CN111789189A

CN111789189A - Cow pellet feed and preparation method thereof

Info

Publication number: CN111789189A
Application number: CN202010456881.3A
Authority: CN
Inventors: 楚康康; 申跃宇; 马慧; 丛慧敏; 邓露芳; 郭刚; 麻柱; 于奎军; 白沥冰; 王欣; 郭亮; 辛娜; 徐红军; 张伟宏; 李军卫; 李明华; 张海博; 薛颖彬; 黄玉海; 宛加林
Original assignee: Beijing Sunlon Livestock Development Co ltd
Current assignee: Beijing Sunlon Livestock Development Co ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-10-20

Abstract

The application relates to a livestock raising technology, and particularly provides a dairy cow pellet feed and a preparation method thereof, wherein the dairy cow pellet feed comprises the following raw materials in parts by weight: 30 to 50 percent of corn, 15 to 20 percent of soybean meal, 3 to 7 percent of rapeseed meal, 33 to 40 percent of wheat flour, 0.5 to 5 percent of premix and 3 to 6 percent of bentonite; the feed particles are prepared by crushing corn, bean pulp and rapeseed meal, and then mixing and blending. According to comparison experiment verification, the pellet feed can improve the feed digestion rate and the conversion rate after being used with silage of a rest ground, and can effectively improve the milk yield.

Description

Cow pellet feed and preparation method thereof

Technical Field

The application relates to the technical field of livestock raising, in particular to a granulated feed for dairy cows and a preparation method thereof.

Background

The dairy cow breeding industry is developed, so that milk is produced, and the national living standard is improved; but also can efficiently and fully utilize the national soil resources, improve the ecological environment, optimize the agricultural structure and promote the economic development of the rural areas. Milk becomes a necessity of people's life at present, the current world health organization lists the per-capita milk product occupancy as a main index for measuring the living standard of people in one country, and a plurality of countries in the world adopt measures for expanding the production and consumption of milk products and advocate people to drink milk vigorously. The milk yield of the dairy cows is closely related to the feed supply of the dairy cows, and the use of hormones and chemical drugs can cause residue and pollution in milk, so that naturally bred dairy cows and milk products thereof become targets of vast consumers.

But affected by external environment, feed and the like, the milk yield and the milk quality of the dairy cows are affected due to poor milk secretion stability. First, the dairy cattle feed is often composed of relatively single coarse and fine materials, lacks high-quality and rich dietary nutrients, such as rich amino acids, vitamins, dietary fibers, mineral elements, trace elements, and the like, which causes the appetite, digestive ability, and diarrhea of the dairy cattle, and is not favorable for the healthy growth and milk production of the dairy cattle. Secondly, the heat source generated by the cow in the digestive metabolism process and the cow stomach of the cow are anaerobically fermented, so that a lot of heat sources are generated. However, along with global warming, hot weather in summer lasts for a long time, most of cattle farms have simple and crude cooling facilities, and even no cooling facilities, so that the cows have no appetite due to high temperature, normal lactation and reproduction are affected, the resistance of the body is reduced, the incidence of mastitis and the like is increased, the milk yield and the milk quality are finally reduced, and great economic loss is caused. Finally, high producing cows have a large feed intake and a vigorous metabolism, and excrete a large amount of feces and urine every day, and the transportation and excretion of these wastes depend on the functions of the circulatory system. In the dairy cattle raising, the problems can be solved by using a large amount of chemicals such as antibiotics for a long time, but the adverse effects such as drug residues and drug resistance exist. Therefore, the green functional additive for removing heat, resisting toxicity and enhancing immunity is of great significance for regulating the metabolism and immunity of the cow organism and enhancing the milk production performance of the cow.

In summary, most of the current dairy cow feed additives contain hormone drugs or other chemical drugs, which are easily harmful to dairy cows and cause low quality of dairy products, and for the above problems of dairy cows, many additives such as probiotics, oligosaccharides, microbial agents and the like are researched, but the additives are expensive and have limited efficacy.

