CN105724782A - Controlled-release composite pre-mixing feed, preparing method and feed - Google Patents
Controlled-release composite pre-mixing feed, preparing method and feed Download PDFInfo
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- CN105724782A CN105724782A CN201610070555.2A CN201610070555A CN105724782A CN 105724782 A CN105724782 A CN 105724782A CN 201610070555 A CN201610070555 A CN 201610070555A CN 105724782 A CN105724782 A CN 105724782A
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Abstract
The invention discloses controlled-release composite pre-mixing feed and further discloses a preparing method of the composite pre-mixing feed and feed containing the controlled-release composite pre-mixing feed.The controlled-release composite pre-mixing feed comprises, by weight, 10-35 parts of multivitamin micro-capsules, 6-16 parts of compound amino acid micro-capsules, 3-15 parts of compound mineral substance micro-capsules, 1-8 parts of compound enzyme preparation micro-capsules, 0.5-5 parts of compound microorganism micro-capsules and 0.2-3 parts of compound acidifier micro-capsules.According to the controlled-release composite pre-mixing feed, the formula is reasonable, the nutrient content is high, and the feed conversion rate is high.The raw materials are processed in a micro-capsule clapping mode, the loss in the stomach of feed animals can be avoided, the additive amount of the composite pre-mixing feed in the feed is reduced, peculiar smell can be removed, and deliquescing of the composite pre-mixing feed is prevented.
Description
Technical field
The present invention relates to field of fodder, be specially a kind of slow release compound premixed feed and preparation method and feedstuff.
Background technology
Compound premixed feed it be by various different types of feed additives and load by formula and actual requirement
The homogeneous mixture that body or diluent are mixed.As trace element, vitamin and other composition are blended in one
The premix material risen.But, it is low generally to there is feed conversion rate in current compound premixed feed, nutritional labeling
Loss is serious, mixes uneven, and raw material is unstable, and the shortcoming such as easily become damp and rotten, and seriously limits feedstuff
The development of industry.
Summary of the invention
It is an object of the invention to overcome above-mentioned prior art defect, it is provided that a kind of nutrient content is high, feedstuff turns
Rate and utilization rate are high, can significantly improve animal immunizing power, premunition, improve breeding performonce fo animals simultaneously
A kind of slow release compound premixed feed.
The technical scheme is that and be achieved in that: a kind of slow release compound premixed feed, including following heavy
The raw material of amount part: compound vitamin microcapsule 10-35 part；Aminoacids complex microcapsule 6-16 part；Composite mineral matter
Microcapsule 3-15 part；Compound enzymic preparation microcapsule 1-8 part；Complex microorganism microcapsule 0.5-5 part；Compound acidulant is micro-
Capsule 0.2-3 part.
With improvement, the mineral in described composite mineral matter microcapsule includes macroelement and trace element, constant
Element and micronutrient levels are than for 1-10:1-5.Described macroelement be potassium, sodium, calcium, phosphorus, magnesium a kind of or
Several；Described trace element be copper, ferrum, zinc, manganese, iodine, cobalt, selenium, chromium one or more.
With improvement, including the raw material of following weight portion: compound vitamin microcapsule 28 parts；Aminoacids complex microcapsule
15 parts；Composite mineral matter microcapsule 8 parts；Compound enzymic preparation microcapsule 5 parts；Complex microorganism microcapsule 1.5 parts；
Compound acidulant microcapsule 0.5 part.
Further, the compound vitamin in described compound vitamin microcapsule selected from retinyl acetate, β-
Carotene, vitamin B1, vitamin B2, vitamin B6, vitamin B12, vitamin C, dimension are raw
Element D2, vitamin D3, vitamin E, vitamin K3, creatine, folic acid, nicotinic acid, nicotiamide, D-are general
Acid calcium, Bio, choline chloride, VBT hydrochlorate one or more.
Further, the aminoacids complex in described aminoacids complex microcapsule is lysine, methionine, color ammonia
Acid, arginine, histidine, leucine, isoleucine, phenylalanine, threonine, valine, silk ammonia
Acid, alanine, glutamic acid, aspartic acid, cystine, proline, hydroxyproline, tyrosine, half
One or more of cystine, glycine and wheat propylhomoserin.
Further, the compound enzymic preparation in described compound enzymic preparation microcapsule be amylase, alpha-galactosidase,
Cellulase, 1,4 beta-glucanase, glucoseoxidase, lipase, maltase, mannonase fruit
Glue enzyme, phytase, protease, keratinase, xylanase one or more.
Further, the complex microorganism in described complex microorganism microcapsule be Lactobacillus, addicted to yogurt bar
Bacterium, Lactobacillus plantarum, Lactobacillus bulgaricus, Deshi Lactobacillus, product Ruan's candida mycoderma, beer yeast,
Bacillus subtilis, Bacillus licheniformis one or more.
Further, the compound acidulant in described compound acidulant microcapsule is Pfansteihl, citric acid, rich horse
Acid, formic acid, acetic acid, propanoic acid, butanoic acid, sorbic acid, malic acid, tartaric acid, benzoic one or many
Kind.
A kind of preparation method based on slow release compound premixed feed, comprises the following steps:
1) compound vitamin microcapsule, aminoacids complex microcapsule, composite mineral matter microcapsule, compound enzymic preparation microcapsule,
The microcapsule of complex microorganism microcapsule and compound acidulant microcapsule all uses spray drying method to be prepared from；Wherein,
The microcapsule packaging material of described microcapsule and the mass ratio of core are 5-15:2-10, described microcapsule packaging material selected from chitosan, β-
One or more in cyclodextrin, methyl methacrylate, sodium alginate, epoxy resin.
2) weigh the compound vitamin microcapsule of formula ratio, aminoacids complex microcapsule, composite mineral matter microcapsule, answer
Synthase preparation microcapsule, complex microorganism microcapsule and compound acidulant microcapsule, put into stirring and evenly mixing in mixer,
Quantitative package and get final product.
A kind of pig's feed containing slow release compound premixed feed, including the raw material of following weight portion: Semen Maydis
50-75 part；Wheat bran 8-15 part；Bean cake 12-30 part；Fish flour 0-8 part；Calcium hydrogen phosphate 1-3 part；Stone powder 1-5
Part；Sodium chloride 0-1 part；Slow release compound premixed feed 0.05-0.1 part.
