Breeding method for improving production performance of pregnant sows

Abstract

The invention provides a breeding method for improving the production performance of pregnant sows, and the breeding method comprises the following steps: (1) from the 25th-35th day of pregnancy to the 55th-65th day of pregnancy of the sows, adding a first nutritional supplement into a sow feed; (2) from the 55th-65th day of pregnancy of the sows to the 85th-95th day of pregnancy of the sows, adding a second nutritional supplement into the feed of the sows; and (3) adding a third nutritional supplement into the sow feed from the 85th-95th day of pregnancy to delivery of the sows. The breeding method provided by the invention can fully meet the nutritional requirements of the pig fetuses, promote the growth and development of the pig fetuses, avoid intrauterine development retardation, relieve oxidative stress of the sows, shorten the birth process, reduce postpartum inflammation of the sows, promote rapid recovery of the sows, reduce the number of weak piglets, improve the birth weight of the piglets, and further improve the survival rate and health state of the piglets.

Description

Technical Field

[0001] The invention belongs to the technical field of sow breeding, and in particular relates to a breeding method for improving the production performance of pregnant sows. Background Art

[0002] With the improvement of breeding technology, the number of piglets born by sows is increasing. The nutrients for fetal development during pregnancy are all derived from the mother. As the number of fetuses increases, the mother cannot provide enough nutrients to meet the normal growth and development needs of all the fetuses in each uterine horn, which causes intrauterine growth retardation in piglets. Intrauterine growth retardation not only affects the birth weight of newborn piglets, but also has many negative effects on the growth and development of their offspring. Currently, more than 20% of newborn piglets are affected by intrauterine growth retardation. In addition to causing perinatal death of the fetus, intrauterine growth retardation will also affect the growth and development of piglets in the neonatal period and in the long term, causing the occurrence of metabolic diseases. About 75% of piglets with intrauterine growth retardation will die before weaning, causing huge losses to pig production.

[0003] In addition, in the late pregnancy of sows, due to the accelerated growth of the fetus, the metabolism of the sow body intensifies, and the intensified metabolism of the body will produce a large number of free radicals (ROS), which will destroy the balance of the body's antioxidant mechanism and lead to the occurrence of oxidative stress. Oxidative stress during maternal pregnancy can cause miscarriage and inhibit fetal growth and development. Studies have shown that oxidative stress and inflammation mediation play a key role in the occurrence of fetal growth retardation.

[0004] Therefore, there is an urgent need to develop a new breeding method that can provide functional nutrients to pregnant sows to meet the nutritional needs of the fetus, promote fetal growth and development, and avoid intrauterine growth retardation; it can relieve sow oxidative stress, improve the antioxidant capacity of the mother and offspring, increase the number of healthy piglets born by sows, and thus improve the reproductive performance of sows. Summary of the invention

[0005] In view of the deficiencies of the prior art, the object of the present invention is to provide a breeding method for improving the production performance of pregnant sows. The breeding method provided by the present invention can fully meet the nutritional needs of piglets, promote the growth and development of piglets, avoid intrauterine growth retardation, reduce oxidative stress in sows, shorten the delivery process, reduce postpartum inflammation in sows, promote rapid recovery of sows, reduce the number of weak piglets, increase the birth weight of piglets, and thus improve the survival rate and health status of piglets.

[0006] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0007] The present invention provides a breeding method for improving the production performance of pregnant sows, and the breeding method comprises the following steps:

[0008] (1) adding a first nutritional supplement to the sow feed from day 25 to 35 of gestation to day 55 to 65 of gestation;

[0009] (2) adding a second nutritional supplement to the sow feed starting from day 55-65 of gestation to day 85-95 of gestation;

[0010] (3) Add the third nutritional supplement to the sow's feed from the 85th to 95th day of gestation until farrowing.

[0011] Preferably, the first nutritional supplement comprises 30-50 parts of animal and plant extracts, 0.2-2 parts of arbutin and 30-80 parts of wall materials in parts by weight, wherein the animal and plant extracts can be 30 parts, 35 parts, 40 parts, 45 parts or 50 parts, etc., the arbutin can be 0.2 parts, 0.5 parts, 1 parts, 1.5 parts or 2 parts, etc., and the wall materials can be 30 parts, 40 parts, 50 parts, 60 parts, 70 parts or 80 parts, etc., but are not limited to the values ​​listed above, and other values ​​not listed within the above numerical range are equally applicable.

