326results about How to "Promote healthy and sustainable development" patented technology

The invention discloses a remote sensing estimation method for grassland vegetation coverage, which belongs to the field of remote sensing applications. The method includes the steps of field test data collection and processing, Modis satellite data download and processing, data analysis and modeling, and precision inspection. The present invention establishes the ground spectral model for predicting vegetation coverage and corrects the Modis spectral model through ground hyperspectral tests, which is different from the methods of directly using satellite remote sensing data or using simple visual estimation and instrumental measurement and calculation in other similar researches, which helps to improve the prediction Accuracy is conducive to the scientific management and rational utilization of grassland resources, and has important practical significance for correctly evaluating the real production status of grasslands and sustainable use of grassland resources.

The technological process of treating papermaking effluent for reuse based on membrane integrating technique has membrane bioreactor, continuous membrane filter and reverse osmosis unit integrated for high efficiency treatment of papermaking effluent. The papermaking effluent treating process includes drum filtering and flocculating deposition to eliminate most suspended matter and colloid matter, anaerobic and aerobic biochemical treatment, filtering in membrane separating element, continuous membrane filtering, and treating with reverse osmosis membrane to reach the papermaking water standard. The present invention is especially suitable for treating hard-to-treat papermaking effluent.

A high-speed rail train driving method based on the section profile passenger flow includes the following steps that high-speed rail station information is obtained through a high-speed rail network operating system firstly, and a high-speed rail network is divided into a plurality of sections; the stop modes of high-speed rail trains are determined according to multiple grades; the O-D (origin-destination) demands of each section are classified according to the stop modes; the historical data about the actual O-D demands of each section are obtained, and the time varying demand of each type of O-D in each section is obtained through a linear second exponential smoothing prediction method; on the basis, the driving scheme unit of each section is made according to the sequence of the trains from the high grade to the low grade; all the driving scheme units are spliced and combined to form an initial train driving scheme; and finally, the scheme is adjusted to meet various restraint conditions and optimized through a simulation annealing algorithm, and each high-speed rail train is driven according to the optimization result. The high-speed rail train driving method based on the section profile passenger flow takes the benefits of the high-speed rail system and the passenger demands into account, and can improve the running benefits of the high-speed rail system.

The invention discloses a grassland dry matter mass remote sensing estimating method, which belongs to the field of remote sensing application. The method comprises the following steps of: collecting and processing field test data; downloading and processing Modis (Moderate Resolution Imaging Spectroradiometer) satellite data; analyzing and modeling the data and detecting the accuracy and the like. The method for establishing a ground spectrum model for predicating ground dry matter mass and correcting a Modis spectrum model through ground hyperspectral experiments is different from the method for directly predicating biomass liveweight by using NDVI (Normalized Difference Vegetation Index) data of the Modis remote sensing satellite in other like researches so that the grassland dry matter mass remote sensing estimating method is helpful for improving the predicating accuracy, is beneficial for scientific management and reasonable utilization of the grassland resources and has important practical significance in correct evaluation of the real productivity of the grassland and the sustainable use of the grass resources.

The invention relates to a diluent for preserving porcine semen at normal temperature. A total solute of the diluent comprises 45 to 55 percent by weight of monose combination, 15 to 25 percent by weight of amino acid combination and 25 to 35 percent by weight of electrolyte, buffer, antioxidant, stabilizing agent and antibiotics. Various substances are dissolved in double distilled water and a volume of 1, 000 milliliters is fixed so as to finally make an osmotic pressure of the diluent in the range of 330 to 360mosmo / L and make a pH value of the diluent in the range of 6.3 to 6.5. After theporcine semen is preserved at normal temperature in the environment of the diluent of the invention for 5 to 7 days, the viability can still be kept over 0.6 and the acrosom entire rate can reach 85 percent. When the porcine semen preserved by adopting the diluent of the invention is used for mating on 260 sows, the conception rate and the litter size reach 90.2 percent and 10.7 respectively and reach or exceed the levels of the import diluent. The diluent of the invention replaces the import bovine serum albumin with the monose combination and the amino acid combination, but the cost of the diluent of the invention is only 1 / 3 of that of the import diluent, so the production cost of artificial insemination of swines is reduced greatly.