A kind of slow release compound premixed feed of the present invention, including the raw material of following weight portion: compound vitamin
Microcapsule 10-35 part；Aminoacids complex microcapsule 6-16 part；Composite mineral matter microcapsule 3-15 part；Compound enzymic preparation
Microcapsule 1-8 part；Complex microorganism microcapsule 0.5-5 part；Compound acidulant microcapsule 0.2-3 part.The present invention's is slow
Releasing compound premixed feed, formula is reasonable, nutrient content is high, feed conversion rate is high.Each raw material is all by micro-
Capsule is coated process, it is possible to avoid the loss in letting animals feed stomach, decreases compound premixed feed at feedstuff
In addition, simultaneously also can go to eliminate the unusual smell, prevent the deliquescence of slow release compound premixed feed.Compound dimension is raw
Element microcapsule enough make vitamin slowly discharge, it is possible to reduce pig stress, reduce disease, strengthen animal disease-resistant
Power.Aminoacids complex microcapsule enough makes aminoacid slowly discharge, and can improve animal meat, improve lean meat percentage,
Enzyme protein dosage can be saved, reduce feeding cost, improve the production efficiency of animal.Composite mineral matter microcapsule
Enough make mineral slowly discharge, can effectively prevent animal mineral deficiency from causing various disease, improve disease-resistant energy
Power, increases economic benefit.Compound enzymic preparation microcapsule enough makes enzyme preparation slowly discharge, and can improve animal digestion
Function, minimizing environmental pollution.Complex microorganism microcapsule can make microorganism slowly discharge, and regulates animal intestinal
Interior colony balance, improves immunity and the premunition of letting animals feed.Compound acidulant microcapsule enough makes acidulant
Slowly release, reduces the stimulation to animal the intestines and stomach, protects gastrointestinal mucosa, and the growth that can effectively suppress pathogenic bacteria is numerous
Grow the generation reducing the common diseases such as diarrhoea, improve the digestion and metabolism level of animal, decrease again fecal nitrogen simultaneously
With the discharge of urinary nitrogen, alleviate the pressure for the treatment of for cow manure.Meanwhile, the slow release compound premixing feeding the present invention closes
The pig body skin of feedstuff is pink, glossy, fast growth, and feed conversion rate is high, and disease occurs few；With
Time pigsty in stool odor substantially alleviate, to growing and fattening pigs in winter respiratory tract disease control have clearly effect.
Detailed description of the invention
Below in conjunction with embodiments of the invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment, only a part of embodiment of the present invention rather than complete wholely
The embodiment in portion.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creativeness
The every other embodiment obtained under work premise, broadly falls into the scope of protection of the invention.
Embodiment 1
A kind of slow release compound premixed feed, including the raw material of following weight portion: compound vitamin microcapsule 28 parts；
Aminoacids complex microcapsule 15 parts；Composite mineral matter microcapsule 8 parts；Compound enzymic preparation microcapsule 5 parts；Composite microbial
Thing microcapsule 1.5 parts；Compound acidulant microcapsule 0.5 part.Wherein, the constant of the mineral of composite mineral matter microcapsule
Element is 20% potassium, 30% sodium, 15% calcium, 15% phosphorus and the mixture of 20% magnesium, and trace element is zinc, often
Secondary element is 2:1 with the mass ratio of trace element；Compound vitamin in compound vitamin microcapsule is for including that dimension is raw
Element A acetas, beta-carotene, vitamin B1, vitamin C, vitamin E, the compound dimension life of inositol
Element, wherein, retinyl acetate is 3000-10000IU/g at the content of compound premixed feed；Compound
Aminoacids complex in aminoacid microcapsule is lysine, methionine, tryptophan, arginine, histidine, bright
Propylhomoserin, isoleucine, phenylalanine, threonine, valine, serine, alanine, glutamic acid, sky
Aspartic Acid, cystine, proline, hydroxyproline, tyrosine, cysteine, glycine and wheat propylhomoserin
Mixture；Compound enzymic preparation in compound enzymic preparation microcapsule include 20% amylase, 15% protease, 30%
Cellulase, 25% xylanase and 10% lipase；The complex microorganism of complex microorganism microcapsule is hay bud
Spore bacillus；Compound acidulant in compound acidulant microcapsule includes 10% malic acid, 35% lactic acid, 20% Fructus Citri Limoniae
Acid, 15% sorbic acid and 20% tartaric acid.
The preparation of compound vitamin microcapsule: be added to the water immersion 1h by gelatin, is then heated to 45 DEG C to complete
The most swelling packaging material solution that obtains, is then distributed to compound vitamin obtain encapsulating solution in packaging material solution, micro-
Capsule packaging material is added to 5:2 with compound vitamin core；Inert hot gas is sprayed, is dried to obtain compound dimension
Raw element microcapsule, in encapsulating solution, solid content is 25%, and the technological parameter of spray drying is: inlet temperature
Being 165 DEG C, atomizing pressure is 0.3Mpa, and charging rate is 10mL/min, and leaving air temp is 80 DEG C.
The preparation of aminoacids complex microcapsule: ethyl cellulose is joined dehydrated alcohol or methanol are dipped to molten
The swollen packaging material solution that obtains, is then distributed in packaging material solution obtain encapsulating solution, microcapsule bag by aminoacids complex
Material is added to 15:2 with aminoacids complex core；Inert hot gas is sprayed, is dried to obtain compounded amino
Acid microcapsule, in encapsulating solution, solid content is 30%, and the technological parameter of spray drying is: inlet temperature is
165 DEG C, atomizing pressure is 0.5Mpa, and charging rate is 20mL/min, and leaving air temp is 80 DEG C.
The preparation of composite mineral matter microcapsule: being added to the water beta-schardinger dextrin-to be completely dissolved obtains packaging material solution,
Then composite mineral matter is distributed in packaging material solution obtain encapsulating solution, microcapsule packaging material and composite mineral matter core
Material be added to 3:2；Inert hot gas is sprayed, is dried to obtain mineral microcapsule, solid in encapsulating solution
Thing content is 25%, and the technological parameter of spray drying is: inlet temperature is 150 DEG C, and atomizing pressure is 0.3Mpa,
Charging rate is 15mL/min, and leaving air temp is 80 DEG C.
