CN115443901B - Breeding method of salicornia ovalifolia and repairing method of seaweed bed - Google Patents
Breeding method of salicornia ovalifolia and repairing method of seaweed bed Download PDFInfo
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- CN115443901B CN115443901B CN202211165221.5A CN202211165221A CN115443901B CN 115443901 B CN115443901 B CN 115443901B CN 202211165221 A CN202211165221 A CN 202211165221A CN 115443901 B CN115443901 B CN 115443901B
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- 241001474374 Blennius Species 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000009395 breeding Methods 0.000 title claims abstract description 17
- 241000201895 Salicornia Species 0.000 title claims abstract description 13
- 244000025254 Cannabis sativa Species 0.000 claims abstract description 53
- 235000013601 eggs Nutrition 0.000 claims abstract description 50
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000003337 fertilizer Substances 0.000 claims abstract description 42
- 238000013270 controlled release Methods 0.000 claims abstract description 41
- 239000004576 sand Substances 0.000 claims abstract description 35
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 24
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 24
- 239000011574 phosphorus Substances 0.000 claims abstract description 24
- 239000013535 sea water Substances 0.000 claims abstract description 21
- 239000000758 substrate Substances 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 210000004681 ovum Anatomy 0.000 claims abstract description 13
- 102000002322 Egg Proteins Human genes 0.000 claims abstract description 12
- 108010000912 Egg Proteins Proteins 0.000 claims abstract description 12
- 210000001161 mammalian embryo Anatomy 0.000 claims abstract description 11
- 230000001488 breeding effect Effects 0.000 claims abstract description 9
- 238000012258 culturing Methods 0.000 claims abstract description 3
- 238000009331 sowing Methods 0.000 claims abstract description 3
- 230000001605 fetal effect Effects 0.000 claims description 38
- 239000000463 material Substances 0.000 claims 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 12
- 239000011575 calcium Substances 0.000 abstract description 12
- 229910052791 calcium Inorganic materials 0.000 abstract description 12
- 230000012010 growth Effects 0.000 abstract description 9
- 235000016709 nutrition Nutrition 0.000 abstract description 9
- 230000035764 nutrition Effects 0.000 abstract description 9
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 abstract description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 abstract description 6
- 239000001301 oxygen Substances 0.000 abstract description 6
- 235000015097 nutrients Nutrition 0.000 abstract description 4
- 241001466077 Salina Species 0.000 abstract description 2
- 230000004083 survival effect Effects 0.000 description 22
- 150000001875 compounds Chemical class 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 10
- 238000002054 transplantation Methods 0.000 description 9
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 5
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 5
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 5
- 239000001099 ammonium carbonate Substances 0.000 description 5
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 5
- 235000019796 monopotassium phosphate Nutrition 0.000 description 5
- GNSKLFRGEWLPPA-UHFFFAOYSA-M potassium dihydrogen phosphate Chemical compound [K+].OP(O)([O-])=O GNSKLFRGEWLPPA-UHFFFAOYSA-M 0.000 description 5
- LWIHDJKSTIGBAC-UHFFFAOYSA-K potassium phosphate Substances [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 5
- 235000014653 Carica parviflora Nutrition 0.000 description 4
- 241000243321 Cnidaria Species 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 4
- 239000012634 fragment Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 235000003092 Artemisia dracunculus Nutrition 0.000 description 3
- 240000001851 Artemisia dracunculus Species 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 210000003754 fetus Anatomy 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- GOCUAJYOYBLQRH-UHFFFAOYSA-N 2-(4-{[3-chloro-5-(trifluoromethyl)pyridin-2-yl]oxy}phenoxy)propanoic acid Chemical compound C1=CC(OC(C)C(O)=O)=CC=C1OC1=NC=C(C(F)(F)F)C=C1Cl GOCUAJYOYBLQRH-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000270711 Malaclemys terrapin Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004578 fetal growth Effects 0.000 description 1
- 230000035784 germination Effects 0.000 description 1
- 235000021049 nutrient content Nutrition 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G33/00—Cultivation of seaweed or algae
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/40—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting fertiliser dosage or release rate; for affecting solubility
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
Abstract
The application provides a breeding method of salicornia ovalifolia, which comprises the following steps: collecting ovum She Xiyan grass embryo seedlings, sowing the embryo seedlings in the substrate, adding seawater, and culturing; the substrate comprises a particle controlled release fertilizer and calcium sand arranged on the particle controlled release fertilizer, wherein the mass ratio of nitrogen to phosphorus in the particle controlled release fertilizer is 8-15:1, and the particle size of the calcium sand is 200-3000 mu m. The application also provides a method for repairing the seaweed bed. According to the application, the seedlings of the egg She Xiyan grass embryo are directly collected, and the nutrition of the substrate is increased by controlling the nitrogen-phosphorus ratio of the controlled-release fertilizer, so that the growth of the egg She Xiyan grass is facilitated; meanwhile, nutrients are replaced by the seawater, the dissolved oxygen of the seawater is increased, the proper water temperature is kept, the breeding of eggs She Xi salina is promoted, and then the checkerboard plaque arrangement is carried out according to the proper plaque size, so that the rapid restoration of the seaweed bed is realized, and the restoration period of the seaweed bed can be obviously shortened.
