281 results about "DL-methionine" patented technology

The invention belongs to the field of feeds, and particularly relates to a six percent-premix for lactating sows and a wheat-type daily ration prepared from the six percent-premix. The premix comprises multivitamins, composite trace elements, DL-methionine, lysine, threonine, L-arginine, valine, composite electrolyte, compound enzyme, 5000 IU of phytase, functional additives, feed attractants, calcium hydrogen phosphate, stone powder, salt, choline, antioxidants and defatted rice bran. On the whole, the daily ration for the lactating sows is capable of protecting the development of mammary glands of the sows, ensuring plentiful milk with high quality in the lactation period of the sows and increasing the survival rate of suckling piglets, and enables the piglets to have higher weaning weight.

The invention belongs to the animal sitology technical field, in particular to big pig premix and an application method thereof. The premix mainly comprises the following components: iron element, copper element, zinc element, manganese element, iodine element, cobalt element, selenium element, composite vitamine premix, DL-methionine, lysine, threonine, cholinehydrochloride, calcium hydrophosphate, rock flour, salt, carrier and phytase. The big pig premix and conventional basic ration are used to prepare big pig compound feed to feed big pigs with conventional process, and the content of the big pig premix in the big pig compound feed is 4% according to the weight percentage. The big pig premix provided by the invention is simple and safe to use; after feeding big pigs, the fodder-meat rate can be reduced, the big pig growth speed and lean meat percentage are increased and the meat quality safety can be improved.

The invention provides a nano nutrient microemulsion and a preparation method thereof. The nano nutrient microemulsion comprises active components, auxiliary materials and a solvent, wherein the active components comprise vitamins and amino acid, and the auxiliary materials comprise an emulsifier and an assistant emulsifier. According to parts by weight, the active components particularly comprise 5-50 parts of vitamin A, 1-10 parts of vitamin D3, 1-10 parts of vitamin E, 1-5 parts of vitamin B1, 1-5 parts of vitamin B 6, 0.01-0.5 part of vitamin B12, 1-10 parts of vitamin C, 1-10 parts of vitamin K, 1-10 parts of D-calcium pantothenate, 0.5-5.0 parts of L-lysine, 0.5-5.0 parts of DL-methionine and 0.5-5.0 parts of L-arginine. The invention further provides the preparation method for the nano nutrient microemulsion, which prepares the oil-in-water microemulsion by uniformly mixing an oil phase with an aqueous phase. With stable thermodynamic property, high bioavailability, simple preparation method and easy operation, the nano nutrient microemulsion can be widely used in such industries as feed, cosmetics, medicine, beverages, health care products and the like.

The invention provides flavor soup-stock seasoning which comprises the following raw materials: pork, pig bone clear soup, lard, chicken, chicken bone clear soup, chicken oil, water, L-cysteine hydrochloride monohydrate, DL-methionine, VC, glucose, a yeast extract, table salt, aginomoto, soybean peptides, gingers, onions, modified starch, edible essence, compound protease, flavourzyme, light soy sauce, hydrolyzed vegetable protein powder, CMC, white sugar, I+G and potassium sorbate. The meat raw materials and the soup are subjected to Maillard reaction step by step to obtain the flavor soup-stock seasoning. According to the soup-stock seasoning, the optimum formula of the flavor soup-stock seasoning is determined; the soup-stock flavor is enhanced through pork enzymolysis, chicken enzymolysis and Maillard thermal reaction; through combination of the soybean peptides, the pig bone clear soup and the chicken bone clear soup and with the aid of spice and the edible essence, the prepared seasoning looks like milk-white thick paste, has a strong bone soup flavor and tastes delicious and mellow; a dish can be delicious with a little seasoning; and the seasoning is convenient to use.

