CN107963794B - Underwater lawn for low-transparency high-ammonia nitrogen bottom mud and construction method thereof - Google Patents
Underwater lawn for low-transparency high-ammonia nitrogen bottom mud and construction method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
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Abstract
The invention relates to an underwater lawn for low-transparency high-ammonia nitrogen sediment and a construction method thereof, and relates to the technical field of water ecological restoration. The technical scheme mainly adopted is as follows: the construction method of the underwater lawn for the low-transparency and high-ammonia nitrogen bottom mud comprises the following steps: respectively placing a plurality of seedling trays with a matrix containing an ammonia nitrogen adsorption layer, and cutting the seedling of the picrasma dens in the matrix; stacking a plurality of seedling trays in the vertical direction, wherein a preset distance is reserved between every two adjacent seedling trays; and (3) placing the whole body formed by the plurality of seedling trays in a water body to grow and cultivate the seedling of the picrasma denseflower. Solves the problem that the submerged plant cannot go through summer in the semi-fluid state sediment with high organic matters and ammonia nitrogen in the eutrophic water body submerged plant restoration project, and is particularly suitable for the recovery of the submerged plant with high pollution water body. The culture initial stage is not influenced by underwater illumination, the survival rate is high, and the water quality can be purified in the culture process, so that the purpose of improving the water quality and constructing the clear water grass type lake is achieved.
Description
Technical Field
The invention relates to the technical field of water ecological restoration, in particular to an underwater lawn for low-transparency and high-ammonia nitrogen sediment and a construction method thereof.
Background
In recent years, the quality of the surface water environment in China is stable, the section proportion of inferior V class is in a trend of continuously decreasing, but the water environment pollution in areas with relatively dense local population is still optimistic. The method is characterized in that the transparency of the water body is low, suspended matters are high, the water body is eutrophicated, submerged plants gradually die, the process of converting the dominant state of aquatic macrophytes into the dominant state of phytoplankton is accelerated, a series of ecological environment problems such as black and odorous water body, frequent water bloom and death of fish are caused, and meanwhile, the health of a human body and the normal exertion of water body functions are influenced.
At present, aiming at the treatment mode of the local water pollution, the growth of submerged plants is mainly recovered, and a clear water grass type water body is constructed, however, in specific practice, the submerged plants are difficult to survive in a large area due to the fact that the transparency of the water body is low or the ammonia nitrogen concentration in a sediment gap water body is increased due to high temperature in summer, so that stable populations or communities cannot be formed, and finally the construction of the clear water grass type water body fails.
Disclosure of Invention
The invention mainly aims to provide a novel underwater lawn for low-transparency high-ammonia nitrogen sediment and a construction method thereof, and solves the problems that in the eutrophic water body submerged plant restoration project, submerged plants cannot go through summer in the high-organic matter and ammonia nitrogen semi-fluid state sediment, and meanwhile, the survival rate of the environment of the low-transparency water body is low, so that the underwater lawn is particularly suitable for the recovery of the high-pollution water body submerged plants. The culture initial stage is not influenced by underwater illumination, the survival rate is high, and the water quality can be purified in the culture process, so that the purpose of improving the water quality and constructing the clear water grass type water body is achieved.
The aim and the technical problems of the invention are realized by adopting the following technical proposal. The invention provides a construction method of an underwater lawn for low-transparency high-ammonia nitrogen sediment, which comprises the following steps:
respectively placing a plurality of seedling trays with a matrix containing an ammonia nitrogen adsorption layer, and cutting the seedling of the picrasma dens in the matrix;
stacking a plurality of seedling trays in the vertical direction, wherein a preset distance is reserved between every two adjacent seedling trays;
and (3) placing the whole body formed by the plurality of seedling trays in a water body to grow and cultivate the seedling of the picrasma denseflower.
The aim and the technical problems of the invention can be further realized by adopting the following technical measures.
