Application of pterostilbene in reducing drip loss of pork of slaughtered fattening pigs

Abstract

The invention discloses application of pterostilbene in reducing drip loss of pork of slaughtered fattening pigs, and belongs to the field of feed additives. The pterostilbene is directly added into the fattening pig feed, the fattening pigs are fed at the stage of 50-120 kg, the addition amount is 200 mg / kg, the purity of the pterostilbene is larger than 98%, the drip loss of slaughtered pork can be reduced, and then the economic value and appearance of the pork are improved.

Description

Technical Field

[0001] The invention relates to the field of feed additives, and in particular to pterostilbene as a feed additive added into fattening pig feed, which can reduce the drip loss of pork of the fattening pig after slaughter. Background Art

[0002] Meat mainly contains about 75% water, 25% protein and 5% fat. Meat loses a lot of water during transportation, storage and retail. The loss of water directly leads to the loss of meat weight, resulting in huge economic losses. In addition, the loss of water in meat will also cause the loss of heme, which will damage the appearance of the meat. Therefore, drip loss is an important economic indicator for measuring meat quality and significantly affects consumers' purchasing desire.

[0003] Pork is one of the most consumed meat products in the world. In recent years, genetic breeding has tended to select pigs with high growth efficiency and lean meat rate, which has a negative impact on meat quality indicators such as pork drip loss. In order to reduce the drip loss of pork, it is a common practice in the food industry to add various antioxidants to pork and its meat products after pigs are slaughtered. However, this strategy is often time-consuming and labor-intensive, and is prone to food safety issues and is not easily accepted by consumers. Another strategy to reduce the drip loss of pork is to change the nutritional structure of pig feed or add functional additives to the feed. Among these functional additives, plant extracts are green, healthy and residue-free. Therefore, adding plant extracts to pig feed to reduce the drip loss of pork after slaughter is a simpler, greener and more acceptable strategy for consumers.

[0004] Pterostilbene is a phenolic substance extracted from edible plants such as blueberries, grapes, and peanuts. It is very safe. Pterostilbene has a wide range of biological activities, including antioxidant, anti-inflammatory, antibacterial, and antiviral effects. In the past, only one study reported that adding pterostilbene to chicken feed can reduce the drip loss of chicken breast. However, there has been no report on the effect of adding pterostilbene to pig feed on the drip loss of pork after slaughter.

[0005] Based on this, the present invention has made a new discovery on the application of pterostilbene, and proposed a solution for adding pterostilbene into feed to reduce the drip loss of pork after fattening pigs are slaughtered. Summary of the invention

[0006] Based on the above analysis, the present invention proposes a new application of pterostilbene in reducing the drip loss of fattening pigs after slaughter, which mainly solves the technical problem of reducing the drip loss of fattening pigs after slaughter by adding pterostilbene to the feed. The present invention is achieved by the following technical means:

[0007] The invention discloses that adding pterostilbene into feed to feed fattening pigs can reduce the drip loss of pork after slaughter.

[0008] Furthermore, the pterostilbene provided by the present invention was purchased from Nanjing Jingzhu Biotechnology Co., Ltd., with a purity greater than 98%.

[0009] Furthermore, the pterostilbene is added in an amount of 200 mg / kg in the fattening pig feed.

[0010] Furthermore, the fattening pig weighs 50-120kg.

[0011] Furthermore, when the weight of the fattening pig is 50-100 kg, the composition of the feed includes:

[0012] The 50-100kg stage formula includes: corn 73.9%, corn DDGS 7.66%, rice bran meal 8%, soybean meal 4%, soybean oil 1.5%, wheat bran 2.21%, L-lysine hydrochloride 0.53%, DL-methionine 0.06%, L-threonine 0.14%, L-tryptophan 0.05%, 50% choline chloride 0.15%, calcium powder 0.79%, calcium hydrogen phosphate 0.48%, sodium chloride 0.3%, vitamin premix 0.03%, and mineral premix 0.2%.

[0013] Furthermore, when the weight of the fattening pig is 100-120 kg, the composition of the feed includes:

[0014] Corn 80.49%, corn DDGS 4.51%, rice bran meal 8.5%, soybean oil 1%, wheat bran 3%, L-lysine hydrochloride 0.49%, DL-methionine 0.04%, L-threonine 0.14%, L-tryptophan 0.05%, 50% choline chloride 0.15%, calcium powder 0.74%, calcium hydrogen phosphate 0.36%, sodium chloride 0.3%, vitamin premix 0.03%, mineral premix 0.2%.

[0015] Furthermore, the vitamin premix provides per kilogram of feed:

[0016] Vitamin A 9000IU, Vitamin D3 3000IU, Vitamin E 24IU, Vitamin K3 3mg, Vitamin B1 3mg, Vitamin B2 7.5mg, Vitamin B6 3.6mg, Vitamin B12 0.036mg, Biotin 0.15mg, Pantothenic Acid 15mg, Folic Acid 1.5mg, Niacinamide 30mg.

[0017] Furthermore, the mineral premix provides per kilogram of feed:

[0018] Copper 3mg, iron 40mg, manganese 2mg; selenium 0.15mg, iodine 0.14mg, zinc 50mg.

[0019] The invention discloses a feed for reducing the drip loss of pork of fattening pigs after slaughter. 200 mg / kg of pterostilbene is added to the fattening pig feed.

[0020] The beneficial effects of the present invention are:

[0021] Adding 200 mg / kg of pterostilbene to the feed of fattening pigs can reduce the drip loss of pork after slaughter, thereby improving the economic value and appearance of pork. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to examples, but the protection scope of the present invention is not limited to the following embodiments.