The preparation of compound enzymic preparation microcapsule: being added to the water by gelatin, it is the most molten to gelatin to be warming up to 50 DEG C of stirrings
Solution obtains packaging material solution, then amylase, protease, cellulase, xylanase and lipase is disperseed
Obtaining encapsulating solution in packaging material solution, microcapsule packaging material is added to 5:10 with compound enzymic preparation core；Lazy
Spraying in property hot gas, be dried to obtain compound enzymic preparation microcapsule, in encapsulating solution, solid content is 25%,
The technological parameter being spray-dried is: inlet temperature is 130 DEG C, and atomizing pressure is 0.3Mpa, and charging rate is
20mL/min, leaving air temp is 60 DEG C.
The preparation of complex microorganism microcapsule: be added to the water immersion 2h by gelatin, is then heated to 45 DEG C to complete
The most swelling packaging material solution that obtains, is then distributed to complex microorganism obtain encapsulating solution in packaging material solution, micro-
Capsule packaging material is added to 15:2 with complex microorganism core；Inert hot gas is sprayed, be dried to obtain compound
Microorganism microcapsule, in encapsulating solution, solid content is 30%, and the technological parameter of spray drying is: air intake temperature
Degree is 130 DEG C, and atomizing pressure is 0.3Mpa, and charging rate is 20mL/min, and leaving air temp is 60 DEG C.
The preparation of compound acidulant microcapsule: being added to the water by gelatin is dipped to complete swelling and obtains packaging material solution,
Then various compound acidulants are distributed in packaging material solution obtain encapsulating solution, microcapsule packaging material and compound acidifying
Agent core be added to 15:2；Inert hot gas is sprayed, is dried to obtain complex microorganism microcapsule, embedding
In solution, solid content is 30%, and the technological parameter of spray drying is: inlet temperature is 130 DEG C, atomization pressure
Power is 0.3Mpa, and charging rate is 20mL/min, and leaving air temp is 60 DEG C.
Weigh the compound vitamin microcapsule of formula ratio, aminoacids complex microcapsule, composite mineral matter microcapsule, be combined
Enzyme preparation microcapsule, complex microorganism microcapsule and compound acidulant microcapsule, put into stirring and evenly mixing in mixer, fixed
Amount is packed and be get final product.
Embodiment 2
A kind of slow release compound premixed feed, including the raw material of following weight portion: compound vitamin microcapsule 28 parts；
Aminoacids complex microcapsule 15 parts；Composite mineral matter microcapsule 8 parts；Compound enzymic preparation microcapsule 5 parts；Composite microbial
Thing microcapsule 1.5 parts；Compound acidulant microcapsule 0.5 part.Wherein, the compound vitamin in compound vitamin microcapsule
For including vitamin B2, vitamin B6, vitamin B12, vitamin C, vitamin D2, vitamin D3
Compound vitamin wherein, vitamin C is 500-5000mg/g at the content of compound premixed feed；Compound
Aminoacids complex in aminoacid microcapsule be lysine, methionine, threonine, tryptophan, histidine mixed
Compound；The macroelement of the mineral of composite mineral matter microcapsule is sodium, and trace element is copper, ferrum, zinc, manganese,
Copper: ferrum: zinc: the content of manganese is 10:1 than the mass ratio for 5:1:3:5, macroelement and trace element；Multiple
Compound enzymic preparation in synthase preparation microcapsule includes 45% amylase, 50% protease and 5% phytase；Compound
The complex microorganism of microorganism microcapsule is that 25% Lactobacillus, 38% Lactobacillus bulgaricus and 37% produce Ruan
Candida mycoderma；The compound acidulant of compound acidulant microcapsule includes 25% citric acid, 35% phosphoric acid, 10% Fructus Mali pumilae
Acid and 5% lactic acid.
The preparation of compound vitamin microcapsule: being added to the water beta-schardinger dextrin-to be completely dissolved obtains packaging material solution,
Then it is distributed to vitamin packaging material solution obtains encapsulating solution, then compound vitamin is distributed to packaging material
Obtaining encapsulating solution in solution, microcapsule packaging material is added to 5:2 with compound vitamin core；In inert hot gas
Middle spraying, being dried to obtain compound vitamin microcapsule, in encapsulating solution, solid content is 20%, is spray-dried
Time technological parameter be: inlet temperature is 150 DEG C, and atomizing pressure is 0.5Mpa, and charging rate is 20mL/min,
Leaving air temp is 60 DEG C.
The preparation of aminoacids complex microcapsule: being added to the water by gelatin, it is the most molten to gelatin to be warming up to 45 DEG C of stirrings
Solution obtains packaging material solution, and then aminoacids complex is distributed in packaging material solution obtain encapsulating solution, microcapsule bag
Material is added to 3:2 with aminoacids complex core；Inert hot gas is sprayed, is dried to obtain aminoacids complex
Microcapsule, in encapsulating solution, solid content is 15%, and the technological parameter of spray drying is: inlet temperature is
155 DEG C, atomizing pressure is 0.4Mpa, and charging rate is 25mL/min, and leaving air temp is 70 DEG C.
The preparation of compound enzymic preparation microcapsule: being added to the water by gelatin, it is the most molten to gelatin to be warming up to 45 DEG C of stirrings
Solution obtains packaging material solution, is then distributed to amylase, protease and phytase in packaging material solution be embedded
Solution, microcapsule packaging material is added to 5:2 with compound enzymic preparation core；Inert hot gas is sprayed, is dried
To compound enzymic preparation microcapsule, in encapsulating solution, solid content is 20%, and technological parameter during spray drying is:
Inlet temperature is 165 DEG C, and atomizing pressure is 0.4Mpa, and charging rate is 15mL/min, and leaving air temp is 80 DEG C.
The preparation of composite mineral matter microcapsule: be added to the water immersion 1h by gelatin, is then heated to 45 DEG C to complete
The most swelling packaging material solution that obtains, is then distributed to composite mineral matter obtain encapsulating solution in packaging material solution, micro-
Capsule packaging material is added to 5:2 with composite mineral matter core；Inert hot gas is sprayed, is dried to obtain grandidierite
Material microcapsule, in encapsulating solution, solid content is 25%, and the technological parameter of spray drying is: inlet temperature
Being 150 DEG C, atomizing pressure is 0.3Mpa, and charging rate is 15mL/min, and leaving air temp is 80 DEG C.
