50 results about "Changjiang river" patented technology

The invention discloses a method for raising watermelon seedlings by dual-root-cutting grafting. The method mainly takes calabash as a stock and uses a dual root cutting technique and a cutting method to graft watermelon seedlings, and is applicable to areas in middle and lower reaches of Changjiang River. The method mainly comprises the steps of stock seeding, scion seedling, root-cutting grafting, management of root-cutting grafting seedlings, and the like. According to the technique for raising seedlings by dual-root-cutting grafting, the quality of commercial grafted seedlings can be effectively improved, the labor efficiency as well as the yield and quality of watermelons is improved, the production cost is lowered, and the method is a technique for raising the watermelon seedlings by grafting, which is worthy of popularization and capable of replacing traditional grafting methods.

The invention discloses a method for generating an electronic channel chart based on the Changjiang River standards, which is mainly based on the digital channel measurement data transmission standard of the Changjiang River, the digital channel measurement data verification standard of the Changjiang River and the electronic sea chart data protection scheme recommended by IHO (International Hydrography Organization), sets up a standardized electronic channel chart database of the Changjiang River by utilizing advanced computer network technology, data communication technology and geographic information processing technology, realizes the measurement and the management for channels over the Changjiang River, the generation of the electronic channel chart and the automation, integration and networking of the entire release process by means of the generation flow including data acquisition, data processing, editing of the channel chart, checking of the channel chart, release of the channel chart and application of the channel chart, and provide, in the form of browser, the latest electronic channel chart service for ships sailing on the Changjiang River, shipping related departmentsand enterprises and public institutions in time. The method has the obvious advantages of normative data format, complete data updating mechanism, mature business system, safe information protection mechanism, great advantage in popularization and the like.

The invention relates to a constructing method of hybridized megalobrama skolkovii culter with fast growth and few intermuscular bones. Distant hybridization is conducted between Qiantang River and Guangdong Dong River megalobrama terminalis as a female parent, and a novel and good combination of Changjiang River system culter alburnus being a male parent, distant hybridization is conducted, novel megalobrama skolkovii culter hybridization of the superior combination of Dong River megalobrama terminalis (female)*culter alburnus (male) F1 is screened out. With the four groups of self-bred progenies of megalobrama amblycephala (female)*culter alburnus (male) F1 hybrid offspring, megalobrama terminalis, culter alburnus and megalobrama amblycephala being a contrast group, differences like growth performance, shapes and intermuscular bone traits of MT (female)*CA (male) F1 hybrid offspring are compared and analyzed. Results show that 1, MT (female)*CA (male) represents remarkable hyper-parent growth advantages (P<0.05), and the total weight is also remarkably higher than MA (female)*CA (male); 2, Dong River megalobrama terminalis (female)* culter alburnus (male) F1 is the novel hybridized megalobrama skolkovii culter having the advantages that the intermuscular bones are reduced, deep processing of fish is promoted and the eating quality is improved.

The invention belongs to the technical field of aquatic livestock reproduction, and relates to a method for promoting the gonad maturing of pseudorasbora parva out of season. The method comprises the following steps of: (1) in the middle and lower reaches of Changjiang River, selecting pseudorasbora parva longer than 40mm and heavier than 1.0g in September to October, and carrying the pseudorasbora parva back with an oxygen bag as a parent; (2) soaking the pseudorasbora parva body in 2-3% saline solution for 5 minutes, and temporarily cultivating for 2 weeks in a circulating aquaculture system, wherein the daily feed is 5-8% of the pseudorasbora parva weight in the temporary cultivation period; (3) transferring the pseudorasbora parva into an aquarium with a circulating filtration and oxygen increasing device, wherein the density is 12 pseudorasbora parvas per aquarium; and controlling the water temperature to 22-24 DEG C, the light intensity on water surface is 400lux, and the illumination time is 16-24h / d; (4) feeding the pseudorasbora parvas in the morning and afternoon everyday; and (5) changing water once every 2 weeks, wherein 1 / 2 of the cultivation water is changed; and the physicochemical conditions of water are: the dissolved oxygen is greater than or equal to 7.5mg / L, the pH is 7.5-8.0, the ammonia nitrogen is less than or equal to 0.1mg / L, and the nitrite nitrogen is less than or equal to 0.01mg / L; and cultivating for 2 months to obtain the pseudorasbora parva with mature gonad development.

