Rumen bypass slow-release feed additive and preparation method thereof

Abstract

The invention relates to a rumen bypass slow-release feed additive and a preparation method thereof, and belongs to the field of livestock feeds, and the rumen bypass slow-release feed additive comprises the following substances in parts by weight: 60-70 parts of a feed additive, 27-35 parts of fat powder and 3-5 parts of fatty acid calcium. The rumen bypass slow-release feed additive can be produced at a lower temperature by adding the feed additive into the ethanol solution of the fat powder and the fatty acid calcium, so that the thermal decomposition condition of the temperature-sensitive feed additive caused by overhigh temperature in the operation process is avoided to the greatest extent; therefore, the subsequent using effect is effectively ensured, and meanwhile energy is effectively saved. Although the content of the feed additive is relatively high, the feed additive can be uniformly coated while relatively few coating materials (fatty powder and fatty acid calcium) are used by the preparation method disclosed by the invention, so that the coating rate of the feed additive is increased while the coating materials are effectively saved.

Description

Technical Field

[0001] The present invention belongs to the field of livestock feed, and specifically relates to a rumen bypass slow-release feed additive and a preparation method thereof. Background Art

[0002] The rumen is a unique digestive organ of ruminants (such as cows and sheep). A rumen bypass slow-release feed additive is a specially treated feed additive designed to improve its utilization rate in the digestive system of ruminants. The rumen bypass feed is treated by physical or chemical methods to reduce its fermentation and degradation in the rumen, so that more of it enters the abomasum and small intestine for digestion and absorption.

[0003] Current rumen bypass slow-release feed additives form a slow-release coating layer on the surface of the feed additive by spraying and rolling methods during the production process, so as to achieve the effect of rumen bypass slow-release absorption. However, due to the relatively large amount of coating material added in the current process operation to ensure the slow-release effect, the content of the feed additive is less than 50%. Moreover, the existing process also has the problem of uneven coating, resulting in a finished product rate of less than 85%. In addition, the operating environment in the existing operation is generally too high, which will cause thermal decomposition of thermosensitive substances such as amino acids, antibacterial peptides, and bioactive enzyme preparations during the production process, thus affecting the subsequent use effect. At the same time, using a large amount of coating material for operation requires maintaining a relatively high operating temperature for a long time, which also consumes a lot of energy. Summary of the Invention

[0004] The present invention provides a rumen bypass slow-release feed additive and a preparation method thereof to solve the defects in the prior art.

[0005] The present invention is achieved through the following technical solutions:

[0006] A rumen bypass slow-release feed additive, comprising the following substances in parts by weight: 60 - 70 parts of feed additive, 27 - 35 parts of fat powder, and 3 - 5 parts of fatty acid calcium.

[0007] For the rumen bypass slow-release feed additive as described above, the feed additive is any one of lysine, methionine, threonine, glutamic acid, and glycine.

[0008] For the rumen bypass slow-release feed additive as described above, the fat powder is any one of stearic acid fat powder and palmitic acid fat powder, or a mixture of the two in any proportion.

[0009] For the rumen bypass slow-release feed additive as described above, the fatty acid calcium is any one of calcium laurate, calcium myristate, calcium palmitate, and calcium stearate, or a mixture of any two or more of them in any proportion.

[0010] A preparation method of a rumen bypass slow-release feed additive comprises the following steps:

[0011] Step 1: Weigh the feed additive, fat powder and calcium fatty acid according to the ratio, crush them respectively and reserve for later use;

[0012] Step 2: Heat ethanol and add the fat powder and calcium fatty acid, then stir until completely dissolved;

[0013] Step 3: Add the crushed feed additive into the ethanol solution obtained in Step 2 and form a suspension under stirring;

[0014] Step 4: Remove the ethanol solvent from the suspension obtained in Step 3 by spray drying to obtain the rumen bypass slow-release feed additive.

[0015] For the preparation method of a rumen bypass slow-release feed additive as described above, in Step 1, after weighing, the feed additive, fat powder and calcium fatty acid are respectively crushed and sieved through a 200-mesh sieve for reserve. If there are particles that do not pass through the sieve, they are continuously crushed until all pass through the sieve.

