44 results about "Slaughter weight" patented technology

A highly automated method and system for providing individual animal electronic identification, measurement and value based management of cattle in a large cattle feedlot. Through the use of (1) a computer system integrated with (2) automatic individual animal identification (3) multiple measurement and remeasurement systems with automatic data input and (4) a cattle handling and sorting system, animals are individually (a) identified and (b) measured by weight, external dimensions and characteristics of internal body tissue. With this information together with animal physiological characteristics and historical data, the computer system calculates the optimum (c) slaughter weight, (d) economic end point and (e) marketing date for shipment to a packing plant. After measurement, individual animals are (f) sorted by direction of the computer in response to calculations from the measurements. The computer system also calculates from individual animal data and other data (g) each animal's pro rata share of total feed intake for the animal's feed group. The computer system (h) stores individual animal measurement, performance and location data, which is used by management to (i) select animals for shipment from the feedlot for slaughter at the optimum time. Following an animal's shipment to a slaughter facility, its identification in the computer system is used to (j) correlate the live animal physical characteristics and performance data to the measured and evaluated carcass characteristics data obtained during the slaughter process and (k) build a data base to more accurately identify and measure value-based characteristics in subsequent animals produced and fed for more effective value-based selection and management of those animals.

The invention relates to the technical field of animal breeding and particularly provides a breeding method of a high-quality synthetic white pig line. The method utilizes existing domestic and overseas pig breed resources, a specialized line is bred according to a trait differentiation and selection principle, thus commercial pigs quicker to grow, higher in lean meat percentage, good in meat quality, strong in resistance and high in slaughtering weight uniformity are obtained through hybrid breeding of the specialized line, the problem existing in 'inner binary' and 'inner ternary' breeding systems can be solved, meanwhile local pig breed resources can be also effectively protected and utilized, high-quality pig breeds are provided for industrial large-scale breeding, and the heavy demands for high-quality pork of masses of consumers are met.

The invention discloses a formula of a feed of young meat wild pheasants in an earlier stage. The feed comprises the following constituents in parts by weight: 40-45 parts of corns, 16-24 parts of wheat, 15-22 parts of bean pulp, 7-11 parts of cabbage caterpillar meal, 5.2-6.5 parts of wheat bran, 4.4-5.8 parts of Chinese trumpet creeper powder, 3.5-5.5 parts of cottonseed hull fungus chaff, 2-4 parts of rapeseed meal, 1-2 parts of mountain flour, 1.2-2.4 parts of silkworm excrement, 1.5-2 parts of bone meal, 1-2 parts of yeast protein powder and 1.5-2.5 parts of modified zeolite particles. The feed is free from antibiotics, capable of meeting other nutritional needs, except for water, of the young meat wild pheasants, reasonable in formula, high in utilization rate, less in nutritional waste, beneficial to resource utilization, energy conservation and emission reduction, capable of protecting the environment, good in palatability, high in feed reward, and capable of achieving a feed-weight ratio of about 1.65:1 of pheasants of 14 days old; the feed can increase the survival rate of the young pheasants, the used raw materials are readily available, and the slaughtering weight of the pheasants of 120 days old can be improved by about 14.0%, thus obviously improving economic benefits.

The invention aims at providing a feed additive capable of enhancing broiler chicken immunity. The feed additive comprises the following compositions: alfalfa, calcium hydrogen phosphate, fish meal, limestone, aminophylline, choline, a Chinese herbal medicine mixture, lysine, methionine, composite vitamins, copper sulphate, ferrous sulphate, zinc sulphate, potassium iodide, sodium selenite, cobaltous chloride and L-lactic acid, wherein the Chinese herbal medicine mixture comprises licorice, raw rehmannia glutinosa, radix bupleuri, folium isatidis, radix astragali, forsythia suspense, platycodon grandiflorum, apricot kernel, dried orange peel and radix codonopsis. The feed additive is capable of enhancing broiler chicken immunity, supplementing nutrition needing by broiler chicken growth, preventing disease generation, improving broiler chicken stress ability, increasing slaughter weight of broiler chicken, reducing broiler chicken mortality and increasing economic benefit of farmers.

