129 results about "Selenious Acid" patented technology

By using the soluble salt of transition metalz Zn, Cd, Pb, Mn, Co, Ni, Cu, Ag, Sb and Bi, selenious acid or its solutl salt, or antimonous acid or its soluble salt as raw material, and hydrazine hydrate, sodium borohydride, potassium borohydride, hydroxylamine or hydrazine sulfate as reductant, and through hydrothermal reduction reaction at 100-200 deg.c in a sealed container for 2 hr to 5 days, selenides or tellurides of the said metals as semiconductor material may be synthesized. Unlike available synthesis process, which needs high temperature, toxic feedstock and complex technological course, the present invention has the advantages of low-cost material, simple apparatus, easy control, good technological reproducibility, stable product quality, etc.

The invention relates to a fertilizer formula and an application method of the fertilizer. The selenium-iron-zinc-enriched organic-inorganic fertilizer for producing selenium-iron-zinc-enriched rice is prepared by granulating proportionally mixed selenite, ferrite, zinc salt, nitrogen fertilizer, phosphate fertilizer, potash fertilizer, polyaspartic acid or other salts, decomposed organic fertilizer and silicon fertilizer. The fertilizer is applied to the field as a base fertilizer or supplementary fertilizer 1-4 times. The fertilizer can simultaneously provide selenium, iron and zinc and other nutrient reinforcing substances required by growth of crops. The fertilizer is beneficial to growth of the crops, enhances the absorptivity and conversion rate of selenium, iron and zinc, and can produce selenium-iron-zinc-enriched rice satisfying the Food Standard.

The invention relates to a formula of a fertilizer, and a using method for the fertilizer. A selenium and ferrum-enriched organic inorganic fertilizer used for producing selenium and ferrum-enriched rice is prepared by mixing selenite, ferrite, a nitrogen fertilizer, a phosphate fertilizer, a potash fertilizer, a decomposed organic fertilizer and a silicon fertilizer in a ratio, and granulating. The selenium and ferrum-enriched organic inorganic fertilizer is prepared from the following components in part by weight: 0.004 to 0.010 part of selenite, 1 to 5 parts of ferrite, 15 to 33 parts of nitrogen fertilizer, 12 to 24 parts of phosphate fertilizer, 10 to 17 parts of potash fertilizer, 0.02 to 0.08 part of sodium of polyaspartic acid or salt thereof, 30 to 50 parts of decomposed organic fertilizer and 5 to 8 parts of silicon fertilizer. The fertilizer contains selenium and ferrum, also contains other nutritional fortification substances required by growth of crops, can simultaneously provide selenium, ferrum and nutritional fortification substances required by the growth for the crops, contributes to the growth of the crops, improves the absorption rate and conversion rate of the selenium and the ferrum, and achieves an effect of producing the selenium and ferrum-enriched rice reaching the selenium and ferrum-enriched rice standard by applying a small amount of selenium and ferrum.

The invention discloses a bacillus ES2-45 capable of reducing selenite to produce nano-selenium and application thereof. The collection number of the bacillus ES2-45 is CCTCC (China Center For Type Culture Collection) NO:M2014094. The strain has the capability of fastly reducing toxic selenite into low-toxicity nano-selenium, red nano-selenium can be produced within 4h when the strain is cultured in 1 / 10TSB culture medium containing 1mmol / LNa2SeO3, the 1mmol / LNa2SeO3 can be reduced completely in 48h, the yield of nano-selenium is high up to 239, 290+ / -20.11mg / kg. Therefore, after being added into an animal feed, the nano-selenium and thalli produced by fermentation of the bacillus in the selenite-containing culture medium are safe and low-toxicity, easy to absorb, and capable of improving the quality of animal meat. The bacillus is easily fermented and stored and the strain is capable of efficiently reducing selenite, so that the strain has good application prospects on the aspect of microorganism treatment of the selenium-polluted soil.