The preparation of complex microorganism microcapsule: be added to the water immersion 2h by gelatin, is then heated to 45 DEG C to complete
The most swelling packaging material solution that obtains, is then distributed to complex microorganism obtain encapsulating solution in packaging material solution, micro-
Capsule packaging material is added to 5:2 with complex microorganism core；Inert hot gas is sprayed, be dried to obtain compound micro-
Biological microcapsule, in encapsulating solution, solid content is 30%, and technological parameter during spray drying is: air intake temperature
Degree is 130 DEG C, and atomizing pressure is 0.3Mpa, and charging rate is 20mL/min, and leaving air temp is 80 DEG C.
The preparation of compound acidulant microcapsule: be added to the water immersion 1h by gelatin, is then heated to 45 DEG C to complete
The most swelling packaging material solution that obtains, is then distributed to citric acid and lactic acid in packaging material solution obtain encapsulating solution,
Microcapsule packaging material is added to 5:2 with compound lemon acid core；Inert hot gas is sprayed, be dried to obtain compound
Acidulant microcapsule, in encapsulating solution, solid content is 25%, and technological parameter during spray drying is: air intake
Temperature is 130 DEG C, and atomizing pressure is 0.3Mpa, and charging rate is 20mL/min, and leaving air temp is 60 DEG C.
Weigh the compound vitamin microcapsule of formula ratio, aminoacids complex microcapsule, composite mineral matter microcapsule, be combined
Enzyme preparation microcapsule, complex microorganism microcapsule and compound acidulant microcapsule, put into stirring and evenly mixing in mixer, fixed
Amount is packed and be get final product.
Embodiment 3
A kind of slow release compound premixed feed, including the raw material of following weight portion: compound vitamin microcapsule 25 parts；
Aminoacids complex microcapsule 16 parts；Composite mineral matter microcapsule 7 parts；Compound enzymic preparation microcapsule 5 parts；Composite microbial
Thing microcapsule 3 parts；Compound acidulant microcapsule 2 parts.Wherein, the constant unit of the mineral of composite mineral matter microcapsule
Element includes 50% sodium and 50% calcium, and trace element is the mixing of copper, ferrum, zinc, manganese, iodine, cobalt, selenium and chromium
Thing, macroelement is 2:1 with the mass ratio of trace element；Compound vitamin in compound vitamin microcapsule includes
Vitamin C and the compound vitamin of vitamin E；Aminoacids complex in aminoacids complex microcapsule includes 30%
Lysine, 50% methionine and 20% threonine；Compound enzymic preparation in compound enzymic preparation microcapsule includes 80%
Amylase and 20% protease；The complex microorganism of complex microorganism microcapsule is Bacillus licheniformis；Compound-acid
The compound acidulant of agent microcapsule includes 50% citric acid and 50% benzoic acid.
The preparation of compound vitamin microcapsule: being added to the water beta-schardinger dextrin-to be completely dissolved obtains packaging material solution,
Then it is distributed to vitamin packaging material solution obtains encapsulating solution, then compound vitamin is distributed to packaging material
Obtaining encapsulating solution in solution, microcapsule packaging material is added to 5:2 with compound vitamin core；In inert hot gas
Middle spraying, being dried to obtain compound vitamin microcapsule, in encapsulating solution, solid content is 25%, is spray-dried
Technological parameter be: inlet temperature is 150 DEG C, and atomizing pressure is 0.4Mpa, and charging rate is 20mL/min,
Leaving air temp is 60 DEG C.
The preparation of aminoacids complex microcapsule: being added to the water by gelatin, it is the most molten to gelatin to be warming up to 50 DEG C of stirrings
Solution obtains packaging material solution, and then aminoacids complex is distributed in packaging material solution obtain encapsulating solution, microcapsule bag
Material is added to 15:2 with aminoacids complex core；Inert hot gas is sprayed, is dried to obtain compounded amino
Acid microcapsule, in encapsulating solution, solid content is 25%, and the technological parameter of spray drying is: inlet temperature is
150 DEG C, atomizing pressure is 0.4Mpa, and charging rate is 25mL/min, and leaving air temp is 70 DEG C.
The preparation of composite mineral matter microcapsule: be added to the water immersion 1h by gelatin, is then heated to 45 DEG C to complete
The most swelling packaging material solution that obtains, is then distributed to composite mineral matter obtain encapsulating solution in packaging material solution, micro-
Capsule packaging material is added to 5:2 with composite mineral matter core；Inert hot gas is sprayed, is dried to obtain mineral
Microcapsule, in encapsulating solution, solid content is 25%, and the technological parameter of spray drying is: inlet temperature is
150 DEG C, atomizing pressure is 0.4Mpa, and charging rate is 15mL/min, and leaving air temp is 80 DEG C.
The preparation of compound enzymic preparation microcapsule: ethyl cellulose is joined dehydrated alcohol or methanol are dipped to molten
The swollen packaging material solution that obtains, is then distributed to amylase and protease in packaging material solution obtain encapsulating solution, micro-
Capsule packaging material is added to 5:2 with compound enzymic preparation core；Inert hot gas is sprayed, is dried to obtain compound enzyme
Preparation microcapsule, in encapsulating solution, solid content is 15%, and the technological parameter of spray drying is: inlet temperature
Being 130 DEG C, atomizing pressure is 0.5Mpa, and charging rate is 20mL/min, and leaving air temp is 80 DEG C.
The preparation of complex microorganism microcapsule: be added to the water immersion 2h by gelatin, is then heated to 45 DEG C to complete
The most swelling packaging material solution that obtains, is then distributed to complex microorganism obtain encapsulating solution in packaging material solution, micro-
Capsule packaging material is added to 5:2 with complex microorganism core；Inert hot gas is sprayed, be dried to obtain compound micro-
Biological microcapsule, in encapsulating solution, solid content is 30%, and the technological parameter of spray drying is: inlet temperature
Being 130 DEG C, atomizing pressure is 0.3Mpa, and charging rate is 20mL/min, and leaving air temp is 80 DEG C.
The preparation of compound acidulant microcapsule: be added to the water immersion 2h by gelatin, is then heated to 45 DEG C to complete
The most swelling packaging material solution that obtains, is then distributed to compound acidulant obtain encapsulating solution in packaging material solution, micro-
Capsule packaging material is added to 5:2 with compound acidulant core；Inert hot gas is spray-dried and obtains compound acidifying
Agent microcapsule.In encapsulating solution, solid content is 30%, and the technological parameter of spray drying is: inlet temperature is
130 DEG C, atomizing pressure is 0.3Mpa, and charging rate is 20mL/min, and leaving air temp is 80 DEG C.
Weigh the compound vitamin microcapsule of formula ratio, aminoacids complex microcapsule, composite mineral matter microcapsule, be combined
Enzyme preparation microcapsule, complex microorganism microcapsule and compound acidulant microcapsule, put into stirring and evenly mixing in mixer, fixed
Amount is packed and be get final product.