The invention provides a non-antibiotics compound feed for a suckling pig. The non-antibiotics compound feed comprises the following components in parts by weight: 430 to 450 parts of extruded corn, 80 to 90 parts of fermented soybean meal, 150 to 160 parts of expanded soybean meal, 150 to 180 parts of milk powder with high protein, 20 to 30 parts of plasma protein, 1 to 3 parts of yeast nucleotide, 40 to 50 parts of super steamed fish meal, 12 to 15 parts of monocalcium phosphate, 1.5 to 1.75 part of 50% choline, 25 to 30 parts of saccharose, 3 to 5 parts of composite acidifier, 5 to 8 parts of stone powder, 3 to 5 parts of 98.5% L-lysine, 2 to 3 parts of table salt, 1 to 1.5 part of threonine, 0.2 to 0.3 part of 98.5% DL-methionine, 0.5 part of multifunctional complex enzyme preparation, 0.4 part of decavitamin for pig, 0.25 part of antioxidant, 0.2 to 0.3 part of combined microecologics, 1 to 1.5 part of nanometer montmorillonite, 1 part of plant extract, and 2 parts of compound trace element.

The invention discloses meaty paste essence and a preparation method thereof. The meaty paste essence comprises the following components in part by weight: 10 to 30 parts of L-cysteine, 15 to 20 parts of vitamin B, 20 to 40 parts of glucose, 10 to 20 parts of L-leucine, 5 to 10 parts of DL-methionine, 2 to 8 parts of alanine, 50 to 150 parts of yeast fine paste, 200 to 300 parts of bean pulp zymolyte, 2 to 5 parts of disodium inosinate and disodium guanylate (I+G), 30 to 60 parts of soy sauce, 50 to 80 parts of animal fat, 50 to 80 parts of salt, 50 to 100 parts of white granulated sugar, 1 to 3 parts of xanthan gum, 50 to 100 parts of sodium glutamate, 30 to 60 parts of corn starch and 10 to 30 parts of meaty flavoring base. The meaty paste essence prepared by combining the Maillard reaction technology and the bean pulp proteolysis technology has good mouthfeel, high environment-friendly indexes, stable quality, low cost and high safety performance.

The invention discloses a low-protein weanling piglet feed which comprises the following raw materials: corns, bean pulp, calcium hydrogen phosphate, dried porcine soluble, fermented bean pulp, fish meal, soybean oil, a premix, sodium chloride, phytase, a compound antioxidant, a compound acidifier, a compound enzyme preparation, a microecological preparation, limestone, L-lysine hydrochloride, L-threonine, DL-methionine, L-tryptophan and a compound traditional Chinese medicine preparation. According to the feed, the crude protein content of piglet full-price daily ration is reduced to 16% from 19%; the compound acidifier, the compound enzyme preparation, the microecological preparation and the compound traditional Chinese medicine preparation are added, so that the immunity of piglets is comprehensively improved and the use of antibiotic drugs is reduced; low-protein high-growth piglet ration is prepared, so that the misunderstanding to the feed consumption caused by farmers is eliminated, the low-protein ration formula technology is really popularized in local, the use of protein raw materials and the diarrhea of the piglets are reduced, and the cost and the N discharge are reduced.

The invention relates to piglet creep feed, including the following components: 53 to 58 parts of expended maize, 8 to 12 parts of whey powder, 14 to 16 parts of fermented soybean meal, 1.8 to 2.2 parts of bean oil, 2.7 to 3.4 parts of glucose, 4.5 to 5.5 parts of fish meal, 4.5 to 5.5 parts of blood plasma protein powder, 2.3 to 2.7 parts of intestinal membrane albumen powder, 0.1 to 0.15 parts of DL-methionine, 0.35 to 0.4 parts of lysine salt, 0.1 to 0.15 parts of L-threonine, 0.25 to 0.35 parts of compound organic acid, 0.15 to 0.25 parts of choline chloride, 0.08 to 0.15 parts of calcium propionate, 0.06 to 0.10 parts of copper sulfate, 0.022 to 0.026 parts of ferrous sulphate, 0.02 to 0.04 parts of ferrous fumarate, 0.03 to 0.04 parts of zinc sulfate, 0.014 to 0.018 parts of manganese sulfate, 0.004 to 0.008 parts of calcium iodate, 0.004 to 0.005 parts of sodium selenite and 0.03 to 0.05 parts of piglet multi-vitamin; and the total amount is 100 percent. The invention takes the palatability and the high digestion rate of the feed into consideration, increases the energy level of the feed, pays attention to the balance of effective amino acid and microelements, enhances the capability of disease resistance of piglet, effectively eliminates the ablactation stress of the piglet, and enables the piglet not to lose weight after ablactation and to smoothly pass the ablactation period, thereby increasing the survival rate.