[0016] For the preparation method of a rumen bypass slow-release feed additive as described above, in Step 2, ethanol is heated to 40 - 50 °C and then the fat powder and calcium fatty acid are added and stirred at a rotation speed of 400 - 600 r / min until the fat powder and calcium fatty acid are completely dissolved; the usage amount of ethanol is 6 - 8 times the total mass of the fat powder and calcium fatty acid.

[0017] For the preparation method of a rumen bypass slow-release feed additive as described above, in Step 3, the feed additive is divided into 8 - 10 batches for addition, the temperature of the ethanol solution is maintained at 40 - 50 °C, the stirring rotation speed is 2200 - 2800 r / min, and after each batch of feed additive is added, it is stirred for 6 - 8 min and then the next batch of feed additive is added until all are added.

[0018] For the preparation method of a rumen bypass slow-release feed additive as described above, in Step 3, 0.5 - 1% of lecithin based on the mass of the feed additive can be added to the ethanol solvent to improve the stability of the suspension.

[0019] For the preparation method of a rumen bypass slow-release feed additive as described above, the inlet temperature of the spray drying is 60 - 70 °C, and the outlet temperature of the spray drying is 40 - 50 °C.

[0020] The advantages of the present invention are:

[0021] The present invention can produce a rumen bypass slow-release feed additive at a relatively low temperature by adding a feed additive to an ethanol solution of fat powder and calcium fatty acid, thereby avoiding the thermal decomposition of temperature-sensitive feed additives caused by excessive temperature during the operation to the greatest extent, effectively ensuring the subsequent use effect, and at the same time effectively saving energy.

[0022] Although the content of the feed additive is relatively large in the present invention, the preparation method of the present invention can evenly coat the feed additive while using less coating materials (fat powder and calcium fatty acid), thereby effectively saving the coating materials and improving the coating rate of the feed additive. Specific Embodiments

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0024] Example 1

[0025] Step 1: Weigh 60 parts of glycine, 27 parts of stearic acid fat powder, and 3 parts of calcium stearate according to the ratio, and crush them through a 200-mesh sieve for standby. If there are particles that have not passed through the sieve, continue to crush them until all pass through the sieve and then set aside.

[0026] Step 2: Heat the ethanol to 40°C and add the fat powder and calcium fatty acid, and stir at a rotation speed of 600 r / min until the fat powder and calcium fatty acid are completely dissolved; the amount of ethanol used is 8 times the total mass of the fat powder and calcium fatty acid.

[0027] Step 3: Divide the crushed feed additive into 8 batches and add them. Keep the temperature of the ethanol solution at 40°C and the stirring speed at 2200 r / min. After adding each batch of feed additive, stir for 8 min and then add the next batch of feed additive until all are added. When adding the third batch of feed additive, add 0.5% of lecithin by mass of the feed additive at the same time to finally form a suspension.

[0028] Step 4: Remove the ethanol solvent from the suspension obtained in Step 3 by spray drying (the inlet temperature of spray drying is 60°C, and the outlet temperature of spray drying is 40°C) to obtain a rumen bypass slow-release feed additive.

[0029] Example 2

[0030] Step 1: Weigh 70 parts of glutamic acid, 35 parts of palmitic acid fat powder, 1 part of calcium laurate, 1 part of calcium myristate, and 3 parts of calcium stearate according to the ratio. Crush them separately and sieve through a 200-mesh sieve for standby. If there are particles that have not passed through the sieve, continue to crush them until all pass through the sieve and then set aside.

[0031] Step 2: Heat ethanol to 50°C and then add the fat powder and fatty acid calcium. Stir at a speed of 400 r / min until the fat powder and fatty acid calcium are completely dissolved. The amount of ethanol used is 6 times the total mass of the fat powder and fatty acid calcium.

[0032] Step 3: Divide the crushed feed additive into 10 batches for addition. Keep the temperature of the ethanol solution at 50°C and the stirring speed at 2800 r / min. After adding each batch of feed additive, stir for 6 min and then add the next batch until all are added. When adding the third batch of feed additive, add lecithin with a mass of 1% of the feed additive mass at the same time to finally form a suspension.

[0033] Step 4: Remove the ethanol solvent from the suspension obtained in Step 3 by spray drying (the inlet temperature of spray drying is 70°C and the outlet temperature is 50°C) to obtain the rumen bypass slow-release feed additive.