Preferably, in the method for constructing the underwater lawn with low transparency and high ammonia nitrogen bottom mud, the seedling raising tray positioned at the uppermost part of the plurality of seedling raising trays is a first seedling raising tray, and the distance between the first seedling raising tray and the surface of the water body is 30-50cm.
Preferably, in the method for constructing the underwater lawn for low-transparency and high-ammonia nitrogen bottom mud, an interval between two adjacent seedling raising trays is 30-50cm.
The aim of the invention and the technical problems can be achieved by adopting the following technical proposal. The invention provides an underwater lawn for low-transparency high-ammonia nitrogen bottom mud, which comprises the following components:
radix Et rhizoma Fagopyri Tatarici;
the substrate comprises a fixed layer, an ammonia nitrogen adsorption layer and a growth substrate layer which are sequentially arranged;
the fixed layer is made of degradable materials, one side face of the fixed layer is used for covering the surface of bottom mud at the bottom of a water body, the other side face of the fixed layer is connected with the ammonia nitrogen adsorption layer, and the picrasma quassioides grows on the substrate to cover the growth substrate layer.
Preferably, the distance between two adjacent close-tooth grass plants on the matrix is 2-6cm.
Preferably, the underwater lawn for low-transparency high-ammonia nitrogen bottom mud is characterized in that the fixed layer is formed by weaving degradable materials;
the thickness of the fixed layer is 1-3cm.
Preferably, the underwater lawn for low-transparency high-ammonia nitrogen substrate sludge is characterized in that the growth substrate layer is any one of a yellow soil layer, a clay layer and a red soil layer.
Preferably, the thickness of the growth substrate layer is 3-5cm.
Preferably, the underwater lawn for low-transparency high-ammonia nitrogen bottom mud is characterized in that the ammonia nitrogen adsorption layer is a zeolite powder layer.
Preferably, the thickness of the ammonia nitrogen adsorption layer is 2-4cm.
By means of the technical scheme, the underwater lawn for the low-transparency high-ammonia nitrogen bottom mud and the construction method thereof have at least the following advantages:
according to the technical scheme, the construction method of the underwater lawn for the low-transparency high-ammonia nitrogen sediment is characterized in that a plurality of seedling trays are stacked, and the low-light-resistance performance of the lower plant can be cultivated, so that the method can be suitable for a low-transparency water body, and the survival rate of the plant is remarkably improved; in addition, the conversion of nutrients between the sediment and interstitial water is accelerated at high temperature in summer, and a large amount of ammonia nitrogen is released to easily cause plant root rot, and the ammonia nitrogen adsorption layer is arranged in the culture substrate, so that ammonia nitrogen substances released by the sediment can be adsorbed, the death of the picrasma dens caused by the overhigh concentration of the ammonia nitrogen is avoided, and the survival rate after transplanting is further improved.
In addition, the underwater lawn for the low-transparency high-ammonia nitrogen bottom mud can be paved at the bottom of a polluted water body with low transparency, high suspended solids and eutrophication, is positioned on the surface of the semi-fluid state bottom mud of organic matters and ammonia nitrogen, improves the water body through the growth process of the underwater lawn for the low-transparency high-ammonia nitrogen bottom mud, improves the transparency of the polluted water body, adsorbs suspended particles and reduces the enrichment of nutrients, and a clean water grass type water body environment is constructed. The underwater lawn for the low-transparency high-ammonia nitrogen sediment has the following specific beneficial effects:
1. according to the technical scheme, the plant used in the underwater lawn with low transparency and high ammonia nitrogen bottom mud is the densefruit pittany root, and as the biomass of the densefruit pittany root is small, namely the densefruit pittany root develops rapidly in the growing process and the surface area of the leaf is not large, the densefruit pittany root can effectively consume the enriched nutrition in the water body and the overgrowth condition can not occur; the plant leaves of the picrasma quassioides can absorb the particulates in water, so that after the underwater lawns for low transparency and high ammonia nitrogen bottom mud are paved at the bottom of the polluted water body, the picrasma quassioides can improve the transparency of the water body by absorbing the particulates in water, and further improve the water quality; the grass of the Dendrocalanthema pallidum is a plant propagated by the underground stems and has strong propagation capacity, and the underground stems can rapidly form an integral lawn which is crossed together in the growth process, so the grass of the Dendrocalanthema pallidum has strong storm resistance; in addition, the densefruit pittany root is not influenced by seasons, can be evergreen in four seasons, can continuously improve the water body by growing all the year round, and has a certain landscape decoration.