The invention relates to a preparation method of a scallop seasoning essence, which comprises the following steps of: crushing cleaned scallop aprons, and carrying out blanching denaturation; carrying out enzymolysis, enzyme destruction, concentration, drying and pulverization to obtain scallop apron hydrolysate; adding auxiliary materials comprising HVP(Hydrolyzed Vegetable Protein) powder, yeast extract, L-sulfo-aminolactic acid, xylose, glycine, aminopropionic acid, L-phenylalanine, DL-methionine, salts, purified water, vitamins, glucose, thiamine chloride VB1, I+G, maize starch, onion powder and ginger powder to the scallop apron hydrolysate, carrying out Maillard heat reaction for 40-60 min at 100-125 DEG C; and carrying out cooling, vacuum drying, pulverization, granulation and packaging to obtain the scallop seasoning essence as a finished product. The scallop seasoning essence has delicious and pure taste, pure and thick mouth feel and strong sweet smell, is endowed with the peculiar seafood flavor of scallop and has the characteristics of natural raw materials and various nutrient substances comprising amino acid, peptides and the like. The preparation method has the advantages of reasonable process, convenience for operation, strong operability and easiness of realizing industrial production.

The invention relates to child care pig compound feed without a tensile body, and the child care pig compound feed is prepared from the following components: corn, peeled soybean meal, puffed soybean meal, fermented soybean meal, steam white fish meal, flour, soybean oil, mountain flour, calcium hydrogen phosphate, edible salt, child car pig compound premix, coated slow-release acidifier, L-lysine hydrochloride, DL methionine, L-thronine, tryptophan, octanoic/decanoic acid glyceride, yeast nucleic acid, xylo-oligosaccharides, sodium glutamate, sodium butyrate, the root of Chinese pulsatilla, coptis chinensis, golden cypress, ash bark, choline chloride and phytase. The child care pig compound feed without the tensile body provided by the invention starts from the physiological characteristics of a child care pig, adopts multiple combinations of raw materials, is complementary in nutrition, designs amino-acid-balanced, calcium-phosphate-balanced and electrolyte-balanced daily ration, adds no antibiotic, adopts medium-chain fatty acid and natural Chinese herbal medicine additive for health protection, and can be used for improving food consumption of the child care pig, reducing the feed conversion ratio, improving intestinal health of the child care pig, improving immunity and drawing a skeleton of the child care pig, so that a good foundation is laid for later-stage growth.

The invention provides a Gongtai special mixed feed for late pregnancy of pregnant sows and a preparation method thereof. The feed of the invention comprises the following raw materials (by weight): 30-40 parts of corn, 20-25 parts of wheat bran, 10-20 parts of soybean meal, 0-10 parts of vinasse protein, 0-10 parts of rice bran meal, 0-2.5 parts of soybean oil, 0-1 part of white sugar, 1-1.3 parts of fine ground limestone, 0.5-1 part of calcium hydrogen phosphate, 0.3-0.4 part of salt, 0.2-0.3 part of an acidifier, 0-0.15 part of choline chloride, 0-0.08 part of L-lysine, 0-0.06 part of DL-methionine, 0-0.06 part of threonine, 0-0.1 part of sodium butyrate, 0-0.12 part of a mildew inhibitor, 0-0.1 part of Novasil, 0-0.02 part of a flavouring agent, 0.5-1.5 parts of a vitamin premix and 0.5-1.5 parts of a microelement premix. Based on the newest sows nutrition theory and by combination of production reality, feed energy, protein level, vitamin, mineral elements, dietary fiber and other ingredients are designed reasonably, and problems such as sow body overweight, fetal oversize, prolonged labor, constipation and the like which are caused by existing lactation feeds for Gongtai are overcome.