The invention relates to a cultivation method of spotted maigre in seawater cage culturing industry, which pertains to the technical field of agriculture mariculture. By utilizing different starvation time produced by compensation growth mechanism of spotted maigre with different weight, the invention puts forward different feeding methods for spotted maigre with different weight; the feeding methods include daily feeding amount, feeding frequency and stocking density which is suitable with the feeding frequency. The feed utilization rate of feed by adopting the method of the invention is improved by 13.7 percent; labor cost and feed cost of the cultivation is reduced, the fat content of the cultured spotted maigre is 5 percent to 10 percent lower than that of conventional cultivation, while the protein content is increased by 10 percent to 15 percent, which is conducive to human health, and the output value is increased by 28.3 percent; the cultivation method of the invention has good economic benefit, is an innovative seawater cage culturing method and can be applied for popularization.

The invention relates to a concentrated harmless treatment method for excrement of the breeding industry, particularly relates to a method for concentrated harmless treatment of livestock excrements to produce methane and an organic fertilizer and harmless treatment of sick and dead animal bodies to produce the organic fertilizer, and belongs to technique and equipment required in the fields of resources and environments. The method comprises four parts of excrement treatment, production of the organic fertilizer, treatment of sick and dead livestock, and intelligent control; the four parts are mutually related and mutually complement functionally, the methane can provide energy to conveniently realize high temperature sterilization, the fermentation of the organic fertilizer also requires the temperature, meanwhile, an organic fertilizer fermentation strain is also helpful for making the fertilizer through fermenting the sick and dead livestock in the later period, and the intelligent control is central nervous of the system, and has huge actions on efficient treatment and improvement of the treatment efficiency. The treatment method is reasonable in structure, the system is equipped, intelligent and efficient, and the method is suitable for popularization and application.

The invention discloses a composite traditional Chinese medicinal sterilizing agent for a dairy farm which has no medicine residue and is environmentally friendly. The composite traditional Chinese medicinal sterilizing agent product is prepared by compounding traditional Chinese herbs such as gallnut, houttuynia cordata, coptis chinensis, scutellaria baicalensis, folium isatidis, herba andrographitis, radix isatidis, wild chrysanthemum flower, gingko, rhizoma acori graminei, magnolia officinalis, thyme, lysimachia christinae hance and the like in an ultrasonic auxiliary two-step extraction process. The composite traditional Chinese medicinal sterilizing agent has advantages the that the production process of ultrasonic auxiliary ethanol extraction of traditional Chinese herb and decoction is adopted in the preparation process of the composite traditional Chinese medicinal sterilizing agent, so that the aqueous soluble and alcohol soluble antibacterial active substances in the traditional Chinese herbs can be more adequately utilized; secondly, tween 80 and propanediol are added in the composite traditional Chinese medicinal sterilizing agent, so that the stability, adsorption property and viscosity of the sterilizing agent can be improved, and the effect of the composite traditional Chinese medicinal sterilizing agent can be further improved; thirdly, the product is environmentally friendly and safe, has no adverse effect on cow and has no problems such as medicine residue and drug resistance.

The invention discloses a special compound premix for Micropterus salmoides, belonging to the field of aquatic product feed and comprising compound vitamin, a complex mineral element, a yeast extract, chromium picolinate premix, bile acid premix and defatted rice bran. The invention can meet the nutrition requirements for healthy and rapid growth of the Micropterus salmoides. Compared with a control group, the use of the compound feed of the Micropterus salmoides can be prolonged to the adult fish period; the rate of body weight gain of the Micropterus salmoides is increased by 10-20 percent, and the bait coefficient is reduced by 10-15 percent; the liver has bright red color and is not swelling; the fat content is obviously reduced; the fish morbidity is obviously reduced; and the oxygen deficit resistance and the transport resistance are obviously increased. The special compound premix does not contain any antibiotic or forbidden drug and meets the national feed safety regulation. The raw material is easy to purchase and the production and the quality are easy to control.

