205 results about "Mangrove plants" patented technology

The invention discloses a method for increasing the elevation of an intertidal zone to form a suitable land for mangrove forest. The method mainly includes key steps of determining a target elevation; determining land reclamation boundaries; constructing cofferdams; constructing fences; implementing earth filling; flattening filled earth; constructing artificial tidal creeks; realizing temporary fixing measures; and the like. The inventor aims to increase the elevation of the intertidal zone by the aid of engineering means, requirements of mangrove plants on hydrology, sediment and other conditions can be rapidly met, the suitable land for the mangrove forest is formed and created, accordingly, afforestation success rate is increased, coastal ecological safety and sustainable development of China are promoted, and land safety and ecological safety of coastal zones are effectively maintained.

The invention relates to a potting technology for mangrove forest seedling cultivation, which is characterized by comprising the steps of 1) selecting a seedling cultivation field, wherein muddy inning intertidal zones with weak storm, low salinity and fresh water supply are selected; 2) cultivating the seedlings in a nutrition bag, wherein a seedling cultivation matrix is filled in the nutrition bag, and direct seedling cultivation with the nutrition bag is adopted for vivipary mangrove forest plants; 3) transferring the bagged seedlings into pots, wherein plantlet grows up after the seedling is cultivated for 0.5-1 year in bags according to the method of step 2, and then the plantlet is transplanted to a plastic seedling cultivation pot for seedling cultivation; 4) cultivating the potted seedling, wherein the seedling cultivation is carried out after the plantlet is transplanted into the plastic cultivation pot and arranged in a nursery garden, and water and fertilizer management, reshaping and trimming as well as pest control are strengthened in the seeding cultivation process; and 5) outplanting of the seedling, wherein the mangrove forest seedling is cultivated after the plantlet transplanted in step 4) grow for 1-2 years in the plastic seedling cultivation pot. At the time, the seedlings can be transferred out of the nursery garden to be used for recovery of the mangrove forest of the inshore intertidal zone and greening of the coastal intertidal zone. The seedlings cultivated by the technology disclosed by the invention has the characteristics of being high in degree of lignification of the stem, complete and dense in roots and the like; and compared with plantlets of the mangrove forest, the seedlings have stronger adaptive capacity to hard intertidal zones and severe growing environments.

The invention relates to a method of controlling the invasion of spartina alterniflora and restoring the ecological environment of mangrove by adopting the sonneratia apetala. The method is characterized by the steps: (1) pretreating the tidal flat of the spartina alterniflora invasion according to the requirement; (2) preparing the nursery stock of the sonneratia apetala; (3) planting the nursery stock of the sonneratia apetala according to the site condition and the thickness of the spartina alterniflora; (4) supporting and fixing the planted nursery stock; (5) pruning the undergrowth spartina alterniflora and planting the native mangrove after the crown closure and the fade-away or the complete fade-away of the spartina alterniflora. The spartina alterniflora starts the crown closure after a plantation of 1-1.5 years, the native mangrove including bruguiera gymnorrhiza and kandelia candel in the undergrowth of the spartina alterniflora can be planted after the sonneratia apetala gradually recesses to promote the formation of the community of rich biodiversity. The method adopts the fast-growing pioneer species of the sonneratia apetala to compete with the spartina alterniflora for fertilizer, water and sunlight, so as to cause the spartina alterniflora decline or death. The adopted sonneratia apetala has long growth period, large biomass, high stress resistance, easy plantation and good weed-suppressive effect.

The method of cultivating mangrove in tidal zone adopts bamboo tube fixing technology. Bamboo tube is formed through breaking the bamboo nodes while leaving part of the lowest one for fixing the root of mangrove seedling, forming wedge in the lower section for being inserted into soil, and forming small side crack. Soil and mangrove seedling are then set inside the bamboo tube for artificially cultivation, and the bamboo tube with survived mangrove seedling is inserted in tidal zone, where the mangrove seedling grows further first inside the bamboo tube and then in the mud land after the bamboo tube is broken gradually. The bamboo tube serves as the nutritious pot for fixing and protecting mangrove seedling.