[0034] Example 3

[0035] Step 1: Weigh 64 parts of threonine, 5 parts of stearic acid fat powder, 26 parts of palmitic acid fat powder, 0.5 part of calcium laurate, 1.5 parts of calcium myristate, 1 part of calcium palmitate, and 0.5 part of calcium stearate according to the ratio. Crush them separately and sieve through a 200-mesh sieve for standby. If there are particles that have not passed through the sieve, continue to crush them until all pass through the sieve and then set aside.

[0036] Step 2: Heat ethanol to 46°C and then add the fat powder and fatty acid calcium. Stir at a speed of 500 r / min until the fat powder and fatty acid calcium are completely dissolved. The amount of ethanol used is 7.3 times the total mass of the fat powder and fatty acid calcium.

[0037] Step 3: Divide the crushed feed additive into 9 batches for addition. Keep the temperature of the ethanol solution at 46°C and the stirring speed at 2600 r / min. After adding each batch of feed additive, stir for 7.2 min and then add the next batch until all are added. When adding the third batch of feed additive, add lecithin with a mass of 0.9% of the feed additive mass at the same time to finally form a suspension.

[0038] Step 4: Remove the ethanol solvent from the suspension obtained in Step 3 by spray drying (the inlet temperature of spray drying is 67°C and the outlet temperature is 48°C) to obtain the rumen bypass slow-release feed additive.

[0039] Example 4

[0040] Step 1: Weigh 63 parts of methionine, 18 parts of stearic acid fat powder, 14 parts of palmitic acid fat powder, and 3.7 parts of calcium palmitate according to the ratio. Crush them separately and sieve them through a 200-mesh sieve for standby. If there are particles that have not passed through the sieve, continue to crush them until all pass through the sieve and then set aside;

[0041] Step 2: Heat ethanol to 43°C, then add the fat powder and fatty acid calcium, and stir at a rotation speed of 480 r / min until the fat powder and fatty acid calcium are completely dissolved; the amount of ethanol used is 6.7 times the total mass of the fat powder and fatty acid calcium;

[0042] Step 3: Divide the crushed feed additive into 8 batches and add them. Keep the temperature of the ethanol solution at 43°C and the stirring speed at 2300 r / min. After adding each batch of feed additive, stir for 6.7 min and then add the next batch of feed additive until all are added. When adding the third batch of feed additive, add 0.6% of the lecithin by mass of the feed additive at the same time, and finally form a suspension;

[0043] Step 4: Remove the ethanol solvent from the suspension obtained in Step 3 by spray drying (the inlet temperature of spray drying is 63°C and the outlet temperature is 45°C) to obtain the rumen bypass slow-release feed additive.

[0044] Example 5

[0045] Step 1: Weigh 65 parts of lysine, 15 parts of stearic acid fat powder, 16 parts of palmitic acid fat powder, 2 parts of calcium palmitate, and 2 parts of calcium stearate according to the ratio. Crush them separately and sieve them through a 200-mesh sieve for standby. If there are particles that have not passed through the sieve, continue to crush them until all pass through the sieve and then set aside;

[0046] Step 2: Heat ethanol to 45°C, then add the fat powder and fatty acid calcium, and stir at a rotation speed of 500 r / min until the fat powder and fatty acid calcium are completely dissolved; the amount of ethanol used is 7 times the total mass of the fat powder and fatty acid calcium;

[0047] Step 3: Divide the crushed feed additive into 9 batches and add them. Keep the temperature of the ethanol solution at 45°C and the stirring speed at 2500 r / min. After adding each batch of feed additive, stir for 7 min and then add the next batch of feed additive until all are added. When adding the third batch of feed additive, add 0.7% of the lecithin by mass of the feed additive at the same time, and finally form a suspension;

[0048] Step 4: Remove the ethanol solvent from the suspension obtained in Step 3 by spray drying (the inlet temperature of spray drying is 65°C and the outlet temperature is 45°C) to obtain the rumen bypass slow-release feed additive.