The invention relates to a feed additive of aquaculture industry, in particular to a meat quality flavor modifying agent for grass carp or carp and a preparation method thereof. Each kilogram of modifying agent comprises the following components: 30 to 50g of seaweed extract, 10 to 20g of combination of inosinic acid and guanylic acid, 20 to 30g of carnitine, 15 to 30g of glycin, 10 to 20g of alanine and the balance of zeolite powder. The preparation method comprises the following steps: firstly, crushing solid materials in the seaweed extract, the combination of inosinic acid and guanylic acid, the carnitine, the glycin, the alanine and the zeolite powder materials and sieving the crushed solid materials through a sieve with 80 to 100 meshes for later use; and secondly, mixing and stirring the crushed solid materials in the proportion to ensure that the coefficient of variation CV of the uniformity is less than 5 percent to obtain the product. The modifying agent can effectively improve protein content, content of total amino acids, content of essential amino acids and content of delicious amino acid in muscles of the grass carp and the carp.

The invention discloses an enzyme preparation method of sea collagen peptide capable of promoting the wound healing. The method comprises the following steps: (1) removing other proteins and impurities from by-products of orange rock-fish processing, opening the three-strand helical structure of collagen; (2) adding acid to extract the pre-treated collagen from the by-products of orange rock-fish processing, freeze-drying the obtained collagen, and saving the freeze-dried collagen as the substrate to prepare collagen peptide through enzymolysis in the next step; (3) adding water into the freeze-dried collagen to prepare a collagen solution, adding protease into the collagen solution to carry out enzymolysis so as to convert collagen into collagen peptide; (4) deactivating the enzyme, cooling; (5) removing the fishy smelling, decoloring; (6) subjecting the collagen peptide to centrifugation, saving the supernate for later use; (7) carrying out membrane separation to collect the collagen peptides with a molecular weight of 1000 to 3000 Da; (8) condensing the separated collagen peptides through rotation evaporation; (9) freeze-drying the condensed collagen peptide into powder. High bioactivity biological active peptide capable of healing the wounds is prepared from by-products of orange rock-fish processing through an enzyme method assisted by a membrane separation technology.

The invention provides a deep water well shed holothurians breeding method, and is characterized in that (1) fry stocking: the fry specification is 3-5cm, the stocking density in the prophase of the breeding is 40-60 heads per m2, and the fry is required to be sanitized before stocking; (2) breeding managing: a deep water well shed whose sea water temperature is 12-17 DEG C and whose salinity is not less than 25 per thousand is selected, slight flow raising method is adopted during the growth period, the daily flux is 1-3 times of the raising water, and air charging breeding is adopted when the water flows; sea mud, tail algae powder, and kelp power and auxiliary forage are fed 1-2 times every day, and the feeding amount is 1-5 percent of the weight of the holothurians. Taking full use of the establishment of the existing deep water well shed, breeding the holothurians effectively and healthily, the invention is easy to be operated and managed, and the invention can save energy and lower the consumption, can save water and reduce pollution, and can reduce the breeding period, as well as improve the breeding efficiency greatly.

The invention provides a method for detecting the content of tetrabromobisphenol A, decabromodiphenyl ether and hexabromocyclododecane brominated flame retardants in an aquatic product. The method is characterized by comprising the following steps that the content of the tetrabromobisphenol A, decabromodiphenyl ether and hexabromocyclododecane brominated flame retardants in the aquatic product is measured by establishing accelerated solvent extraction-fast liquid chromatography-tandem mass spectrometry, an aquatic product sample needing to be detected is separated through a C18 chromatographic column, gradient elution is conducted by taking water and methyl alcohol as mobile phases, detection is conducted in a mass spectrum multi-reaction monitoring mode, the matrix standard is corrected, quantitative determination is conducted through an external standard method, and confirmation is conducted. The detection method has the advantages that operation is easy and convenient, and detection is fast and accurate; by establishing the method for simultaneously detecting the tetrabromobisphenol A, decabromodiphenyl ether and hexabromocyclododecane brominated flame retardants in the aquatic product, physical health and life safety of consumers are guaranteed, a great practical significance is achieved for promoting sustainable and healthy development of aquatic product processing industry, and a beneficial technical reserve is provided for a food industry supervision department and a detection mechanism.