The invention discloses an emulsified piglet pellet feed and a preparation method thereof, and belongs to the technical fields of feeds and feed processing. The emulsified piglet pellet feed is mainly prepared from the following raw materials in parts by weight: 40-50 parts of corn, 1-3 parts of imported meat and bone meal, 5-10 parts of barley, 5-10 parts of wheat bran, 5-10 parts of rice bran, 5-10 parts of flour, 10-16 parts of bean pulp, 1-5 parts of extruded soybean, 2-5 parts of palm meal, 1-3 parts of an alfalfa extract, 0.5-1 part of soybean oil, 0.015 part of Bredol683, 1 part of water, 0.2-0.7 part of 65% lysine sulphate, 0.01-0.03 part of DL-methionine, 0.03-0.05 part of complex enzyme, 0.3-0.4 part of multi-vitamin, 0.2-0.6 part of complex trace elements and 1-5 parts of a complex microbial inoculant. The emulsified piglet pellet feed is scientific in formula; the hardness of the feed can be improved; the diarrhea of young animals is reduced; and the animal production performance is improved.

An animal feed mixture containing DL-methionyl-DL-methionine and salts thereof for animals kept in aquacultures is provided. Methods for preparing DL-methionyl-DL-methionine of formula (I)

and methods to fractionate the diasteriomeric forms obtained are also provided.

The invention relates to a feed for improving the survival rate of weaned newborn rabbits. The feed comprises the following components in percentage by weight: 15 to 23 percent of wheat shorts, 10 to 18 percent of wheat bran, 6 to 10 percent of pomace, 3 to 6 percent of puffed soybean flour, 4 to 9 percent of chrysanthemum powder, 18 to 23 percent of clover particles, 8 to 15 percent of oat grass, 1 to 3 percent of soybean meal, 4 to 7 percent of maize germ flour, 4 to 9 percent of rice bran cake, 0.1 to 0.2 percent of sodium sulfate, 0.3 to 0.5 percent of calcium hydrophosphate, 0.06 to 0.1 percent of sodium bicarbonate, 0.20 to 0.25 percent of edible salt, 0.10 to 0.15 of choline chloride, 0.10 to 0.15 percent of L-lysine, 0.10 to 0.15 percent of DL-methionine, 0.05 to 0.08 percent of rabbit multi-vitamin, 0.10 to 0.15 percent of disinfectant, 0.01 to 0.05 percent of soybean fiber, 0.20 to 0.25 percent of metal trace elements, and 0.02 to 0.05 percent of xylooligosaccharide. The feed can improve the stress resistance of the rabbit, has stronger palatability, uses the sodium bicarbonate as buffer, contributes to normal work of endocrine system in stress state, and can neutralize acid generated in a pomace metabolizing process; and reasonable energy ratio of amino acid can improve the digestion absorption rate of the feed.

The invention relates to a beef cream-type perfume compound and a preparation method thereof. The beef cream-type perfume compound comprises the following raw materials in parts by weight: 10 to 30 parts of beef, 20 to 35 parts of cattle ossein, 5 to 10 parts of tallow, 0.05 to 0.5 part of prolease, 2 to 3 parts of acid hydrolyzed vegetable protein seasoning, 3 to 6 parts of yeast extract, 4 to 6 parts of white granulated sugar, 1 to 2 parts of glucose, 2 to 4 parts of xylose, 3 to 9 parts of spice, 0.8 to 1.1 parts of L- cysteine, 0.4 part of DL-methionine, 0.2 to 0.5 part of L- leucine, 13 to 25 parts of table salt and 0.3 to 1 part of xanthan gum. The beef cream-type perfume compound prepared by adopting the raw materials through the method is high in fragrance naturalness, thick and strong in fragrance and long in aftertaste. When the beef cream-type perfume compound is applied to a meat product, the high temperature resistance is good, the state is stable, and the layering phenomenon can be avoided.