The invention relates to an extraction method of mangrove plant DNA, comprising the following steps: (1) taking a leaf to grind, adding preheated 2% of CTAB extract to dissolve, and then adding 2 % of PVP by volume; (2) after water bath, adding a small quantity of RNase for heat preservation, then adding chloroform-isoamylol mixed liquor, and carrying out high-speed centrifugation at normal temperature; (3) putting supernate into a centrifuge tube, adding the preheated 2% of CTAB extract, adding chloroform-isoamylol mixed liquor, and mixing and carrying out high-speed centrifugation at normal temperature; (4) taking supernate and then putting into the centrifuge tube, adding NaCl solution and cold isopropanol, mixing, and putting and precipitating DNA at low temperature; (5) carrying out high-speed centrifugation at low temperature, abandoning the supernate, recovering the precipitate, washing by ethanol, air-drying, adding TE buffer solution, and storing at low temperature. The invention can effectively remove polysaccharide and tannin produced in the DNA extraction process, and the obtained mangrove plant has high DNA content and high purity.

A mangrove seedling and plantation methodology to upgrade the survival rate of mangroves by having seedlings grow in smaller pots; when grown to a certain extent the saplings being transplanted to hollow tube containers made of organic substances; the containers seated into a saline fish farm before being further relocated to seashore at certain spacings separated by footpaths between fields where roots are developed for saplings to grow into mangrove forests; and those organic containers being left to decay.

The invention relates to a processing technique of avicennia marina fruits. The avicennia marina fruits are made into avicennia marina fruit canned packs through fresh fruit raw material collection, sorting and grading, burning and shelling, dipping and debitterizing treatment, rinsing, trimming, separation, adding juice and caging, venting, can-sealing and sterilization, cooling, can-wiping, and labeling, or is made into avicennia marina bean glazed fruit product through confecting, adding juice, baking, vacuum encapsulation, cooling, packaging and labeling. The processing technique is a development for the food industrial production of mangrove avicennia marina fruits, the avicennia marina fruits are innovated food for researching the mangrove source, and has the efficacies of blood pressure reduction and curing angiocarpy, and has wide market prospect.

The invention provides a method of seed breeding for apetal mulberry of mangrove plant, comprising: immersing mulberry with water of 5 permillage of salinity and fresh water in turn, removing peel, sterilizing seed; choosing field, sterilizing bud bed; training seed bud with salt fresh water repeatedly and protection for cold-proof, which can increase seed germination rate, reduce breeding time and increase bud survival rate.

The invention provides a seedling breeding and cultivation method for excoecaria agallocha of mangrove plants. The method comprising the following steps that A, the land nearby a mud flat high-tide zone is selected as a nursery garden, the land is leveled, a drainage field ditch is formed, and disinfection is carried out; B, plants with the plant height not smaller than 3 m and without plant diseases and insect pests are selected as seed trees, and excoecaria agallocha fruits with the full form and yellow peels are harvested in June to August on the Gregorian calendar; C, harvested and disinfected excoecaria agallocha seeds are directly seeded in a substrate of the nursery garden, and sunshade treatment is carried out; D, alternate domestication is carried out through sea water and fresh water; E, after the excoecaria agallocha seedlings grow to 0.5 m to 1.5 m, transplantation and seedling toughening are carried out. The method has the advantages that cost is low, the seed germination rate is high, the transplantation range of the excoecaria agallocha is expanded, the seedling survival rate of the excoecaria agallocha seedlings is improved, and the wide development prospect is achieved.

The invention relates to the technical field of forest plating, and particularly relates to a method for planting a mangrove forest in a high-salinity deepwater sea beach. The method comprises the following steps: (1) preparing land; (2) planting; and (3) maintaining and managing the forest. Because no natural distribution of the mangrove forest exists in the deepwater sea beach, the mangrove forest cannot be successfully planted by adopting a conventional method; the mangrove forest can be planted in the high-salinity deepwater sea beach by adopting the method disclosed by the invention, the distribution area of mangrove forest wetland resource in a coastal region of South China is enlarged, the ecological function of protecting the coast by the mangrove forest is given a full play; water channels coexists in a mangrove forest restoration area, and thus a diversified environment is created so that a diversified living space can be provided for wildlife; meanwhile, in a mangrove planting area of the deepwater sea beach, by using the water channels in the mangrove forest, a natural ecological cultivating system in which the mangrove forest and the fishery industry coexist can be established, and the sustainable healthy development of the aquaculture industry in a coastal community is effectively promoted.