The invention discloses integrated and comprehensive water treatment equipment for electrochemical water. The equipment comprises a first-level strong magnetizer, at least one second-level water electrolysis reactor, a third-level filter and a fourth-level ultraviolet sterilizer which are sequentially communicated through pipelines. The equipment disclosed by the invention belongs to the integrated innovation of physical sterilization and algae removal comprehensive techniques; viruses, bacteria and algae in the water are effectively killed after multilevel sterilization and algae removal treatment; the water quality is guaranteed to be healthy; the treated water has the functions of continuous sterilization, disinfection and algae removal due to the presence of a strong oxidant. The equipment is widely applied to the roe incubating rate increasing of aquaculture, the aquaculture wastewater treatment and the live fish clean culture as well as aquatic food processing, disinfecting and sterilizing; and the equipment has the advantages that the sustainable and healthy development of aquaculture industry is promoted, the aquatic food safety at the source is guaranteed and safe and pollution-free food for people is provided.

The invention relates to a method for cultivating high-yield and high-quality winter wheat by use of biogas liquid. The method mainly comprises the following steps: soaking seeds with biogas liquid at 16-20 DEG C for 8-12 hours before seeding; applying 11-20 kg of urea per 667 m<2> in combination with intensive farming land preparation or irrigation of soil moisture; at the later period of wheat jointing, applying 3,000-6,000 kg of biogas liquid per 667 m<2> in combination with irrigation of soil moisture, wherein the nitrogen dosage for topdressing is 50-75% of the conventional dosage of nitrogenous fertilizer; and spraying biogas liquid at the middle-and-later period of wheat, wherein 35-45 kg of biogas liquid diluted by 0.5-1 times is sprayed per 667 m<2> at the booting period, 35-45 kg of stock biogas liquid is sprayed per 667 m<2> at the pustulation period, and a proper amount of kerosene, washing powder and monopotassium phosphate is dissolved and sprayed 1-2 times in the pustulation period. The biogas liquid using method is convenient and practical, has low cost, reduces the pollution of nitrogenous fertilizer and serious adverse impact of pesticide residue in the production of high-quality wheat, improves the seed quality, and realizes cultivation of high-quality wheat, resource utilization of agricultural waste and sustainable development of agriculture.

The present invention discloses one kind of recombinant plasmid containing grass carp interferon gene with the nucleotide sequence as shown in SEQ ID No. 1. The present invention also discloses engineering bacterium INVSC1-pYES2-IFN as one kind of Saccharomyces cerevisiae in the preservation number of CGMCC1847. The engineering bacterium is used for aquatic animals to resist viruses. The present invention also discloses the application of protein coded by the recombinant plasmid containing grass carp interferon gene with the nucleotide sequence as shown in SEQ ID No. 1 for aquatic animals to resist viruses.

The present invention relates to a high-activity microbial protein forage and a preparation method thereof. The microbial high-activity preparation comprises the following components: 10%-20% of photosynthetic bacteria, 20%-40% of lactobacilli, 10%-20% of Saccharomyces cerevisiae Hansen, 20%-30% of bacillus subtilis, and 10%-20% of bifidobacteria. The microbial protein forage comprises the following components: dried fish, blood powder, soybean, soybean meal, peanut meal, DDGS forage, calcium hydrogen phosphate, salt, soybean oligosaccharides, microbial high-activity preparation and vitamin composite premix. In preparation, high-temperature puffing and stirring are performed on the dried fish, blood powder and soybean. The components such as soybean meal, peanut meal and DDGS forage are added. The microbial high-activity preparation is sprayed for being added, and then vacuum packaging is performed. The microbial preparation can also be adopted for preparing mixed forage for grices. The microbial high-activity preparation of the invention can be fed directly and has high feeding safety. The microbial high-activity preparation can be widely used for ecological cultivation of livestock, poultry and aquatic product. The high-activity microbial protein forage has the following advantages: improving forage conversion rate of the pig, preventing disease and treating disease, improving survival rate, purifying environment, reducing breeding cost, obtaining obvious yield and income increasing effect, and obtaining good popularization value.