On the other hand, the automatic milking equipment in the existing dairy farm is generally unmanned, and the dairy cow needs to go to the milking equipment by itself, so that if the dairy cow cannot enter the milking equipment in time, the milk yield is influenced, and the health of the dairy cow is possibly adversely affected.

Disclosure of Invention

In order to solve the technical problems, the application provides a dairy cow pellet feed and a preparation method thereof.

In a first aspect, the present application provides a dairy cow pellet feed comprising the following raw materials by weight: 30 to 50 percent of corn, 15 to 20 percent of soybean meal, 3 to 7 percent of rapeseed meal, 33 to 40 percent of wheat flour, 0.8 to 5 percent of premix and 3 to 6 percent of bentonite; pulverizing semen Maydis, soybean meal, and rapeseed meal, mixing, and making into feed granule.

According to an embodiment of the application, the raw materials by weight are as follows: 34.95% of corn; 17.77% of soybean meal; rapeseed meal, accounting for 5.99 percent; wheat flour, accounting for 35.95 percent; 0.75 percent of premix; 4.59 percent of bentonite, wherein the premix is a trace element ingredient, and the trace element ingredient comprises trace mineral elements, vitamins and antioxidants.

According to an embodiment of the application, the raw materials by weight are as follows: 32% of corn; bean pulp, accounting for 18 percent; 5% of rapeseed meal; wheat flour, accounting for 35 percent; 5% of premix; the bentonite accounts for 5%, the premix comprises 4% of ulva powder and 1% of trace element ingredients, and the trace element ingredients comprise trace mineral elements, vitamins and synthetic amino acids.

According to an embodiment of the present application, the premix comprises: the raw materials by weight ratio are: corn, accounting for 45 percent; 20% of soybean meal; rapeseed meal accounting for 4 percent; wheat flour, 23%; 4% of premix; the bentonite accounts for 4%, the premix comprises 3.25% of ulva pertusa powder and 0.75% of trace element ingredients, and the trace element ingredients comprise trace mineral elements, vitamins and synthetic amino acids.

According to an embodiment of the present application, the premix further comprises: one or more of natural edible spice extract, ethyl vanillin, alpha-ionone, sweet orange oil and silicon dioxide.

On the other hand, the preparation method of the dairy cow pellet feed comprises the following steps:

preparing a granular raw material comprising 30 to 50% of corn, 15 to 20% of soybean meal and 3 to 7% of rapeseed meal;

crushing the granular raw material;

preparing powdery raw materials comprising 33 to 40 percent of wheat flour, 0.8 to 5 percent of premix and 3 to 6 percent of bentonite;

mixing the crushed granular raw materials with the powdery raw materials;

and granulating the mixed raw materials by using granulating equipment to obtain the feed granules.

According to an embodiment of the application, the raw materials by weight are as follows: 34.95% of corn; 17.77% of soybean meal; rapeseed meal, accounting for 5.99 percent; wheat flour, accounting for 35.95 percent; 0.75 percent of premix; 4.59 percent of bentonite.

According to an embodiment of the present application, the premix comprises: trace mineral elements, vitamins and/or antioxidants.

According to an embodiment of the present application, the premix comprises: one or more of fennel, sesame oil, licorice, shallot powder, garlic powder, ginger and its extract, orange oil, citrus oil, pepper powder, citric acid, isobutyl acetate, butyl lactate and ethyl lactate.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:

the granulated feed for the dairy cows, provided by the embodiment of the application, adopts the bentonite added into the feed, and utilizes the fine lubrication effect of the bentonite, so that the production efficiency and the production capacity of a granulator can be obviously improved, and partial carriers and trace elements can be replaced, thereby reducing the power consumption and the cost of the finished feed. Bentonite is used as a binder for granulated feed. 3 to 6 percent of bentonite is added into the feed, so that the molar concentration of acetic acid and propionic acid can be increased, and the utilization efficiency of calcium, phosphorus and magnesium of the cattle can be improved. The granulated feed is supplied to the cows while milking operation is performed by a milking robot, the granulated feed can be accurately conveyed through a pipeline, and after main materials such as corn, bean pulp, rapeseed meal and wheat flour in the components are crushed, starch and fiber can be conveniently formed into compact granules, the water content of the obtained finished product is less than 12%, the density is 1.3g/cm3, and the formed granulated feed is fine in structure. Because this pellet feed structure is fine and close durable, can avoid forming the hardening and the jam of leaving over the powder in pipeline to guarantee the stability of system's operation, reduce clean cost.