Embodiment 4
A kind of slow release compound premixed feed, including the raw material of following weight portion: compound vitamin microcapsule 10 parts；
Aminoacids complex microcapsule 16 parts；Composite mineral matter microcapsule 3 parts；Compound enzymic preparation microcapsule 1 part；Composite microbial
Thing microcapsule 5 parts；Compound acidulant microcapsule 3 parts.Wherein, the constant unit of the mineral of composite mineral matter microcapsule
Element is sodium, and trace element is 30% zinc, 13% cobalt, 17% selenium, 10% chromium, 15% bronze medal and 15% ferrum, constant
Element is 1:1 with the mass ratio of trace element；Compound vitamin in compound vitamin microcapsule is for including β-Hu Luo
The compound vitamin of Bu Su, vitamin B1, vitamin C, vitamin E, inositol, creatine and nicotinic acid；Multiple
Close the aminoacids complex in aminoacid microcapsule be lysine, methionine, tryptophan, arginine, histidine,
The mixture of leucine, isoleucine and phenylalanine；Compound enzymic preparation in compound enzymic preparation microcapsule includes
20% amylase, 30% protease and 50% cellulase；The complex microorganism of complex microorganism microcapsule includes
30% bacillus subtilis, 50% Lactobacillus bulgaricus and 20% Lactobacillus plantarum；In compound acidulant microcapsule
Compound acidulant be citric acid.
Above-mentioned compound vitamin microcapsule, aminoacids complex microcapsule, composite mineral matter microcapsule, compound enzymic preparation are micro-
The preparation method of capsule, complex microorganism microcapsule and compound acidulant microcapsule is same as in Example 1.
Weigh the compound vitamin microcapsule of formula ratio, aminoacids complex microcapsule, composite mineral matter microcapsule, be combined
Enzyme preparation microcapsule, complex microorganism microcapsule and compound acidulant microcapsule, put into stirring and evenly mixing in mixer, fixed
Amount is packed and be get final product.
Embodiment 5
A kind of slow release compound premixed feed, including the raw material of following weight portion: compound vitamin microcapsule 35 parts；
Aminoacids complex microcapsule 6 parts；Composite mineral matter microcapsule 15 parts；Compound enzymic preparation microcapsule 8 parts；Composite microbial
Thing microcapsule 0.5 part；Compound acidulant microcapsule 0.2 part.Wherein, the constant of the mineral of composite mineral matter microcapsule
Element is magnesium, trace element be 10% bronze medal, 15% ferrum, 20% zinc, 10% manganese, 15% iodine, 10% cobalt, 10%
Selenium and 10% chromium, macroelement is 1:5 with the mass ratio of trace element；Compound dimension in compound vitamin microcapsule
Raw element is vitamin C；Aminoacids complex in aminoacids complex microcapsule be lysine, methionine, tryptophan,
Arginine, histidine, leucine, isoleucine, phenylalanine, threonine, valine, serine,
Alanine, glutamic acid, aspartic acid, cystine, proline, hydroxyproline, tyrosine, half Guang ammonia
Acid, glycine and the mixture of wheat propylhomoserin；Compound enzymic preparation in compound enzymic preparation microcapsule includes 50% starch
Enzyme, 10% alpha-galactosidase and 40% cellulase；The complex microorganism of complex microorganism microcapsule is that guarantor adds
Leah lactobacillus；Compound acidulant in compound acidulant microcapsule is malic acid.
Above-mentioned compound vitamin microcapsule, aminoacids complex microcapsule, composite mineral matter microcapsule, compound enzymic preparation are micro-
The preparation method of capsule, complex microorganism microcapsule and compound acidulant microcapsule is same as in Example 1.
Weigh the compound vitamin microcapsule of formula ratio, aminoacids complex microcapsule, composite mineral matter microcapsule, be combined
Enzyme preparation microcapsule, complex microorganism microcapsule and compound acidulant microcapsule, put into stirring and evenly mixing in mixer, fixed
Amount is packed and be get final product.
Embodiment 6
A kind of pig's feed, including the raw material of following weight portion: Semen Maydis 64 parts；12 parts of wheat bran；Bean cake 19
Part；Fish flour 2 parts；Calcium hydrogen phosphate 1 part；Stone powder 2 parts；NaCl 0.3 part；Slow release compound premixed feed
0.1 part.Above-mentioned raw materials is joined mix homogeneously in batch mixer, then quantitative package finished product.Wherein slow release
Compound premixed feed is prepared by embodiment 2.
Embodiment 7
Pig's feed prepared by a kind of compound premixed feed based on embodiment 1 preparation, including following weight
The raw material of part: Semen Maydis 50 parts；15 parts of wheat bran；Bean cake 30 parts；Calcium hydrogen phosphate 3 parts；Stone powder 1 part；NaCl
1 part；Slow release compound premixed feed 0.1 part.Above-mentioned raw materials is joined mix homogeneously in batch mixer, then
Quantitative package finished product.
Embodiment 8
Pig's feed prepared by a kind of compound premixed feed based on embodiment 3 preparation, including following weight
The raw material of part: Semen Maydis 75 parts；8 parts of wheat bran；Bean cake 12 parts；Calcium hydrogen phosphate 3 parts；Fish flour 8 parts；Stone
5 parts of powder；Slow release compound premixed feed 0.5 part.Above-mentioned raw materials is joined mix homogeneously in batch mixer, so
Rear quantitative package finished product.
Test 1
The feedstuff embodiment of the present invention 6 prepared, as process group, does not adds in feedstuff embodiment 6 prepared
Add the identical feedstuff of other proportionings of slow release compound premixed feed as a control group, persistently feed 3 months.Choosing
Take farrowing sow and all use conventional method as subjects, sow feeding mode and daily management.