The invention discloses a method for biosynthesizing nano-selenium through bacillus licheniformis. The method comprises the steps of slope seed culture, first-level seed culture, second-level seed culture and fermentation production. The selected bacillus licheniformis can resist high-concentration selenite and can resist sodium selenite with the highest concentration of 2000 mg / L. The efficiency of converting the sodium selenite into red active nano-selenium reaches up to 80% or above. The bacillus licheniformis belongs to probiotics, is safe to use and can be directly used as a feed additive to be added into livestock and poultry feed, and selenium-enriched meat food can be produced for people by feeding livestock and poultry with the nano-selenium produced through the bacillus licheniform. According to the selected bacillus licheniformis, the requirements for culture media and culture conditions needed during culture are low, the culture cost is low, and the method for biosynthesizing the nano-selenium through the bacillus licheniformis has the advantages that operation is easy, preparation is convenient and the cost is low, and is applicable to industrial large-scale production.

The invention relates to a production method of selenium-iron-zinc-rich rice, in particular to a production method of preparing the selenium-iron-zinc-rich rice through applying selenium-iron-zinc-rich organic and inorganic special fertilizers. The production method of organic selenium-iron-zinc-rich nutrition enhanced rice sequentially comprises the following steps of: seed selection, seedling culturing, field cultivation, rice seedling transplanting, field management, harvesting and processing, wherein the field management comprises fertilization, the applied fertilizers are the selenium-iron-zinc-rich organic and inorganic special fertilizers, the number of fertilization times is 1 to 4, and the selenium-iron-zinc-rich organic and inorganic special fertilizers comprise selenite, ferrite, zinc salts, nitrogenous fertilizers, phosphatic fertilizers, potash fertilizers, polyaspartic acid, polyaspartate, decomposed organic fertilizers and silicon fertilizers. Through the application of the selenium-iron-zinc-rich fertilizers, selenium, iron and zinc elements and other nutrition enhanced substances required by growth are simultaneously provided for crops, the application of the fertilizers is favorable for the crop growth, the absorption rate and the conversion rate of selenium, iron and zinc are improved, and the selenium-iron-zinc-rich rice conforming to the food standard is produced.

The invention provides a coumarin dyestuff linked by naphthene ketones, method for synthesis and use, wherein the method employs the conventional hydroxyaldehyde condensation reaction and consists of, charging naphthene ketone, corresponding aldehydes with A1 groups into reactor, obtaining semi-naphthene ketone dyestuff with A1 groups, subjecting corresponding third position methyl substituted or fourth position methyl substituted coumarin having A2 group and selenious acid in another catalyst case to obtain coumarin aldehyde having A2 group, subjecting the A1 group semi-naphthene ketone dyestuff and A2 group coumarin aldehydes to reaction at the presence of mixed solvent of dimethylbenzene and alcohol, thus obtaining coumarin type dyestuffs coupled by naphthene ketones.

The invention discloses a limbal stem cell serum-free medium, consisting of the following raw materials (calculated by weight percent): DMEM / F12 60ml-90ml, BSA 0.5g-4g, EGF 1Mug-4Mug, insulin 0.1mg-1mg, hydrogen 20ug-100ug, cholera toxin 1ug-10ug, transferrin 0.1mg-1mg, selenious acid 0.1ug-1ug, GCLCM 10ml-40ml, penicillin 5*103IU-2*104IU and streptomycin 5*103IU-2*104IU. The invention adopts the method that the culture medium is added with fibroblast conditioned medium, and the nutritive factors are supplemented with the hormone and cytokine combination, fibroblast conditioned medium and BSA. As a result, the nutritive needs for long-time in-vitro expansion and cultivation of the limbal stem cell serum-free medium are satisfied, and the medium is serum-free and suitable for commercial production.

The invention relates to a method for preparing seleno-polysaccharide by an organic method, which comprises the following steps: (1) placing potentilla anserine polysaccharide and artemisia seed polysaccharide into a reactor, adding N,N-dimethyl formamide into the reactor, and stirring to obtain suspension A; (2) dripping thionyl chloride into selenious acid for reacting, carrying out reduced pressure distillation on the reacted solution to obtain solid matter B; (3) dissolving the solid matter B with the N,N-dimethyl formamide, and adding the mixed solution into the suspension A for reaction to obtain reaction solution C; and (4) dissolving the reaction solution C with distilled water, adjusting the pH value to be 7 with sodium hydroxide, carrying out centrifugation, filling supernatant fluid into a bag filter with the interception quantity of 8,000 to 140,000Da, introducing tap water for dialysis, and carrying out the dialysis with deioned water; and carrying out reduced pressure distillation on the solution in the bag filter, adding ethanol into concentrated solution, standing the mixed solution at room temperature, carrying out centrifugation, collecting deposition on the lower layer and freezing and drying to finally obtain the potentilla anserine polysaccharide or the artemisia seed polysaccharide. The method has the advantages of short reaction time, few byproducts, simple reaction process, high selenium content of products and the like.