[0012] Preferably, the second nutritional supplement further comprises 1-5 parts of nicotinamide mononucleotide based on the first nutritional supplement in parts by weight, such as 1 part, 2 parts, 3 parts, 4 parts or 5 parts, but is not limited to the above-listed values, and other values ​​not listed within the above numerical range are also applicable.

[0013] Preferably, the third nutritional supplement further comprises 0.5-2 parts of luteolin and 0.1-1 parts of punicalagin in parts by weight on the basis of the second nutritional supplement, wherein the amount of luteolin can be 0.5 parts, 1 parts, 1.5 parts or 2 parts, etc., and the amount of punicalagin can be 0.1 parts, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts or 1 parts, etc., but are not limited to the values ​​listed above, and other values ​​not listed within the above numerical range are equally applicable.

[0014] The above-mentioned breeding method can fully meet the nutritional needs of the pig fetus by adding different nutritional supplements at different stages of sow pregnancy, promote the growth and development of the pig fetus, avoid intrauterine growth retardation, reduce the oxidative stress of the sow, shorten the delivery process, reduce the postpartum inflammation of the sow, promote the rapid recovery of the sow, and can reduce the number of weak piglets, increase the birth weight of piglets, and thereby improve the survival rate and health status of piglets.

[0015] Preferably, the plant and animal extracts include any one of Lonicera caerulea extract, Nitraria tangutorum leaf extract or Sea Cucumber flower extract or a combination of at least two thereof, preferably a combination of Lonicera caerulea extract, Nitraria tangutorum leaf extract and Sea Cucumber flower extract.

[0016] Preferably, the mass ratio of the blue Indigo Carp extract, the Nitraria tangutorum leaf extract and the sea cucumber flower extract is (2-5):(3-4):(0.5-1), wherein the number of portions of the blue Indigo Carp extract can be 2, 2.5, 3, 3.5, 4, 4.5 or 5, etc., the number of portions of the Nitraria tangutorum leaf extract can be 3, 3.2, 3.4, 3.6, 3.8 or 4, etc., and the number of portions of the sea cucumber flower extract can be 0.5, 0.6, 0.7, 0.8, 0.9 or 1, etc., but are not limited to the values ​​listed above, and other values ​​not listed within the above numerical range are equally applicable.

[0017] The extract of Nitraria tangutorum leaves has anti-inflammatory and antioxidant properties, which can reduce the expression of maternal inflammatory factors and maintain the balance of maternal oxidative stress.

[0018] Blue Indigo Fruit Extract is rich in polyphenols and has strong free radical scavenging ability. It can effectively remove free radicals in the sow's body, improve the sow's antioxidant capacity, and reduce the sow's oxidative stress.

[0019] Sea cucumber pollen is rich in protein and n-3 polyunsaturated fatty acids, and contains a variety of chemical substances with novel structures and diverse biological activities. It has a protective effect on the mother's uterus, can promote embryonic development, and alleviate intrauterine growth retardation in piglets.

[0020] The combination of the above-mentioned specific animal and plant extracts can synergistically enhance the effectiveness of the product.

[0021] Luteolin has antihypertensive, anti-allergic, antioxidant and anti-inflammatory effects. Supplementation of luteolin during pregnancy can reduce the expression of inflammatory factors in the serum of sows, thereby alleviating intrauterine growth retardation of piglets.

[0022] Punicalagin has antioxidant and anti-inflammatory functions. Adding it to the feed of pregnant sows can reduce oxidative stress and improve the reproductive performance of sows.

[0023] Arbutin has anti-inflammatory and antioxidant activities and can promote embryonic development.

[0024] Nicotinamide mononucleotide can reduce maternal free radicals and enhance the developmental capacity of early embryos.