The invention provides the Changjiang River drainage basin information extracting and spatial coding method which comprises the following steps of (1), performing high resolution remote sensing image atmosphere correction based on an atmosphere radiation transmission model; (2), performing high resolution remote sensing image geographical correction based on a rational function model; (3), performing high resolution remote sensing image data embedding processing based on a Snake model; (4), performing high resolution remote sensing image data fusion processing based on wavelet transformation; (5), performing extraction based on object-oriented water body time-space information; and (6), performing water body information spatial coding based on a hierarchical classification method. The Changjiang River drainage basin information extracting and spatial coding method has advantages of 1), effectively realizing real-time monitoring and management for water environment and resource of the Changjiang River drainage basin; 2), supplying a scientific basis for the Changjiang River economic band development strategy, area ecology environment protection and planning; and 3), realizing suitability for spatial extraction and management of water body information in other drainage basins.

The invention discloses a construction method for a Y-shaped frame large-span steel box basket arch bridge. Firstly, the structural style of pre-stressed concrete spatial structure system, the vertical bridge tilt angle and horizontal bridge tilt angle of the fore-and-rear socle beams and the line-type and form of fracture thereof are confirmed and construction blocks are divided; secondly, a full-framing cast-in-place supporting structural style is determined, a formwork system is determined according to the inclined angle of the fore-and-rear socle beams, a line-type control method is determined according to the form of fracture of the fore-and-rear socle beams and concrete blocks are casted in sequence; finally, the pre-stressed concrete spatial structure system is formed. The method not only accords with the Y-shaped frame construction, but also can control the structural line-shape of the Y-shaped frame, thus having the characteristics of improving quality control ability, guaranteeing construction safety, reducing construction cost and enhancing construction progress. The large-scale pre-stressed concrete spatial structure system (Y-shaped frame) of Chongqing Caiyuanba Changjiang River Bridge constructed by the method is completely in accordance with the specification, and all technical and economic indicators meet the design requirements, thus the method has high efficiency.

The invention belongs to the technical field of wheat breeding and particularly relates to a method of quickly improving scab resistance of wheat in the Huang-Huai area. The method integrates ecotypicvarieties with the characteristics of higher stems, a loose plant type and wide and unrolled leaves in a wheat area in the middle and lower reaches of Changjiang River with ecotypic wheat varieties with the characteristics of many and large ears, short stems, lodging resistance, compact plants and leaves and upward leaves in the Huang-Huai wheat area on a basis of the conventional breeding technology, and quickly improves the scab resistance of the wheat in the Huang-Huai wheat area by comprehensively taking many technical measures such as additive generation in a different place, a molecularmarker technology and a haploid induction technology.

The invention discloses a plant growth conditioner for reducing damage caused by high temperature to rice, and a using method and application of the plant growth conditioner. The conditioner comprises gibberellin and salicylic acid, wherein the weight ratio of gibberellin to salicylic acid is (0.5-1.5):(0.15-0.6). The conditioner can also comprise chitosan oligosaccharide according to a certain ratio. When the conditioner is used, an aqueous solution form is adopted, wherein an aqueous solution is prepared from 50 to 150mg / L of gibberellin, 15 to 60mg / L of salicylic acid and 50 to 200mg / L of chitosan oligosaccharide, and is applied to leaves in a spraying way during the meiosis stage of pollen mother cells of rice, and 30 to 45 liters of aqueous solution is applied to each acre. The plant growth conditioner can be applied to reduce the damage caused by high temperature to rice, and is suitable for popularization and application in a rice culturing region on the middle and lower reaches of Changjiang River, particularly in a region at which the temperature in a flowering period is always high, and high and stable yield of rice is ensured.

