Complete grass pellet feed as well as preparation method and application thereof

Abstract

The invention relates to the field of feed, in particular to complete grass pellet feed as well as a preparation method and application thereof. The complete grass pellet feed comprises a coarse feed and a concentrate supplement feed, and by improving the addition amount of the coarse feed and the length of the coarse feed, physical effective NDF is increased, rumination is promoted, and acidosis is reduced; the phenomenon of picky feeding of animals is effectively reduced, nutrition intake is more balanced and accurate, and growth and development are promoted; transportation and storage are more convenient, feeding is easy, and cost is reduced.

Description

Technical Field

[0001] The invention belongs to the field of feed, and in particular relates to a complete grass pellet feed and a preparation method and application thereof. Background Art

[0002] With the continuous improvement of people's living standards and the continuous change of dietary structure, the demand for high-quality livestock products has continued to increase, and my country's animal husbandry has developed rapidly. The rapid development of the mutton sheep industry has also led to a shortage of conventional feeds, and the high cost of feeds, which usually accounts for 60% to 70% of the total cost of mutton sheep breeding. Therefore, the development and utilization of unconventional roughage is particularly important. The large amount of by-products produced in the production of planting can provide a rich source of roughage for mutton sheep production. The use of roughage according to local conditions is of great significance to the development of the mutton sheep industry.

[0003] In recent years, total mixed ration (TMR) technology has been widely used in sheep production, and has played a positive role in the utilization of roughage resources in my country. TMR feeding can make the utilization of protein and carbohydrates in food in the rumen tend to be synchronized, stabilize the pH of rumen fluid, be conducive to microbial growth, improve rumen function, and thus improve feed return. However, without good feeding management, there will still be problems such as uneven mixing of fine and roughage, picky eating, and large differences in particle size, and it cannot effectively improve the conversion efficiency of low-quality roughage. At the same time, TMR should maintain a moisture content of 45% to 55%. Too low a moisture content will lead to the separation of fine and roughage, and animals are prone to picky eating. Too high a moisture content will affect the dry matter intake (DMI) of animals. Too high a moisture content can easily lead to mildew, making TMR inconvenient to store, resulting in waste.

[0004] With the advancement of science, pelletized TMR has developed rapidly in my country. Pelleted TMR can utilize local agricultural and sideline products and improve the development and utilization of roughage resources. In large-scale feed production, pelleted feed is easy to store, and can reduce feed waste during feeding and reduce environmental pollution such as dust. Pelleted feed has the advantages of good palatability, high animal feed intake, and easy transportation.

[0005] However, the pelleting technology and equipment for pelletized TMR feed are not mature at present; first, the particle size of the existing pelletized TMR feed roughage raw materials is too small, which is not conducive to animal rumination, and it is easy to cause rumen papilla wear and reduce feed utilization; second, the amount of roughage added is too high, the pelleting effect is poor, and the hardness is low; third, the existing pelleting process equipment cannot meet the length and amount of roughage required to promote animal rumination. Therefore, according to the nutritional comprehensiveness and functionality of pelletized TMR, a pelletizer is designed to meet the nutritional needs of animals, as well as the roughage intake and roughage crushing length required for rumen fermentation and rumination. Summary of the invention

[0006] Therefore, the present invention develops a complete grass pellet feed, which is used in the breeding of cattle, sheep, etc., and increases the physically effective NDF, promotes rumination, and reduces acidosis by improving the addition amount of the existing granulated TMR roughage and the length of the roughage; effectively reduces the phenomenon of animal picky eating, and the nutritional intake is more balanced and accurate, which promotes growth and development; transportation and storage are more convenient, feeding is simple, and costs are reduced.

[0007] The technical solution of the present invention is as follows:

[0008] A complete grass pellet feed comprises roughage and concentrated supplementary feed.