And according to comparison experiment verification, the digestion rate and the conversion rate can be improved after the pellet feed is matched with silage of a rest ground, and the milk yield can be effectively improved.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.

In a first aspect, the present application provides a dairy cow pellet feed comprising the following raw materials by weight: 30 to 50 percent of corn, 15 to 20 percent of soybean meal, 3 to 7 percent of rapeseed meal, 33 to 40 percent of wheat flour, 0.5 to 5 percent of premix and 3 to 6 percent of bentonite; pulverizing semen Maydis, soybean meal, and rapeseed meal, adding premix and bentonite, and mixing to obtain feed granule.

According to the embodiment of the application, the bentonite is added into the granulated feed, and the fine lubrication effect of the bentonite is utilized, so that the production efficiency and the production capacity of the granulator can be obviously improved, and part of carriers and trace elements can be replaced, so that the power consumption and the cost of the finished feed are reduced. Bentonite is used as binder for granulated feed. 3 to 6 percent of bentonite is added into the feed, so that the molar concentration of acetic acid and propionic acid can be increased, and the utilization efficiency of calcium, phosphorus and magnesium of cattle can be improved. The granulated feed is supplied to the cows while milking operation is performed by a milking robot, the granulated feed can be accurately conveyed through a pipeline, and after main materials such as corn, bean pulp, rapeseed meal and wheat flour in the components are crushed, starch and fiber can be conveniently formed into compact granules, the water content of the obtained finished product is less than 12%, the density is 1.3g/cm3, and the formed granulated feed is fine in structure. Because this pellet feed structure is fine and close durable, can avoid forming the hardening and the jam of leaving over the powder in pipeline to guarantee the stability of system operation, reduce clean cost.

Example 1

According to the embodiment 1 of the application, the pellet feed comprises the following raw materials in parts by weight: 34.95% of corn; 17.77% of soybean meal; rapeseed meal, accounting for 5.99 percent; wheat flour accounting for 35.95 percent; 0.75 percent of premix; bentonite accounting for 4.59 percent, wherein the premix is a trace element ingredient, and the trace element ingredient comprises trace mineral elements, vitamins and antioxidants.

Wherein the premix can be selected from the existing trace element premix and mainly comprises the following components: trace mineral elements, vitamins and/or antioxidants.

On the other hand, the premix can also be provided with one or more of natural edible spice extract, ethyl vanillin, alpha-ionone, sweet orange oil, silicon dioxide and the like, so that the more obvious odor recognition degree of the pellet feed is improved, and the milking operation of milking robots for cows is induced.

In this embodiment, the premix is selected to include: vitamin A, vitamin D, vitamin E, nicotinic acid, etc.; and trace element (less than 0.01 wt%) additive such as ferrum, zinc, copper, manganese, iodine, cobalt, selenium, etc. Amino acid additives, such as protective lysine, methionine; rumen buffer control agent such as sodium bicarbonate, urease inhibitor, etc., and enzyme preparation such as amylase, protease, lipase, cellulolytic enzyme, etc.; active bacteria (probiotic) preparation, such as lactobacillus, Aspergillus, and yeast preparation. The addition of appropriate amount of vitamins and microelements can supplement nutrient substances, improve production performance, increase feed utilization rate, improve feed quality, promote growth and reproduction, and ensure health of milk cow. In a specific embodiment, the natural minerals for feeding are used for supplementing macroelements (elements accounting for more than 0.01 percent of the weight) such as calcium, phosphorus, magnesium, potassium, sodium, chlorine, sulfur and the like. Such as stone powder, calcium carbonate, calcium phosphate, calcium hydrogen phosphate, salt, magnesium sulfate, etc.