The invention belongs to the technical fields of selenium-containing fruit stem smears for fruits and vegetables, preparation processes and use methods thereof and discloses a selenium-containing fruit stem smear for f fruits and vegetables as well as a preparation process and a use method thereof. The selenium-containing smear is characterized by comprising the following materials by weight: 100kg of refined wool oil, 6.5-13 kg of refined food-grade compound amino acid powder, 0.06-0.6 kg of pure selenium contained in selenite or selenic acid and 10-13.5 kg of water. The materials are chelated and homogeneized, so that the selenium-containing fruit stem smear for fruits and vegetables can be attached to the fruit stems for a long term and can not be taken away by wind and rain; since theselenium element is directly absorbed by fruits without being consumed by other parts of plants, absorption rate is improved so that the fruits and vegetables which have stems contain high selenium contents; and the preparation method and use method are convenient for operation and are beneficial to popularization.

The invention discloses a potassium-containing selenium fertilizer for promoting plant growth and deteriorating pesticide residue. The potassium-containing selenium fertilizer adopts the technical scheme that selenious acid is generated firstly and then neutralized by potassium hydroxide so as to obtain potassium selenite. According to the deterioration requirement of different crops and different pesticides, the potassium selenite is prepared into the selenium fertilizer of 'potassium selenite kind' with the pH value of 7.2 to 8.5, and the concentration of 100 ppm to 500 ppm. The potassium-containing selenium fertilizer substitutes sodium selenite (sodium is a redundant element in the fertilizer) to serve as the selenium fertilizer which is sprayed on the leaves of the plant, so that the dual manurial effect of the selenium fertilizer and a common potash fertilizer can be achieved. After the leaves of the plant are sprayed with the fertilizer, the plant can be harvested at different time intervals, so that the effects of increasing the yield and deteriorating pesticide residue can be achieved.

The invention relates to a process for synthesizing 3- or 4- carbonyl substituted coumarin connected by naphthenones and its use. The preparation process using general aldol condensation reaction comprises cyclanone and its corresponding aldehyde compounds with A1 group are added in reactor to produce semi-cyclanone with A1 group; 3- or 4- acetyl substituted coumarin with A2 group and selenious acid are added in another reactor to produce coumarin aldehyde with A2 group; said semi-cyclanone with A1 group dye reacts with coumarin aldehyde with A2 group in the presence of xylene and ethanol mixed solvent to form 3- or 4- carbonyl substituted coumarin connected by naphthenones. The product can be used for visible light polymerization of olefine monomer in photosensitized initiation system and used as photo curing materials, etc.

The invention discloses a method for preparing nanometer monomer selenium via coupling liquid amino acid, comprising that at normal temperature and normal pressure, adding vitamin C solution into amino acid solution, mixing uniformly and adding selenious anhydride or selenite solution until the product has held red, to obtain the liquid coupled product of amino acid and nanometer selenium. The nanometer monomer selenium can be used as medical health-care product to display the cooperation between amino acid and nanometer selenium, while the nanometer selenium gel has small diameter, narrow distribution and liquid storage, to develop oral, injection or the like.

The invention provides rich-in-selenium liquid bacterial manure, a preparation method and application, and belongs to the technical field of agricultural biology. The raw materials of the rich-in-selenium liquid bacterial manure comprise biogas slurry, mushroom slag, EM bacteria solution, EM raw bacteria solution, CM bacteria, selenite and brown sugar. The rich-selenium liquid bacterial manure can provide various nutrition elements for vegetables for promoting the growth. The preparation method of the rich-in-selenium liquid bacterial manure comprises the following steps of adding partial EM bacteria solution, mushroom slag and partial CM bacteria solution into the biogas slurry; regulating the pH value; performing primary fermentation to obtain first fermentation solution; mixing the rest EM bacteria solution and the partial selenite solution with the first fermentation liquid; after 4 to 6 days, adding partial EM raw bacteria solution, the rest CM bacteria solution and the rest selenite solution; performing secondary fermentation to obtain the rich-in-selenium liquid bacterial manure. The preparation method has the advantages that the technology is simple; the selenium liquid bacterial manure with the excellent performance can be effectively prepared. The preparation method of the rich-in-selenium liquid bacterial manure can be applied to leaf fertilizers or root irrigation fertilizers.