[0023] Example 1

[0024] Twelve Duroc castrated boars with an average weight of about 58 kg were selected and randomly divided into two groups, with 6 replicates in each group and one pig in each replicate. The feeding temperature was about 25℃, and they were fed with free access to feed and water for a total of 9 weeks. The weight reached about 120 kg at the time of slaughter.

[0025] The control group was fed a corn-soybean meal diet;

[0026] The experimental group was fed a diet supplemented with 200 mg / kg pterostilbene on top of the diet of the control group;

[0027] The dietary composition of the fattening pigs in the control group at the 50-100kg stage was: corn 73.9%, corn DDGS 7.66%, rice bran meal 8%, soybean meal 4%, soybean oil 1.5%, wheat bran 2.21%, L-lysine hydrochloride 0.53%, DL-methionine 0.06%, L-threonine 0.14%, L-tryptophan 0.05%, 50% choline chloride 0.15%, calcium powder 0.79%, calcium hydrogen phosphate 0.48%, sodium chloride 0.3%, vitamin premix 0.03%, and mineral premix 0.2%.

[0028] The dietary composition of the fattening pigs in the control group at the 100-120kg stage was: 80.49% corn, 4.51% corn DDGS, 8.5% rice bran meal, 1% soybean oil, 3% wheat bran, 0.49% L-lysine hydrochloride, 0.04% DL-methionine, 0.14% L-threonine, 0.05% L-tryptophan, 0.15% 50% choline chloride, 0.74% calcium powder, 0.36% calcium hydrogen phosphate, 0.3% sodium chloride, 0.03% vitamin premix, and 0.2% mineral premix.

[0029] The experimental group was given an additional 200 mg / kg of pterostilbene on top of the control group's diet.

[0030] Before the formal experiment began, the animals were pre-fed with the control diet for 5 days. Sampling was performed after 9 weeks of the experiment.

[0031] The bag method was used to determine the drip loss. The longissimus dorsi muscle between the 3rd and 4th intercostal spaces from the left half of the pig carcass was taken and the muscle was trimmed into 5cm×2cm×2cm pieces along the direction of the muscle fibers. The meat sample was hung up with a metal hook, covered with a plastic bag and the bag mouth was tied with a rope to prevent the meat sample from contacting the bag. The weight of the meat sample was recorded as W1 and immediately hung in a 4°C refrigerator for storage. After 2 days of storage, the meat was taken out and the surface moisture of the meat sample was absorbed with filter paper, and the weight was recorded as W2. The drip loss was calculated according to the formula (W1-W2) / W1×100%. It was hung up again, and the weight was measured again after 3 days and 7 days and recorded as W3 and W7. The drip loss was calculated according to the same formula. The statistical results of the drip loss data are shown in Table 1.

[0032] Table 1 Drip loss data of fattening pigs after slaughter

[0033]

[0034] Note: *** Indicates that the statistical difference is extremely significant (P < 0.001)

[0035] The results of this experiment showed that compared with the control group, the experimental group with 200 mg / kg pterostilbene added to the feed significantly reduced the drip loss of pork after storage for 2, 3 and 7 days after slaughter, indicating that adding 200 mg / kg pterostilbene to the pig feed can reduce the drip loss of pork after slaughter.

[0036] Although the content of the present invention has been described in detail through the above-mentioned implementation cases, it should be appreciated that the above-mentioned description should not be considered as limiting the present invention. After reading the above-mentioned content, it will be obvious for those skilled in the art to make various modifications and substitutions to the present invention. Therefore, the protection scope of the present invention should be limited by the attached claims.

Claims

1. The application of pterostilbene in reducing the drip loss of fattening pigs after slaughter, including: Pterostilbene was added to the feed of fattening pigs, and the added amount of pterostilbene was 200 mg / kg.

2. The use according to claim 1, wherein: The fattening pigs weigh 50-120 kg.

3. The use according to claim 2, wherein: When the weight of the fattening pig is 50-100 kg, the composition of the feed includes: Corn 73.9%, corn DDGS 7.66%, rice bran meal 8%, soybean meal 4%, soybean oil 1.5%, wheat bran 2.21%, L-lysine hydrochloride 0.53%, DL-methionine 0.06%, L-threonine 0.14%, L-tryptophan 0.05%, 50% choline chloride 0.15%, calcium powder 0.79%, calcium hydrogen phosphate 0.48%, sodium chloride 0.3%, vitamin premix 0.03%, mineral premix 0.2%.

4. The use according to claim 2, wherein: When the weight of the fattening pig is 100-120kg, the composition of the feed includes: Corn 80.49%, corn DDGS 4.51%, rice bran meal 8.5%, soybean oil 1%, wheat bran 3%, L-lysine hydrochloride 0.49%, DL-methionine 0.04%, L-threonine 0.14%, L-tryptophan 0.05%, 50% choline chloride 0.15%, calcium powder 0.74%, calcium hydrogen phosphate 0.36%, sodium chloride 0.3%, vitamin premix 0.03%, mineral premix 0.2%.

5. The use according to claim 3 or 4, wherein: The vitamin premix provides per kilogram of feed: Vitamin A 9000IU, Vitamin D3 3000IU, Vitamin E 24IU, Vitamin K3 3mg, Vitamin B1 3mg, Vitamin B2 7.5mg, Vitamin B6 3.6mg, Vitamin B12 0.036mg, Biotin 0.15mg, Pantothenic Acid 15mg, Folic Acid 1.5mg, Niacinamide 30mg; The mineral premix provides per kilogram of feed: Copper 3mg, iron 40mg, manganese 2mg, selenium 0.15mg, iodine 0.14mg, zinc 50mg.

6. The use according to claim 1, wherein: The purity of pterostilbene is greater than 98%.

7. A feed for reducing drip loss of fattening pigs after slaughter, wherein: Add 200 mg / kg of pterostilbene to the feed of fattening pigs.

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