The invention relates to a four-section linear fattening feed technology for producing snowflake beef. At present, Japanese Kobe wagy is mainly introduced in the domestic market to serve as a provenance, crossbred cattle of local beef cattle breed serves as a bovine origin for producing snowflake beef, the snowflake beef is produced with the Japanese wagy fattening feed mode as reference, the slaughtering moon age is 30 months or more, the slaughtering weight is about 650 kg, and feed cost is high. The four-section linear fattening feed technology includes the following steps that castrated Houstain calves which are 2-3 months old, weaned and castrated, grow and develop well and weigh 80 kg or more are selected, according to the weight increasing law, protein and fat deposition law and the influence law of dietary nutrient level to body tissue, the whole fattening process of the castrated Houstain calves are divided into four stages, and stage weight increase indexes are set. The four-section linear fattening feed technology is used for producing the snowflake beef.

The invention discloses a formula of a feed of young broiler wild pheasants in a middle stage. The feed comprises the following components in parts by weight: 55-60 parts of corns, 25-30 parts of bean pulp, 4-8 parts of cottonseed meal, 3-6 parts of locust powder, 2-4 parts of puffed feather meal, 3.5-5.5 parts of cake scraps, 2.8-3.6 parts of manioc waste, 2.5-3.5 parts of apple pomace, 2.2-2.8 parts of tea seed shell meal, 2-3 parts of bone meal, 1.5-2.5 parts of dried blood and 1-2 parts of modified zeolite particles. The feed is comprehensive in nutrition, the nutritional requirement can be fully met, the feed conversion rate can be obviously improved, the feed waste is reduced, the palatability is high, the ingestion time is shortened, the feeding effect is good, and the feed to gain ratio of wild pheasants at the age of 30 days is about 2.12:1. Moreover, the fattening effect and speed of wild pheasants in a later stage are obviously improved, the slaughter weight of wild pheasants at the age of 120 days is improved by 17 percent, and the economic benefits are obviously improved.

The invention discloses organic concentrated feed. The organic concentrated feed is prepared from following raw materials in parts by weight: 3000 parts of medical stone powder, 2000 parts of fish meal, 900 parts of seaweed meal, 300 parts of white sugar, 300 parts of table salt, 900 parts of pumpkin stems, 2000 parts of shell powder and 600 parts of a traditional Chinese medicine additive. Compared with common feed, the feed adopting an organic feed additive has the advantages that the slaughtering weight, the net meat weight, the meat rate, the lean meat rate, the cooking loss rate, the cooking loss rate, the feed-to-meat ratio, the daily average gaining weight and the daily average material consumption amount of livestock are greatly improved; although the feed intake is increased, the feed-to-meat ratio is better than that of a control group.

The invention relates to traditional Chinese medicine soluble powder for controlling infectious proventriculitis and ventriculitis in broiler chicken and a preparation method thereof. The soluble powder is made from, by weight, 8% of Astragalus root, 8% of root of hairy Asiabell, 8% of fried licorice root, 8% of common Anemarrhena rhizome, 8% of lightyellow Sophora root, 8% of Baical skullcap root, 8% of Chinese cork tree bark, 8% of jasmine fruit, 8% of cuttlebone, 4.8% of Chinese Atractylodes rhizome, 4.8% of fried peony root, 4.8% of weeping Forsythiae capsule, 4.8% of figwort root, 4.8% of Chinese goldthread rhizome, and 4% of tangerine peel. The raw materials are decocted, filtered, frozen and crushed into the soluble powder. The soluble powder as a traditional Chinese medicine preparation is capable of effectively controlling the occurrence and development of infectious proventriculitis and ventriculitis in broiler chicken, capable of treating both symptoms and root causes, high in cure rate, convenient to dose and free of drug resistance and drug residue; the soluble powder helps improve gastrointestinal function and immunity of the chicken, decrease death rate and feed conversion ratio and increase slaughter weight.

The invention discloses paenibacillus polymyxa LCP-01, a complex microbial inoculant compounded by the paenibacillus polymyxa LCP-01 and bile acid and application of the complex microbial inoculant. The classification name of the paenibacillus polymyxa LCP-01 is Paenibacillus polymyxa, the paenibacillus polymyxa LCP-01 is preserved in the China General Microbiological Culture Collection Center, and the preservation number of the paenibacillus polymyxa LCP-01 is CGMCC No.20819; and the bacterial colony of the bacterial strain is round, quasi-round or oval, beige, smooth and lusterless in surface and opaque, the diameter is 3-5 mm, and the edge of the bacterial colony is in an irregular wavy shape and is provided with a semitransparent edging. The invention further provides a complex microbial inoculant prepared by compounding paenibacillus polymyxa LCP-01 bacterial powder and bile acid. The complex microbial inoculant can effectively remove maternal toxins of meat ducklings, protect livers and intestines of the meat ducks, can promote growth of the meat ducks, can increase the slaughter weight of the meat ducks, can reduce the feed conversion ratio and can improve the breeding benefits of the meat ducks.