The invention relates to an ophiobolin di-sesquiterpene compound and a preparation method and application thereof. The preparation method produces the compound of novel structure by using Aspergillus ustus 094102 (culture collection number: CCTCC M 208153) separated from soil samples of the root system of mangrove plant Bruguiera gymnorrhiza in Touyuan town, Wenchang. Experiments show that the ophiobolin di-sesquiterpene compound can be used as cell proliferation restraining agent or antitumor agent.

The invention provides a fresh water acclimatization culture method of a mangrove plant, comprising acclimatization culture steps as follows: selection of well-developed Aegiceras corniculatum embryo, saline soaking processing with salinity of 2 per thousand, planting of the processed Aegiceras corniculatum embryo in a seedling culture bed and fresh water acclimatization culture for the planted Aegiceras corniculatum according to the set cycle and salinity gradient. By utilizing the method for fresh water acclimatization culture of the Aegiceras corniculatum of the mangrove plant, the survival rate can reach up to over 90%, the Aegiceras corniculatum of the mangrove plant after acclimatization can grow under the environment of light salt brine and completely fresh water and is suitable to be planted under wetland environment of lake, reservoir and estuary lake and reservoir and estuary, and the Aegiceras corniculatum of the mangrove plant plays an important role in soil and water ecological conservation of fresh water wetland systems.

The invention discloses a construction and creation method of an indigenous mangrove protection forest on a foreshore unsuitable for afforestation. The method includes the steps: a, planting an annual seedling forest of sonneratia apetala on the heavy-wind-wave foreshore, unsuitable for afforestation, 15-20 meters from a coast to construct a mangrove protection wall resisting wind waves, wherein planting distance of the sonneratia apetala is 1-2m, and line spacing is 1-2m; b, after the sonneratia apetala forest is planted for 2-3 years, planting biennial indigenous mangrove species on a vacant lot of a sonneratia apetala planting field, wherein planting distance of the indigenous mangrove species is 0.5-1m, and the line spacing is 0.5-1m. Exotic species and the indigenous species of mangroves are created on the heavy-wind-wave foreshore unsuitable for afforestation, restored mangrove wetland has rich biologic diversity and a good ecological function, coastal landscape is improved significantly as compared with that of a traditional forestation method, respective benign growing environment of the exotic species and the indigenous species is maintained, and normal growth of the indigenous species is unaffected; meanwhile, the indigenous mangrove protection forest has good wind wave resistance and functions of dam protection, siltation promotion and the like.

The invention discloses a construction method of near natural mangrove forests at reef shallows. Three layers of cofferdams sequentially including a first cofferdam, a second cofferdam and a third cofferdam are arranged, wherein the first cofferdam is formed through piling of hollow wave resistant blocks, and mangrove plants are planted; a pioneer protection layer is between the first cofferdam and the second cofferdam, a near natural recovery layer is between the second cofferdam and the third cofferdam, and local mangrove forest plants are planted; and a seedling supply layer is in the thirdcofferdam. According to the construction method of near natural mangrove forests at reef shallows, the pioneer protection layer is arranged outside, so that the effects of preventing wind and preventing waves can be achieved, destruction of the wind and the waves to the near natural recovery layer is decreased, and planting of the local mangrove forest plants in the near natural recovery layer isfacilitated; mangrove plantlets are cultivated in the seedling supply layer, and seedlings can be voluntarily and continuously supplied to the near natural recovery layer, so that long distance purchase and transportation of seedling sources can be avoided, and the production cost can be reduced; and three layers are divided, so that ecological stability and species diversity of mangrove forest communities are increased. The construction method disclosed by the invention is used for the field of mangrove forest planting.

The invention discloses a pot culture process method of a mangrove plant, comprising the steps as follows: a double-layer flowerpot consisting of a transparent externally sleeved flowerpot and a built-in flowerpot is created, tidal flat soil is filled in the built-in flowerpot as growing base, the mangrove plant seedling or the intact embryo is planted in the growing base, the artificial seawater is filled in the flowerpot for culturing the mangrove seedling or the embryo, the artificial seawater is filled in and discharged from the flowerpot per day for culture management of the planted mangrove plant pot by simulating the ebb and flow law of the semi-diurnal tides, and aerating roots are guided and shaped into the required appearance when the mangrove plant grows and forms well-developed aerating roots in the externally sleeved flowerpot. The pot culture process method successfully transplants the mangrove plant into the room for culture and develops into the pot art, combines the indoor air purifying functions with the aesthetic values of the mangrove plant and plays an important role in creating a healthy and comfortable lifting environment for people.