Table 1 feeds containing the slow release compound premixed feed of the present invention impact on sow
As known from Table 1, use feeds containing sow death toll after slow release compound premixed feed of the present invention obvious
Reducing, number born per litter improves 0.21, and dead-wood tire ratio reduces by 2.74%.The health status of sow obtains
Improving, production performance is significantly improved, and illustrates that sow is played good health care by slow release compound premixed feed
Effect.
Test 2
1, materials and methods
1.1 experimental animal
Test is carried out on Shunde pig farm.Testing by sow kind is long white and DABAI two-way cross boar,
Amounting to 508, piglet breeds is produced DLY three way cross kind by above-mentioned sow with the hybridization of Duroc breeding boar,
Raw 5245 porklings of common property.During testing, all sows and piglet carry out vaccine by normal immune programme for children and connect
Kind, and be managed in the usual way.
1.2 testing program
Above-mentioned test is carried out random packet with pig in the case of not affecting normal production management, wherein
Test group sow amounts to 251, and what it was given a birth amounts to 2415 piglets as piglets group；Matched group
Sow 257, what it was given a birth amounts to 2340 piglets as piglet matched group.Test group feeds embodiment
The pig's feed of 6 preparations, begins to use from breeding；Test group piglet is also fed same feedstuff, from seven days
Groove is taught age to start to add until nursery house is delivered for sale.Without any antibiosis in test group sow feed during test
Element, piglet starts to latter seven days feed formulations per ton of wean to use 500 grams of sharp proceomycin in wean.Matched group
Feed the pig's feed for the embodiment 6 without slow release compound premixed feed that sow feeds with piglet,
Other are identical with test group.The sow of matched group and the piglet that produced thereof are by original prophylactic side, this pig farm
Case feedstuff add routine dose antibiotic (sow antenatal postpartum feed add profit proceomycin 1000 g ton,
Amoxicillin 300 g ton；Sow group monthly adds sulfamonomethoxine, TMP and tylosin on the 1st week and enters
Row daily health caring medication).
1.3 observation index
During whole test, viewing test swinery and the sow of comparison swinery and the health status of piglet, bag
Include skin, by hair and discharge of eye.And record the dead head during the stillborn fetus number of Farrowing, piglets
Number, carries out statistical analysis.
2, result and analysis
The impact on sow production performance of the slow release compound premixed feed of 2.1 present invention
During whole test, the sow incidence no significant difference of test group and matched group.But with compare
Group is compared, test group sow skin ruddy clean, by hair short and neat bright, eyes are limpid god, canthus
Without obvious secretions.Each group sow son alive and stillborn fetus number (its after the feedstuff of sow feeding embodiment 6 preparation
Middle stillborn fetus is divided into again mummy stillborn fetus and fresh stillborn fetus) statistical result be shown in Table 2.
Table 2: test Farrowing (extremely) alive young rate statistics
By data in table it can be seen that test group sow natimortality is only 5.77%, and the natimortality of matched group
12.75%, hence it is evident that higher than test group.Compare the ratio discovery shared by mummy stillborn fetus in stillborn fetus, use slow release
Only having 8 in 2563 piglets that the test group of compound premixed feed is produced is mummy tire, and mummy is dead
Tire rate is only 0.31%, and uses antibiotic to have 192 to be that mummy is dead as the matched group of feed additive
Tire, mummy fetal death incidence rate reaches 7.15%, for 23 times of test group.
In test, we feed the feedstuff of embodiment 6 preparation to 145 first farrowing sows, comparative additive
Useful life is to the stillborn fetus relation that a situation arises.It was found that the stillborn fetus number of Farrowing is along with feeding use
The prolongation of time and be decreased obviously, after using 5 weeks continuously, fetal death of sow rate drops to almost nil, and right
Still birth rate according to group first farrowing sow is 10%.
Before 2.2 weaned piglets and child care stage death condition
The slow release compound premixed feed prepared containing the present invention is fed sow and newborn piglet whole process respectively
After, compared with matched group, the regularity of the piglet growth of its test group is the best, fur is bright, spiritual shape
State is good, and these all illustrate that the slow release compound premixed feed of the present invention has the comprehensive merit improving pig immunity
Effect.
Table 3: porkling suckling, child care stage survival rate statistics
Record piglet is at suckling and the survival rate in child care stage and mortality rate.Result of the test shows, on suckling rank
Section, the mortality rate of test group is only 0.35%, and the mortality rate of matched group is 2.36%, for 7 times of test group.
In the child care stage, the mortality rate of test group is 1.32%, and the mortality rate of matched group is 3.66%, its mortality rate
For test group nearly 3 times.
3, discuss
The generation of Farrowing stillborn fetus often has direct relation with the health status of farrowing sow.And piglet birth
After, owing to environmental change is very big, so its mortality rate is the highest the most after birth.According to foreign study personnel
Statistics, in the piglet of all births, has the piglet of 30%～50% to die young before wean.Therefore, carry
The holistic health level of high sow and piglet can be greatly improved live young rate and newborn piglet survival ratio.This test
Carrying out during a large-scale pig farm manages dynamically, it is pre-that test uses the slow release of the present invention to be combined
Mixed fodder, observes it and parturient sow is produced the core in dead young number and these Swine Production of piglet survival ratio
The impact of index.Result shows, adds the test component of the feedstuff slow release compound premixed feed containing the present invention
Childbirth sow is produced dead young digital display and is write attenuating, and produced piglet survival ratio is apparently higher than using antibiotic as interpolation simultaneously
The matched group of agent, demonstrates that the slow release compound premixed feed of the present invention can be greatly enhanced large-scale pig farm and support
The economic benefit that pig produces, improves the health level of swinery.
4, conclusion
The slow release compound premixed feed of the present invention has the effect improving immunity and having additional nutrients, so its
Comprehensive diseases prevention disease resisting effect and the promotion growth aspect of performance are far from general antibiotic and can reach.From above examination
Test result to reflect, use the slow release compound premixed feed of the present invention can reduce Farrowing exponentially dead
Tire rate and raising suckling and the survival rate of child care stage piglet, improve body constitution and by regulating the siberian crabapple of pig body
Unite and significantly improve sow and piglet health status.
Test 3
1, materials and methods
1.1 experimental animal
Choose the ablactational baby pig of 28-35 age in days, totally 560, be randomly divided into 2 according to body weight phase approximately principle
Group, each group of 280 piglets.Matched group, average initial weight 8.3 ± 1.0kg；Test group, average initial weight 8.2
±0.75kg.Test period is 45d.