The bentonite used as the animal feed additive mainly utilizes the adsorbability, expansibility, dispersibility and lubricity of the bentonite, so that the additive can be uniformly mixed, the palatability of the feed and the looseness of the feed can be improved, the time of the feed passing through the digestive tract of animals can be delayed, the digestion and absorption effects of the feed in the digestive tract can be enhanced, and the bentonite has strong adsorption effect on heavy metals, harmful gases, bacteria and the like in the digestive tract, thereby playing a health-care role on the animals. Because the bentonite is an alkaline substance, the bentonite can neutralize acid in the alimentary canal of the animal to play a role in buffering, and the appetite of the animal is enhanced.

When non-protein nitrogen is added into the feed for ruminants, the bentonite is used as a coagulant and a diluent, so that the use safety and the utilization rate of the non-protein nitrogen can be improved.

The bentonite is properly added in the production of the granulated feed as a granulated feed adhesive, and the fine lubrication effect of the bentonite is utilized, so that the production efficiency and the production capacity of the granulator can be obviously improved, and part of carriers and trace elements can be replaced, thereby reducing the power consumption and the cost of the finished feed. Bentonite is used as a binder for granulated feed, or as a drying agent for producing high-moisture granulated feed, or as a buffering agent for feed. 3 to 4 percent of bentonite is added into the concentrate, so that the molar concentration of acetic acid and propionic acid can be increased, and the utilization efficiency of calcium, phosphorus and magnesium of the cattle can be improved.

The bentonite contains high mineral components and unique physical and chemical properties, and has good influence on digestion and substance metabolism of animal bodies and improvement on the productivity of dairy cattle. The feeding addition amount of the lactating cows can be 2.0-2.1% (300-350 g) of the dry matter of the daily ration, and the consumption amount of the replacement calves can be 3.0-3.1% (180-200 g) of the dry matter of the daily ration. The bentonite can completely avoid the deficiency of trace element salts which are necessary for daily ration, thereby not only reducing the feed cost, but also simplifying the feed processing technology.

Example 2

According to the embodiment 2 of the application, the pellet feed comprises the following raw materials in parts by weight: 32% of corn; bean pulp, accounting for 18 percent; 5% of rapeseed meal; wheat flour, accounting for 35 percent; 5% of premix; the bentonite accounts for 5%, the premix comprises 4% of ulva powder and 1% of trace element ingredients, and the trace element ingredients comprise trace mineral elements, vitamins and synthetic amino acids.

Among them, it can be understood by the art that ulva (U lva lactuca L.) belongs to the large-scale marine economic algae of ulva of the green algae phylum, which is widely distributed in the western pacific coastal region, and is a very abundant resource in wild algae in the southern sea area of our country.

Ulva contains abundant crude fiber, carbohydrate, protein and ash, and contains a small amount of fat. 12 kinds of amino acids have been analyzed from the crude protein, ulva contains various vitamins, wherein the content of VB12 and VC is higher than that of chlorella, and the polyphagia ulva can effectively prevent and treat vitamin deficiency. Analysis shows that ulva contains K, Na, Ca, Mg, Ni, Zn, Mo, Cu, I, F and other trace elements, and these trace elements have wide effect on growth, metabolism, physiological regulation and other aspects. In addition, according to the reports of related documents, the selenium content in the dried ulva is 5.980ug/g, which is obviously higher than that of 11 seaweeds such as kelp.

On the other hand, ulva has the function of reducing cholesterol and blood sugar. And the polysaccharides and glycoprotein in ulva have antiviral activity, can strongly inhibit the activity of reverse transcriptase, and play a role of a retrovirus inhibitor.

Although the taste and smell can be improved by using ulva in the embodiment, the smell identifiability and the diffusion distance are still slightly insufficient, and on the other hand, the premix can be also configured with one or more of natural edible spice extract, ethyl vanillin, alpha-ionone, sweet orange oil, silicon dioxide and the like, so that the more obvious smell identification degree of the pellet feed can be improved, and the milking robot can be attracted to perform the milking operation.