The invention relates to a production method for selenium-rich iron-rich rice, in particular to a production method for preparing the selenium-rich iron-rich rice by applying selenium-rich iron-rich organic inorganic special fertilizer. The production method for the organic selenium-rich iron-rich nutrition enriched rice sequentially comprises the following steps of: selecting seeds; raising rice seedlings; plowing the field; transplanting the rice seedlings; performing field management; harvesting; and processing, wherein the field management comprises fertilization; the applied fertilizer is selenium-rich iron-rich organic inorganic fertilizer; the fertilizing times are 1 to 4; and the selenium-rich iron-rich organic inorganic fertilizer comprises selenite, ferrous salt, nitrogen fertilizer, phosphate fertilizer, potassium fertilizer, polyaspartic acid or salt thereof, composted organic fertilizer and silicon fertilizer. By the production method, the conventional general method for producing the selenium-rich iron-rich rice mainly by spraying a selenium / iron-containing solution or selenium / iron-containing foliar fertilizer in flowering stage and the seed mature stage of the rice or adding the selenium / iron-containing solution in the rice processing process is changed and unsafe factors in preparation of the selenium / iron-rich rice are avoided. The production method is economic, efficient and pollution-free.

The invention provides a soil oxidization-solidification and stabilization remediation agent and an application method of the soil oxidization-solidification and stabilization remediation agent. The soil oxidization-solidification and stabilization remediation agent comprises zero-valent iron, silicate and calcium oxide, wherein zero-valent iron, silicate and calcium oxide are independently packaged. By means of the process of activation of molecular oxygen in zero-valent and a disilicate system, oxidizing removal of organic matter in contaminated soil is achieved, and the interference of the organic matter to the soil solidification and stabilization process is reduced. Meanwhile, the mobility of reducing substances possibly existing in heavy metal contaminated soil, such as arsenious acid groups, selenious acid groups and sulfur ions is greatly reduced through oxidization. Then calcium oxide / calcium hydroxide is added, and stabilization and immobilization of heavy metal ions such as copper, lead, cadmium and mercury are achieved through iron minerals formed by residual zero-valent iron and calcium silicate compounds. The soil oxidization-solidification and stabilization remediation agent can conduct oxidization-solidification and stabilization on the heavy metal contaminated soil or organic matter and heavy metal combined contaminated soil with different contamination degrees, and products formed after solidification and stabilization can be used for backfilling or other purposes.

The invention provides a selenylation honeylocust kernel polysaccharide gum and a preparation method thereof. The preparation method comprises the following steps of: (1) adding honeylocust kernel polysaccharide gum into HNO3 solution, and dispersing; and (2) adding BaCl2 and sodium selenite for reaction, dripping Na2SO4, settling, collecting supernate, dialyzing the supernate by using water, collecting clear liquid, adding 90 to 95 percent ethanol into the clear liquid in a volume ratio of 1:2-6, settling, and collecting the sediment, namely the selenylation honeylocust kernel polysaccharide gum. The selenylation honeylocust kernel polysaccharide gum is formed by introducing selenium into a saccharide unit of the honeylocust kernel polysaccharide gum, the toxicity of selenious acid groups can be effectively reduced, selenylation honeylocust kernel polysaccharide easily dissolved in water is obtained, and the selenylation honeylocust kernel polysaccharide gum has clearing effect on free hydroxyl radicals. The selenylation honeylocust kernel polysaccharide gum has the following molecular formula.