The invention relates to a beaver rabbit feed, which belongs to the feed field. The beaver rabbit feed mainly comprises the components of robenidine hydrochloride, monensin, salinomycin, bacitracin, garlicin, feed yeast, feed grade magnesium sulphate, feed grade DL-methionine, feed grade L-lysine hydrochloride, common salt, sulfur, calcium hydrophosphate, copper element, zinc element, iron element, choline chloride and vitamin complex premix, etc. The beaver rabbit feed can ensure that the conception rate of female beaver rabbits is improved to more than 93 percent and even to 100 percent; by adopting the beaver rabbit feed, the survival rate at 60 days of the beaver rabbits in the growing period can be improved to about 95 percent, and the growth cycle can be reduced by about half a month; simultaneously the growth of the hair of the beaver rabbit can be promoted, and the density, thickness uniformity and color brightness of the hair can be improved.

The invention discloses a puffed demersal crucian carp mixed feed. The puffed demersal crucian carp mixed feed comprises, by weight, raw materials including fish meal 3-10 parts, pig meat powder 4-8 parts, corn protein powder 5-8 parts, insect protein powder 2-5 parts, fermented soybean meal 3-6 parts, soybean meal 15-20 parts, rapeseed meal 15-25 parts, cottonseed meal 5-15 parts, DDGS 6-15 parts, flour 15-20 parts, soybean oil 1.5-3 parts, monocalcium phosphate 2-3 parts, bentonite 1-3 parts, lysine hydrochloride 0.2-0.4 part, DL-methionine 0.05-0.2 part, choline chloride 0.05-0.1 part, decavitamin premix 0.3-0.6 part, vitamin C phosphate-35% 0.02-0.04 part, composite mineral substance premix 1.0-2.0 parts, taurine 0.01-0.03 part and inositol 0.01-0.03 part. The cost and coefficient of the feed are remarkably reduced, and pollution is reduced.

An anti-diarrhea complete formula feed for piglets comprises, by weight, 55-56 parts of extruded corn, 6-10 parts of broken rice, 13-18 parts of enzymatic soybean meal, 9.5-10 parts of low-protein whey powder containing 3% of CP, 3-5 parts of Peruvian steam fishmeal, 0.8-1 part of L-lysine hydrochloride, 0.13-0.18 parts of DL-methionine, 0.09-0.13 parts of L-tryptophan, 0.35-0.4 parts of L-threonine, 0.25-0.3 parts of L-valine, 0.1-0.15 parts of L-isoleucine, 0.18-0.2 parts of L-cystine, 0.08-0.12 parts of choline chloride, 0.83-0.88 parts of calcium hydrogen phosphate, 0.95-1 part of calcium carbonate, 0.8-0.88 parts of salt, 0.04 parts of a vitamin premix, 0.4 parts of a trace elements premix and 0.03-0.05 parts of other auxiliary additives. A feed nutrient ration is reduced, and reasonable burdening is carried out by treating an amount required by an NRC2012 piglet as a standard, so the digestible nutrient content of the feed is improved, thereby the feed resource is reduced, the nutrient draining amount of an animal is reduced, the intestinal digestion burden is reduced, and the diarrhea is mitigated.