Example 3

According to the embodiment 3 of the application, the pellet feed comprises the following raw materials in parts by weight: corn, accounting for 45 percent; 20% of soybean meal; rapeseed meal accounting for 4 percent; wheat flour, 23%; 4% of premix; the bentonite accounts for 4%, the premix comprises 3.25% of ulva pertusa powder and 0.75% of trace element ingredients, and the trace element ingredients comprise trace mineral elements, vitamins and synthetic amino acids.

Among them, it can be understood by those skilled in the art that Ulva pertusa (U.p ertusaKjellm) is a large-scale marine economic alga in the genus Ulva of the genus Chlorophyta, which is widely distributed in the coastal region of the Western Pacific ocean and is an extremely abundant resource in the wild algae in the northern sea area of China.

Ulva pertusa is rich in crude fiber, carbohydrate, protein and ash, and contains a small amount of fat. 12 kinds of amino acids have been analyzed from the crude protein, the ulva contains a plurality of vitamins, wherein the content of VB12 and VC is higher than that of chlorella, and the polyphagia ulva can effectively prevent and treat vitamin deficiency. Analysis shows that ulva contains various trace elements such as K, Na, Ca, Mg, Ni, Zn, Mo, Cu, I, F and the like, and the trace elements have wide effects on aspects such as growth and development, metabolism, physiological regulation and the like. In addition, according to the report of related documents, the selenium content in the dried ulva is 5.980ug/g, which is obviously higher than that of 11 seaweeds such as kelp.

On the other hand, ulva pertusa also has the function of reducing cholesterol and blood sugar. And the polysaccharide and glycoprotein in the ulva pertusa have antiviral activity, can strongly inhibit the activity of reverse transcriptase and play a role of an antiretroviral inhibitor.

Although the ulva pertusa can be used to improve the taste and smell in this embodiment, the smell recognition degree and diffusion distance are still slightly insufficient, so on the other hand, the premix can be further configured with one or more of natural flavor extract, ethyl vanillin, alpha-ionone, sweet orange oil, silicon dioxide and the like, so as to improve the more obvious smell recognition degree of the pellet feed and induce the dairy cows to perform the milking operation by the milking robot.

According to the application, the granulated feed prepared in the embodiments 1 and 2 has the advantages that the milk yield of the dairy cows is averagely increased by 7 percent and the incidence rate of mastitis can be reduced by more than 30 percent according to the trial and comparison of multiple groups. The daily ration of the dairy cow is added with 5 percent of ulva powder, so that the feed intake can be promoted, the milk yield can be improved by more than 6 percent, the iodine content in the milk is obviously increased, the nutritional value of the milk is improved, the reproductive organ diseases and breast diseases of the dairy cow are obviously reduced, and the mating conception rate is improved.

Preparation examples

crushing the granular raw material;

preparing powdery raw materials comprising 33 to 40 percent of wheat flour, 0.5 to 1 percent of premix and 3 to 6 percent of bentonite;

mixing the crushed granular raw materials with the powdery raw materials;

3 to 5 percent of ulva powder is added into the feed of the dairy cow, so that the food intake of the dairy cow can be increased, and the milk yield can be improved by 6 percent. Meanwhile, because the seaweed contains rich iodine, the seaweed powder is used for feeding dairy cows, the iodine content in the milk is obviously increased, and the nutrient value of the milk is improved. The red algae contains astaxanthin, is antioxidant, contains algal protein, has certain anti-inflammatory effect, and can avoid side effect mastitis of milking operation.

34.95% of corn; 17.77% of soybean meal; rapeseed meal, accounting for 5.99 percent; wheat flour, accounting for 35.99 percent; 0.75 percent of premix; 4.59 percent of bentonite.

Nutrition level (% dry matter) of the granulate

The production process of the granulated feed for the milking robot mainly comprises the following steps: feeding, crushing, batching, mixing, granulating, cooling, screening and packaging for 8 stages.

1. A feeding stage: and (3) manually feeding, wherein all the raw materials enter a corresponding proportioning bin or a bin to be crushed through conveying equipment such as a scraper plate and a crusher.