[0025] There is a synergistic effect among the ingredients of the above-mentioned nutritional supplements, which can effectively scavenge free radicals, improve the sow's postpartum glucose and lipid metabolism disorders, maintain the sow's body health, promote the sow's rapid recovery, meet the nutritional needs of the fetus, promote the growth and development of the fetus, avoid intrauterine growth retardation, and improve the survival rate and health status of piglets.

[0026] Preferably, the wall material comprises casein and / or whey powder.

[0027] Preferably, the added amount of the first nutritional supplement in step (1) is 0.1-0.5% of the mass of sow feed, such as 0.1%, 0.2%, 0.3%, 0.4% or 0.5%, etc., but is not limited to the values ​​listed above, and other values ​​not listed within the above numerical range are also applicable.

[0028] Preferably, the added amount of the second nutritional supplement in step (2) is 0.5-1% of the mass of sow feed, such as 0.5%, 0.6%, 0.7%, 0.8%, 0.9% or 1%, etc., but is not limited to the values ​​listed above. Other values ​​not listed within the above numerical range are also applicable.

[0029] Preferably, the added amount of the third nutritional supplement in step (3) is 1-3% of the mass of sow feed, such as 1%, 1.5%, 2%, 2.5% or 3%, etc., but is not limited to the values ​​listed above. Other values ​​not listed within the above numerical range are also applicable.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention provides a breeding method for improving the production performance of pregnant sows. By adding different nutritional supplements at different stages of sow pregnancy, the nutritional needs of the pig fetus can be fully met, the growth and development of the pig fetus can be promoted, intrauterine growth retardation can be avoided, the oxidative stress of the sow can be alleviated, the labor process can be shortened, the postpartum inflammation of the sow can be reduced, the rapid recovery of the sow can be promoted, the number of weak piglets can be reduced, the birth weight of piglets can be increased, and the survival rate and health status of the piglets can be improved. DETAILED DESCRIPTION

[0032] In order to further explain the technical means and effects adopted by the present invention, the technical solution of the present invention is further described below in conjunction with the preferred embodiments of the present invention, but the present invention is not limited to the scope of the embodiments.

[0033] In the following examples, sea cucumber flower extract and Nitraria thornia leaf extract were purchased from Ningxia Vanilla Biotechnology Co., Ltd.;

[0034] Blue Indigo Fruit Extract was purchased from Fufeng Snort Biotechnology Co., Ltd.;

[0035] Punicalagin was purchased from Munster (Chengdu) Biotechnology Co., Ltd.;

[0036] Luteolin was purchased from Xi'an Tianguangyuan Biotechnology Co., Ltd.;

[0037] Arbutin was purchased from Xi'an Shenghecui Biotechnology Co., Ltd.;

[0038] Nicotinamide mononucleotide was purchased from Shandong Xinxiong Biotechnology Co., Ltd.

[0039] Preparation Example 1

[0040] This preparation example provides a nutritional supplement, the specific ingredients (by weight) are as follows:

[0041] 40 parts of plant and animal extracts (blue indigo fruit extract, white thorn leaf extract, sea cucumber flower extract, mass ratio 3:3.5:0.7), 1 part of arbutin, and 60 parts of wall materials (casein, whey powder, mass ratio 2:5).

[0042] Preparation Example 2

[0043] This preparation example provides a nutritional supplement, the specific ingredients (by weight) are as follows:

[0044] 50 parts of plant and animal extracts (blue indigo fruit extract, white thorn leaf extract, sea cucumber flower extract, mass ratio 2:3:0.5), 0.2 parts of arbutin, and 80 parts of wall materials (casein, whey powder, mass ratio 1:3).

[0045] Preparation Example 3

[0046] This preparation example provides a nutritional supplement, the specific ingredients (by weight) are as follows:

[0047] 30 parts of plant and animal extracts (blue indigo fruit extract, white thorn leaf extract, sea cucumber flower extract, mass ratio 5:4:1), 2 parts of arbutin, and 30 parts of wall materials (casein, whey powder, mass ratio 3:7).