1.2 test daily rations: test uses corn-soybean meal diet, for test site from dispensing.
1.3 EXPERIMENTAL DESIGN
Matched group: basal diet prepares slow release compound premixed feed without embodiment 1；Test group: base
Plinth daily ration adds 0.1% embodiment 1 and prepares slow release compound premixed feed.
1.4 feeding and management
Test is planted pig farm Hunan group subordinate and is carried out, and feeding and management is carried out according to former feeding and management code.
1.5 detection methods and index
In each test day next day carry out weighing and ramming material, calculate average daily gain, average daily ingestion amount and
Feedstuff-meat ratio.
Average daily gain (kg/ days)=total augment weight sum (kg)/test natural law；
Average daily ingestion amount (the kg/ previous day)=total feed consumption rate (kg)/all survivals pig's head number sum (previous day)；
Feedstuff-meat ratio=a certain period consumed forage volume/contemporaneity body weight gain in weight.
Statistical analysis: test unit based on every pig, average initial weight, average end weight, average weight gain,
The indexs such as average daily gain use SPSS software, carry out t-check analysis and compare under oneway ANOVA
Difference (p < 0.01) between sample two-by-two.
1.6 Economic and Efficiency Analysis
Many feed consumptions cost=feed intake difference kg × feedstuff unit price unit/kg；Slow release compound premixed feed cost=reality
Feed intake × 0.1% × 66 yuan, border/kg；Net profit=(weightening finish difference kg × Carnis Sus domestica unit price unit/kg)-(consume more
Material cost+slow release compound premixed feed).
2, result and discussion
Feedstuff adds slow release compound premixed feed as shown in table 4 on the impact of nursery pig production performance.
Table 4 production performance analysis
Note: * represents that significant difference, * * represent that difference is the most notable.
As can be seen from Table 4, test group dead mortality compared with matched group is low by 5%；Average every many
Weightening finish 1.98kg, difference is the most notable；Average daily gain improves 47g, and difference is the most notable；Feedstuff-meat ratio have dropped
0.18.End weight 20kg and more than 30kg pig's head number proportion finds out that test group ratio is significantly greater than matched group,
The later stage being very beneficial for pig increases.
Additionally, feeding and management every day is observed, after test group feeds 5d, swinery fur is ruddy, energetic, searches for food
Amount height；After 25d, hair color, vigor effect become apparent from；After 42d off-test, pig build is slender, and skeleton draws
Long, it is very beneficial for the late growing stage of pig.
3, Economic and Efficiency Analysis
1, every pig weightening finish income: 1.98kg × 20 yuan/kg=39.6 unit/head；
2, survival rate additional income is improved: 600 yuan/head × 5%=30 unit；
3, input cost: 6650kg × 0.1% × 66 yuan/kg ÷ 280=1.57 yuan/head.
Therefore the slow release compound premixed feed adding the present invention in feedstuff can obtain every pig of child care stage only
Income 68.03 yuan.
4, conclusion
Test proves, it can make feedstuff-meat ratio decline, and only based on minimum 5%, just can save 6,930,000 tons every year
Above feed-use grain, the 6% of suitable China Semen Tritici aestivi annual production.Thus realize following target: the most effectively alleviate
The sharp contradiction 2. of grain supply and demand be greatly reduced grain-production and a large amount of greenhouse gas emissions of the course of processing and
Energy consumption, contributes to realizing low-carbon agriculture.Ablactational baby pig live pig speed can also be improved simultaneously, play reduction and raise
Form this effect.
Test 4
1, test material and method
1.1 test material
Select the fattening pig that body weight is about 65kg 120 of same pig house, be randomly divided into 2 groups, often group
60, (3 repetitions) is raised on point 3 hurdles, 20, every hurdle.Test pig uses pellet to feed, from
By searching for food and drinking water, during test, each group column home and feeding and management condition are identical, and health, disinfectant program are pressed
Pig farm conventional method is carried out.
1.2 test method
This test sets 2 groups, matched group and test group.Matched group is that cultivation company now coordinates by big pig full price
Feedstuff (65-100kg body weight is suitable for), test group is to add embodiment in 0.5% ratio on the basis of matched group
The slow release compound premixed feed of 3.The daily ration of 2 groups processes and is shown in Table 1.Daily ration is raised with reference to NRC (1998)
Foster standard combines company standard preparation, the trophic level of each group daily ration (including: digestible energy, crude protein, can
Digestible lysine, methionine etc. can be digested) identical.Diets of different nutrition level is shown in Table 5.
Table 5 tests daily ration composition and nutritional labeling
1.3 Testing index and method
In each test day next day carry out weighing and ramming material, calculate average daily gain, average daily ingestion amount and
Feedstuff-meat ratio.
Average daily gain (kg/ days)=total augment weight sum (kg)/test natural law；
Average daily ingestion amount (the kg/ previous day)=total feed consumption rate (kg)/all survivals pig's head number sum (previous day)；
Feedstuff-meat ratio=a certain period consumed forage volume/contemporaneity body weight gain in weight.
2, result of the test
1) pig growth performance and economic benefit are affected by the slow release compound premixed feed of the present invention
Table 6 pig growth performance result and economic benefit result
| Group | Head number | Starting weight (kg) | End weight (kg) | Daily gain (g) | Kilogram arbor acre broiler (first) |
| Matched group | 60 | 64 | 82.06 | 610 | 6.88 |
| Test group | 60 | 66 | 86.86 | 740 | 6.22 |
Note: do not represent letter with column data or be labeled with the expression difference of same letter not significantly (P>0.05), indicating the expression significant difference (P<0.05) of different letter.
As shown in table 6, the feed intake of test group pig is significantly higher than matched group, higher 250g than matched group, improves
12.95%；Average daily gain is significantly higher than matched group, higher 130g than matched group, improves 21.3%；Feedstuff-meat ratio
It is substantially less than matched group.Relatively kilogram arbor acre broiler, test group is lower 0.46 yuan than matched group, has saved cultivation
Cost.Finding through overtesting, test group pig body skin is pink, and glossy, outward appearance is improved；In pigsty
Stool odor is more obvious than matched group to be alleviated；Daily gain, feedstuff-meat ratio, reduction feed cost all have aobvious
Write and improve, improve economic benefit.
2) the slow release compound premixed feed of the present invention impact on growing and fattening pigs survival rate
In this test group, survival rate is 100%, only has a first-born disease in matched group, through individually nursing
Treat rehabilitation on the 7th and put back to Yuan Lan.