[0009] The straw sources in my country are as follows: 28.4% rice, 21.45% wheat, 31.45% corn, 2.97% peanuts, 3.4% rapeseed, 0.12% sesame, 0.06% fiber crops, 0.67% beetroot, 0.84% ​​sugarcane, etc. Peanut seedlings, corn stalks, wheat straw, rice straw resources, etc. account for a large proportion of crop resources. Preferably, the roughage is derived from any one or more of peanut seedlings, peanut shells, corn stalks, wheat straw, rice straw, rice husks, etc.

[0010] Preferably, the roughage is selected from a mixture of peanut vines, peanut shells and rice husk powder. Further, the weight ratio of peanut vines to peanut shells and rice husk powder is 30-50:4-30:4-10, which can be specifically configured according to different livestock species, ages and production performance.

[0011] Preferably, the length of the roughage is in the range of 1-3 cm; when the length of the roughage is 1.5 cm, the production efficiency is increased by 15.38% compared with the length of the roughage of 3 cm; and compared with the length of the roughage of 1 cm, the rumination time of the Australian sheep can be significantly increased. Therefore, the preferred length of the roughage is 1.5 cm.

[0012] Preferably, the amount of roughage added is not less than 30%; the ratio of fine to roughage in the feed is 50-70:50-30, preferably 50:50, 60:40, 70:30. When the amount of roughage added is 50%, the pelleting effect is best.

[0013] Preferably, the concentrate supplementary feed includes corn, sprayed corn husk, 43% soybean meal, wheat bran, Danlibao, vitality VC, baking soda, de-mold agent, vitamins and trace element mixture, wherein the content of each component (by weight) is 20-50 parts of corn, 3-5 parts of sprayed corn husk, 3-7 parts of 43% soybean meal, 5-7 parts of wheat bran, 0.1-0.4 parts of non-protein nitrogen (can be purchased, such as Danlibao), 0.1-0.2 parts of vitality VC, 1-2 parts of baking soda, 0.04-0.06 parts of de-mold agent, and 4-6 parts of vitamin and trace element mixture. The vitamin and trace element mixture mainly provides vitamins and trace elements, and can be specifically commercially available, such as 5% fattening sheep compound premix that can be purchased from the applicant himself for external sales.

[0014] As a preference, 4-6 parts of the compound premix for fattening sheep are added, and the preferred addition amount is 5 parts. Specifically, concentrates with different proteins, energies and other nutrients can be prepared for different livestock species, ages and production performances.

[0015] The preparation method of the complete grass pellet feed is as follows:

[0016] (1) Roughage preparation: Based on the nutritional characteristics of ruminants and process requirements, the roughage is crushed into 1-3 cm length required by the diet;

[0017] (2) Preparation of concentrate supplements: Prepare concentrates with different protein, energy and other nutritional components according to different livestock species, ages and production performance;

[0018] (3) Mixing: adding (1) and (2) into a mixer according to a certain fine-to-coarse ratio and mixing them uniformly;

[0019] (4) Modulation: According to the process requirements and the actual moisture content of the materials, a certain amount of moisture required for molding is added to control the moisture content of the diet within the range of 15-20%;

[0020] (5) Granulation: granulation of feed to obtain full-value grass granules;

[0021] (6) Drying and cooling: drying and cooling the full-value grass particles obtained in (5);

[0022] (7) Packing and storage.

[0023] Preferably, the mixing time in step (3) is 60-120 s, preferably 90 s.

[0024] Preferably, the modulation temperature of step (4) is 60-80°C, preferably 70°C; the modulation time is 20-40s, preferably 30s.

[0025] Preferably, the granulation conditions in step (5) are: the ring membrane diameter is 6 mm, the ring membrane ratio is 10:1-6:1, and the pressure is 0.7-0.8 kPa.

[0026] Preferably, the drying time in step (6) is 3-6 minutes, and the moisture content is controlled to be less than 14%.