The invention discloses a special compound feed for capons and a preparation method of the special compound feed. The special compound feed for capons comprises the following components according to weight percent: 55%-65% of corns, 20%-30% of bean pulp, 1%-5% of rapeseed pulp, 1%-5% of fish meal, 1%-5% of rice bran, 1%-4% of fish oil, 0.8%-1.5% of mountain flour, 0.8%-1.5% of calcium hydrophosphate, 0.025%-0.035% of compound vitamins, 0.10%-0.14% of compound mineral substances and 0.7%-1.5% of nutritional supplements. The special compound feed has the advantages that the preparation is simple, the nutrients are balanced, the nutritional requirements of the growth of capons can be met, and the slaughtering weight and the survival rate of capons can be effectively increased.

The invention provides total-pasture type mutton sheep mixed fodder with fine corn fodder replaced with broussonetia papyrifera leaves. The total-pasture type mutton sheep mixed fodder is characterized by being prepared from, by weight of dried materials, less than or equal to 13% of moisture, 40-45% of broussonetia papyrifera leaves, 20% of oat grass, 10-15% of alfalfa, 5-10% of pennisetum sinese roxb, 15-20% of rapeseed dregs or bean pulp and the balance crop straw; by means of a total-pasture type mutton sheep mixed fodder formula, the content of dietary crude protein is larger than or equal to 16%, the price per ton of the fodder can be controlled within 2000 yuan, the average slaughter weight of a 12- month-old sheep reaches 52 kilograms, the average daily gain of each sheep is 0.16 kilogram through mutton sheep breeding, and the pure profit of each mutton sheep can reach 650 yuan; 1500 qualified mutton sheep are output per year, the annual sales revenue is 2.808 million yuan, breeding cost is 1.833 million yuan, the profit is 0.975 million yuan, the economic benefit is raised by nearly 40% compared with that of a traditional fodder feeding mode, and a quite good economic benefit is obtained.

The invention discloses a Chinese herbal medicine formula for preventing and treating broiler colibacillosis, which belongs to the technical field for breeding broilers. The Chinese herbal medicine formula provided by the invention comprises the components as follows: 12-15 g of cptis chinensis, 10-13 g of sanguisorba officinalis, 6-8 g of isatis root, 9-11 g of astragalus mongholicus, 9-11 g of folium isatidis, 9-11 g of aloes, 12-15 g of honeysuckle, 10-12 g of radix scutellariae and 10-12 g of liquorice. The Chinese herbal medicine is weighed according to the formula ratio; the weighed Chinese herbal medicine is decocted and boiled twice through adding water; the decocted liquid and boiled liquid are combined together to be concentrated into aqueous solution; each 1 mL of aqueous solution comprises 1 g of crude drug; and then the aqueous solution is disinfected and filled under a sterile condition. The Chinese herbal medicine formula provided by the invention is capable of improving the immunity and premonition of the broiler, and has no drug tolerance and drug residue. The treating cost for the broiler is reduced; the slaughter weight of the broiler is improved to over 23.8%; and the economic benefit and the social benefit of broiler breeding are improved.

The invention discloses a precise feeding system and method for fattening pig individuals, and belongs to the technical field of livestock breeding. According to the technical scheme, the precise feeding system for the fattening pig individuals comprises a water drinking area, a feeding area, a selling area, a fence dividing scale arranged among the water drinking area, the selling area and the feeding area and provided with a first radio frequency identifier, and a one-way door arranged between the water drinking area and the feeding area. The multiple precise feeding devices are arranged in the feeding area, spaced and shielded from one another and provided with second frequency modulation recognizers respectively, the control center is electrically connected with the fence dividing scale, the first radio frequency recognizers and the precise feeding devices, and the electronic labels are worn on pigs. According to the precise feeding system for the fattening pig individuals, precise feeding is achieved, feed waste is reduced, the most economical nutritional requirements of the individual pigs are precisely met, the slaughtering weight is uniform, and the precise feeding method for the fattening pig individuals is provided, the pigs are automatically and precisely fed, the uniform weight is achieved, the pigs are automatically slaughtered, and labor is saved.