[0048] Preparation Example 4

[0049] This preparation example provides a nutritional supplement, and the specific ingredients are consistent with those in Preparation Example 1, except that the blue indigo fruit extract is not included and the reduced portion is proportionally distributed to the white thorn leaf extract and the sea cucumber flower extract.

[0050] Preparation Example 5

[0051] This preparation example provides a nutritional supplement, and the specific ingredients are consistent with those in Preparation Example 1, except that the Nitraria thornia leaf extract is not included and the reduced portion is proportionally distributed to the Indigo Carthamus edulis extract and the Sea Cucumber Flower Extract.

[0052] Preparation Example 6

[0053] This preparation example provides a nutritional supplement, and the specific ingredients are consistent with those in Preparation Example 1, except that the sea cucumber flower extract is not included and the reduced portion is proportionally distributed to the Nitraria thorni leaf extract and the Indigofera caerulea extract.

[0054] Preparation Example 7

[0055] This preparation example provides a nutritional supplement, and the specific ingredients are consistent with those in Preparation Example 1 except that the animal and plant extracts are not included and the portion allocated to arbutin is reduced.

[0056] Preparation Example 8

[0057] This preparation example provides a nutritional supplement, and the specific ingredients are consistent with those in Preparation Example 1 except that arbutin is not included and a reduced portion is allocated to animal and plant extracts.

[0058] Preparation Example 9

[0059] This preparation example provides a nutritional supplement, the specific ingredients (by weight) are as follows:

[0060] 40 parts of plant and animal extracts (blue indigo fruit extract, white thorn leaf extract, sea cucumber flower extract, mass ratio 3:3.5:0.7), 1 part of arbutin, 3 parts of nicotinamide mononucleotide, and 60 parts of wall materials (casein, whey powder, mass ratio 2:5).

[0061] Preparation Example 10

[0062] This preparation example provides a nutritional supplement, the specific ingredients (by weight) are as follows:

[0063] 50 parts of plant and animal extracts (blue indigo fruit extract, white thorn leaf extract, sea cucumber flower extract, mass ratio 2:3:0.5), 0.2 parts of arbutin, 5 parts of nicotinamide mononucleotide, and 80 parts of wall materials (casein, whey powder, mass ratio 1:3).

[0064] Preparation Example 11

[0065] This preparation example provides a nutritional supplement, the specific ingredients (by weight) are as follows:

[0066] 30 parts of plant and animal extracts (blue indigo fruit extract, white thorn leaf extract, sea cucumber flower extract, mass ratio 5:4:1), 2 parts of arbutin, 1 part of nicotinamide mononucleotide, and 30 parts of wall materials (casein, whey powder, mass ratio 3:7).

[0067] Preparation Example 12

[0068] This preparation example provides a nutritional supplement, and the specific ingredients are consistent with those of Preparation Example 9, except that nicotinamide mononucleotide is not included and the reduced portion is proportionally distributed to animal and plant extracts and arbutin.

[0069] Preparation Example 13

[0070] This preparation example provides a nutritional supplement, which is consistent with Preparation Example 9 except that arbutin and plant and animal extracts are not included and a reduced portion is allocated to nicotinamide mononucleotide.

[0071] Preparation Example 14

[0072] This preparation example provides a nutritional supplement, the specific ingredients (by weight) are as follows:

[0073] 40 parts of animal and plant extracts (blue indigo fruit extract, white thorn leaf extract, sea cucumber flower extract, mass ratio 3:3.5:0.7), 1 part of arbutin, 3 parts of nicotinamide mononucleotide, 1.2 parts of luteolin, 0.5 parts of punicalagin, 60 parts of wall materials (casein, whey powder, mass ratio 2:5).

[0074] Preparation Example 15

[0075] This preparation example provides a nutritional supplement, the specific ingredients (by weight) are as follows:

[0076] 50 parts of animal and plant extracts (blue indigo fruit extract, white thorn leaf extract, sea cucumber flower extract, mass ratio 2:3:0.5), 0.2 parts of arbutin, 5 parts of nicotinamide mononucleotide, 0.5 parts of luteolin, 1 part of punicalagin, 80 parts of wall materials (casein, whey powder, mass ratio 1:3).