The invention discloses a method for improving selenium fertilizer absorption efficiency of tea trees. The method is characterized by applying selenium transformation accelerators which accelerate transformation from selenium to selenites and selenium absorption accelerators which can change the rhizosphere microenvironments of the tea trees, prevent the existing plant available selenium in the soil from being transformed to other forms and promote selenium absorption of the roots of the tea trees to the soil while applying selenium nutrients. By adopting the method, on one hand, the absorbability is enhanced by enlarging the contact area of the root system and the selenium nutrients, and on the other hand, the selenium forms in the selenium nutrients are transformed to the chemical forms beneficial to absorption of the tea tree root system and absorption is promoted, thus improving the utilization rates of the selenium nutrients by over 50%.

The invention discloses a compound selenium fertilizer for degrading residual pesticide and heavy metals and stimulating plant growth. The mixed inorganic compound selenium fertilizer is used for spraying leaves. The mixed inorganic compound selenium fertilizer is prepared by the following steps: firstly generating selenious acid; then, obtaining selenite; mixing potassium selenite and sodium selenite salt according to a certain proportion; and adding micro calcium ions to obtain the mixed inorganic compound selenium fertilizer which can resist alkali, is prepared according to the needs of different crop types and different pesticides, has a pH value of 7.0-7.8 and the density of 100-500 ppm, degrades the residual pesticide and stimulates the plant growth. The mixed inorganic compound selenium fertilizer is sprayed on plant leaves and collected at different time intervals to achieve the effects of increasing the yield and degrading the pesticide residue and the heavy metals.

The invention discloses a method for increasing the absorption and utilization ratio of selenium-containing fertilizer under a dry farming condition. On the basis that the selenium-containing fertilizer is applied to soil, a selenium transformation accelerator and a selenium absorption accelerator are further applied to the soil. On the one hand, the transformation of a selenium-containing compound to selenate or selenite is promoted; and on the other hand, excessive H ions released by crop roots and used for being exchanged for cations are absorbed and combined to promote the absorption of selenium, so that the utilization ratio of a selenium nutritional agent can be increased by above 50 percent, the cost can be saved and the selenium are effectively enriched.

The invention discloses selenium-enriched fermented soybean meal, a preparation method and application. The preparation method comprises the following steps: breeding of a selenium-enriched strain, preparation of seed culture liquid, fermental cultivation, monoclonal fermentation of probiotics, preparation of composite bacteria liquid of the probiotics, adding of a fresh culture medium and preparation of high-activity selenium-enriched soybean meal. According to the preparation method, selenium-enriched yeast and the probiotics are jointly used for fermenting soybean meal, thus obtaining the fermented soybean meal with high organic selenium content and rich amino acids. On one hand, pollution and harm to the environment and an animal body, which are possibly caused by direct adding of a selenite substance into a feed, are avoided; on the other hand, the content of selenium in the soybean meal can be greatly increased; and the selenium-enriched fermented soybean meal is rich in biological organic selenium and also contains a large quantity of beneficial microorganisms and fermentation metabolites, so that the nutrition is richer, the quality of the soybean meal is obviously improved, the ability of an animal for digesting and absorbing nutritional substances can be promoted, the immune function of an organ is enhanced, multifunctional soybean meal with high selenium content is prepared, and the nutritional value and the effect of the soybean meal are increased.

The invention discloses a controlled-release zinc magnesium selenium phytate fertilizer and a preparation method thereof. The fertilizer is prepared by the method which comprises the following steps: firstly, dissolving a phytic acid and a selenious acid in water to prepare aqueous solution and heating the aqueous solution; secondly, orderly adding zinc oxide and magnesium oxide into the prepared aqueous solution with stirring to perform reaction at the temperature of 40 to 85 DEG C for 2 to 5 hours; thirdly, mixing and uniformly stirring magnesium potassium chloride and calcium superphosphate to obtain a mixture, adding the product prepared in the former step into the mixture and uniformly stirring the mixture; and finally, granulating, drying and coating the obtained product to obtain finished products. The fertilizer can be simultaneously applied together with a basal fertilizer, meets the multiple-absorption requirements of crops, decreases labor intensity, and fulfills the aim of maximally storing the trace elements in fruits of the crops and meets the requirements of human bodies or animal bodies on the intake of trace elements because the trace elements in the fertilizer can be released after the fertilizer is applied for a certain time.