The invention discloses a method for regulating a straight channel of a sand cobble bifurcated shoal of a transition section. The method for regulating the straight channel of the sand cobble bifurcated shoal of the transition section includes the steps that a wide and shallow cross section type long straight channel is developed in a dried bifurcated riverway of the transition section for navigation, meanwhile the water flow structure is adjusted by a regulating structure, and thus the sand delivery capacity in the navigation channel is enhanced. According to a method for discriminating the stability of the navigation channel of the sand cobble bifurcated shoal of the transition section, it should be guaranteed that bed loads entering the straight channel before and after the channel is excavated have the same starting conditions to guarantee the channel excavation stability, and in practical application, control is performed through bed load starting conditions under regulation flow. The method for regulating the straight channel of the sand cobble bifurcated shoal of the transition section is applied to regulation of the navigation channel of the Shenbei mouth of the Changjiang River and regulation engineering of the navigation channel of the Tonggu shoal of the Changjiang River, the shifting bed model test result shows that after the regulation, the navigation depth requirement is met, and the straight channel excavation stability is good.

The invention belongs to a crop planting technology and relates to a method for planting wheat by utilizing a straw substrate fertilizer. The method comprises the steps as follows: a, before sowing the wheat, taking the straw substrate fertilizer as a substrate fertilizer for treating soil, wherein 720-760 kg of the straw substrate fertilizer is used in 1 mu of the soil (1 mu is 1 / 6 of acre), and the straw substrate fertilizer is an organic fertilizer prepared by rotting and fermenting crop straws; b, sowing the wheat on November 10th to 15th along the middle and lower reaches of Changjiang River, wherein 12-14 kg of the wheat is sowed in 1 mu of the soil; and adding a nitrogen fertilizer twice in the crop growth process during the fourth leaf period and the second leaf period, wherein the addition amount of the nitrogen fertilizer is 20 kg of urea in 1 mu of the soil; and c, carrying out routine field management until crop harvesting. The method has the advantages as follows: 1, the straw substrate fertilizer is taken as a basic fertilizer, so that under the same nitrogen amount, the wheat growth is facilitated and the wheat yield is remarkably increased; and 2, the straw substrate fertilizer is continuously applied for multiple years, so that the soil structure is improved, the soil fertility level is increased, the usage amount of the nitrogen fertilizer can be properly reduced in the later period, and the cost is reduced.

The invention discloses a tea garden maintenance method through mixed culture of tea and chicken. The tea garden maintenance method through the mixed culture of tea and chicken includes the following steps: A, baby chick cultivation, baby chicks are brought in the middle of September at the middle and lower reaches of Changjiang River, and the brought-in baby chicks are cultivated for two mouths conventionally; B, tea garden stocking, big chickens are stocked in a tea garden, and chickens are stocked until July of the next year to be sold; C, field management, a, during growth period of tea trees, no pesticide and herbicide is sprayed on the tea trees, and no fertilizer is applied to the tea trees; b, tea tree fertilization, fertilizer is applied to the tea garden in December of every winter and February of the next year respectively, and the applied fertilizer is formed by mixed fermentation of chicken manure generated by the chickens and rape seed cakes; and D, tea leaf harvest, tea is harvested after the tea is grown. The tea garden maintenance method through the mixed culture of tea and chicken can increase effective utilization rate of the tea garden, can use the chicken manure as non-polluted natural fertilizer applied to the tea garden, achieves organic cultivation of the tea trees really, improves quality of the tea, is environmentally-friendly and free of pollution, and protects ecological environment of the tea garden.

The invention relates to a dormancy-breaking agent of an European large cherry cultivated out-door in the region at the south of the Changjiang River, and a dormancy-breaking method thereof, which are used for carrying out dormancy-breaking to the European large cherry and promoting the growth of an ovule and a megaspore. The dormancy-breaking agent is prepared by diluting a cyanamide solution of 50 percent to 1-2 percent and then being added with osmotic agent fatty alcohol polyethenoxy ether of 0.05 percent. The European large cherry is treated for two times. The first treatment is carried out about 30 days before the sprouting of the European large cherry and the whole branch of the European large cherry is sprayed up by using the dormancy-breaking agent; the second treatment is carried out after one week of the first treatment, and the same dormancy-breaking method is treated repeatly for consolidating the effects. The method is applicable to the large cherry varieties of 'early-red precious stone', 'red light', 'early-mahapphala', 'pioneer', 'Lapins' and the like. The dormancy-breaking agent has easy preparation and safe use, and can lead the European large cherry to sprout in advance for more than one week, with neat sprout and blossom, the flower quantity is increased, the percentage of fertile fruit is improved, the growth of the young sprout is promoted, the leaf area is increased and the fruit quality is enhanced.