The invention discloses a lactating sow feed additive capable of effectively improving lactation yield and boosting immunity, and belongs to the field of feed additives. The additive comprises vaccaria segetalis powder, flammulina velutipes polysaccharide, fingered citron powder, manyprickle acathopanax root powder, leonurus powder, microecologics, a yeast cell wall extract, montmorillonite, vitamin C, vitamin B12, lysine, valine, methionine, phytase, ferric sulfate and carriers, wherein the carriers are zeolite powder and defatted rice bran. The additive can effectively improve the lactation yield of a sow to facilitate the healthy growth of piglets; besides, the additive can further improve the intestinal health of a sow, regulates the metabolic function, and improves the immunity of the sow, thereby having very wide application aspect.

The invention provides a plantation method of exocarpium. The plantation method comprises following steps: breeding of nursery stock, land selection, soil preparation, fixed plantation, water and fertilizer management, field management and pest and disease control. Firstly, seeds of sugar trees are selected and then cultivated to be resistant rootstock seedlings. Next, budding technology is utilized for rational management of grating seedlings for virus-free seedlings of improved varieties. What is more important is that virus-free seedlings of improved varieties are successfully tested in Guang Xi province. Fertilizers are applied

The present invention discloses one kind of prawn feed additive. The prawn feed additive is compounded with Chinese herbal medicine powder in 8-12 weight portions and solid lichen-forming bacillus material in 12-18 weight portions. The Chinese herbal medicine powder is prepared with isatis root, forthythia, astragalus root, agastache, Viola yedoensis and Chinese goldthread and through stoving and crushing. The solid lichen-forming bacillus material contains lichen-forming bacillus in 10<9> CFU / g. The prawn feed additive is added into prawn feed in the added amount of 0.15-0.50 wt% before the feed is pelletized into 1.5 mm size grains. By means of the synergistic effects of the Chinese medicine materials and the lichen-forming bacillus, the prawn feed additive has the functions of raising the activity of digestive enzyme, promoting the growth of prawn and raising the survival rate of prawn.

The invention discloses a preparation method for rooting of a test-tube plantlet of an ample flow pear. The preparation method comprises the following steps of A, carrying out sterile test-tube plantlet cultivation on annual branches and stems of the ample flow pear, namely cutting the sterile test-tube plantlet into branches and stems with axillary buds for disinfection treatment, and cutting a root into an inclined surface to be inserted into an axillary bud medium for cyclic cultivation through day and night illumination; B, carrying out subculture proliferation on the sterile test-tube plantlet, namely cutting axillary bud seedlings which are sterile and robustly grow from the branches and the stems to be inoculated into a subculture medium for cyclic cultivation through the day and night illumination; C, transferring the test-tube plantlet of the ample flow pear into a rooting medium to induce the rooting, namely inoculating the test-tube plantlet of the ample flow pear to a first rooting medium for dark cultivation and then transferring to a second rooting medium for light cultivation to obtain a rooted plant, and carrying out cyclic cultivation through the day and night illumination; D, carrying out transplanting and domestication on the rooted seedlings in an illumination incubator, transferring the survived seedlings into a pot for cultivation. The preparation method is easy to carry out and easy to operate and solves the problem that the test-tube plantlet of the ample flow pear is difficult to root in the process of tissue cultivation; the rooting rate is high, a root system is developed, and the survival rate of transplanting is high.

The invention discloses a method for treating papermaking wastewater based on a combined process including an integrated membrane technology and an advanced oxidation technology. The method comprises the steps of treating the papermaking wastewater through a previous period anoxic / aerobic biochemical process, then putting the wastewater into a submerged ultrafiltration unit and a nano-filtration treatment unit in sequence, and treating nano-filtration concentrated discharged water through a Fenton advanced oxidation technology to realize up-to-standard release. The method disclosed by the invention is a novel treatment technology of papermaking wastewater, the papermaking wastewater is formed by mixing pulping production wastewater, papermaking production wastewater and other wastewater on production as well as domestic sewage and abnormal rainwater, the CODcr (chemical oxygen demand) and pH value are adjusted, most of suspended objects and colloidal substances are removed through a rotary-drum filtration process and flocculating sedimentation, then the papermaking wastewater is subjected to anoxic / aerobic biochemical treatment and then enters the submerged ultrafiltration treatment unit, penetrating fluid enters a nano-filtration treatment system, the penetrating fluid subjected to nano-filtration can meet requirements for papermaking production water through detection, and the nano-filtration concentrated discharged water is treated in a Fenton advanced oxidation treatment unit to realize up-to-standard release. The method is particularly suitable for treating papermaking wastewater which is very difficult to recycle through a conventional sewage treatment method.