The invention discloses a feed for weaned pigs. The feed comprises the following components: weaned pig feed core material, smashed microwave corn powder, smashed microwave bean powder, fermented bean meal, wheat middling, steam fish meal, high-fat whey powder, calcium hydrogen phosphate, an anthony pig compound premix, a compound acidifying agent, a compound emulsifying agent, choline chloride, an antioxidant, a mold removal agent, edible salt, 98 percent of lysine hydrochloride, DL-methionine and mountain flour. The preparation method for the feed comprises the following steps of: performing microwave treatment on corns and beans, then smashing and screening the corns and the beans, and proportionally mixing the components. According to the feed, the problem of weaning of anthony pigs is solved by weakening the weaning stress of the anthony pigs, improving the anti-virus capability of the anthony pigs and improving the immunity of the anthony pigs; the daily weight gain of the anthony pigs can be effectively increased; the material-to-meat ratio can be reduced; the diarrhea rate is reduced by over 3 percent; the daily feed intake is increased by over 6 percent, so that the anthony pigs have high stress resistance and immunity.

The invention discloses Chinese herbal medicine complete antimicrobial-free feed special for laying hens in the egg producing period and a preparation method thereof, and belongs to the technical field of animal feed. The defect that antibiotics are included in existing feed is overcome. The feed is prepared from, by weight, 420-580 parts of corn, 40-80 parts of extruded bean pulp, 40-100 parts of bran, 20-50 parts of rice bran, 50-100 parts of maize germ meal, 50-100 parts of DDGS, 50-100 parts of corn gluten meal, 20-40 parts of peanut meal, 5-10 parts of soya-bean oil, 7-9 parts of particle stone powder, 7-9 parts of shell powder, 4-6 parts of calcium hydrophosphate, 3-4 parts of salt, 0.5-1 part of choline chloride, 5-7 parts of L-lysine hydrochloride, 0.5-2 parts of DL-methionine, 0.5-3 parts of L-threonine, 10 parts of compound premix, 1 part of microecologic, 1 part of complex enzyme preparation and 30 parts of Chinese herbal medicine additive. The feed is suitable for being eaten by the laying hens in the egg producing period.

The invention relates to a feed which can improve the broiler production performance and a production method thereof; the feed comprises the following components based on weight proportion: 500-550 portions of corn, 120-160 portions of middling flour, 220-260 portions of basic material, 30-35 portions of bone meal, 8-12 portions of lard, 2-3 portions of lysine hydrochloride, 0.5-1 portion of DL-methionine, 0.5-1 portion of threonine, 2-6 portions of calcium carbonate, and 8-12 portions of 1% broiler premix. The invention uses rich non-conventional protein raw material to rationally prepare diets and greatly meets the nutrient type and quality needs of the broilers in the late stage; the invention also makes use of various non-conventional protein materials and amino acids to balance the dietary amino acid and meet the need on amino acid of the broilers to a maximum extent, so as to highly efficiently use the protein sources and economically utilize the feed protein; besides, the invention obviously makes use of the protein resources for throttling and helps to reduce the environmental pollution caused by nitrogen emissions in the breeding process, thereby improving the breeding environment.

The invention relates to an agent for intensifying fox immunity, wherein each 100g of the product comprises soybean powder 20-30g, fish meal 10-15g, fruit oligosaccharides 3-6g, Isomaltooligosaccharide 1-5g, bacillus 2-5g, bifidobacteria 3-6g, lactic acid bacteria 4-7g, saccharomycete 3-6g, astragalus root 1-3g, root of pilose asiabell 1.5-4g, soybean lecithin 2-5g, DL-methionine 0.5-1.0g, L-lysine 0.3-0.5g, composite vitamin 0.5-2.0g, calcium hydrogen phosphate 1.0-2.0g, and balancing maize flour.