Description
Technical Field
The application relates to the technical field of ecological restoration, in particular to a breeding method of salicornia ovalifolia and a restoration method of seaweed beds.
Background
Seaweed is a part of the three components of blue carbon, and has important ecological value, economic value and social value. The seaweed bed is distributed in coastal areas, particularly widely exists in subtropical areas, is an important habitat of marine animals, and has important functions of purifying water quality, preventing wind, fixing dykes and the like. In recent years, due to the influence of human activities, such as fishery activities, sand digging and other activities, the environment in which seaweed grows is seriously degraded, so that the area of a seaweed bed is greatly reduced, the global air temperature is increased, so that the growing places of some seaweeds gradually move to high-latitude areas, even the phenomenon that some seaweeds disappear or even vanish in some areas due to rapid changes of inadaptation habitat occurs, and the seaweed bed protection and restoration technology is needed to restore the area and biodiversity of the seaweed bed.
The current seaweed bed repairing method comprises three types of habitat methods, namely a habitat method, a seed method and a transplanting method, wherein the habitat method is to achieve the purpose of gradual recovery by means of natural propagation of seaweed through protecting, improving or simulating the habitat, the essence is natural recovery of the seaweed bed, and the method is long in recovery time and is a slower process. The seed method is to directly spread the collected seeds on the beach or buried in the substrate, the seeds are easy to drift along with water or get eaten, and the germination rate of the seeds is low. The transplanting method is to transplant the seaweed sheets or single mature plants from the healthy seaweed bed, and the method is relatively rapid and has strong operability, so that the method is favored. For example, chinese patent publication No. CN111492966a discloses a seedling raising method of tarragon, which can be used for repairing seaweed beds, by first implanting tarragon seeds with tips facing upwards into a substrate comprising calcareous sand and a controlled release compound fertilizer, and then germinating and raising the tarragon seeds, however, the method has a longer repairing period.
Disclosure of Invention
In view of the above, the application aims to provide a breeding method of salicornia ovalifolia and a repairing method of a seaweed bed, and the breeding method provided by the application can obviously improve the survival rate and the growth speed of seedlings of the egg She Xiyan grass embryo and shorten the repairing period of the seaweed bed.
The application provides a breeding method of salicornia ovalifolia, which comprises the following steps:
collecting ovum She Xiyan grass embryo seedlings, sowing the embryo seedlings in the substrate, adding seawater, and culturing;
the substrate comprises a particle controlled release fertilizer and calcium sand arranged on the particle controlled release fertilizer, wherein the mass ratio of nitrogen to phosphorus in the particle controlled release fertilizer is 8-15:1, and the particle size of the calcium sand is 200-3000 mu m.
The inventor creatively discovers that the terrapin She Xiyan grass has obvious fetal growth phenomenon, and can be used for breeding the fetal seedlings and repairing the seabed. The applicant creatively utilizes nutrient salts to promote the growth and development speed of the fetal seedlings, improves the repairing efficiency, shortens the repairing time of seaweed beds and increases the method for breeding the ova She Xiyan grass.
The application does not need to adopt the ovum She Xi salicornia species to germinate and then grow seedlings, but directly breeds with the ovum She Xiyan grass embryo seedlings. The application first collects the egg She Xiyan grass fetal seedlings, in some possible implementations, the fetal seedlings may be collected in a natural egg She Xiyan grass seaweed bed, specifically, may be collected after the fetal seedlings form root tips, may be collected manually or with tide, for example, the fetal seedlings may be collected as follows:
the seawater is gently stirred by using a dip net with the mesh of 0.2cm, the seedling with the fetus is suspended, and then the seedling with the fetus is lifted by using the dip net.