2. According to the technical scheme, the fixing layer of the underwater lawn matrix with low transparency and high ammonia nitrogen bottom mud is made of degradable materials, can be degraded slowly along with the growth of the lawn, does not pollute water, can be made in a braiding mode, and can enable roots of the picrasma quassioides growing in the matrix to be rooted in gaps of the fixing layer, so that the effect of effectively fixing the picrasma quassioides is achieved; in addition, the fixed layer is covered on the surface of the bottom sediment of the water body, and covers the sediment pollutants, so that the pollution load released by the sediment can be obviously reduced.
3. According to the technical scheme, the ammonia nitrogen adsorption layer of the underwater lawn matrix with low transparency and high ammonia nitrogen bottom mud can adsorb ammonia nitrogen substances released by the bottom mud and diffused through the fixing layer, so that the content of the ammonia nitrogen substances in a water body is reduced, the root rot of the picrasma dens caused by the too high content of the ammonia nitrogen substances is avoided, and particularly the too high ammonia nitrogen content in a water body in a bottom mud gap caused by high temperature in summer can be absorbed, so that the root rot of the picrasma dens is avoided, and the survival rate of plants is ensured.
4. In the technical scheme of the invention, the growth substrate layer of the underwater lawn matrix for the low-transparency high-ammonia nitrogen substrate sludge can be formed by soil suitable for growth of the picrasma quassioides, and necessary nutrients are provided for growth of the picrasma quassioides.
The method provided by the invention can be used for cultivating the underwater lawn for the low-transparency high-ammonia nitrogen bottom mud, the underwater lawn for the low-transparency high-ammonia nitrogen bottom mud can be suitable for being paved in a water environment with low transparency, organic matters contained in the bottom mud and higher ammonia nitrogen, the survival rate of plants is effectively ensured, and the water quality of the polluted water body can be improved.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic flow chart of a method for constructing an underwater lawn for low-transparency and high-ammonia nitrogen sediment according to an embodiment of the invention;
fig. 2 is a schematic structural view of an underwater lawn for low-transparency and high-ammonia nitrogen bottom mud according to a second embodiment of the present invention.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following description refers to the specific implementation, method, structure, characteristics and effects of the underwater lawn for low-transparency and high-ammonia nitrogen bottom mud and the construction method thereof according to the invention by combining the accompanying drawings and the preferred embodiment. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
Example 1
As shown in fig. 1, a method for constructing an underwater lawn for low-transparency and high-ammonia nitrogen bottom mud according to an embodiment of the present invention includes:
101. and respectively placing a plurality of seedling trays with a matrix containing an ammonia nitrogen adsorption layer, and cutting the seedling of the picrasma dens in the matrix.
Specifically, the seedling raising tray can be a seedling raising tray commonly used in the prior art, and the size of the seedling raising tray can be customized according to specific needs; the substrate containing the ammonia nitrogen adsorption layer is used for planting the densefruit pittany root-bark, can be specifically arranged according to specific use environments, for example, can be a substrate with a fixing layer, a growth substrate layer and an ammonia nitrogen adsorption layer, wherein the fixing layer can be a degradable woven material for rooting of the densefruit pittany root-bark, the growth substrate layer can be a soil suitable for growth of the densefruit pittany root-bark, and the ammonia nitrogen adsorption layer can be a substrate for adsorbing excessive ammonia nitrogen at the bottom of a water body to ensure survival of the densefruit pittany root-bark; in addition, the matrix can be firstly placed in a seedling raising tray, then the seedlings of the picrasma denseflower are cut in the matrix, or the matrix can be integrally transplanted in the seedling raising tray after the seedlings of the picrasma denseflower are cut in the matrix.