[0077] Preparation Example 16

[0078] This preparation example provides a nutritional supplement, the specific ingredients (by weight) are as follows:

[0079] 30 parts of plant and animal extracts (blue indigo fruit extract, white thorn leaf extract, sea cucumber flower extract, mass ratio 5:4:1), 2 parts of arbutin, 1 part of nicotinamide mononucleotide, 2 parts of luteolin, 0.1 parts of punicalagin, 30 parts of wall materials (casein, whey powder, mass ratio 3:7).

[0080] Preparation Example 17

[0081] This preparation example provides a nutritional supplement, and the specific ingredients are consistent with those of Preparation Example 14, except that arbutin and animal and plant extracts are not included and the reduced parts are proportionally distributed to nicotinamide mononucleotide, luteolin and punicalagin.

[0082] Preparation Example 18

[0083] This preparation example provides a nutritional supplement, and the specific ingredients are consistent with those of Preparation Example 14, except that nicotinamide mononucleotide is not included and the reduced portion is proportionally distributed to arbutin, plant and animal extracts, luteolin and punicalagin.

[0084] Preparation Example 19

[0085] This preparation example provides a nutritional supplement, and the specific ingredients are consistent with those of Preparation Example 14, except that luteolin and punicalagin are not included and the reduced portions are proportionally distributed to nicotinamide mononucleotide, arbutin and animal and plant extracts.

[0086] Example 1

[0087] This embodiment provides a breeding method for improving the production performance of pregnant sows, and the specific steps are as follows:

[0088] (1) On the 30th to 60th day of gestation of the sow, 0.3% of the nutritional supplement provided in Preparation Example 1 was added to the sow feed;

[0089] (2) On the 60th to 90th day of gestation of the sow, 0.7% of the nutritional supplement provided in Preparation Example 9 was added to the sow feed;

[0090] (3) From the 90th day of gestation to farrowing, 2% of the nutritional supplement provided in Preparation Example 14 was added to the sow feed.

[0091] Example 2

[0092] This embodiment provides a breeding method for improving the production performance of pregnant sows, and the specific steps are as follows:

[0093] (1) On the 25th to 55th day of sow gestation, 0.1% of the nutritional supplement provided in Preparation Example 2 was added to the sow feed;

[0094] (2) On the 55th to 85th day of gestation of the sow, 1% of the nutritional supplement provided in Preparation Example 10 was added to the sow feed;

[0095] (3) From the 85th day of gestation to farrowing, 1% of the nutritional supplement provided in Preparation Example 15 was added to the sow feed.

[0096] Example 3

[0097] This embodiment provides a breeding method for improving the production performance of pregnant sows, and the specific steps are as follows:

[0098] (1) On the 35th to 65th day of gestation of the sow, 0.5% of the nutritional supplement provided in Preparation Example 3 was added to the sow feed;

[0099] (2) On the 65th to 95th day of gestation of the sow, 0.5% of the nutritional supplement provided in Preparation Example 11 was added to the sow feed;

[0100] (3) From the 95th day of gestation to farrowing, 3% of the nutritional supplement provided in Preparation Example 16 was added to the sow feed.

[0101] Embodiment 4-6

[0102] Examples 4-6 respectively provide a breeding method for improving the production performance of pregnant sows. In the specific steps, except that the nutritional supplements provided in Preparation Example 1 are replaced with equal amounts of nutritional supplements provided in Preparation Examples 4-6, the rest are the same as in Example 1.

[0103] Comparative Example 1-2

[0104] Comparative Examples 1-4 respectively provide a breeding method for improving the production performance of pregnant sows. In the specific steps, except that the nutritional supplements provided in Preparation Example 1 are replaced by equal amounts of nutritional supplements provided in Preparation Examples 7-8, the rest are consistent with Example 1.

[0105] Comparative Examples 3-4

[0106] Comparative Examples 3-4 respectively provide a breeding method for improving the production performance of pregnant sows. In the specific steps, except that the nutritional supplements provided in Preparation Example 9 are replaced by equal amounts of nutritional supplements provided in Preparation Examples 12-13, the rest are consistent with Example 1.