The fetal seedlings may also be collected as follows:
the method comprises the steps of obtaining fetal seedlings by using tidal water power, fixing a trawl with a net bag at the periphery of a seaweed bed, and driving the fetal seedlings to drift by using the water power generated when tide rises and falls, and collecting the fetal seedlings once every day or a plurality of days by the net bag of the trawl;
it can also be collected according to the following method:
the method comprises the steps of placing the gunny bag on a seaweed bed in the mature period of the fetal seedlings by using a barb formed by the fetal seedlings, lightly pressing and adhering the fetal seedlings, and then taking up the fetal seedlings.
After the fetal seedlings are collected, the fetal seedlings are sowed in a substrate, wherein the substrate comprises a particle controlled-release fertilizer and calcium sand arranged on the particle controlled-release fertilizer, the mass ratio of nitrogen to phosphorus in the particle controlled-release fertilizer is 8-15:1, and the particle size of the calcium sand is 200-3000 mu m.
Specifically, eggs She Xiyan grass can be bred in a pond, and the specific process is as follows:
a plurality of plastic supporting baskets with grids are arranged at the bottom of the pond, so that the subsequent transplanting is facilitated;
the bottom and the periphery of the plastic basket are paved with a fine net at the bottom of the pond, then the upper part of the fine net is sown with the particle controlled release compound fertilizer, then the calcareous sand is paved, then the seawater is added, and the grass embryo seedlings are sown with eggs She Xiyan for breeding.
In one embodiment, the plastic basket has a size of (30-60 cm) × (30-60 cm), preferably 50cm×50cm.
And paving fine meshes at the bottom and the periphery of the plastic basket, wherein the mesh size of the fine meshes is 0.05-0.2 mm, and preferably 0.1mm.
The granular controlled-release compound fertilizer is mainly composed of nitrogen, phosphorus and potassium and microelements required by plants according to different proportions, wherein the proportion of the microelements required by the plants is 49%, and the granular controlled-release compound fertilizer is prepared by a small granulator. In the granular controlled release fertilizer, nitrogen element is provided by ammonium bicarbonate, phosphorus element is composed of monopotassium phosphate, and the weight ratio of the nitrogen element to the phosphorus element is 10-15 times, namely the nitrogen-phosphorus ratio is 8-15:1, and is preferably 10:1. The inventor researches and discovers that in the granular controlled release fertilizer, the nitrogen-phosphorus ratio has a larger influence on the growth speed of the egg She Xiyan grass, when the nitrogen-phosphorus ratio is lower than 8:1, the nitrogen-phosphorus ratio has little influence on the growth speed of the egg She Xiyan grass, and when the nitrogen-phosphorus ratio is higher than 15:1, the egg She Xi haloxyfop is dead. In the application, the ratio of the total weight of the catalyst to the total weight of the catalyst can be 5-10 g/m 2 Preferably 7g/m 2 Broadcasting and increasing the nutrition of the substrate.
And then paving a layer of calcareous sand on the granular controlled release fertilizer, wherein the thickness of the calcareous sand is 5 cm-8 cm, and preferably 6-7 cm. The calcareous sand contains coral or shell fragments, has a loose pore structure, can promote the healthy growth of seaweed roots according to the dissolved oxygen content provided for the seaweed, contains alkaline substances, has a pH value of about 8.0-8.5, and can provide proper pH value for the seaweed to promote the growth of the seaweed. Experimental results show that the clay has high sulfide content and is easy to cover, and the survival rate of the egg She Xiyan grass is about 10-35%; the sea sand has low nutrition components, and the survival rate of the egg She Xiyan grass is about 25-65%; the calcareous sand with the granularity of more than 1cm can not fix single seaweed, and the survival rate of the egg She Xiyan grass is about 50-85%.
After the substrate is obtained, eggs She Xiyan grass embryo seedlings are sown in the substrate, for example, the substrate is sown at a position of 3-5 cm of calcareous sand to prevent the substrate from being washed away by seawater, and then seawater is added for breeding.
In one embodiment, natural tides can be used to fill the pond with seawater to a minimum level of 10-30 cm, preferably 15-25 cm, above the bottom of the pond, ensuring the minimum depth of seawater and allowing the eggs She Xiyan to be bred.