102. Stacking a plurality of seedling trays in the vertical direction, wherein a preset distance is reserved between every two adjacent seedling trays.
Specifically, in order to enable the seedlings of the picrasma denseflower to grow in different water depth environments and enable the seedlings of the picrasma denseflower to receive different illumination effects, a plurality of seedling raising trays are stacked in the vertical direction, and therefore a lawn with a certain range of low light adaptability and strong low light resistance after transplanting can be cultivated.
In particular implementation, in order to realize the vertical state of placing of a plurality of seedling raising trays, can be with a plurality of seedling raising trays through tubular column or support series connection together, also can set up the body of water through the surface at the water, then will grow seedlings the mode that the tray is connected with the body of water through connecting rope, will grow seedlings the different depths of tray setting in water to and will a plurality of seedling raising trays interval preset distance vertical stack.
Further, the optimal interval between two adjacent seedling raising trays is 30-50cm.
103. And (3) placing the whole body formed by the plurality of seedling trays in a water body to grow and cultivate the seedling of the picrasma denseflower.
Specifically, the whole formed by a plurality of seedling trays needs to be placed in water to cultivate the seedling of the densefruit pittany root, and the adaptive water depth of the densefruit pittany root can not exceed 2.5m, so the depth of the seedling tray positioned at the lowest part of the plurality of seedling trays from the water surface can not exceed 2.5m; the seedling raising tray positioned at the uppermost part of the plurality of seedling raising trays is called a first seedling raising tray, and the optimal distance between the first seedling raising tray and the surface of the water body is 30-50cm. The cultivation time of the young seedling of the Dendrocala serrata can be determined according to specific conditions, the density of planting the young seedling of the Dendrocala serrata on the substrate, the actual cultivation water temperature and the like, so long as the young seedling of the Dendrocala serrata grows to reach a certain fullness finally, for example, the specific cultivation time can be one month or longer.
According to the technical scheme, the construction method of the underwater lawn for the low-transparency high-ammonia nitrogen sediment is characterized in that a plurality of seedling trays are stacked, and the low-light-resistance performance of the lower plant can be cultivated, so that the method can be suitable for a low-transparency water body, and the survival rate of the plant is remarkably improved; in addition, the conversion of nutrients between the sediment and interstitial water is accelerated at high temperature in summer, and a large amount of ammonia nitrogen is released to easily cause plant root rot, and the ammonia nitrogen adsorption layer is arranged in the culture substrate, so that ammonia nitrogen substances released by the sediment can be adsorbed, the death of the picrasma dens caused by the overhigh concentration of the ammonia nitrogen is avoided, and the survival rate after transplanting is further improved.
Example two
As shown in fig. 2, an underwater lawn for low-transparency and high-ammonia nitrogen bottom mud according to a second embodiment of the present invention includes: a herba Ardisiae Japonicae 1 and a matrix 2; the substrate 2 comprises a fixed layer 21, an ammonia nitrogen adsorption layer 23 and a growth substrate layer 22 which are sequentially arranged; wherein, the fixed layer 21 is made of degradable materials, one side surface of the fixed layer 21 is used for covering the surface of the bottom mud at the bottom of the water body, the other side surface of the fixed layer 21 is connected with the ammonia nitrogen adsorption layer 23, the densefruit pittany root 1 grows on the substrate 2 to cover the growth substrate layer 22.