The invention discloses an extraction method for mangrove plant kandelia candel leaf total protein suitable for two-dimensional electrophoresis. A traditional trichloroacetic acid / acetone precipitation method for protein extraction and a traditional phenol extraction method for protein extraction are combined, a cosolvent SDS solution is introduced, the extraction process is optimized, and the Phe-B method suitable for extraction of the mangrove plant kandelia candel leaf total protein is established. The extraction efficiency and quality of the protein are effectively improved, and the technical scheme can be specifically suitable for extraction of the kandelia candel leaf protein in two-dimensional electrophoresis. The method has the advantages of being easy to operate, high in protein extraction efficiency and fewer in interfering substance, and is suitable for materials with difficult protein extraction, low protein extraction efficiency and more interfering substances. The extracted kandelia candel leaf protein completely meets the requirements of the first direction and the second direction of two-dimensional electrophoresis, a high-quality two-dimensional electrophoresis gel map with high resolution, more clear protein points, uniform distribution and the clear background can be obtained, and experiment repeatability and stability are good.

The invention discloses a mangrove plant big seedling transplantation protective cover and application thereof. The protective cover is barrel-shaped and is provided with no cover on the top or at the bottom, wherein the periphery of the cover body consists of a bamboo net; the interior of the cover body is fixedly arranged on the inner side of the bamboo net by using a plurality of fixing rods; and when the protective cover is used, the protective cover is sleeved from the space above a plant, and all the fixing rods and the bamboo net are partially implanted into soil. According to the mangrove plant big seedling transplantation protective cover, the impact of tide on a tree seedling can be reduced, bottom mud can be effectively prevented from being hollowed out by the tide, the survival rate of afforestation can be improved, particularly, the manual working time on tidal flat can be saved, and the resource is saved. The protective cover is made of a natural material, so that secondary pollution caused by an artificial synthetic material can be avoided, and the manual disassembly cost can be reduced through automatic rotting. The protective cover has the advantages of simple structure, low cost and convenience in use.

The invention belongs to the field of plant cultivation, and relates to a potted-planting seedling protecting method for mangrove plants. The method comprises the steps of transplanting, wherein the bottoms of flowerpots are laid with grid layers, then soil is put into the flowerpots, and mangrove hypocotyls are planted into the soil; low-temperature protection, wherein an antifreeze solution is sprayed to the main stalks of mangrove seedlings. According to the method, the bottoms of the flowerpots are laid with the grid layers so that the main roots of the mangrove seedlings can penetrate through bottom holes of the flowerpots and are broken during transplanting; the antifreeze solution is sprayed to the mangrove seedlings at appropriate time so that seedling leaves can be protected and safely pass the winter; the survival rate of the mangrove seedlings can be high, cold waves can be effectively resisted, and mangrove forests have great significance on popularized planting in a higherdimension; during seedling raising management, by simulating semi-diurnal tide rising and falling rules, seawater is irrigated into the flowerpots to simulate the natural living environment of the mangroves, and the physical conditions of the mangrove seedlings are improved; all parameters in all the steps of the method have a synergistic effect to commonly increase the survival rate of the mangroves during potted planting.

The invention relates to a cultivation system and a method for mangrove seedling distributed in the north of the border of mangroves. The cultivation system for mangrove seedling comprises waste heat recycling system and several sets of incubators; the incubator comprises mangrove plants, floating island sheet, planting cups, a cultivation case body, a supporting plate for floating island sheet, an emptying pipe, a vertical drain,a siphon standpipe, a blow-off pipe, overflow pipe, a water inlet. The waste heat recycling system provides warm water for each sets of the incubators. The cultivation method for mangrove seedling comprises the following steps: warm water source is produced by waste heat recycling system; sea mud is placed into the planting cup; environmental adaptation, sterilization and pest control are performed on the hypocotyl of mangrove plants and the mangrove plants are planted into planting cups; warm water is injected into the cultivation box; overflow of the overflow pipe is regularly checked and drain contamination treatment is carried out. The cultivation system and method for mangrove seedling fully utilize the waste heat resource, ensure the suitable water temperature for planting mangrove seedlings, realize the artificial cultivation of mangrove seedlings in high latitudes, and purify the water by using the developed roots of mangrove plants.