The inventor can increase the nutrient salt concentration in the substrate by collecting the egg She Xiyan grass fetal seedlings, and improve the survival rate and the growth speed of the egg She Xiyan grass fetal seedlings.
The application also provides a method for repairing the seaweed bed,
first, breeding ovum She Xiyan grass according to the method;
after the eggs She Xi salicornia are bred to have coverage rate of more than 50%, transplanting the salicornia to a seaweed bed area to be repaired, and placing plaques in a chessboard manner to repair the seaweed bed.
In the present application, the plaque size is (30 to 70 cm) × (30 to 70 cm), preferably (35 to 50 cm) × (35 to 50 cm), more preferably 40cm×40cm, and the survival rate of the egg She Xiyan grass can reach 75 to 95%. When the plaque is smaller than 30cm multiplied by 30cm, the survival rate of the egg She Xiyan grass is relatively low, for example, when the plaque is 5cm multiplied by 5cm, the plaque is easily covered by sediment, and the survival rate is 1-10%; when the plaque is 10cm multiplied by 10cm, the plaque is easily covered by sediment, and the survival rate is 5-30%; when the plaque is 20cm multiplied by 20cm, the survival rate is 30-50%. When the plaque is larger than 70cm×70cm, for example, 100cm×100cm, the work load and the cost are large.
According to the application, the seedlings of the egg She Xiyan grass embryo are directly collected, and the nutrition of the substrate is increased by controlling the nitrogen-phosphorus ratio of the controlled-release fertilizer, so that the growth of the egg She Xiyan grass is facilitated; meanwhile, nutrients are replaced by the seawater, the dissolved oxygen of the seawater is increased, the proper water temperature is kept, the breeding of eggs She Xi salina is promoted, and then the checkerboard plaque arrangement is carried out according to the proper plaque size, so that the rapid restoration of the seaweed bed is realized, and the restoration period of the seaweed bed can be obviously shortened.
Detailed Description
The application discloses a breeding method of salicornia ovalifolia and a repairing method of a seaweed bed, and the technical parameters can be properly improved by a person skilled in the art by referring to the content of the application. It is expressly noted that all such similar substitutions and modifications will be apparent to those skilled in the art, and are deemed to be included in the present application. While the application has been described with reference to preferred embodiments, it will be apparent to those skilled in the relevant art that various modifications and combinations of parts can be made in the practice and application of the application without departing from the spirit or scope of the application.
The method for breeding the egg She Xiyan grass and the method for repairing the seaweed bed provided by the application are further described below.
Example 1
Collecting the fetal seedlings in a natural egg She Xiyan grass seaweed bed, namely after the fetal seedlings form root tips, slightly stirring seawater by using a dip net with a mesh of 0.2cm, taking the fetal seedlings to suspend, and then taking the fetal seedlings by using the dip net;
placing a plurality of plastic baskets with grids at the bottom in the pond, wherein the plastic baskets are 50cm multiplied by 50cm in size, a layer of fine net (1 mm in thickness) with 0.1mm mesh is paved at the bottom and the periphery of the plastic baskets, the granular controlled-release compound fertilizer is broadcast at the upper part of the fine net, nitrogen elements in the granular controlled-release fertilizer are provided by ammonium bicarbonate, phosphorus elements consist of monopotassium phosphate, the weight ratio of the nitrogen elements to the phosphorus elements is 13 times, namely the mass ratio of the nitrogen elements to the phosphorus elements is 10:1, and the plastic baskets are manufactured by a small granulator, and the granular controlled-release fertilizer is distributed in the whole pond according to the weight of 7 g/square meter, so that the nutrition of a substrate is increased; paving a layer of calcium sand with the thickness of 7cm and the granularity of 200-3000 mu m on the granular controlled-release compound fertilizer, wherein the calcium sand contains coral or shell fragments, has the PH of 8.0-8.5 and has a loose pore structure;
the collected eggs She Xiyan grass fetal seedlings are scattered at the position 3-5 cm below the calcareous sand, the scattering density is 100 pieces/m, natural tides are utilized to pour seawater, the lowest water level is 20cm higher than the bottom of the pond, the lowest depth of the seawater is guaranteed, a wave making pump in the pond continuously works, the oxygen content of the water body is increased for about 10 days, when the coverage of eggs She Xiyan grass in the pond is more than 50%, the eggs are transplanted to an area needing to be repaired (the basket is reused), the plaque is placed in a chessboard mode, the size of the plaque is 40cm multiplied by 40cm, the maximum transplanting efficiency is achieved, the survival rate of eggs She Xiyan grass after transplanting is 95%, and the repairing period is 20 days.