The invention discloses a meat goat pelleted concentrate, and relates to a goat forage, which comprises the following components of: corn, guniting protein, wheat shorts, guniting wheat bran, soybean meal, cottonseed meal, corn germ cake, corn DDGS, castor meal, cottonseed protein, calcium hydrogen phosphate, fine stone flour, salt, sodium bicarbonate, magnesium oxide, ferrous sulfate monohydrate, copper sulfate pentahydrate, manganese sulfate monohydrate, zinc sulfate monohydrate, selenious acid at the concentration of 1%, cow multivitamin, a sweetener, and calcium iodate at the concentration of 1%. The meat goat pelleted concentrate belongs to a forage with high energy, high protein and high amino acid, has abundant nutrients as well as good palatability, grows by rumen microorganisms, and can be used to promote digestion and raise the utilization rate of the forage; when in use, the meat goat pelleted concentrate is mixed with various local crop straw, wicker, and leaves to feed goats; the ratio of the forage used to meat reaches 4.5-5: 1 and goats grow rapidly. Therefore, the cost is reduced and the benefits of raising households are raised.

The invention discloses a method for preparing selenium-coated basic cupric chloride and an application thereof. The method comprises the following steps: a. crystalline phase basic cupric chloride, water and a stabilizer are added to a reactor and added with sodium hydroxide solution while stirring; discharge, washing and negative pressure suction filtration are carried out after reaction to obtain hydroxyl-modified crystalline phase basic cupric chloride; b. the hydroxyl-modified crystalline phase basic cupric chloride and water are added to the reactor, and added with selenious acid while stirring, after reaction, added with chalcanthite for reaction, discharged, washed and negative pressure suction filtration are carried out to obtain the selenium-coated basic cupric chloride containing the crystalline phase basic cupric chloride, basic cupric selenite and basic cupric sulfate. The selenium-coated basic cupric chloride prepared by the method can be taken as a trace mineral supplement of animal feeds and has the advantages of no absorption of moisture and no agglomeration, good fluidity, stable chemical properties, good cooperation with the feeds, low price, low addition cost, soluble subacidity, easy absorption and application, etc.

The invention discloses a method for the Radix Platycodonis polysaccharide regulated preparation of a nutritional liquid fertilizer containing nano-selenium. The method comprises the following steps: preparing a nano-selenium solution from Radix Platycodonis polysaccharides and seleninic acid by using an ascorbic acid reduction technology; preparing a soybean meal composite amino acid stock solution from soybean meal by using a sulfuric acid hydrolysis technology, adsorbing and decolorizing the stock solution by active carbon modified through 0.25% KOH solution treatment, filtering the stock solution, sterilizing the obtained filtrate by cobalt60 to prepare a soybean meal composite amino acid solution; and uniformly mixing magnesium sulfate, zinc sulfate, manganese sulfate, ferrous sulfate, borax, copper sulfate, sodium molybdate, silica, Arabic gum and water with the nano-selenium solution and the soybean meal composite amino acid solution to prepare the nutritional liquid fertilizer containing nano-selenium. The soybean seed composite amino acid solution and trace elements are compounded to make the trace elements exist in a chelated state, so the utilization rate of the trace elements is increased, the absorption of the plants to macro-elements is promoted, the crop yield is increased, and the crop quality is improved.

The present invention relates to the field of environmental protection, and in particular to a leaf surface barrier for ac- curately controlling cadmium absorption and transport related gene expression in rice, and an application thereof. The present inven- tion comprises: reducing a raw material, i.e., selenious acid or selenite, by using ascorbic acid to generate a nanogel, and then emul- sifying the managed for peptization to obtain a leaf surface barrier for accurately controlling cadmium absorption and transport re- lated gene expression in rice; and then mixing the leaf surface barrier with a silica sol to obtain a composite selenium and silica sol leaf surface barrier. The present invention also provides a leaf surface barricading method for accurately controlling cadmium ab- sorption and transport related gene expression in rice. By applying the leaf surface barrier, the silica sol or the composite selenium and silica sol leaf surface barrier having a particular atomization degree and a particular contration by means of foliar spray dur- ing a particular growth period of rice and within a particular time, the cadmium accumulation in rice can be effectively reduced. Ap- plying the present invention to a moderately or lightly polluted field can enable cadmium content in rice to satisfy the food hygiene standards, and therefore is significant for achieving the safe use of the large area of field polluted by heavy metal cadmium in China.