The invention discloses a device for preparing DL-methionine salt. The device comprises a three-stage series kettle type reactor and a gas stripping tower, wherein a material inlet of the gas stripping tower is communicated with a material outlet of the third-stage kettle type reactor. The invention also discloses a method for preparing the DL-methionine salt by using the device. The method comprises the following steps of charging an aqueous solution of hydantoin and an aqueous solution of inorganic alkali in the three-stage series kettle type reactor, performing continuous three-stage reaction, and controlling the pressure in the three-stage series reactor to be between 1.4 and 2.6MPa; performing gradient temperature rising of the first-stage reactor from 50 DEG C to 100 DEG C, performing gradient temperature rising of the second-stage reactor from 100 DEG C to 140 DEG C, and performing gradient temperature rising of the third-stage reactor from 140 DEG C to 180 DEG C; and feeding the liquid flowing out of the material outlet of the third-stage reactor to the atmospheric pressure vapor stripping tower, and separating and recycling carbon dioxide and ammonia, wherein the liquid flowing out of the bottom of the tower is an aqueous solution of DL-methionine salt, and the mixed gas discharged from the top of the tower is used for recycling and preparing an aqueous solution of carbon dioxide and ammonia and can be circularly used for preparing the hydantoin. By the device and the method, gradient temperature rising is easy to realize, high-efficiency mixing is realized, reaction is complete, reaction speed is high, a small quantity of by-products are generated, and yield is high; and moreover, the device and the method can be used for realizing the refinement of the DL-methionine salt conveniently and efficiently, and the DL-methionine salt has high quality.

The invention discloses a shoat feed and a preparation method. The shoat feed is prepared from the following raw materials in a ratio: northeast corn, soybean meal CP43, rice bran meal, puffed soybean meal, Ronggang molasses yeast, citric acid residue meal, calcium hydrophosphate, calcium formate, 0.5 percent shoat premix, salt, 98.5 percent L-lysine hydrochloride, granular acidifying agent-II, 99 percent DL-methionine, 97 percent betaine hydrochloride Betaine [C5H11NO2], 98.5 percent L-threonine, Mycofix-Plus3.0, blue copperas, 98 percent L-tryptophan, phytase 5,000mu/g, 10 percent colistin sulfate, coated acetyl kitasamycin*500, and 1806Z-LUCTA. The preparation method comprises the following steps of: A, proportioning the raw materials according to the components and the weight ratio; B, crushing: crushing the raw materials by using a crusher respectively; C, mixing the crushed raw materials; D, drying and packing; E, inspecting; and F, metering and packing. The shoat feed has the advantages of reasonable formula, rich nutritional components, good taste and easy digestion, improves the immunologic function of shoats and is suitable for large-scale breeding.

The invention relates to a method for preparing meat flavor by using vegetable proteins, which comprises the following steps of: (1) carrying out pressure cooking on soybean meal for 20-40 min at a pressure of 0.05 MPa so as to carry out curing processing; (2) hydrolyzing the obtained object for 24 h at a temperature of 50 DEG C by using 1-2% of compound pancreatic enzyme; (3) adding 6% of glucose, 0.8% of L-cysteine and 0.4% of DL-methionine, and carrying out reaction on the obtained product for 60min at a temperature of 115 DEG C; and (4) carrying out filtration and concentration on the obtained product. Vegetable proteins can be soybean meal, corn proteins and peanut cakes, and the like. The composite pancreatic enzyme is composed of 60% of pancreatic enzymes and 40% of papain. According to the invention, meat flavor which produces intense and coordinated aromas can be prepared; and an intensive processing way of vegetable proteins is broadened.

The invention relates to low-protein biological feeds, which comprise the following components in parts by weight: 72 to 85 parts of corns, 6 to 18 parts of soybean meal, 3 to 6 parts of wheat bran, 0 to 1.5 parts of soybean oil, 0.4 to 0.8 part of limestone, 0.5 to 1.5 parts of calcium hydrogen phosphate, 0.3 to 0.6 part of table salt, 0.6 part of premix, 1 part of compound microecological preparation, 0.2 to 0.6 part of L-lysine, 0.05 to 0.12 part of DL-methionine, 0.03 to 0.08 part of L-tryptophan and 0.08 to 0.13 part of L-threonine, wherein the compound microecological preparation comprises butyric acid bacteria, fermentative lactobacillus and bacillus subtilis. According to the low-protein biological feeds, the utilization rate of a nitrogen source in animal feeds can be remarkably increased, the emission of the nitrogen source is reduced, the growth performance of animals can be improved, and remarkable technical effects are achieved.