[0027] Preferably, in step (7), the packaging bags are matched according to the diet formula, and the packaging is completed for storage, and the net weight of each bag of diet is 50kg±0.5kg

[0028] The complete grass pellet feed is used for the breeding of cattle, sheep, etc., preferably for the breeding of dairy cows and goats, especially for the breeding of meat sheep.

[0029] The beneficial effects of the present invention are as follows:

[0030] In my country, there are a large number of straw roughages, many types, and a wide distribution. However, the comprehensive utilization cost of straw is high, the economic efficiency is poor, and the industrialization level is low, resulting in regional, seasonal, and structural straw surpluses, resulting in resource waste and environmental pollution. Different straws have different nutritional values, and some have single nutritional values, poor palatability, and low utilization rates. Traditional powdered fully mixed TMR diets have high requirements for feeding and management, and are prone to uneven mixing of fine and roughage, picky eating, etc., resulting in unbalanced nutritional intake and reduced production efficiency; and powdered fully mixed TMR diets have high moisture content and are difficult to store, which can easily cause feed quality changes and waste resources. The existing pelletized TMR feed roughage raw materials have too small a particle size, which is not conducive to animal rumination, and can easily cause rumen papilla wear and reduce feed utilization; the amount of roughage added is too high, the pelleting effect is poor, and the hardness is low.

[0031] The present invention makes full use of the resource of crop straw, reduces the excessive dependence of animal husbandry on grain, determines the type, addition amount and length of the most suitable roughage in the full-price grass pellets, is conducive to the decomposition of cellulose, improves the utilization rate of nutrients, reduces the amount of concentrated feed, and reduces the feeding cost. It enables ruminant livestock to obtain nutrition from low-quality roughage, and promotes the utilization of low-quality roughage. The full-price grass pellet feed of the present invention is easy to store, convenient to transport, and has the effect of reducing the cost of feeding and management. It also ensures nutritional balance and improves the palatability of feed, thereby increasing the feed intake, improving production performance, and also improving the utilization of straw feed, reducing resource waste. Compared with the traditional powdered fully mixed TMR diet, feeding full-price grass pellets can significantly increase the daily weight gain, daily feed intake, and final weight of Australian cold sheep, which can be increased by 37.50%, 10.10%, and 8.60% respectively; it has no significant effect on the feed-to-meat ratio, but can numerically reduce the feed-to-meat ratio by 2%, reduce the amount of concentrated feed supplement by 20%, and reduce the cost by 38.41%.

[0032] The feed production line of the present invention realizes computer control, automatic batching and automated production, and improves production efficiency, which can reach 6-8t / h. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 These are pictures of particle morphology under different fine-coarse ratios. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] The feed in the embodiment of the present invention: the raw materials peanut vines, corn stalks, wheat stalks, rice straw, corn, etc. are all provided by Guangxi Aodu Feed Factory, and the crushing and granulation are also provided by Guangxi Aodu Feed Factory.

[0036] Before the experiment, the sheep houses were uniformly disinfected, the experimental animals were uniformly dewormed, raised in groups, and had free access to water. They were fed once a day at 8:00 and 17:00. The feeding time lasted for 1.5 hours. During the experiment, the feeding methods, management modes and environmental conditions of each group were the same. The experimental animals were fed at 1.2 times the maintenance requirement, and the feed was prepared in accordance with the "Animal Nutrition Parameters and Feeding Standards" (2010).

[0037] The specific process flow of complete grass pellet feed production is as follows:

[0038] (1) Straw processing: Based on the nutritional characteristics of ruminants and process requirements, straw and other roughage are crushed into 1-3 cm length required by the daily diet;

[0039] (2) Preparation of concentrate supplement: according to different livestock species, ages and production performance, different concentrates with different protein, energy and other nutritional components are prepared according to different concentrate-to-roughage ratios of 50:50, 60:40 and 70:30;

[0040] (3) Mixing: Add (1) and (2) into a mixer according to the formula ratio of the full-price grass granules and stir for 90 seconds;

[0041] (4) Modulation: According to the process requirements and the actual moisture content of the materials, a certain amount of water required for molding is added to make the moisture content of the diet about 15-20%. The modulation temperature is 60-80°C and the modulation time is 30s.