The invention discloses a method for synthesizing selenized fenugreek polysaccharides. The method comprises the following steps: preparing a fenugreek polysaccharide formamide solution; preparing an ionic liquid; activating selenous acid by using the ionic liquid; and synthesizing the selenized fenugreek polysaccharides. The ionic liquid is utilized to activate the selenous acid to prepare the high-activity selenization reagent, and the bioactive selenized fenugreek polysaccharides are efficiently synthesized under mild conditions. The selenium content is up to 27554-29773 mu g / g. The reagent is friendly to the environment and simple to prepare, does not need any toxic seleniferous intermediate, and does not have the waste liquid discharge, thereby effectively shortening the reaction required lime, and widening the application range of the fenugreek polysaccharides as natural active substances. The activity test indicates that the synthesized selenized fenugreek polysaccharides have obvious in-vitro inhibiting actions on HepG2 liver cancer cells.

The invention relates to a selenium strontium feed additive, which comprises the following ingredients in parts by weight: 10 to 20 parts of selenate or selenite, 15 to 25 parts of zinc sulfate, 15 to 25 parts of strontium chloride, 10 to 20 parts of calcium chloride, 10 to 20 parts of sodium chloride and 3 to 5 parts of compound sodium nitrophenolate. A production process of the selenium strontium feed additive comprises the steps of material preparation, proportioning, stirring, crushing, inspection and package. The production process is carried out under the dry and sealed conditions, and the air humidity is required to be lower than 75 percent. A use method comprises the following steps that the selenium strontium feed additive and the feed are mixed and stirred according to a weight ratio of 1:(5000-20000) according to the concentration of the selenium strontium feed required by livestock and poultry eggs; for the livestock, the feed mixed according to the weight ratio only needs to be continuously fed to the livestock and the poultry in 20 to 30 days before the killing; and for poultry eggs, only the poultry in the egg laying peak period need to be selected to be continuously fed with the feed mixed according to the weight ratio for 7 to 10 days, and eggs containing selenium and strontium can be produced.

The present invention features that the healthy milk cow beginning to milk is fed first with then with common feed adding concentrated feed I in the amount of 0.5 kg / day for 7-10 days, then with common feed adding concentrated feed II in the amount of 0.5 kg / day for 7-10 days and with common feed adding concentrated feed III in the amount of 0.5 kg / day in the rest milking period. Thus, selenium-rich milk is produced. The concentrated feed I consists of bean cake, wheat bran, table salt, potassium chloride, corn powder and zinc protein powder; and the concentrated feed II and the concentrated feed III have selenious acid or sodium selenite added on the basis of material composition of concentrated feed I.

The invention discloses a binding agent for a selenium-rich organic-inorganic compound fertilizer, which comprises the following raw materials in parts by weight: 30-40 parts of round-grained rice starch, 4-6 parts of selenium-enriched yeast, 4-6 parts of maltose, 50-60 parts of water, 0.001-0.004 part of sodium selenite, 2-3 parts of potassium hydroxide, 0.2-0.4 part of borax and 0.1-0.2 part of tributyl phosphate; the components of the raw materials satisfy the composition of the optimum culture medium of yeast culture; the proportion satisfies the optimum food proportion of fermentation; the optimum selenium-rich benefit combination is selected for fermentation temperature and fermentation time; and the adding proportion and frequency of the inorganic selenium satisfy the maximum tolerance of yeast to selenious acid. The potassium chloride is selected as the fermentation termination agent, thereby not only achieving the effects of salt tolerance and fermentation inhibition, but also ensuring the controllability of the composition of the binding agent; and as the organic selenium is applied to the plants, the long-lasting property of the selenium fertilizer is ensured, more importantly the environmental risk of the selenium fertilizer is reduced, meanwhile, the plant absorbs selenium for synthesis with plant tissues to satisfy the synchronization, therefore, the defects of passive plant absorption, growth inhibition, reduced quality of agricultural products, low activity of the selenium source and the like caused by the foliar application and the fertilizer application to the root of organic selenium are overcome.