The invention discloses an ecosystem for purifying mariculture water by composite constructed wetland in a subtropical area, wherein the circulation system comprises a water utilization system and a purification system, the purification system comprises surface flow wetland, a seawater pond, subsurface flow wetland and a water delivery facility; the surface flow wetland is a pretreatment system which uses a water pump to lift water or is introduced with seawater by a natural tide storage mode, and salt-tolerant and low-temperature resistant mangrove plants are planted on a main body of the surface flow wetland; the seawater pond is a planktonic and bacterial micro-ecological regulation region for accumulating seawater treated by the surface flow wetland; the subsurface flow wetland is a strong degradation adsorption functional zone, middle and upper layers of seawater is introduced to the seawater pond through laying a water supply pipe, and a main body of the subsurface flow wetland is formed by connecting a biological sedimentation bed, an aerated packed bed and a gravel bed in series. The system is large in scale of water treatment, short in hydraulic retention time, comprehensive in removal of culture water-quality pollution indexes and good in ecological landscape, and further can produce aquatic by-products with higher economic values.

The invention belongs to the technical field of mangrove forest planting, and provides a method for planting the mangrove forest in the coast intertidal zone stormward face and a fixing device. The method comprises the following steps that mangrove sapling planting caves are dug at the selected positions; the mangrove saplings are planted into the planting caves, three layers of maintaining sand bags are accumulated in sequence, and the caves are covered with silt or gravel or other sand grains to be tamped, wherein the first layer of maintaining sand bag is an organic fertilizer-gravel sand bag, the second layer of maintaining sand bag is a fresh oyster shell-sand-soil sand bag, and the third layer of maintaining sand bag is a gravel sand bag or a silt sand bag or a bag of other sand grains; the mangrove saplings are planted according to the method to form the mangrove forest in the area; the mangrove saplings are fixed through the fixing device; guard piles are arranged at the offshore end 2-5 meter away from the front end of the low water line. According to the method, the mangrove forest can be planted in intertidal zones with different bottom materials, the purpose of preventing stormy waves is achieved, and the mangrove forest survival rate is high.

The invention discloses a seedling culture method for mangroves. The seedling culture method includes the steps: selecting a muddy inning intertidal zone with small wind waves, low salinity and fresh water supply as a seedling culture nursery, namely a seedling culture land; culturing seedlings in nutrition bags; culturing seedlings of seed mangrove plants on a seedling bed and then shifting the seedlings into the nutrition bags for culture; transferring the seedlings in the nutrition bags into pots; strengthening water and fertilizer management, pruning and pest control and prevention in the seedling culture process; and removing the seedlings from the nursery. The seedling culture method has the advantages that seasonal salt tide is avoided, pollution of seeds and seedlings caused by bacteria and the like is decreased, seedling culture survival rate is increased, the seedlings grow fast in the muddy inning intertidal zone or gateway as compared with a natural intertidal zone, and economic benefit is greatly improved as compared with seedling culture in the intertidal zone.

The invention provides a method for collecting native mangrove plant lumnitzera seeds and culturing seedlings. Mature lumnitzera seeds are collected, fallen seeds under trees are collected, the seedsgerminate after being aired, the seeds are evenly scattered on the surface of a seedling bed, a seeding bed medium is prepared by mixing peat soil, coco coir, red soil and river sand, the seedling bedis covered with a gauze element, a rooting powder solution is sprayed, and water is sprayed on the seeds on the seedling bed regularly two days after the rooting powder solution is sprayed so that the seeds can keep in a wet state; the seedlings together with soil around the seedling roots are transplanted into nutrient bags containing nutrient soil after the heights of the seedlings exceed 5 cm,brackish water is regularly sprayed so that the nutrient soil in the nutrient bags can keep wet, and a water-soluble fertilizer is applied; the seedlings together with the nutrient bags are transplanted into a nursery garden at a riverway estuary after the heights of the seedlings exceed 15 cm; lumnitzera seedlings are obtained after the heights of the seedlings exceed 30 cm. The method is suitable for seedling culturing of the mature seeds on plants and fallen seeds under trees, and the large-scale lumnitzera seedling culturing can be realized.