The invention belongs to the technical field of broiler feed preparation and broiler cultivation and particularly relates to a feeding method capable of increasing broiler productivity. The feeding method is characterized in that the compound feed of the second stage comprises corn, bean pulp, corn protein powder, flour, duck fat, sodium chloride, stone powder, calcium hydrogen phosphate, cholinechloride, amino acid, multi-vitamin and compound minerals; the compound feed of the fourth stage comprises corn, bean pulp, corn protein powder, flour, duck fat, sodium chloride, stone powder, calciumhydrogen phosphate, choline chloride, amino acid, multi-vitamin and compound minerals. The feeding method has the advantages the broiler feeding method is changed, the specific compound feed is prepared from each stage of the feeding method, the compound feed of each stage is scientific in proportion, feed cost is lowered evidently, the nutrition requirements of broiler growth can be satisfied, feed utilization rate is increased, broiler growth is promoted, and broiler slaughter weight and broiler productivity are increased.

The present invention discloses a feed for meat chickens and a preparation method thereof. The feed comprises the following materials: 100-150 parts of soybean cake, 80-120 parts of corns, 80-100 parts of peanut shells, 50-80 parts of rice bran, 30-50 parts of shell powder, 5-10 parts of radix astragali multi-vitamins, 3-8 parts of talcum powder, 12-15 parts of methionine, 5-20 parts of calcium hydrogen phosphate, 2-5 parts of silkworm excrement, 2-10 parts of bone meal, 8-15 parts of mulberry leaf powder, 5-15 parts of gypsum, 3-8 parts of radix platycodonis, 7-13 parts of fructus amomi, 10-18 parts of seaweed meal, 5-12 parts of vegetable oil, 20-35 parts of grapefruit skin, 3-9 parts of trace elements, 4-10 parts of amino acids, 0.5-1 part of polypeptide, 1-3 parts of anhydrous sodium sulphate, 0.5-1.5 parts of edible salt, and 0.3-0.8 part of a microbial fermentation agent. The preparation method comprises premix preparing, resuscitating, expanding culturing, fermenting and filtering. The feed for the meat chickens has functions of improving immunity, and preventing bacteria and inflammation, can effectively reduce incidence of diseases in the meat chickens, controls deaths of sick chickens, has a good intestinal absorption effect, at the same time enhances appetite of the meat chickens and increases slaughter weight of the meat chickens.

The invention belongs to the technical field of feeds, and particularly relates to a feed for improving the chicken quality of broilers and a use method thereof. The additive comprises the following raw materials in percentage by mass: 50.1%-55.6% of domestic corn, 22%-24.5% of third-grade soybean meal, 0.15%-0.3% of a dysentery fortunei extract, 2%-5% of full-fat soybeans, 5%-6% of yellow flour, 1.4%-2.9% of second-grade rice bran, 0.7% of stone powder, 0.9% of calcium hydrophosphate, 0.4%-0.6% of L-lysine hydrochloride, 3% of a premix, 1% of feather meal, 3%-3.5% of corn protein powder, 2.3%-3% of lard oil and 0.2% of table salt, and the sum of the total mass percentage is 100%. According to the feed, the dysentery fortunei extract is added and is mainly concentrated at a big chicken stage, so that the fat content of the broiler chicken can be effectively changed, the feed conversion ratio is improved, the slaughter weight of the broiler chicken and the oxidation resistance of the chicken meat are improved, and the chicken quality is improved.

The invention provides an immunization enhanced type piglet early-stage fodder. A method does not use plasma protein powder or intestinal villus protein powder in a fodder formula and adopts wall-broken and enzymolysis bee pollen; and the adding amount of the wall-broken and enzymolysis bee pollen is converted to 0.5-6 kilograms / ton according to a complete feed. The immunization enhanced type piglet early-stage fodder has the technical effects of improving the immunity of pig groups and improving the survival rate of pigs; and a lot of tests and inspections in a pig farm show that the average daily-increasing amount and the survival rate of nursery pigs are obviously improved, the slaughtering weight is increased, the morbidity is greatly reduced and the medicine use cost is reduced.