The invention discloses a sustained-release oxidizing agent taking calcium peroxide as the matrix and ethyl cellulose as the coating and a preparation method thereof. The oxidizing agent is prepared from calcium peroxide (60%), a binding agent, attapulgite, and ethyl cellulose according to a certain ratio. The preparation method comprises the following steps: step A, evenly mixing calcium peroxide (60%), a binding agent, and attapulgite, and granulating the mixture to obtain particles with a size of 3 to 5 mm; step B, according to the weight of particles obtained in the step A, supplying enough ethyl cellulose, coating particles by ethyl cellulose, and drying to obtain the sustained-release oxidizing agent. The formula is reasonable, the method is feasible, and the operation is simple. The problem that calcium peroxide releases oxygen in gleying paddy fields in a short period is solved, the growth environment for paddy rice in gleying paddy fields is improved; after calcium peroxide is coated by ethyl cellulose, the oxygen release time is prolonged to 100 days or more, and, compared with that of calcium peroxide powder, the oxygen release time is prolonged by 58 days or more, in other words 1.4 times or more. The oxidizing agent has a great popularization and application value in the middle and lower reaches, which have many glyeing paddy fields, of Changjiang River.

The invention is a molecular-marking aided-decorating backcross-polymerization selecting-cotton method. Use Si-mian 3 in the Changjiang River valley as recurrent parent, and Shanxi 94-24 and 7235 series as anti-insect and good-quality aim-character supplying parent (non-recurrent parent), and respectively make them carry through hybridization and further backcross or self-cross for 2-3 generations, each of which adopts field observing method to comprehensively select agricultural character of recurrent parent, and adopts kanamycin fastness filtration, combination of anti-insect and detecting Bt gene's PCR detection and QTL molecule-marking aided-selection to respectively obtain destination middle material, and then make the material intercross, F1 generation self-cross aided with molecule-marking aided-selection to obtain new multiple-destination self-cross aided with molecular-marking

The invention discloses an establishment method and a fry culture method of a heterologous hybrid culter strain. The establishment method comprises the steps that erythroculter ilishaeformis in the Changjiang river system serves as a female parent, 'Pujiang No.1' megalobrama amblycephala serves as a male parent, artificial induced spawning, fertilization, hatching, fry culture and screening are carried out, and hermaphroditic fertile diploid hybrid culter F1 is obtained; the hybrid culter F1 and the male parent erythroculter ilishaeformis in the Changjiang river system are subjected to backcross, hatching and breeding are carried out, diploid hybrid culter F2 is obtained, and establishment of the heterologous hybrid culter strain is completed; the diploid hybrid culter F2 is subjected to self-cross, screening is carried out, hybrid culter F3 is obtained, hybrid culter F4 and hybrid culter F5 are obtained in the same way, and the stable heterologous hybrid culter strain is obtained. Compared with the prior art, by means of the establishment method of the heterologous hybrid culter strain, the novel hybrid fish, namely heterologous hybrid culter, which has the hybrid advantages of a high growing speed, tightly-closed scales, stable hypoxia resistance inheritance, hermaphroditic fertility and the like can be cultured, and great significance is achieved on the aspects of fish genetic breeding and biological evolution.

The invention relates to a method for storing seed in winter and cultivating ottelia acuminata in spring capable of improving germination rate, belonging to the field of reproduction and cultivation of living creature. The method comprises the following steps: maintaining the humid state of seed, embedding to a basin in which the substrate is loose and ventilated soil sand, soaking the basin in the water not lower than 5 DEG C for storage in winter; soaking the seed of ottelia acuminata in the water of 20-25 DEG C in the spring of the second year for about half a month; after the linear leaves and root come out in turn and the root is 3 cm in length, transplanting the seedling to a fixed planting basin and putting the basin to the water, and then transferring the seedling to a pool of 1-1.5 m in depth. The invention provides a method for transplanting the ottelia acuminata originally growing in the warm areas such as Guangdong and Yunnan to the middle and lower reaches of Changjiang River to make the same smoothly grow over the winter; the method can also maintain the fine activity of ottelia acuminata. The germination rate and the survival rate of seed of ottelia acuminate stored by the method are high; the method expands the growth area of ottelia acuminata and provides the condition for large-scale effective production and use of the ottelia acuminata.