[0042] (5) Granulation: The ring membrane diameter is 6 mm, the ring membrane ratio is 10:1-6:1, the pressure is 0.7-0.8 kPa, and the feed amount varies according to the ratio of fine to coarse in the formula;

[0043] (6) Drying and cooling: Dry and cool the whole grass pellets for 5 minutes to ensure that the moisture content is below 14%;

[0044] (7) Packaging and storage: Match the packaging bags according to the diet formula and complete the packaging and storage. The net weight of each bag of diet is 50kg±0.5kg.

[0045] In the embodiment of the present invention, mid-stage fattening Australian cold-blooded sheep are selected, and the test groups are determined according to product requirements. The feeds of each group are prepared according to the principle of equal energy and equal nitrogen, and are processed according to the process flow of making complete grass particles in the present invention.

[0046] The test indicators and test methods of the present invention are as follows:

[0047] (1) Determination of physical indicators of full-value grass particles

[0048] The pellet forming rate, hardness, bulk density and production efficiency of complete grass pellet feed were evaluated.

[0049] Forming rate (%): the ratio of the material on the sieve to the total weight of the sample after a certain sample is formed and graded once per unit time or per unit mass. Take about 300g of granular sample at the discharge port of the granulator, cool it naturally to no more than 5℃ above the ambient temperature, and sieve it with a mesh diameter (or side length) of about 0.8 times the diameter of the granular sample, then weigh the mass of the material retained on the sieve to calculate the granular forming rate.

[0050] Hardness (kg): Randomly select 20 feeds of uniform length, use a hardness tester to test the hardness of the pellet feeds and record the results. Calculate the average hardness of the pellet feed products (excluding the maximum and minimum values) and express it in N or kg.

[0051] Bulk density (g / L): Mix the complete grass pellet feed carefully and put it into a bulk density device. Pour out the sample in the device and weigh it. Repeat the measurement three times for each sample and use the average value as the bulk density.

[0052] Production efficiency (t / h): the amount of full-price grass particles produced per hour.

[0053] (2) Production performance measurement

[0054] During the trial period, the leftover feed of each group was collected, weighed and recorded, and the actual feed intake of each group and each pen of the test sheep was calculated, and the average daily feed intake was calculated. The feed-to-meat ratio and average daily weight gain of the mutton sheep were calculated based on the changes in feed intake and body weight. The calculation formula is as follows:

[0055] Average daily feed intake = total feed intake / number of experimental days

[0056] Average daily gain = total gain / number of experimental days

[0057] Feed conversion ratio = average daily feed intake / average daily gain

[0058] (3) Determination of feed conversion ratio

[0059] During the formal test period, carefully observe and record, and calculate the feed conversion ratio of each group of experimental sheep. The calculation formula is as follows:

[0060] Feed conversion ratio = average daily feed intake of Australian Cold Sheep / average daily gain of Australian Cold Sheep

[0061] (4) Determination of rumen fluid pH

[0062] Collect rumen fluid every 3 h (0, 3, 6, 9) after feeding, filter it, and measure it with a handheld pH meter.

[0063] (5) Determination of rumen NH3-N concentration

[0064] Centrifuge the rumen fluid at 3000 r / min for 15 min, inject 1 ml of the supernatant into a 1.5 ml microcentrifuge tube, and then store it frozen in a -20°C refrigerator. The determination of NH3-N concentration is based on the method of Chaney et al. (1962), and the absorbance is measured at 630 nm using a UV-spectrophotometer and then calculated.

[0065] (6) Statistical analysis of experimental data

[0066] Use Excel software to organize the data, and use ANOVA test of SAS 9.2 software for data analysis. Take P < 0.05 as the judgment standard for significant difference, P < 0.01 as the judgment standard for extremely significant difference, and 0.05 < P < 0.1 as the judgment standard for approaching significance.

