height, ensuring the accuracy of the tracing results.

[0021] Visualization: Using GIS technology, the diffusion path of Canada goldenrod can be intuitively displayed, which is convenient for formulating prevention and control strategies.

[0022] Practicality: The method is simple to operate and suitable for tracing the Canada goldenrod in the process of large-area seedling transportation. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the application, not all. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0024] The application provides a technical solution: a method for tracing the source of an invasive plant, Canada goldenrod, which is diffused with seedlings, which consists of the following steps:

[0025] A1, sample collection: in the seedling planting area suspected to carry Canada goldenrod and the diffusion point caused by seedling transportation, the geographical coordinates, root soil color, plant species (Canada goldenrod and at least 8 other main plants) in the root soil range, and the specification attribute data (such as diameter, branch height, crown shape, tree shape) of the seedling are collected and recorded;

[0026] Root base soil, plant species (Canada goldenrod), diameter at breast height (DBH), crown form, tree shape, branching height of seedling are collected at the source of seedling.

[0027] Root base soil, accompanying plant species within the root base range, diameter at breast height (DBH), crown form, tree shape, and seedling wrapping of seedling are collected at the diffusion site of seedling.

[0028] The database of seedling source and diffusion site is respectively constructed; based on the above collected data, the data is recorded by using unified measurement standard, and the database of different source (including soil, accompanying plant (at least 8 species), diameter at breast height (DBH), crown form, tree shape) and diffusion site (including soil, accompanying plant (various), diameter at breast height (DBH), crown form, tree shape, wrapping) is respectively formed.

[0029] A2, soil classification: the Munsell color system is used, that is, the color three attributes, namely, hue, value, and chroma, are used as the basis to identify the color of root base soil, such as the color of red soil is 2.5YR4 / 8.

[0030] Root soil color: during the transplanting process of seedling, a certain amount of root base soil is often carried to ensure the nutrient supply during the transportation process of seedling, so the soil at a depth of 10-30 cm of the root of seedling is taken.

[0031] A3, data comparison and analysis: a three-step analysis strategy is used to accurately identify the source of Canada goldenrod carried by seedling;

[0032] Firstly, for each source data, cluster analysis is performed according to rhizosphere soil color, diameter at breast height (DBH), branching height, crown form, tree shape, and plant species, the grouping characteristics are viewed, and the significant difference of diameter at breast height (DBH) and branching height between different classification groups is tested, such as significant determination as the optimal grouping, because the diameter at breast height (DBH) of seedling in the same batch is usually the same; the difference of accompanying plant species in the group is checked and determined, if there is a difference, supplementary investigation is needed to ensure that the difference of plant species is not caused by sampling.

[0033] Secondly, for each diffusion site seedling data, cluster analysis is performed according to root base soil, diameter at breast height (DBH), crown form, and wrapping, the batch of seedling input in the diffusion site is identified, because there are different batches of input from different sources in many places; the difference of root base plant species within the same batch and between batches is compared; the native plants of the diffusion site are identified; at the same time, the difference of plants within the root base range of different seedlings in the same batch is compared, the tree pits without plants carried with root base soil are eliminated, and the influence of plant species difference on source analysis is reduced.

[0034] Thirdly, according to the soil, the diameter, the branch height, the crown shape, the tree shape and the plant species, the data after the arrangement are clustered, the source of the Canada goldenrod carried by the seedling is judged according to the clustering result, the clustering analysis result of the model is evaluated by using the model evaluation method, and if the accuracy is greater than 0.65, it can be determined that the analysis result of the model is reliable.

[0035] A4, traceability path construction: combining geographic information system and spatial distribution information of sample collection points, constructing the diffusion traceability path map of Canada goldenrod;

[0036] A5, risk assessment and prevention and control suggestion: according to the traceability result, the diffusion risk of Canada goldenrod is evaluated, and the source control and early monitoring and early warning targeted prevention and control suggestions are put forward.

[0037] Sample collection information table

[0038]

[0039]

[0040] It should be noted that, in this text, relational terms such as first and second are used merely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof are intended to cover non-exclusive inclusions, so that a process, method, article, or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or other elements inherent to such a process, method, article, or apparatus. Without more limitations, the statement "comprises a limited element" does not exclude the presence of additional identical elements in the process, method, article, or apparatus including the element.

[0041] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A method of tracing the spread of the alien invasive plant Solidago canadensis with nursery stock, characterized in that: Comprise the following steps: A1, sample collection: in the suspected carrying of the invasive alien species of Canada goldenrod nursery planting area and the spread point caused by the nursery, respectively, collect the geographic coordinates, root soil color, plant species in the root soil range, the specification attribute data of the nursery; A2, soil classification: using the Munsell color system, that is, based on the three attributes of color, namely hue, value and chroma, to identify the color of the root soil; A3, data comparison and analysis: using a three-step analysis strategy to accurately identify the source of Canada goldenrod carried by the nursery; A4, traceability path construction: combining geographic information system and spatial distribution information of sample collection points to construct the spread traceability path map of Canada goldenrod; A5, risk assessment and control suggestion: according to the traceability results, assess the spread risk of Canada goldenrod, and put forward the source control and early monitoring and warning targeted prevention and control suggestions; The analysis strategy in A3 comprises the following steps: First, for each source data, cluster analysis is carried out according to rhizosphere soil color, diameter, branch height, crown shape, tree shape and plant species, the grouping characteristics are viewed, and the significant difference of diameter and branch height between different classification groups is tested; The difference of associated plant species in the group is checked and determined; Second, for each nursery data in the spread area, cluster analysis is carried out according to the root soil, diameter, crown shape and cloth, and the batch of nursery input in the spread area is identified; The difference of plant species in the root soil of single tree in the same batch and between batches is compared; The native plants in the spread area are identified; At the same time, the difference of plants in the root soil range of different nursery trees in the same batch is compared, and the tree pits without plants carried with the root soil are eliminated; Third, for the sorted data, cluster analysis is carried out on all the data according to soil, diameter, branch height, crown shape, tree shape and plant species, the source of Canada goldenrod carried by the nursery is judged according to the clustering results, the clustering results of the data in the same source area and the classification results of the data in the spread area, and the clustering analysis results of the model are evaluated by using the model evaluation method.

2. The method of tracing the spread of invasive alien plant G. invasa with seedlings according to claim 1, characterized in that: In A1, the root soil of the nursery, the plant species, the diameter, the crown shape, the tree shape and the branch height of the nursery are collected in the source area of the nursery.

3. The method of tracing the spread of invasive alien plant G. invasa with nursery stock according to claim 2, characterized in that: In A1, the root soil of the nursery, the associated plant species in the root soil range, the diameter, the crown shape, the tree shape and the cloth of the nursery are collected in the spread area of the nursery.

4. The method of tracing the spread of invasive plant G. invasa with nursery stock according to claim 3, characterized in that: In A1, the databases of the source area and the spread area of the nursery are respectively constructed; based on the above collected data, the data is recorded by using unified measurement standard, and the databases of different source areas and spread areas are respectively formed.

5. The method for tracing the spread of the invasive alien plant *Solidago canadensis* along with seedlings according to claim 1, characterized in that: In A2, the root soil color: during the transplanting process, the nursery often carries a certain amount of root soil to ensure the nutrient supply during the transportation process, among which the diameter of the nursery carrying Canada goldenrod is 12-16 cm, and the soil in the root soil of 10-30 cm deep is taken.

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