The invention relates to the field of poultry breeding, in particular to a method for improving the slaughter performance of Jinghai yellow chicken by MSTN genes. The method includes the steps: extracting genome DNA (deoxyribonucleic acid) of a sample to be detected; amplifying the genome DNA by a specific primer with the sequence shown as SEQ ID NO: 1-2 to obtain 186bp target fragments; performing SSCP (single strand conformation polymorphism) analysis for the target fragments; developing colors by silver staining after gel electrophoresis to obtain DNA SSCP spectrum; screening individuals with gene type AA according to banding patterns of the atlas. Statistic analysis indicates that the slaughtering weight, the breast muscle weight, the leg muscle weight, the eviscerated weight and the semi-eviscerated weight of the type AA individuals are remarkably higher than those of type GG individuals (P<0.05). The homozygotic type AA individuals can be fixed in offspring, and the detection method is simple, rapid and not affected by external environments.

The invention provides a method for clearing away heat and toxic materials of pigs. The method comprises the steps that firstly, pigs with the weight smaller than 25 kg are fed with pig feed capable of clearing away heat and toxic materials three times a day at the dosage of 1-2 kg for each pig; secondly, pigs with the weight being 25 kg or above are fed with the pig feed capable of clearing away heat and toxic materials three times a day until reaching the slaughtering weight, wherein pigs are leisurely grazed until being full in each time of feeding. The pig feed capable of clearing away heat and toxic materials is prepared by stirring compound feed with comprehensive nutrition value and a Chinese herbal additive at a certain weight ratio until even mixing is achieved, and the Chinese herbal additive is prepared from radix isatidis, radix et rhizoma rhei, caulis et folium argyreiae acutae, herba houttuyniae, herba bidentis bipinnatae, barbed skullcap herb, gypsum, erba elephantopi, licorice roots, radix scutellariae, almond kernels, cortex mori radicis, rhizoma phragmitis and radix platycodi at a certain weight ratio. The method for clearing away heat and toxic materials has the advantages of being environmentally friendly, safe, effective and simple; when pigs eat the pig feed for a long time, the immunity of pigs can be improved, the disease morbidity and the death rate can be reduced, and the quality of pork is improved.

The invention discloses an application of a bile acid complex microbial inoculant in preparation of a mutton sheep feed additive. The bile acid complex microbial inoculant is prepared from a parabacteroides distasonis bacterial suspension and bile acid, wherein the parabacteroides distasonis bacterial suspension is obtained by culturing and fermenting parabacteroides distasonis LCG-06 with the preservation number of CGMCC No.20820. The bile acid complex microbial inoculant is prepared from natural components, free of toxic and side effects and capable of remarkably increasing the growth speedof mutton sheep, promoting nutrient absorption and accelerating decomposition of fat in the mutton sheep, then the fat percentage of the mutton sheep is reduced, the slaughter weight and the slaughterrate of the mutton sheep are increased, the breeding income of the mutton sheep is increased, and therefore, the bile acid complex microbial inoculant has wide application prospects.

The invention relates to the field of poultry breeding and especially relates to a drinking water agent. The drinking water agent comprises plant polysaccharide, Vc, an organic acid and glucose. Experiments demonstrate that the drinking water agent provided by the invention obviously improves average slaughter weights and growth indexes of broiler chicks (P is smaller than 0.05), and obviously reduces the death rates (P is smaller than 0.05); in particular, in the experimental group 2 (embodiment 2), compared with the control group, the death rate is reduced by 8.21% while the average slaughter weight is improved by 4.22%. Promotion effects of the drinking water agent provided by the invention to growth and development of the broiler chicks are proven by the experiment results; moreover, the broiler chicks has stronger physiques, and the death rate of the broiler chicks during a production process is decreased. According to the comprehensive analysis above, survival rate of the broiler chicks is obviously improved after addition of the drinking water agent provided by the invention.