The plant used by the underwater lawn for the low-transparency high-ammonia-nitrogen bottom mud is the densefruit pittany herb, so that the underwater lawn is suitable for being paved at the bottom of a water body with the water depth of not more than 2.5 meters, otherwise, the densefruit pittany herb can die due to low illumination, and the underwater lawn for the low-transparency high-ammonia-nitrogen bottom mud is suitable for improving the water quality of a shallow water body with the water depth of less than 2.5 meters, such as a shallow lake and the like, so that the water body forms a clear water grass type water body. Specifically, the picrasma quassioides is a plant of the genus picrasma of the family water turtle, which belongs to a perennial submerged plant, which can grow evergreen in four seasons, and the picrasma quassioides is a propagation of underground stems, has small biomass, mainly grows transversely, can be paved on the bottom of a water body, and can absorb a large amount of nutrient substances in the water body, namely can consume the nutrient substances enriched in the polluted water body; the matrix is used for planting the picrasma quassioides for growth of the picrasma quassioides, the fixed layer is made of degradable materials, for example, plant straws or bamboo and the like, and the fixed layer needs to have a plurality of gaps for rooting of the picrasma quassioides, so the fixed layer can be woven by the materials; the growth substrate layer is a foundation for growth and fixation of the picrasma quassioides and provides necessary nutrients for growth of the picrasma quassioides, so that any soil suitable for growth of the picrasma quassioides, such as the soil of the polluted water body; the ammonia nitrogen adsorption layer is an ammonia nitrogen substance released by absorbing sediment in a physical way, and can be made of a material with dense gaps.
The cultivation process of the underwater lawn for the low-transparency high-ammonia nitrogen bottom mud comprises the following steps: firstly, sterilizing raw materials for manufacturing a fixing layer, an ammonia nitrogen adsorption layer and a growth substrate layer, then paving the fixing layer, the ammonia nitrogen adsorption layer and the growth substrate layer in sequence in a seedling tray, and enabling the fixing layer, the growth substrate layer and the ammonia nitrogen adsorption layer to have preset thicknesses to form a substrate; then, cleaning and cutting the seedlings of the picrasma quassioides on a matrix formed by the fixed layer, the ammonia nitrogen adsorption layer and the growth matrix layer, enabling the roots of the seedlings to face the direction of the fixed layer, enabling the stems and leaves of the seedlings to be located on the upper surface of the growth matrix layer, and ensuring that each seedling has a preset distance; then, seedlings of the picrasma quassioides can be cultivated according to the method in the first embodiment, and when the seedlings grow to a size suitable for throwing, or when the fullness of the seedlings of the picrasma quassioides on the substrate reaches the throwing standard, the seedling raising tray can be taken out from the seedling raising water body; finally, the underwater lawns cultivated at different water depths and used for low-transparency high-ammonia nitrogen bottom mud are classified, so that the underwater lawns cultivated at different water depths and used for low-transparency high-ammonia nitrogen bottom mud can be paved at the bottoms of water bodies at different water depths correspondingly.