3) the slow release compound premixed feed of the present invention impact on fattening stage feedstuff-meat ratio
The impact on replacement gilt feedstuff-meat ratio of the slow release compound premixed feed of table 7 present invention
| Group | Head number | Head all weightening finishes (kg) | Head all feed consumptions (kg) | Feedstuff-meat ratio |
| Matched group | 60 | 30.10 | 78.17 | 2.60:1 |
| Test group | 60 | 34.13 | 80.83 | 2.37:1 |
The feed consumption situation of fattening stage, as shown in table 7, test group all increases weight at the head of fattening stage and is
34.13kg, the equal feed consumption of head is 80.83kg, and feedstuff-meat ratio is 2.37；Matched group all increases weight at the head of fattening stage
30.10kg, the equal feed consumption of head is 78.17kg, and feedstuff-meat ratio is 2.60, and the feedstuff-meat ratio of test group have dropped than matched group
8.85%.Such as table 3, matched group is 2.55 at the feedstuff-meat ratio of fattening stage, and the feedstuff-meat ratio of test group is 2.35；
Reducing feedstuff-meat ratio 0.2, fall is 7.84%.
3, conclusion
After growing-finishing pig has eaten the feedstuff of the slow release compound premixed feed being added with the present invention, pig body skin
Skin is pink, glossy, and outward appearance is improved；In pigsty, stool odor is more obvious than matched group simultaneously alleviates, right
Growing and fattening pigs in winter respiratory tract disease controls there is clearly effect；Meanwhile, by test data it is found that eat
With the growing and fattening pigs of the slow release compound premixed feed of the interpolation present invention no matter in daily gain, feedstuff-meat ratio, reduction
All it is significantly improved on feed cost, improves benefit.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within bright spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in this
Within bright protection domain.
Claims (10)
1. a slow release compound premixed feed, it is characterised in that include the raw material of following weight portion: compound
Vitamin microcapsule 10-35 part；Aminoacids complex microcapsule 6-16 part；Composite mineral matter microcapsule 3-15 part；Compound
Enzyme preparation microcapsule 1-8 part；Complex microorganism microcapsule 0.5-5 part；Compound acidulant microcapsule 0.2-3 part.
Slow release compound premixed feed the most according to claim 1, it is characterised in that described grandidierite
Mineral in material microcapsule includes macroelement and trace element, described macroelement and the matter of trace element
Amount ratio is 1-10:1-5.
Slow release compound premixed feed the most according to claim 1 and 2, it is characterised in that include with
The raw material of lower weight portion: compound vitamin microcapsule 28 parts；Aminoacids complex microcapsule 15 parts；Composite mineral matter
Microcapsule 8 parts；Compound enzymic preparation microcapsule 5 parts；Complex microorganism microcapsule 1.5 parts；Compound acidulant microcapsule 0.5
Part.
Slow release compound premixed feed the most according to claim 1 and 2, it is characterised in that described multiple
Close compound vitamin in vitamin microcapsule selected from retinyl acetate, beta-carotene, vitamin B1,
Vitamin B2, vitamin B6, vitamin B12, vitamin C, vitamin D2, vitamin D3, dimension are raw
Element E, vitamin K3, creatine, folic acid, nicotinic acid, nicotiamide, D-VB5 calcium, Bio, chlorination gallbladder
Alkali, VBT hydrochlorate one or more.
Slow release compound premixed feed the most according to claim 1 and 2, it is characterised in that described multiple
Close the aminoacids complex in aminoacid microcapsule be lysine, methionine, tryptophan, arginine, histidine,
Leucine, isoleucine, phenylalanine, threonine, valine, serine, alanine, glutamic acid,
Aspartic acid, cystine, proline, hydroxyproline, tyrosine, cysteine, glycine and wheat ammonia
One or more of acid.
Slow release compound premixed feed the most according to claim 2, it is characterised in that described constant unit
Element be potassium, sodium, calcium, phosphorus, magnesium one or more；Described trace element be copper, ferrum, zinc, manganese, iodine,
Cobalt, selenium, chromium one or more.
Slow release compound premixed feed the most according to claim 1 and 2, it is characterised in that described multiple
Compound enzymic preparation in synthase preparation microcapsule is amylase, alpha-galactosidase, cellulase, beta glucan
Enzyme, glucoseoxidase, lipase, maltase, mannonase pectase, phytase, albumen
Enzyme, keratinase, xylanase one or more.
Slow release compound premixed feed the most according to claim 1 and 2, it is characterised in that described multiple
Closing the complex microorganism in microorganism microcapsule is that Lactobacillus, bacillus acidophilus, Lactobacillus plantarum, guarantor add
Leah lactobacillus, Deshi Lactobacillus, product Ruan's candida mycoderma, beer yeast, bacillus subtilis, lichens bud
One or more of spore bacillus.
9. a preparation method for slow release compound premixed feed based on claim 1 or 2, its feature exists
In, comprise the following steps:
1) compound vitamin microcapsule, aminoacids complex microcapsule, composite mineral matter microcapsule, compound enzymic preparation microcapsule,
The microcapsule of complex microorganism microcapsule and compound acidulant microcapsule all uses spray drying method to make；Wherein, described
The microcapsule packaging material of microcapsule and the mass ratio of core are 5-15:2-10, and described microcapsule packaging material is fine selected from gelatin, ethyl
Dimension element, beta-schardinger dextrin-one or more.
2) weigh formula ratio step 1) the compound vitamin microcapsule prepared, aminoacids complex microcapsule, grandidierite
Material microcapsule, compound enzymic preparation microcapsule and complex microorganism microcapsule, compound acidulant microcapsule, put into mixer
Middle stirring and evenly mixing, quantitative package and get final product.
10. the feedstuff containing the slow release compound premixed feed described in claim 1 or 2, its feature
It is, including the raw material of following weight portion: Semen Maydis 50-75 part；Wheat bran 8-15 part；Bean cake 12-30 part；
Fish flour 0-8 part；Calcium hydrogen phosphate 1-3 part；Stone powder 1-5 part；Sodium chloride 0-1 part；Slow release compound premixing closes and raises
Material 0.05-0.1 part.
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| CN115251246A (en) * | 2021-04-30 | 2022-11-01 | 中国农业大学 | Feed additive, feed and application thereof |
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