The invention relates to a compound feed for piglets. The compound feed comprises the following ingredients in parts by weight: 36 to 44 parts of northeast corn, 18 to 22 parts of puffed corn, 13 to 17 parts of puffed soybeans, 7 to 9 parts of soybean meal, 1.8 to 2.2 parts of Peru steam fish meal, 0.9 to 1.1 parts of white granulated sugar, 2.2 to 2.8 parts of glucose, 1.8 to 2.2 parts of whey powder, 0.9 to 1.1 parts of calcium hydrogen phosphate, 1.8 to 2.2 parts of rice bran meal, 3.6 to 4.4 parts of wheat middling and 2.2 to 2.8 parts of a core material for suckling pigs. Digestion and nutrient absorption are easy; and the proportion of puffed raw materials in finished product granules is high, and meanwhile, the content of antinutritional factors is low. The feed is good in palatability, is loved by the suckling pigs, is large in feed intake, and has a good daily gain index. The formula is scientific, blending is elaborate, and nutrition is comprehensive and balanced. The disease incidence of the piglets is low; and a weaned stress phenomenon is absent. Weaned stress can cause weight loss and growth stagnation of the piglets and has great influence on growth and development and slaughtering weight of the piglets in a later period.

The invention discloses a novel beef cattle fattening method. The method comprises the following steps of 1) constructing a cowshed, a silage pool and an ammoniation pool; 2) producing straw feed; and3) performing fattening and feeding, where a continuous fattening method and a later centralized fattening method are included, the continuous fattening method comprises the steps of starting to feedcalves with feed with the proportion of concentrated feed exceeding 65% and the proportion of coarse feed lower than 35% after weaning until the slaughter weight reaches 400-500 Kg, and the later concentrated fattening method comprises the following steps of starting to feed the calves with feed with the proportion of concentrated feed being 70% and the proportion of coarse feed being 30% after weaning, building a calf skeleton, starting to feed the calves with feed with the proportion of the concentrated being 40% and the proportion of the coarse feed being 60% when the weight reaches 250Kg,and quickly increasing muscles and fat until the slaughter weight reaches 450-600Kg. The method is easy to operate and high in practicability, the yield of beef cattle can be increased in a short time, and the breeding economic benefits are increased.

The invention discloses animal feed containing high-temperature-resisting xylanase. The animal feed is prepared from basic ration; the optimum temperature for degrading xylan by the high-temperature-resisting xylanase is 75DEG C; in addition, after the high-temperature-resisting xylanase is treated at the temperature of 90DEG C for 4 to 8 minutes, 42 to 65 percent of xylan degradation activity also can be retained. The animal feed containing the high-temperature-resisting xylanase, disclosed by the invention, is applied to improvement on body weight of an animal and / or conversion rate of feed, so that the slaughter weight of broiler chicken is increased by 2.33 to 3.49 percent, and the feed-to-meat ratio is reduced by 1.73 to 4.49 percent; daily grain and daily food consumption of weanling pigs can be increased, the conversion rate of the feed can be improved, and the diarrhea rate can be reduced.

The invention relates to a feed formula and a production technology of the feed formula, in particular to a formula of piglet feed and a production technology. The formula comprises 45-55kg corn, 45-55kg wheat, 4-6kg rice bran, 8-12kg bean cake, 0.8-1.3kg fish meal, 0.8-1.2kg bone meal, 0.3-0.5kg table salt, 0.4-0.6kg stone powder, 0.1-0.3kg copper sulfate, 0.1-0.2kg potassium sulfate, 0.01-0.03kg potassium iodate, 5000 international units of vitamin A, 500 international units of vitamin D, 20 international units of vitamin E, 10mg vitamin K, 15mg vitamin B and 10mg vitamin B2. According to the formula of the piglet feed and the production technology, the body immunity of a piglet can be improved; disease prevention and health care effects are better; an appetite of the piglet can be improved; intestinal tract absorption of the piglet is facilitated; the growth of the piglet is significantly promoted; the slaughtering weight is increased; the meat quality of a livestock product meets a pollution-free requirement; an export standard of the livestock product is met; and physical health of people is effectively ensured.

The invention discloses a high-yield breeding method for ptyas mucosus, and relates to the field of snake breeding. The breeding method comprises a first-stage culture method, a second-stage culture method and a third-stage culture method; and a first stage is 1-6 months old, a second stage is 7-15 months old, and a third stage is 16-18 months old. The method is performed according to demands of ptyas mucosus on nutrients in growth stages, the young ptyas mucosus first eating rate is improved, and the first eating rate is 95% or more; weight gain is quick, when the ptyas mucosus is cultured for 18 months, the weight is 3-5 jin, and a slaughter weight is achieved, so that the ptyas mucosus is ready for slaughter half a year in advance; grains are added to fodder, thus food richness is increased, nutrients are more balanced, meat supply is saved, and breeding costs are reduced.