The invention discloses a method for breeding pure yellow catfish all-female fish and super-male fish and producing all-male fish in large scale. The method comprises the following steps: screening wild original yellow catfish with excellent characters from the Changjiang river system, and using an artificial gynogenesis technology and a hormonal reverse method to establish a pure yellow catfish all-female fish germplasm bank; then using pure yellow catfish as a foundation, applying a GMT technology and a transsexual and test-crossing method to breed pure yellow catfish all-female fish and super-male fish, and establishing a super-male yellow catfish germplasm bank; combining super-male yellow catfish with pure all-female yellow catfish, establishing a full-male yellow catfish breeding system, and producing pure full-male yellow catfish fries in a large scale for breeding commercial fish. The method effectively overcomes successive-generation degeneration of yellow catfish germplasm, so that the disadvantage for culture benefit is reduced. The yellow catfish produced according to the technical route is pure in germplasm, high in stress resistance and environment-friendly, and an efficient, stable, healthy, environment-friendly, energy-saving and income-increasing reliable channel is provided for yellow catfish breeding industry with sustainable development.

The invention relates to a Changjiang river forbidden mining law enforcement work system based on a video image recognition technology. The Changjiang river forbidden mining law enforcement work system comprises a sand dredger normal light recognition early warning module, a sand dredger weak light recognition early warning module, a communication module, a system server and a remote monitoring terminal, the system server is also connected with a database module, the sand dredger normal light recognition early warning module or the sand dredger weak light recognition early warning module recognizes an illegal sand dredger and sends out an early warning signal, the communication module receives the early warning signal and transmits alarm information and an alarm picture to the system server, the system server processes the early warning signal and pushes the processed early warning signal to the remote monitoring terminal to realize an automatic alarm, an operator performs alarm receiving and alarm handling on an alarm signal on the remote monitoring terminal, and the database module records the alarm receiving and the alarm handling and writes the alarm receiving and the alarm handling into a system log. The work system provided by the invention can perform automatic recognition early warning on the illegal sand dredger in a monitoring area, law enforcement personnel do not need to watch over for a long time, and dependence degree on bandwidth of a video transmission network is relatively low.

The invention discloses a field selection method for ideal plant types of New Indic Rice in the rice areas of the middle and lower reaches of the Yangtze River. According to the ecological characteristics of the growing seasons of the rice in the middle and lower reaches of the Yangtze River, a selection mode and a field selection index are provided for the plant types of one-season Indic rice grains during the yellow maturity period. The key point of the invention is that a selection with three-high: high growing quantity, high storage quantity and high filling degree is established; according to the three-high mode, quantitative selection indexes for the individual and group plants are established. The individual selection indexes are shown as follows: big, erecting, sparse, solid, excellence and resistance; the selection indexes for the group plants are presented as follows; enough, strong, penetration, elegant and standing. When the single plant is selected, the comprehensive property is investigated; meanwhile, the behavior of individual plant in the group is also investigated; when the group plant is selected, the group structure is investigated and the single plant property is investigated at the same time. Individual plants are selected out of excellent group plants and the group plant is established by excellent individual plants; the process is repeatedly promoted to all seed raising generations, thus improving the selection effect. The improvement of single property is developed to the establishment of the comprehensive property; the qualitative analysis of configuration is developed as quantitative selection of the plant factors; the pure configuration design is developed as the improvement of comprehensive function, thus establishing the frame for the comprehensive selection of the ideal plant type of the New Indic Rice.

The invention provides a method for production of superior Stevia rebaudiana Bertoni. F1 generation seeds. The method for production of superior Stevia rebaudiana Bertoni. F1 generation seeds mainly comprises selecting an optimal Stevia rebaudiana Bertoni. planting region in China as a Stevia rebaudiana Bertoni. planting base, wherein the optimal Stevia rebaudiana Bertoni. planting region is located at the middle and lower reaches of Changjiang River and in Central and East China, utilizing two varieties of Zhongshan 2 and Zhongshan 3 having excellent quality, good agronomic characters, the basically same flowering phases and good compatibility as Stevia rebaudiana Bertoni. F1 generation seed parents, and carrying out propagation of seed production seedlings of which female parent and male parent amounts are the same by a cuttage asexual propagation method. The method for production of superior F1 generation seeds of Stevia rebaudiana Bertoni. sugar-yielding crops provides a fundamental and effective approach and a guarantee for solving the key problem of Stevia rebaudiana Bertoni. raw material quality improvement in the northern area, in other words for solving the key problem of superior Stevia rebaudiana Bertoni. F1 generation seed sources, provides the maximum possibility for promoting and accelerating the update of the superior Stevia rebaudiana Bertoni. varieties especially in the northern area, and is a technical method used for production of seeds of sugar-yielding commercial crops and having high application and popularization values.