[0067] The specific embodiments of the present invention are as follows:

[0068] Example 1 (Effect of different roughages on physical indexes of full-price grass pellets)

[0069] According to the formulation in Table 1, prepare full-price grass pellets with a concentrate-to-roughage ratio of 70:30, and study the effect of different types of roughages on the physical indexes of full-price grass pellets. Among them, Group A is peanut vine, Group B is corn straw, Group C is wheat straw, and Group D is rice straw. The specific experimental diet composition is as follows:

[0070] Table 1. Diet composition of full-price pellet feed with different roughages (unit: %)

[0071]

[0072] Among them, the specific dosage of 5% fattening sheep compound premix is ​​calculated in tons as follows:

[0073] Raw material name Addition amount (Kg / ton) VA500 0.45 Vitamin D3-500 0.12 Vitamin E powder 2.00 Cobalt-rich 50 0.18 Copper sulfate pentahydrate (copper powder) 0.88 Iodine 50 0.32 Ferrous Sulfate Monohydrate 4.00 Manganese sulfate monohydrate 3.50 Selenium 50 0.16 Low chloride zinc sulfate monohydrate 4.20 Anhydrous sodium sulfate 16.00 Santoquin 1.00 Sweetener (SDT3 2.00 Feed flavoring agent (Jiamei 2012) 1.00 Stone powder 699.19 Rice Husk Powder 65.00 Sodium chloride 200.00

[0074] The effects of different roughages on the physical indices of complete grass pellets were studied. The physical indices of complete grass pellets of groups A, B, C, and D were measured. The results are shown in Table 2:

[0075] Table 2. Effects of different roughages on the physical parameters of complete grass pellets

[0076]

[0077] Note: Data in the same row without letters or with the same letters indicate no significant difference (P>0.05), while data with different letters indicate significant difference (P<0.05), the same below.

[0078] From Table 2, it can be seen that when the ratio of concentrate to roughage is 70:30, the process parameters are ring film diameter 6mm, ring film ratio 10:1-6:1, pressure 0.7-0.8kpa, modulation temperature 60-80℃, and the optimal moisture content is about 15%-23%. The type of roughage can significantly affect the physical indicators of full-price grass particles. The hardness and bulk density of the roughage peanut seedlings are significantly higher than corn straw, higher than rice straw, and higher than wheat straw. The forming rate and production efficiency of peanut seedlings are significantly higher than rice straw, higher than wheat straw, but there is no significant effect with corn straw.

[0079] Example 2 (Effect of the fine-to-coarse ratio of whole grass pellets on the physical indicators of the pellets)

[0080] 150 Australian-Han sheep weighing 30.31±3.23kg were selected and divided into 3 groups. The concentrate-to-roughage ratio of feed was 50:50, 60:40, and 70:30 respectively. The appearance of pellet feed was as shown in the attached figure. Figure 1 Feed for 3 months. Record the daily feed intake and weigh it before and after the experiment. The specific experimental diet composition is shown in Table 3:

[0081] Table 3. Composition of diets with different concentrate-to-roughage ratios of complete grass pellets

[0082]

[0083] The effect of the ratio of fine to coarse of full-price grass pellets on the physical indicators of pellets was studied, as shown in Table 4:

[0084] Table 4. Effect of the ratio of concentrate to coarseness of full-price grass pellets on the physical parameters of pellets

[0085]

[0086] Note: Data in the same row without letters or with the same letters indicate no significant difference (P>0.05), while data with different letters indicate significant difference (P<0.05).

[0087] Table 5. Effects of different concentrate to roughage ratios on growth performance of Australian cold-blooded sheep during fattening period

[0088]

[0089] Note: Data in the same row without letters or with the same letters indicate no significant difference (P>0.05), while data with different letters indicate significant difference (P<0.05).