[0107] Comparative Examples 5-7

[0108] Comparative Examples 5-7 respectively provide a breeding method for improving the production performance of pregnant sows. In the specific steps, except that the nutritional supplements provided in Preparation Example 14 are replaced by equal amounts of nutritional supplements provided in Preparation Examples 17-19, the rest are consistent with Example 1.

[0109] Comparative Example 8

[0110] This comparative example provides a breeding method for improving the production performance of pregnant sows, and the specific steps are as follows:

[0111] (1) On the 60th to 90th day of gestation of the sow, 0.7% of the nutritional supplement provided in Preparation Example 9 was added to the sow feed;

[0112] (2) From the 90th day of gestation to farrowing, 2% of the nutritional supplement provided in Preparation Example 14 was added to the sow feed.

[0113] Comparative Example 9

[0114] This comparative example provides a breeding method for improving the production performance of pregnant sows, and the specific steps are as follows:

[0115] (1) On the 30th to 60th day of gestation of the sow, 0.3% of the nutritional supplement provided in Preparation Example 1 was added to the sow feed;

[0116] (2) From the 90th day of gestation to farrowing, 2% of the nutritional supplement provided in Preparation Example 14 was added to the sow feed.

[0117] Comparative Example 10

[0118] This comparative example provides a breeding method for improving the production performance of pregnant sows, and the specific steps are as follows:

[0119] (1) On the 30th to 60th day of gestation of the sow, 0.3% of the nutritional supplement provided in Preparation Example 1 was added to the sow feed;

[0120] (2) On the 60th to 90th day of sow gestation, 0.7% of the nutritional supplement provided in Preparation Example 9 was added to the sow feed.

[0121] Comparative Example 11

[0122] This comparative example provides a breeding method for improving the production performance of pregnant sows, and the specific steps are as follows:

[0123] (1) On the 30th to 60th day of sow gestation, 0.3% of the nutritional supplement provided in Preparation Example 14 was added to the sow feed;

[0124] (2) On the 60th to 90th day of gestation of the sow, 0.7% of the nutritional supplement provided in Preparation Example 1 was added to the sow feed;

[0125] (3) From the 90th day of gestation to farrowing, 2% of the nutritional supplement provided in Preparation Example 9 was added to the sow feed.

[0126] Effect test:

[0127] 108 sows with similar parity, similar body weight and backfat thickness, good health and gestation for 25 days were selected and randomly divided into 18 groups, with 6 replicates in each group and 1 sow in each replicate. The control group was fed with a basic sow feed (65% corn, 12% soybean meal, 2% fish meal, 17% bran, 4% premix, and the premix was purchased from Guangzhou Aonong Biotechnology Co., Ltd.), and the experimental group was raised by the methods provided in Examples 1-6 and Comparative Examples 1-11, respectively.

[0128] When sows give birth, the total number of piglets born, the number of piglets born alive, and the number of weak piglets are recorded.

[0129] The individual weight and litter weight of piglets at birth (weighed within 12 hours after birth) were recorded, and piglets with a birth weight ≤ 0.8 kg were defined as weak piglets.

[0130] The weak piglet rate = total number of weak piglets in the group / total number of piglets born alive at the beginning of the group.

[0131] The results are as follows.

[0132]

[0133] On the day of sow farrowing, blood samples were collected from the ear vein in a heparinized centrifuge tube (10 mL) and centrifuged in a low-temperature ultracentrifuge at 3000×g and 4°C for 10 min. The supernatant was collected and divided into centrifuge tubes and stored in a -20°C refrigerator. The following indicators were tested.

[0134] Oxidative stress index test: The serum total superoxide dismutase T-SOD, malondialdehyde MDA content, and reactive oxygen free radicals ROS were detected using a kit (Nanjing Jiancheng Bioengineering Institute).

[0135]

[0136]

[0137] Inflammatory index test: IL-6 and IL-10 were determined using porcine ELISA kits (Bio-Camio, Nanjing, China), and the specific measurement steps were carried out according to the instructions of the kit.