2. And (3) a crushing stage: the required raw materials are crushed by a crusher according to production requirements, the crusher adopts a hammer type, the model SPSP 132X 45F and the power is 110KW, and crushing parameters are detailed in the following table.

Name of raw materials	Crushed particle size
		Bean pulp	Φ2.0mm
Corn and rapeseed meal	Φ3.0mm
		Wheat (Triticum aestivum L.)	Φ4.0mm

3. A burdening stage: the raw materials are crushed and then enter a proportioning bin. The batching process is divided into two steps, wherein the large material part is automatically batched by a computer, and the core material is manually fed. The weighing ranges of the two large-material batching scales are respectively 2T and 1T, and the range of the manual feeding rechecking scale is 0.5T. In the process of proportioning, the error is controlled to be +/-0.3 percent

4. And (3) mixing: the prepared materials enter the mixer through the batching scale. The mixer adopts a single-shaft double-blade type, model SJHS4.0A, power 37kw, mixing time 105 seconds, and mixing uniformity CV is less than or equal to 5%.

5. And (3) a granulation stage. The mixed materials enter a bin to be granulated and are firstly prepared. Adopts double-layer modulation, the steam pressure is 3-4MPa after decompression, the modulation temperature is 80-90 ℃, and the modulation time is 30 seconds. After the blending, the mixture enters a granulator to begin granulation. The model of the granulator is MUZL610, the power is 150KW, and the aperture phi of the ring die is 6.0 and the compression ratio is 1: 12.

Compression ratio	Particle hardness (mean)	Powder content (mean value)
			1：12	103	2.9

6. A cooling stage, adopting a counter-flow cooler, and cooling to obtain a product with a temperature not higher than 8 ℃ of the ambient temperature (11-3-15 ℃ in winter)

7. And (5) screening. And (3) adopting a rotary grading sieve and a double-layer screen, wherein the upper layer sieve is 20mm, the lower layer sieve is 5mm, packing the qualified products, feeding the undersize powder back to the granulator for re-granulation, and collecting impurities on the sieve.

8. And (5) a packaging stage. The water content of the finished product is required to be less than or equal to 14 percent, and the net weight of the product is +/-100 grams by adopting an automatic packing scale.

And (3) evaluating the use amount of the robot granular material: 5kg of granular feed is fed to each cow every day, the milk yield and the milking frequency of the cows are obviously higher than those of a granular feed group of 2.5 kg every day, so that the test shows that the granular feed feeding amount of each cow every day of the robot is 5.0 kg.

Influence (kg) of different dosage of robot granular material on daily milk yield of dairy cow

	2.5kg	5.0kg	SEM	P value
					0d	33.83	33.88	1.38	0.985
1-10d	35.52	37.98	0.49	0.022

Comparative experiment

Specifically, several conventional dairy cow granulated feeds are purchased to participate in a control test, and the control test comprises the following specific steps:

comparative example 1: the granulated forage for dairy cattle is made of alfalfa as a main material and is produced by Beijing Biotechnology Limited.

Comparative example 2: the granulated feed for cow is prepared with beet pulp as main material in certain feed factory in Shandong Binzhou.

Comparative example 3: the Henan Zhou Kou comprises the following main components: corn, bran and miscellaneous meal dairy cow pellet feed.

The method comprises the following steps: inventive examples 1, 2, 3 and comparative examples 1, 2, 3 were tested: selecting 30 black and white spotted cows in the prophase of lactation, which finish 5 +/-2 days after the first calving, as test cows, wherein the initial milk yield of the test cows is similar, and randomly dividing the 30 cows into a test group and a control group, wherein each group comprises 5 cows.

Under the same feeding management conditions, the milking time was 6 am and 6 pm, and the duration of the experiment was 12 days.

And (4) counting the daily milk yield of each head in the test period, and calculating the daily average milk yield (kg/day-head) in the test period. The milk protein rate and the milk fat rate are used as the quality indexes of the milk, and the measurement of the milk protein and the milk fat is carried out by GB/T5409 and GB/T5413.1.