The underwater lawn for the low-transparency high-ammonia nitrogen sediment can be paved at the bottom of a polluted water body with low transparency, high suspended solids and eutrophication, is positioned on the surface of the semi-fluid state sediment of organic matters and ammonia nitrogen, improves the water body through the growth process of the underwater lawn for the low-transparency high-ammonia nitrogen sediment, improves the transparency of the polluted water body, adsorbs suspended particles and reduces the enrichment of nutrients, and a clear water grass type water body environment is constructed. The underwater lawn for the low-transparency high-ammonia nitrogen sediment has the following specific beneficial effects: because the biomass of the picrasma quassioides is small, namely the root system of the picrasma quassioides is developed rapidly in the growth process, and the surface area of the leaf is not large, the picrasma quassioides can effectively consume the nutrition enriched in the water body, and the situation of overgrowth does not occur; the plant leaves of the picrasma quassioides can absorb the particulates in water, so that after the underwater lawns for low transparency and high ammonia nitrogen bottom mud are paved at the bottom of the polluted water body, the picrasma quassioides can improve the transparency of the water body by absorbing the particulates in water, and further improve the water quality; the grass of the Dendrocalanthema pallidum is a plant propagated by the underground stems and has strong propagation capacity, and the underground stems can rapidly form an integral lawn which is crossed together in the growth process, so the grass of the Dendrocalanthema pallidum has strong storm resistance; in addition, the densefruit pittany root is not influenced by seasons, can be evergreen in four seasons, can continuously improve the water body by growing all the year round, and has a certain landscape decoration. The fixing layer is made of degradable materials, can be degraded slowly along with the growth of the lawn, does not pollute water, can be made in a braiding mode, and can enable roots of the dens draconis growing in the matrix to be rooted in gaps of the fixing layer, so that an effect of effectively fixing the dens draconis is achieved; in addition, the fixed layer is covered on the surface of the bottom sediment of the water body, and covers the sediment pollutants, so that the pollution load released by the sediment can be obviously reduced. The ammonia nitrogen adsorption layer can adsorb ammonia nitrogen substances released by the sediment and diffused through the fixing layer, so that the content of the ammonia nitrogen substances in the water body is reduced, the root rot of the picrasma denseflower caused by the too high content of the ammonia nitrogen substances is avoided, and particularly the too high ammonia nitrogen content in the sediment gap water body caused by high temperature in summer can be absorbed, so that the root rot of the picrasma denseflower is avoided, and the survival rate of plants is ensured. The growth substrate layer can be formed by soil suitable for growth of the picrasma quassioides, and necessary nutrient substances are provided for growth of the picrasma quassioides.
The method provided by the invention can be used for cultivating the underwater lawn for the low-transparency high-ammonia nitrogen bottom mud, the underwater lawn for the low-transparency high-ammonia nitrogen bottom mud can be suitable for being paved in a water environment with low transparency, organic matters contained in the bottom mud and higher ammonia nitrogen, the survival rate of plants is effectively ensured, and the water quality of the polluted water body can be improved.
As shown in figure 2, in the implementation, the distance between two adjacent close-tooth grass 1 on the substrate 2 is 2-6cm.
Specifically, in order to save the cultivation time and the cost, the distance between two adjacent plants of the picrasma quassioides can be controlled to be 4-6cm. The primary seedling density can be increased or decreased according to the time and cost conditions.
As shown in fig. 2, in an implementation in which the anchoring layer 21 is woven from degradable material; the thickness of the fixing layer 21 is 1-3cm.
In particular, in order to meet the rooting requirement of the picrasma dens, the fixing layer is preferably provided with a structure with a plurality of gaps, in addition, the underwater lawn for low transparency and high ammonia nitrogen bottom mud is provided for improving the water quality of polluted water, so that the fixing layer cannot pollute the water, and the fixing layer is preferably woven from degradable materials, so that the fixing layer has certain supporting strength, can be slowly degraded and meets the use requirement, and the thickness of the fixing layer is 1-3cm.
Further, the optimal thickness of the fixing layer is 2cm, and the fixing layer is formed by braiding any one of reed, bamboo or rice straw; alternatively, the fixing layer may be woven from any degradable plant straw or other material.
In the implementation, the yellow soil layer can be locally obtained, and is the most suitable material for the growth of the picrasma quassioides, so that the loess is selected as the most suitable growth substrate layer under the condition of considering the growth and the production cost of the picrasma quassioides; the growth substrate layer can also be any one of a clay layer, a greening soil layer or a red soil layer, wherein the greening soil can be configured according to the prior art, or can be configured according to the growth habit of the picrasma denseflower and the requirement on growth substances, and the invention is not limited in particular.
As shown in FIG. 2, further, the thickness of the growth substrate layer 22 is 3-5cm, with a thickness of 4cm being the most preferred.
As shown in fig. 2, in the implementation, the ammonia nitrogen adsorption layer 23 is a zeolite powder layer.