Example 2
Compared with the embodiment 1, the difference is that in the granular controlled release fertilizer, nitrogen element is provided by ammonium bicarbonate, phosphorus element is composed of monopotassium phosphate, the weight ratio of the nitrogen element to the phosphorus element is 6 times, namely the mass ratio of the nitrogen element to the phosphorus element is 5:1, the granular controlled release fertilizer is prepared by a small granulator, the coverage of eggs She Xiyan grass in a 15-day pond is more than 50%, and the survival rate of eggs She Xiyan grass after transplanting is 45%.
Comparative example 1
The difference compared to example 1 is that no granular control fertilizer was applied, resulting in a coverage of > 50% for eggs She Xiyan grass in the 18 day pond and a survival rate of 50% for eggs She Xiyan grass after transplantation.
Comparative example 2
Compared with the embodiment 1, the difference is that in the granular controlled release fertilizer, nitrogen element is provided by ammonium bicarbonate, phosphorus element is composed of monopotassium phosphate, the weight ratio of the nitrogen element to the phosphorus element is 26 times, namely the mass ratio of nitrogen to phosphorus is 20:1, and the granular controlled release fertilizer is prepared by a small granulator, and the result is that the mortality rate of eggs She Xi in a pond is more than 70 percent.
Comparative example 3
Compared with the embodiment 1, the difference is that the granular controlled release fertilizer is characterized in that nitrogen element is provided by ammonium bicarbonate, phosphorus element is composed of monopotassium phosphate, the weight ratio of the nitrogen element to the phosphorus element is 52 times, namely the mass ratio of the nitrogen element to the phosphorus element is 40:1, and the granular controlled release fertilizer is prepared by a small granulator, and the result is that eggs She Xi salicornia in a pond of about 7 days die completely.
Example 3
Collecting the fetal seedlings in the natural ovum She Xiyan grass seaweed bed, namely, after the fetal seedlings form root tips, obtaining the fetal seedlings by using tidal water power, fixing a trawl with a net bag at the peripheral position of the seaweed bed, driving the fetal seedlings to drift by using the water power generated when tide rising and falling, and collecting the fetal seedlings once every day or a plurality of days;
placing a plurality of plastic baskets with grids at the bottom in the pond, wherein the plastic baskets are 50cm multiplied by 50cm in size, a layer of fine net (1 mm in thickness) with 0.1mm in mesh is paved at the bottom and the periphery of the plastic baskets, the granular controlled-release compound fertilizer is broadcast at the upper part of the fine net, the nutrition components of the granular controlled-release compound fertilizer consist of nitrogen, phosphorus and potassium in different proportions, the mass ratio of nitrogen to phosphorus is 10:1, the granular controlled-release fertilizer is distributed in the whole pond according to the weight of 7 g/square meter, and the nutrition of the substrate is increased; paving a layer of calcium sand with the thickness of 7cm and the granularity of 200-3000 mu m on the granular controlled-release compound fertilizer, wherein the calcium sand contains coral or shell fragments, has the PH of 8.0-8.5 and has a loose pore structure;
the collected eggs She Xiyan grass fetal seedlings are scattered at the position 3-5 cm below the calcareous sand, the scattering density is 100 per m 2, natural tides are utilized to pour seawater, the lowest water level is 20cm higher than the bottom of the pond, the lowest depth of the seawater is guaranteed, a wave making pump in the pond continuously works, the oxygen content of a water body is increased, after about 10 days, eggs She Xiyan grass in the pond are transplanted to an area needing to be repaired (the basket is reused), the plaque is placed in a chessboard mode, the size of the plaque is 40cm multiplied by 40cm, the maximum transplanting efficiency is achieved, the survival rate of eggs She Xiyan grass after transplanting is 93%, and the repairing period is 20 days.
Comparative example 4
Compared with example 3, the difference is that the calcareous sand is replaced by clay, the clay has high sulfide content and is easy to cover, and the survival rate of the transplanted ovum She Xiyan grass is 25%.
Comparative example 5
Compared with example 3, the difference is that the calcareous sand is replaced by the sea sand, the sea sand has lower nutrient content, and the survival rate of the transplanted ovum She Xiyan grass is 55%.