The details of the control test are shown in Table 1

According to the pellet feed disclosed by the embodiment of the application, as shown in the table 1, according to the comparison experiment, the digestion rate and the conversion rate can be improved after the pellet feed is matched with silage of a rest ground, and the milk yield can be effectively improved.

The foregoing is merely exemplary of the invention, which can be understood and carried into effect by those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dairy cow pellet feed comprises the following raw materials by weight:

30 to 50 percent of corn, 15 to 20 percent of soybean meal, 3 to 7 percent of rapeseed meal, 33 to 40 percent of wheat flour, 0.8 to 5 percent of premix and 3 to 6 percent of bentonite;

pulverizing semen Maydis, soybean meal, and rapeseed meal, mixing with premix, and making into feed granule.

2. The dairy cow pellet feed as claimed in claim 1, wherein the raw materials are in the following ratio by weight: 34.95% of corn; 17.77% of soybean meal; rapeseed meal, accounting for 5.99 percent; wheat flour, accounting for 35.95 percent; 0.75 percent of premix; 4.59 percent of bentonite, wherein the premix is a trace element ingredient, and the trace element ingredient comprises trace mineral elements, vitamins and antioxidants.

3. The dairy cow pellet feed as claimed in claim 1, wherein the raw materials are in the following ratio by weight: 32% of corn; bean pulp, accounting for 18 percent; 5% of rapeseed meal; wheat flour, accounting for 35 percent; 5% of premix; the bentonite accounts for 5%, the premix comprises 4% of ulva powder and 1% of trace element ingredients, and the trace element ingredients comprise trace mineral elements, vitamins and synthetic amino acids.

4. The dairy cow pellet feed as claimed in claim 1, wherein the raw materials are in the following ratio by weight: corn, accounting for 45 percent; 20% of soybean meal; rapeseed meal accounting for 4 percent; wheat flour 23%; 4% of premix; the bentonite accounts for 4%, the premix comprises 3.25% of ulva pertusa powder and 0.75% of trace element ingredients, and the trace element ingredients comprise trace mineral elements, vitamins and synthetic amino acids.

5. The dairy cow pellet feed of claim 1 wherein the premix further comprises: one or more of natural edible spice extract, ethyl vanillin, alpha-ionone, sweet orange oil and silicon dioxide.

6. A preparation method of the dairy cow pellet feed comprises the following steps:

crushing the granular raw material;

preparing powdery raw materials, including 33% to 40% of wheat flour, 0.8% to 5% of premix and 3% to 6% of bentonite;

mixing the crushed granular raw materials with the powdery raw materials;

7. The method for preparing the dairy cow pellet feed as claimed in claim 6, wherein the raw materials by weight ratio are: 34.95% of corn; 17.77% of soybean meal; rapeseed meal, accounting for 5.99 percent; wheat flour, accounting for 35.95 percent; 0.75 percent of premix; 4.59 percent of bentonite, wherein the premix is a trace element ingredient, and the trace element ingredient comprises trace mineral elements, vitamins and antioxidants.

8. The method for preparing the dairy cow pellet feed as claimed in claim 6, wherein the raw materials by weight ratio are: 32% of corn; bean pulp, accounting for 18 percent; 5% of rapeseed meal; wheat flour, accounting for 35 percent; 5% of premix; the bentonite accounts for 5%, the premix comprises 4% of ulva powder and 1% of trace element ingredients, and the trace element ingredients comprise trace mineral elements, vitamins and synthetic amino acids.

9. The method for preparing a dairy cow pellet feed as claimed in claim 6, wherein the premix comprises: one or more of natural edible spice extract, ethyl vanillin, alpha-ionone, sweet orange oil and silicon dioxide.

10. The method for preparing the dairy cow pellet feed as claimed in claim 6, wherein the raw materials by weight ratio are: corn, accounting for 45 percent; 20% of soybean meal; rapeseed meal accounting for 4 percent; wheat flour 23%; 4% of premix; the bentonite accounts for 4%, the premix comprises 3.25% of ulva pertusa powder and 0.75% of trace element ingredients, and the trace element ingredients comprise trace mineral elements, vitamins and synthetic amino acids.