Specifically, the zeolite powder is formed by grinding natural zeolite rock, and the zeolite is an aluminosilicate mineral with a frame-shaped structure formed by volcanic lava, and has a stronger exclusive adsorption effect on ammonia nitrogen. Therefore, the zeolite powder is used as an ammonia nitrogen adsorption layer for adsorbing ammonia nitrogen substances mineralized by bottom sludge of the water body so as to prevent the ammonia nitrogen substances in the water body from exceeding the tolerance range of the odontoseisis due to excessive ammonia nitrogen substances in the bottom sludge mineralized water, and avoid the death of the odontoseisis, thereby ensuring that the underwater lawns mainly containing the odontoseisis and used for low-transparency and high-ammonia nitrogen bottom sludge can survive in the polluted water body.
As shown in fig. 2, further, the ammonia nitrogen adsorption layer 23 has a thickness of 2-4cm; wherein the optimal thickness is 3cm.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention in any way, but any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (9)
1. The construction method of the underwater lawn for the low-transparency high-ammonia nitrogen bottom mud is characterized by comprising the following steps of:
respectively placing a plurality of seedling trays with a matrix containing an ammonia nitrogen adsorption layer, and cutting the seedling of the picrasma dens in the matrix;
stacking a plurality of seedling trays in the vertical direction, wherein a preset distance is reserved between every two adjacent seedling trays;
placing the whole body formed by a plurality of seedling trays in a water body to grow and cultivate the seedling of the picrasma dens;
the substrate comprises a fixed layer, an ammonia nitrogen adsorption layer and a growth substrate layer which are sequentially arranged;
the fixed layer is made of degradable materials, one side face of the fixed layer is used for covering the surface of bottom mud at the bottom of a water body, the other side face of the fixed layer is connected with the ammonia nitrogen adsorption layer, and the picrasma quassioides grows on the substrate to cover the growth substrate layer.
2. The method for constructing an underwater lawn with low transparency and high ammonia nitrogen bottom mud according to claim 1, wherein the seedling raising tray positioned at the uppermost part of the plurality of seedling raising trays is a first seedling raising tray, and the first seedling raising tray is 30-50cm away from the surface of the water body.
3. The method for constructing an underwater lawn for low-transparency and high-ammonia nitrogen substrate sludge according to claim 1, wherein an interval between two adjacent seedling trays is 30-50cm.
4. The underwater lawn for low-transparency high-ammonia nitrogen substrate sludge according to claim 1, wherein the distance between two adjacent close-tooth grass plants on the substrate is 2-6cm.
5. The underwater lawn for low transparency, high ammonia nitrogen substrate sludge according to claim 1, wherein the fixed layer is woven from degradable materials;
the thickness of the fixed layer is 1-3cm.
6. The underwater lawn for low-transparency, high-ammonia nitrogen substrate sludge according to claim 1, wherein the growth substrate layer is any one of a yellow soil layer, a clay layer, or a red soil layer.
7. The underwater lawn for low transparency, high ammonia nitrogen substrate sludge as claimed in claim 6, wherein the thickness of the growth substrate layer is 3-5cm.
8. The underwater lawn for low-transparency high-ammonia-nitrogen bottom mud of claim 1, wherein the ammonia nitrogen adsorption layer is a zeolite powder layer.
9. The underwater lawn for low-transparency, high-ammonia-nitrogen bottom mud according to claim 8, wherein the ammonia-nitrogen adsorption layer has a thickness of 2-4cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710835409.9A CN107963794B (en) | 2017-09-15 | 2017-09-15 | Underwater lawn for low-transparency high-ammonia nitrogen bottom mud and construction method thereof |
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| CN201710835409.9A CN107963794B (en) | 2017-09-15 | 2017-09-15 | Underwater lawn for low-transparency high-ammonia nitrogen bottom mud and construction method thereof |
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| CN107963794A CN107963794A (en) | 2018-04-27 |
| CN107963794B true CN107963794B (en) | 2023-08-18 |
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