The invention relates to a control method of wheat scab. The wheat scab is also named as rotten wheat head or red head miasma and is discovered all over the world, and the wheat scab is particularly most serious in midstream and downstream of Changjiang River of China and seriously wreaks havoc in middle-southern part of Hebei Province in China. The wheat scab is mainly harmful to the wheat, the wheat scab not only influences the yield of wheat, but also can cause the rot of the kernel of the wheat, toxin which is secreted by wheat scab harmful bacteria also can poison people and animals, the yield of the wheat can be reduced by 2 percent in ordinary years and can be reduced by more than 50 percent when the wheat scab is seriously prevalent, and even no kernels or seeds are gathered, so the wheat scab poses a grave threat to the wheat production.

The invention relates to an ultralow temperature water heater capable of being used at 25 DEG C below zero, which comprises a first system, a second system and a fluorine-fluorine plate-type heat exchanger, wherein the fluorine-fluorine plate-type heat exchanger is connected between the first system and the second system; the second system comprises a second compressor, a second condenser, a second throttle valve and a second flow separator; the fluorine-fluorine plate-type heat exchanger is respectively connected between a first condenser and a reservoir, and between the second throttle valve and a second flow separator; the second flow separator passes through the second compressor and is connected with the second throttle valve via the second condenser. The invention has the beneficial effects that the set of the invention can be used in the area north of the Changjiang River, improves the energy efficiency ratio of the water heater at a low temperature, and saves energy, thereby satisfying the current national energy conservation and emission reduction requirements.

A high-yield cultivation method of a tribute orange in a sloping field comprises the following steps: A, land selection: selecting a leeward and sunny sloping field with soil pH (potential of hydrogen) of 5.8-5.9, B, pit treatment: burying a 25-30 cm deep and 5-15 cm thick water retention mixture in an area with a perimeter of 3 / 5, 10-15 m beyond a crown drip line at the periphery of a pit, covering 5-10 cm soil on the upper surface of the water retention mixture, C, grafting, D, nutrient and water management, E, branch and leaf trimming and F, winter management, wherein the water retention mixture is prepared by mixing maize cob scraps and straw scraps at a mass ratio of 1:(0.5-2) and soaking with a 0.1-0.5% hydrochloric acid solution. The high-yield cultivation method of the tribute orange in the sloping field has the advantages that the high-yield cultivation method is scientific and reasonable, the tribute orange is high in yield and high in quality, and the method is particularly suitable for hilly areas on the north of the Changjiang River.

The invention relates to a steel plate fixing device and a fixing method for steel plate bonding construction. A steel plate is provided with a hole through which an anti-degumming bolt of a reinforcing component passes; the upper surface of the steel plate is provided with an anti-degumming washer and an anti-degumming nut; a lower nut, a lower washer, section steel, an upper washer, an elastic washer and an upper nut are arranged on the anti-degumming bolt in turn; and a woody wedge is arranged between the steel plate and the section steel. The fixing method comprises the following steps of coating the lower surface of the steel plate with steel bonding structural adhesive, installing the steel plate, the anti-degumming washer, the anti-degumming nut, the lower nut, the lower washer and the like on the anti-degumming bolt in turn, wedging the steel plate and the section steel, channel steel or angle steel by use of the woody wedge, screwing the upper nut and compressing the elastic washer. The method utilizes the anti-degumming bolt needed for bonding the steel plate, adopts a coating method to bond the steel plate, can construct under the circumstances of continuously opening traffic and having vibration, and has the advantages of short construction period, fast progress and little influence on society. The invention was used in a project of maintaining the second Changjiang River Bridge in Wuhan and got good effects.