A cultivation method of high quality cuttings from semi-mangrove Cerbera manghas is characterized in that fruits on good, healthy mother trees with no pest or disease and growing for more 10 years are selected, seeds are extracted from the fruits by a fruit drying and husking machine, the seeds are soaked in hot water of 85 DEG C, the seeds are soaked at constant temperature after the seeds naturally cool to 40 DEG C, the seeds are sprouted on an electric heating sand bed with temperature of 20-25 DEG C and humidity of 60-80%, plantlets which sprout in a first batch, bear two pairs of complete leaves each and grow 10cm tall are transplanted to a seedling bed used for cultivating seedlings of Cerbera manghas, seedlings are cultivated on the seedling bed as a cutting bed, semi-lignified shoots are cultivated as cuttings, the cuttings are inserted in pots, each made with 2-4 parts of yellow subsoil and 6-8 parts of fine sand, to cultivate seedlings. The method has the advantages that the use of the electric heating sand bed increases sprouting rate of the seeds of Cerbera manghas and shortens cultivation time of mother plants of seedlings; slow release fertilizer as base fertilizer and quick-acting fertilizer is applied to the planted mother plants for topdressing, nutrition required by the mother plants during the initial growth period can be guaranteed, continuous supply of nutrition in the whole growth period is guaranteed, growth is fast, buds are many and strong, and seedlings are good in quality.

The present invention relates to a method of treating hypocotyl seedling, tuber or similar broodbody before planting. The lower hypocotyl of hypocotyl seedling is bound with a fixed rod to form a downward extending planting body which is inserted into mudbank during planting. Said method is simple and easy to out. The present invention can effectively raise the survival rate of mangrove forest up to more than 90%.

The invention discloses a mangrove plant Avicennia marina seedling raising method, which comprises the steps of seed collection and treatment, seeding, seedling management and seedling hardening and outplanting, wherein the seedling management comprises water management and fertility management. Avicennia marina seeds are put under sunshine after the Avicennia marina seeds are soaked in water to promote the germination of the seeds; when the seeds are interruptedly soaked in water, the seeds are slightly stirred to promote the aerobic respiration of the seeds and further accelerate the germination of the seeds; and since the situation that the seeds are rotted at the period when seedling height is 5-15cm, chlorothalonil is sprayed at an interval of 5 days to prevent the seeds from being rotted, the seeds can be prevented from being rotted and the survival rate is improved.

The invention discloses a mangrove extracting method and system in water and land regions of a remote sensing image. The method comprises the following steps of: acquiring remote sensing images of anarea to be studied; using remote sensing images to identify the water area of the area to be studied; using pseudocolor synthesis and image segmentation techniques to process the image outside the water body region to obtain multiple segmented images; removing images belonging to non-vegetation types from the segmented images to obtain multiple vegetation region images; using the NDVI arithmetic features, LSWI arithmetic features, texture features and topological features of the mangrove, classifying a plurality of the vegetation region images into a land mangrove image and a land non-mangroveimage. At the inner side of the water body region, the mangrove index is calculated by using the spectral response values of the pixel points at the fourth wave band and the spectral response valuesat the fifth wave band, and the mangrove pixels in the water are determined by comparing the calculated mangrove index values with the mangrove index threshold values. The method and the system of theinvention can improve the accuracy of mangrove spatial extraction.

The invention relates to a static box for measuring the methane transmission rate of mangrove forest trunks. The static box comprises a box body, the middle portion of the upper side surface of the box and het middle portion of the lower side surface of the box are respectively provided with a segment of a sleeve adapting to the diameter of a trunk in order to encasing the trunk, the box body is composed of a front half box body and a rear half box body which are oppositely laterally open to each other, the sleeves are correspondingly divided into front half sleeves arranged on the front half box body and rear half sleeves arranged on the rear half box body, and the box body is also provided with a sampling opening and a gas pressure balancing tube. The static box has the advantages of realization of accurate measurement of the methane transmission rate of the mangrove forest wetland woody plant trunks, simple structure, easiness in manufacturing, good portability and easiness in operation.

The invention relates to the medicine technical field, in particular to lanostane triterpenoid compound sexangulic acid extracted and separated from a Chinese mangrove plant Bruguiera sexangula, derivatives, a preparation method and a use thereof. The structural formula of the sexangulic acid and the derivative thereof are shown in the following formula, when R1 and R2 are simultaneously hydrogen, the compound is the sexangulic acid. A plurality of in vitro anti-tumor activity tests prove that the compound and the derivative thereof can obviously inhibit tumor cell activity and are expected to be applied to preparing anti-cancer drugs. The invention can provide a lead compound for developing new medicines for treating various common multiple cancers, and plays an important role in developing and utilizing living marine resources in China.