The invention discloses a method of nursing and propagating ricefield predatory enemy insects. In rice transplanting stage, nectariferous plants, such as okra and wild chrysanthemum, are grown in peripheral ridges of a ricefield, and meanwhile the rice field is plowed; okra is planted i holes at intervals of 1.8-2.4 m; wild chrysanthemum is intercropped between every two holes of the okra; planting furrows of the wild chrysanthemum are 0.6-0.8 m in spacing; a combination farmland eco-system with co-existing rice and nectariferous plants is established. Water and fertilizer management for fields is carried out for rice production according to normal agricultural operations of the local site. Two years of actual field test applications prove that the quantity of enemy insects, such as spiders, ladybirds and predatory true bugs, in the ricefield eco-system is increased evidently, which is important to the ecological regulation for rice pests; the bio-control effect of enemies against pests can be exerted effectively; the usage of pesticides is reduced; sustainable development of agricultural health is promoted; the method has significant economic, social and ecological benefits.

The invention relates to a wet expanded granular formula feed for soft-shelled turtles. The feed is prepared from the following raw materials in part by weight: 20 to 30 parts of whitefish meal, 20 to 30 parts of Engraulis japonicas meal, 15 to 25 parts of flour, 2 to 5 parts of beer yeast, 8 to 15 parts of bean pulp, 1 to 2 parts of monocalcium phosphate, 1 to 1.5 parts of complex vitamin for soft-shelled turtles, 0.5 to 1 part of polymineral for soft-shelled turtles, 0.2 to 0.4 part of antioxidant and 0.1 to 0.2 part of preservative. Compared with the prior art, the feed has the advantages that: the feed has a scientific formula and balanced nutrients, and is high in digestion and absorption rate, soft in granules, high in stability in water, high in palatability and convenient to use. Before the feed is fed, manual water addition and oil addition are not required, time and labor are saved, and harmful bacteria can be effectively reduced when the feed is processed.

The invention discloses a tap water production monitoring and water supply scheduling management system, comprising a production monitoring terminal, a monitoring server, a network system and a systemclient, wherein the production monitoring terminal comprises a water taking monitoring and control system, a tap water production monitoring and control system, a pressurized pumping station monitoring and control system, a water supply pipe network monitoring system, and a cell secondary water supply equipment monitoring and control system; the network system comprises industrial communication protocol conversion equipment, firewall equipment and a ZigBee wireless networking system; the monitoring server is connected with the production monitoring terminal through a wired or wireless connection; the system client is connected with the monitoring server through a wired or wireless connection. According to the monitoring and scheduling system, supervision for tap water taking, production and conveying links is realized, economic benefits and social benefits of water supply enterprises are effectively improved, and sustainable healthy development of water supply enterprises is promotedthrough perfect equipment connections, rich software interfaces and a convenient browsing mode.

The invention relates to an immune-enhancing feed and a preparation method thereof. The immune-enhancing feed consists of gulfweed, sargassum thunbergii, cured kelp powder, cured shrimp meal, scallop meal, kaido crab apple powder, extruded soybean peptide, kaido crab apple shell powder, a nutritive element mixture and an immune-enhancing additive. The preparation method comprises the following steps: firstly, preparing the immune-enhancing additive; secondly, preparing the nutritive element mixture; and finally, adding the immune-enhancing additive and the nutritive element mixture into the gulfweed, the sargassum thunbergii, the cured kelp powder, the cured shrimp meal, the scallop meal, the kaido crab apple powder, the extruded soybean peptide and the kaido crab apple shell powder, and mixing to prepare a product. According to the immune-enhancing feed and the preparation method thereof, the preparation method is simple and is easy to operate, and the immune-enhancing feed can enhance the immunity of a stichopus japonicus organism and improve the resistance against the diseases of stichopus japonicus.