The invention relates to a circular platform type mudflat construction reef and a construction method thereof, and belongs to the technical field of fish reefs. The circular platform type mudflat construction reef comprises hollow concrete cylinders and cross-shaped concrete piles; each cross-shaped concrete pile consists of three rod members which vertically intersect at a point in space; and thevertical parts of the rod members of the cross-shaped concrete piles are inserted and fixed in a mud flat, and the horizontal parts of the rod members are located at the upper surface of the mud flat; each hollow concrete cylinder is built on the corresponding cross-shaped concrete pile; and panes through which water passes are arranged around the hollow concrete cylinder. The fish reef providedby the invention can be conveniently installed at the surface of a sand beach and can be maintained for a long time; the fish reef has the characteristics of certain typhoon resistance, wind resistance, tide resistance and seawater corrosion resistance; the fish reef has obvious ecological restoration effects, and is particularly suitable for foundation of the sand mudflat of a Changjiang river estuary; a fish reef array has a large amount of water storage and large space for drilling, can be shaded, and can meet the needs of aquatic organisms for habitat, reproduction, and avoiding the sun and natural enemies.

The invention belongs to the field of electric power experimental equipment, and in particularly relates to an experimental water tank which is used for simulating a high-water-level region in the south of the Changjiang River to perform a soaking experiment on cable joints of 110kv and more than 110kv. A staircase is arranged on a box body of the water tank along the side surface in the width direction; a helical mount is arranged at the bottom of the box body of the water tank along the side surface in the length direction; a lifting ring for lifting is arranged at the top part of the box body of the water tank; universal wheels for moving the water tank are arranged at the bottom of the box body of the water tank; a water inlet and outlet pipe is also arranged at the bottom of the box body of the water tank; and a stainless steel ball valve is arranged at the port of the water inlet and outlet pipe. The experimental water tank is convenient, time-saving and labor-saving to transport and move, and experimental conditions in the water tank can be conveniently observed.

The invention discloses a device for collecting ChangJiang river coilia ectenes roes. The device is characterized by comprising a long conical net bag and a cuboid net cage; the net bag comprises an upper edge corkline with floats, a lower edge corkline connected with the net cage and a netting connected between the upper edge corkline and the lower edge corkline; the upper edge corkline is rectangular, the length of the upper edge corkline is set to be 400 cm, and the width of the upper edge corkline is set to be 30 cm; the distance between every two adjacent floats of the upper edge corklineis 80 cm; the lower edge corkline is arranged to be round, wherein the diameter of the lower edge corkline is 25 cm; the length of the netting is set to be 4-4.5 cm; a round hole with the diameter being equal to that of the lower edge corkline of the netting is formed in the side face of the netting, the length of the netting is set to be 100 cm, the width of the netting is set to be 40 cm, and the height of the netting is set to be 65 cm; a netting rack is arranged on the netting, and O-type holes for installing fixing rods are formed in the four corners of the netting rack respectively. Thedevice consumes low energy, and is easy to operate, low in cost and stable in yield; interference in parent coilia ectenes is effectively reduced, and the stress reaction of the coilia ectenes is reduced; the efficiency of collecting coilia ectenes roes is improved obviously.

The invention discloses refractory bricks prepared from pebbles in Changjiang River, and a preparation method of the refractory bricks. The refractory bricks are prepared from the following raw materials in parts by weight: 16-24 parts of the pebbles in Changjiang River, 24-38 parts of coal slime, 15-25 parts of boehmite, 12-23 parts of tailings of magnesite, 10-15 parts of spinel, 13-21 parts of silica powder, 16-28 parts of vanadium iron slag, 14-22 parts of andalusite, 15-25 parts of furnace ash, 25-35 parts of bauxite, 11-19 parts of phyllite, 8-14 parts of sulphite pulp and 10-15 parts of sediment in Yellow River. The pebbles in Changjiang River not only can be compounded with the raw materials such as the andalusite, the boehmite, the tailings of the magnesite and the spinel so as to be used as a refractory raw material of the refractory bricks, but also can be compounded with the raw materials such as the furnace ash, the sediment in Yellow River, the vanadium iron slag and the phyllite so as to be used as a filling material of the refractory bricks, so that the refractory bricks prepared from the pebbles in Changjiang River is excellent in comprehensive performance; the refractory bricks have the characteristics of being high in strength, high in refractoriness under load, good in high temperature resistance, high in acid and alkaline corrosion resistance, good in thermal shock resistance, and the like.