[0049] Verification test

[0050] Weigh 1000 g of the rumen - bypass slow - release feed additives prepared in Examples 1 - 5 respectively. Each example is divided into five groups, with 200 g in each group. Then, put them into the corresponding beakers filled with 1 L of acidic solution respectively. The pH values of the five groups are 4.0, 4.5, 5.0, 5.5, and 6.0. Add 0.5 g of the corresponding amino acid enzyme into each group of acidic solution, then let them stand still for 6 h, filter, remove the broken particles, weigh the remaining intact particles after drying under negative pressure and low temperature again, and then remove 200 g respectively to obtain the percentages of the intact particles of Examples 1 - 5 that are not damaged in environments with different acidities (i.e., the product qualification rates). The results are shown in Table 1.

[0051]

[0052] Table 1

[0053] As can be seen from the data in Table 1, the qualification rates of the rumen - bypass slow - release feed additives prepared in Examples 1 - 5 of the present invention are all 98.6%. Compared with the qualification rate of less than 85% of the existing products, there is an obvious improvement. Therefore, the present invention can have a high qualification rate with less coating material used, and the production temperature is relatively low, which can not only avoid the feed additive being damaged due to too high temperature but also save energy, thus reducing the production cost of the rumen - bypass slow - release feed additive and facilitating the wide promotion and application of the rumen - bypass slow - release feed additive.

[0054] Finally, it should be noted that the above - mentioned embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rumen bypass slow-release feed additive, characterized in that: It comprises the following substances in parts by weight: 60 - 70 parts of feed additive, 27 - 35 parts of fat powder, and 3 - 5 parts of calcium fatty acid.

2. The rumen bypass sustained-release feed additive according to claim 1, wherein: The feed additive is any one of lysine, methionine, threonine, glutamic acid, and glycine.

3. The rumen bypass slow-release feed additive according to claim 1, characterized in that: The fat powder is any one of stearic acid fat powder and palmitic acid fat powder, or a mixture of the two in any proportion.

4. The rumen bypass slow-release feed additive according to claim 1, wherein: The calcium fatty acid is any one of calcium laurate, calcium myristate, calcium palmitate, and calcium stearate, or a mixture of any two or more of them in any proportion.

5. A preparation method of a rumen bypass slow-release feed additive, characterized in that: It comprises the following steps: Step 1: Weigh the feed additive, fat powder, and calcium fatty acid according to the ratio, crush them respectively, and reserve for later use. Step 2: Heat ethanol, add the fat powder and calcium fatty acid, and stir until completely dissolved. Step 3: Add the crushed feed additive to the ethanol solution obtained in Step 2 to form a suspension under stirring. Step 4: Remove the ethanol solvent from the suspension obtained in Step 3 by spray drying to obtain the rumen bypass slow-release feed additive.

6. The preparation method of a rumen bypass slow-release feed additive according to claim 5, characterized in that: In Step 1, after weighing the feed additive, fat powder, and calcium fatty acid, they are respectively crushed and passed through a 200-mesh sieve for reserve. If there are particles that do not pass through the sieve, they are continuously crushed until all pass through the sieve.

7. The preparation method of a rumen bypass slow-release feed additive according to claim 5, characterized in that: In Step 2, the ethanol is heated to 40 - 50 °C, then the fat powder and calcium fatty acid are added and stirred at a speed of 400 - 600 r / min until the fat powder and calcium fatty acid are completely dissolved; the usage amount of the ethanol is 6 - 8 times the total mass of the fat powder and calcium fatty acid.

8. The preparation method of a rumen bypass slow-release feed additive according to claim 5, characterized in that: In Step 3, the feed additive is added in 8 - 10 batches. The temperature of the ethanol solution is maintained at 40 - 50 °C, and the stirring speed is 2200 - 2800 r / min. After each batch of the feed additive is added, it is stirred for 6 - 8 min, and then the next batch of the feed additive is added until all are added.

9. The preparation method of a rumen bypass slow-release feed additive according to claim 5, characterized in that: In Step 3, 0.5 - 1% of lecithin based on the mass of the feed additive can be added to the ethanol solvent to improve the stability of the suspension.

10. The preparation method of a rumen bypass slow-release feed additive according to claim 5, characterized in that: The inlet temperature of the spray drying is 60 - 70 °C, and the outlet temperature of the spray drying is 40 - 50 °C.

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