[0090] It can be seen from Table 4 that with the increase of roughage in the diet, the sensory quality of the feed increased, the pellet forming rate of complete grass increased significantly, the bulk density decreased significantly, and there was no significant effect on production efficiency.

[0091] As shown in Table 5, different concentrate-to-roughage ratios of complete grass pellets have a significant effect on the growth performance of Australian cold sheep during the fattening period. With the increase of concentrate feed, the daily weight gain and body weight of Australian cold sheep both showed a significant increase, while the feed-to-meat ratio was just the opposite, showing a significant downward trend; and there was no significant effect on feed intake. Therefore, when the concentrate-to-roughage ratio of complete grass pellets is 70:30, the growth performance of Australian cold sheep can be significantly improved.

[0092] Example 3 (Effect of Roughage Length on Growth Performance of Australian Cold Sheep during Fattening Period)

[0093] As shown in Table 6, the length of roughage in full-price grass pellets has a significant effect on pellet production efficiency and the production performance of Australian cold-blooded sheep. As the length of roughage increases, the production efficiency of full-price grass pellets decreases significantly. The final weight, daily weight gain and feed intake of the 1.5cm group are significantly higher than those of the 3cm group, but there is no significant difference with the 1cm and 2cm groups. There is no significant effect on the feed-to-meat ratio, but the numerical value of the 1.5cm group is 4.27%, 3.07% and 13.18% lower than that of the 1cm, 2cm and 3cm groups, respectively.

[0094] Table 6 Effect of roughage length on growth performance of Australian cold-blooded sheep during fattening period

[0095]

[0096] Note: Data in the same row without letters or with the same letters indicate no significant difference (P>0.05), while data with different letters indicate significant difference (P<0.05), the same below.

[0097] As shown in Table 7, the length of roughage can significantly affect the pH value of rumen fluid and the concentration of NH3-N in the rumen. The pH3 and pH6 of rumen fluid increase with the increase of the length of roughage, while the concentration of NH3-N 3 and NH3-N 6 decrease with the increase of the length of roughage. There is no significant difference in the pH9 and NH3-N concentration 9 of rumen fluid. In summary, when the length of roughage is 1 cm, the pH value of rumen fluid decreases rapidly, and long-term feeding is likely to cause rumen acidosis, reduce feed utilization and growth performance.

[0098] Table 7 Effect of roughage length on rumen pH and NH3-N concentration in Australian sheep

[0099]

[0100] Example 4 (Effect of powdered feed mixed with TMR and full-value grass pellets on the growth performance of Australian cold-blooded sheep in fattening period)

[0101] 100 Australian cold fattening sheep, weighing about 25kg, were selected and divided into two groups, a control group and an experimental group, each with 50 sheep; the control group was fed a TMR mixed diet, and the experimental group was fed a complete grass pellet (roughage length was 1.5cm). The experiment was carried out for 2 months, and the daily feed intake was recorded and weighed once every 2 weeks. The composition of the experimental diet is shown in Table 8:

[0102] Table 8. Composition of the experimental diet for Australian cold-blooded sheep during the fattening period

[0103]

[0104] The traditional powdered fully mixed TMR and the complete grass pellets of the present invention were used for feeding comparison to study the effects on the growth performance of Australian sheep in the fattening period, wherein the traditional powdered fully mixed TMR was provided by Guangxi Aodu Sheep Farm and prepared using a TMR feed mixer. The results are shown in Table 9:

[0105] Table 9. Effects of powdered feed mixed with TMR and complete grass pellets on the growth performance of Australian cold-blooded sheep during fattening period

[0106]

[0107] Note: Data in the same column without letters or with the same letters indicate no significant difference (P>0.05), and data with different letters indicate significant difference (P<0.05).

[0108] It can be seen from Table 9 that compared with the traditional powdered fully mixed TMR diet, feeding complete grass pellets can significantly increase the daily weight gain, daily feed intake, and final body weight of Australian cold-blooded sheep by 37.50%, 10.10%, and 8.60%, respectively; significantly reduce the meat-to-money ratio by 11.60%, have no significant effect on the feed-to-meat ratio, but numerically reduce the feed-to-meat ratio by 2%.