The invention provides a novel green feed additive for pigs, and belongs to the field of feed additives. The feed additive is prepared from, by weight, 3-8 parts of compound plant polysaccharide, 6-10 parts of a microecological preparation, 3-6 parts of mulberry leaf powder, 2-6 parts of ginger powder, 1-3 parts of common cephalanoplos herb powder, 4-8 parts of houttuynia cordata powder, 1-3 parts of shrimp shell meal and the balance carriers, wherein the carriers are composed of peanut shell powder and zeolite powder according to the mass ratio of 4-8 to 1. The additive is composed of green and safe substances; when the feed additive is applied in feed for live pigs, the feed additive can raise the immune level of the live pigs, decrease the morbidity of the live pigs, promote the healthy growth of the pigs and reduce the breeding risk and can further effectively improve digestion and absorption of the live pigs to the feed, increase the use ratio of the feed, reduce the breeding cost and increase the breeding benefit, and the application prospect is very wide.

The invention relates to feed additives in aquiculture, in particular to a quality improver for low-salt or freshwater aquiculture of Litopenaeus vannamei Boone and a preparation method thereof. one kilogram of the improver comprises the following components: 30-50g of freeze-dried green algae powder, 20-50g of krill powder, 200-300g of eucommia ulmoides powder, 10-20g of inosinic acid, 10-20g ofsodium glutamate and the balance of zeolite powder. By adoption of the quality improver, the content of bromophenol which is a seafood flavor substance in muscle of low-salt or freshwater cultivated Litopenaeus vannamei Boone can be effectively increased, the content of inosinic acid which is a main seafood flavor substance in muscle of Litopenaeus vannamei Boone can be effectively enhanced, the body color of Litopenaeus vannamei Boone can be effectively improved, the contents of protein and flavoring amino acid in muscle of Litopenaeus vannamei Boone can be effectively increased, the attraction effect of feed of Litopenaeus vannamei Boone can be promoted and the growth property of Litopenaeus vannamei Boone can be improved to a certain extent, and the taste and flavor of Litopenaeus vannamei Boone can be improved finally.

The invention relates to the field of biotechnology and particularly relates to a method for reducing the content of cyanides in cassava residues. The method is characterized by comprising the following steps: mixing saccharomycetes and actinomucor elegans according to a volume ratio of (1-5):(1-3) to obtain a mixed bacterial solution, then mixing 10-20ml of the mixed bacterial solution and 180-250g of cassava residues, and carrying out fermentation at 25-31 DEG C for 48-96h. The method is simple and easy. By adopting a micro-biological degradation mode, the content of hydrocyanic acid can be greatly reduced, the cyanide degradation rate is more than 80%, the safety of the cassava residues serving as feed is improved, and the hydrocyanic acid can be decomposed and converted to non-toxic organic matters to serve as nutrients of the feed, thereby increasing the economic benefits of safe utilization of the cassava residues.

The invention discloses a frozen fresh pomfret freshness rapid grading method based on deep learning, which belongs to the technical field of refrigerated food quality evaluation. Specifically, freshness grading is carried out on a pomfret image based on a Mask R-CNN technology, a frozen fresh pomfret image is obtained, a digital image data set is established, feature learning is fused into the process of establishing the model, accurate detection and segmentation are carried out on fisheye and gill parts, feature learning can be carried out autonomously, and the freshness of the pomfret can be accurately segmented and classified. Therefore, quick detection and intelligent prediction of the quality deterioration of the frozen fresh pomfret are realized; and the expandability and mobility of the model are improved. A rapid, low-cost, accurate, nondestructive and real-time automatic detection technology is realized, and the health and benefits of consumers are guaranteed. Product qualityis controlled for different varieties of cold chain storage and transportation environments and supply chain sources, and technical support is provided for public health and epidemic prevention.