[0138] Group IL-6 (ng / L) IL-10 (ng / L) Control group 238 178 Example 1 161 121 Example 2 168 125 Example 3 165 123 Example 4 180 131 Example 5 173 135 Example 6 176 133 Comparative Example 1 197 147 Comparative Example 2 191 139 Comparative Example 3 188 145 Comparative Example 4 201 142 Comparative Example 5 213 158 Comparative Example 6 196 150 Comparative Example 7 202 153 Comparative Example 8 218 157 Comparative Example 9 223 161 Comparative Example 10 228 165 Comparative Example 11 192 143

[0139] According to the above results, it can be found that the breeding method provided by the present invention can effectively improve the production performance of pregnant sows, meet the nutritional needs of piglets, promote the growth and development of piglets, avoid intrauterine growth retardation, reduce oxidative stress in sows, shorten the labor process, reduce postpartum inflammation in sows, promote rapid recovery of sows, and can reduce the number of weak piglets, increase the birth weight of piglets, and thus improve the survival rate and health status of piglets. Comparing Examples 1, 4-6 and Comparative Examples 1-7, it can be found that the present invention further improves the effect of the breeding method by selecting nutritional supplements of specific raw materials, and the synergistic effect between the components; Comparing Example 1, Comparative Examples 8-11 and the control group, it can be found that the present invention can effectively improve the production performance of pregnant sows by using nutritional supplements and adding them according to a specific process.

[0140] The applicant declares that the present invention uses the above-mentioned embodiments to illustrate the breeding method for improving the production performance of pregnant sows of the present invention, but the present invention is not limited to the above-mentioned embodiments, that is, it does not mean that the present invention must rely on the above-mentioned embodiments to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0141] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0142] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A breeding method for improving the production performance of pregnant sows, characterized in that: The breeding method comprises the following steps: (1) adding a first nutritional supplement to the sow feed from day 25 to 35 of gestation to day 55 to 65 of gestation; (2) adding a second nutritional supplement to the sow feed starting from day 55-65 of gestation and ending at day 85-95 of gestation; (3) Adding a third nutritional supplement to the sow feed from day 85 to 95 of gestation until farrowing; The first nutritional supplement comprises, by weight, 30-50 parts of animal and plant extracts, 0.2-2 parts of arbutin, and 30-80 parts of wall materials; The second nutritional supplement comprises, by weight, 30-50 parts of plant and animal extracts, 0.2-2 parts of arbutin, 30-80 parts of wall materials, and 1-5 parts of nicotinamide mononucleotide; The third nutritional supplement comprises, by weight, 30-50 parts of animal and plant extracts, 0.2-2 parts of arbutin, 30-80 parts of wall materials, 1-5 parts of nicotinamide mononucleotide, 0.5-2 parts of luteolin and 0.1-1 parts of punicalagin.

2. The breeding method for improving the production performance of pregnant sows according to claim 1, characterized in that: The plant and animal extracts include any one of blue loquat fruit extract, white loquat leaf extract or sea cucumber flower extract, or a combination of at least two of them.

3. The breeding method for improving the production performance of pregnant sows according to claim 2, characterized in that: The plant and animal extract is a combination of blue loquat fruit extract, white loquat leaf extract and sea cucumber flower extract.

4. The breeding method for improving the production performance of pregnant sows according to claim 3, characterized in that: The mass ratio of the blue indigo fruit extract, the white thorn leaf extract and the sea cucumber flower extract is (2-5):(3-4):(0.5-1).

5. The breeding method for improving the production performance of pregnant sows according to any one of claims 1 to 4, characterized in that: The wall material comprises casein and / or whey powder.

6. The breeding method for improving the production performance of pregnant sows according to any one of claims 1 to 5, characterized in that: In step (1), the amount of the first nutritional supplement added is 0.1-0.5% of the mass of the sow feed.

7. The breeding method for improving the production performance of pregnant sows according to any one of claims 1 to 6, characterized in that: In step (2), the amount of the second nutritional supplement added is 0.5-1% of the mass of the sow feed.

8. The breeding method for improving the production performance of pregnant sows according to any one of claims 1 to 7, characterized in that: The amount of the third nutritional supplement added in step (3) is 1-3% of the mass of the sow feed.

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