[0109] In summary, different roughages have no significant effect on the physical quality of complete pellets, but different concentrate-to-roughage ratios have significant effects on the physical properties of pellets, such as hardness, bulk density, and forming rate. As the amount of concentrate increases, the sensory quality of complete pellets decreases, but feed utilization increases and rumination time increases. Compared with traditional powdered fully mixed TMR diets, feeding complete grass pellets results in more precise nutritional intake, less picky eating, faster growth, and higher economic value.

[0110] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A complete grass pellet feed, characterized in that: Including roughage, concentrate supplementary feed; The roughage is derived from any one or more of peanut vines, peanut shells, corn stalks, wheat stalks, rice straws, and rice husks; the length of the roughage is in the range of 1-3 cm.

2. The feed according to claim 1, characterized in that: The length of the roughage is 1.5 cm.

3. The feed according to claim 1, characterized in that: The roughage is selected from a mixture of peanut vines, peanut shells and rice husk powder, and preferably the weight ratio of peanut vines, peanut shells and rice husk powder is 30-50:4-30:4-10.

4. The feed according to claim 1, characterized in that: The amount of roughage added is not less than 30%; the ratio of concentrate to roughage in the feed is 50-70:50-30, preferably 50:50, 60:40, 70:30, and more preferably 50:

50.

5. The feed according to claim 1, characterized in that: The concentrate supplementary feed comprises corn, sprayed corn husks, 43% soybean meal, wheat bran, non-protein nitrogen, vital VC, baking soda, a mildew remover, a mixture of vitamins and trace elements, wherein the content of each component (in parts by weight) is 20-50 parts of corn, 3-5 parts of sprayed corn husks, 3-7 parts of 43% soybean meal, 5-7 parts of wheat bran, 0.1-0.4 parts of non-protein nitrogen, 0.1-0.2 parts of vital VC, 1-2 parts of baking soda, 0.04-0.06 parts of a mildew remover, and 4-6 parts of a mixture of vitamins and trace elements.

6. A method for preparing the complete grass pellet feed according to any one of claims 1 to 5, characterized in that: The steps include: (1) Roughage preparation: Crush the roughage into 1-3 cm length as required by the diet; (2) Preparation of concentrate supplementary feed: Prepare concentrate feed with different protein, energy and other nutritional components according to different livestock species, age and production performance; (3) Mixing: adding the roughage and concentrate supplementary feed from steps (1) and (2) into a mixer according to a certain concentrate-to-roughage ratio and mixing them evenly; (4) Conditioning: Add water required for molding to control the moisture content of the diet within the range of 15-20%; (5) Granulation: Granulate the feed to obtain full-value grass pellets; (6) Drying and cooling: drying and cooling the full-price grass particles obtained in (5); (7) Packing and storage.

7. The preparation method according to claim 6, characterized in that: The mixing time of step (3) is 60-120 s, preferably 90 s; the modulation temperature of step (4) is 60-80° C., preferably 70° C.; and the modulation time is 20-40 s, preferably 30 s.

8. The preparation method according to claim 6, characterized in that: The granulation conditions of step (5) are: ring membrane diameter of 6 mm, ring membrane ratio of 10:1-6:1, and pressure of 0.7-0.8 kPa.

9. The preparation method according to claim 6, characterized in that: In step (6), the drying time is 3-6 minutes, and the moisture content is controlled to be less than 14%. In step (7), the packaging bags are matched according to the diet formula, and the packaging is completed for storage, and the net weight of each bag of diet is 50 kg ± 0.5 kg.

10. The complete grass pellet feed prepared by the preparation method according to any one of claims 6 to 9 is used for raising cattle, sheep, etc., preferably for raising dairy cows and goats, especially for raising meat sheep.

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