Comparative example 6
Compared with example 3, the difference is that the calcareous sand is replaced by calcareous sand with the particle size of more than 1cm, the calcareous sand with larger particle size can not fix single plant seaweed, and the survival rate of the transplanted ovum She Xiyan grass is 75%.
Example 4
Collecting the fetal seedlings in a natural egg She Xiyan grass seaweed bed, namely, after the fetal seedlings form root tips, placing the gunny bag sheets on the seaweed bed in the mature period of the fetal seedlings by using a reverse hook formed by the fetal seedlings, lightly pressing and adhering the fetal seedlings, and then taking up the fetal seedlings;
placing a plurality of plastic baskets with grids at the bottom in the pond, wherein the plastic baskets are 50cm multiplied by 50cm in size, a layer of fine net (1 mm in thickness) with 0.1mm in mesh is paved at the bottom and the periphery of the plastic baskets, the granular controlled-release compound fertilizer is broadcast at the upper part of the fine net, the nutrition components of the granular controlled-release compound fertilizer consist of nitrogen, phosphorus and potassium in different proportions, the mass ratio of nitrogen to phosphorus is 10:1, the granular controlled-release fertilizer is distributed in the whole pond according to the weight of 7g per square meter, and the nutrition of a substrate is increased; paving a layer of calcium sand with the thickness of 7cm and the granularity of 200-3000 mu m on the granular controlled-release compound fertilizer, wherein the calcium sand contains coral or shell fragments, has the PH of 8.0-8.5 and has a loose pore structure;
collected eggs She Xiyan grass fetal seedlings are scattered at the position 3-5 cm below calcareous sand, the scattering density is 100 pieces/m & lt 2 & gt, natural tides are utilized to pour seawater, the lowest water level is 20cm higher than the bottom of a pond, the lowest depth of the seawater is guaranteed, a wave making pump in the pond continuously works, the oxygen content of a water body is increased, after 10 days, when the coverage of eggs She Xiyan grass in the pond is more than 50%, the eggs are transplanted to an area needing to be repaired (the basket is reused), plaques are placed in a chessboard mode, the size of the plaques is 40cm multiplied by 40cm, the maximum transplanting efficiency is achieved, the survival rate of the eggs She Xiyan grass after transplanting is 94%, and the repairing period is 20 days.
Comparative example 7
The difference from example 4 is that the size of the plaque at the time of transplantation was 5cm×5cm, the plaque was easily covered with the deposit, and the survival rate of the egg She Xiyan grass after transplantation was 5%.
Comparative example 8
The difference from example 4 is that the size of the plaque at the time of transplantation was 10cm×10cm, the plaque was easily covered with the deposit, and the survival rate of the egg She Xiyan grass after transplantation was 10%.
Comparative example 9
The difference from example 4 is that the plaque size at the time of transplantation was 20cm×20cm, and the survival rate of the egg She Xiyan grass after transplantation was 35%.
Comparative example 10
The difference from example 4 is that the plaque size at the time of transplantation was 100cm×100cm, and the survival rate of the egg She Xiyan grass after transplantation was 95%, but the work load was large and the cost was high.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.
Claims (2)
1. A method of repairing a seaweed bed comprising the steps of:
breeding eggs She Xiyan grass: collecting ovum She Xiyan grass fetal seedlings, sowing the ovum She Xiyan grass fetal seedlings in the substrate, and culturing after natural tide is utilized to pour seawater; after the seawater is filled, the lowest water level is 10-30 cm higher than the bottom material;
the substrate comprises a particle controlled release fertilizer and calcareous sand arranged on the particle controlled release fertilizer, wherein the mass ratio of nitrogen to phosphorus in the particle controlled release fertilizer is 8-15:1, and the particle size of the calcareous sand is 200-3000 mu m; the dosage of the particle controlled release fertilizer is 5-10 g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The thickness of the calcareous sand is 5-8 cm; the ovum She Xiyan grass embryo seedlings are sown at the position 3 cm to 5cm below the calcareous sand;
when the eggs She Xi salicornia species are bred to have coverage rate of more than 50%, transplanting the salicornia species to a seaweed bed area to be repaired, and placing plaques in a chessboard manner; the plaque size was 40cm by 40cm.
2. The method for repairing a seaweed bed according to claim 1, wherein the mass ratio of nitrogen to phosphorus in the granular controlled release fertilizer is 10:1.
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