Houttuynia cordata extract feed additive and preparation method thereof
A technology of Houttuynia cordata extract and feed additive, applied in the field of Houttuynia cordata extract feed additive and its preparation, to achieve the effects of improving survival rate, reducing production cost, and reducing the incidence of PRRS
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Embodiment 1
[0030] This embodiment relates to a feed additive of Houttuynia cordata extract; its preparation specifically includes the following steps:
[0031] Step 1. Naturally dry the leaves of Houttuynia cordata, remove impurities, dry at 60°C for 6 hours, pulverize, pass through a sieve with an aperture of 0.6mm, add 12ml of ethanol solution per gram of Houttuynia cordata, add 70wt% ethanol solution for immersion for 4 hours; Put it into an ultrasonic extractor, conduct ultrasonic extraction at room temperature and 115KHz for 45 minutes; after the extraction is completed, filter to obtain the filtrate and solid residue a; evaporate under reduced pressure to remove the ethanol in the filtrate to obtain the first extract;
[0032] Step 2, add 8 times the amount of water to the solid residue a, boil for 5 hours, and filter at a steam pressure of 0.5 MPa to obtain the second extract and solid residue b;
[0033] Step 3, add 6 times the amount of water to the solid residue b, boil for 3 h...
Embodiment 2
[0044] The purpose of this example is to consider the influence of pH value on the dry paste rate and the extraction rate of active components in the water extraction step after ultrasonic extraction. The preparation of this example is the same as in Example 1, the difference is that in step 2, acetic acid is added to adjust the pH value of water to 5.5, 6.0, and 6.5, and in step 3, saturated sodium hydroxide is added to adjust the pH value of water to 8.0 and 8.5 , 9.0, forming 9 experimental groups; the pH values of the experimental groups 1 to 9 corresponding to steps 2 and 3 are 5.5, 8.0, 5.5, 8.5, 5.5, 9.0, 6.0, 8.0, 6.0, 8.5, 6.0, 9.0, 6.5, 8.0, 6.5, 8.5, 6.5, 9.0.
[0045] With Houttuynia cordata medical material 100g, the present embodiment, embodiment 1 and comparative example 1 are carried out comparative test; Specifically as follows:
[0046] Determination of dry paste rate: Mix and concentrate the first, second, and third extracts obtained in the above nine exp...
Embodiment 3
[0053] This embodiment relates to a feed additive of Houttuynia cordata extract; its preparation is the same as in Example 1, except that:
[0054] Step 1. Pass through a sieve with a pore size of 0.5mm, add 10ml of ethanol solution to each gram of Houttuynia cordata, add 65wt% ethanol solution for immersion for 5 hours; ultrasonically extract for 35 minutes under the condition of 110KHz;
[0055] Step 2, boil for 4 hours, steam pressure 0.4MPa;
[0056] Step 3: Boil for 5 hours, and the steam pressure is 1.7MPa.
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