Mixed additive for promoting growth speed of local pigs, application and pig feed

Abstract

The invention belongs to the field of feed, and discloses a mixed additive for promoting the growth speed of local pigs, which comprises hermetia illucens grease extract and compound grease, the composite grease is composed of soybean oil, palm kernel oil, linseed oil, palm oil, rapeseed oil, soybean lecithin oil and lysolecithin. The weight ratio of the hermetia illucens grease extract to the soybean oil to the palm kernel oil to the linseed oil to the palm oil to the rapeseed oil to the soybean lecithin oil to the lysolecithin is (1-5): (50-70): (5-10): (5-10): (1-5): (5-10): (5-10): (1-5). According to the additive, different greases are compounded, and the ratio of n-6 to n-3 is scientifically controlled, so that the additive is particularly suitable for the growth of local native pigs, and meanwhile, the additive has an obvious promoting effect on the intramuscular fat content of the local native pigs. Meanwhile, the invention further discloses application of the additive and pig feed.

Description

Technical Field

[0001] The invention relates to the field of feed, in particular to a mixed additive for promoting the growth rate of local pigs, and its application and pig feed. Background Art

[0002] Oils and fats provide pigs with essential energy and fatty acids, which have a direct impact on their growth and meat quality. Adding appropriate amounts of oils and fats to feed not only increases satiety and stimulates appetite, thereby accelerating growth, but also makes the meat firmer and more flavorful. Besides its beneficial effects on growth and meat quality, oils and fats are also rich in nutrients such as antioxidants and vitamin E, which play an important role in boosting pigs' immune function and disease resistance. Furthermore, the addition of oils and fats helps improve digestion efficiency and promotes their absorption and utilization of nutrients in the feed.

[0003] The breeding methods of local native pigs such as Guangdong Black Pig and Ningxiang Pig are increasingly valued, but the research on the breeding science of these local specialty pig breeds is mostly in its infancy. In this field, the impact of oil on the breeding of piglets and fattening pigs is mostly concentrated on commercial pig breeds.

[0004] This is a big gap in this field. Summary of the Invention

[0005] The purpose of the present invention is to provide a mixed additive for increasing the growth rate of local pigs. The additive is compounded with different oils and fats, making it particularly suitable for the growth of local pigs and having a significant promoting effect on the intramuscular fat content of local pigs.

[0006] The specific scheme of the present invention is:

[0007] A mixed additive for promoting the growth rate of local pigs, comprising a black soldier fly oil extract and a compound oil;

[0008] The compound oil is composed of soybean oil, palm kernel oil, linseed oil, palm oil, rapeseed oil, soybean lecithin oil and lysolecithin;

[0009] The weight ratio of the black soldier fly oil extract, soybean oil, palm kernel oil, linseed oil, palm oil, rapeseed oil, soybean lecithin and lysolecithin is 1-5:50-70:5-10:5-10:1-5:5-10:5-10:1-5.

[0010] The mixed additive of the present invention is a mixed oil, which is a mixture of oils and fats that has both growth promotion and intestinal immunity improvement effects;

[0011] According to the existing data, in pig farming, an n-6 / n-3 ratio between 1:1 and 5:1 can optimize growth efficiency and feed conversion rate;

[0012] After calculation, the ratio of n-6 / n-3 in the oil mixture is approximately 4:1; this ratio of unsaturated fatty acids is specifically developed for local pigs, and has multiple functions such as promoting growth, assisting intestinal immunity, and increasing intramuscular fat content.

[0013] In the above-mentioned mixed additive, the weight ratio of the black soldier fly oil extract, soybean oil, palm kernel oil, linseed oil, palm oil, rapeseed oil, soybean lecithin oil and lysolecithin is: 3-5:60-70:6-8:6-8:1-3:7-10:7-10:1-3.

[0014] At the same time, the invention also discloses the application of the mixed additive in preparing pig feed.

[0015] In the above application, the pig feed is a pig feed used to increase the growth rate of pigs.

[0016] Finally, the present invention also discloses a pig feed containing the mixed additive mentioned above.

[0017] The beneficial effects of this application are:

[0018] The ratio of n-6 / n-3 in the mixed additive of the present invention is 4:1; this ratio of unsaturated fatty acids is specifically developed for local pigs, and has multiple functions of promoting growth, assisting intestinal immunity, and increasing intramuscular fat content. This conclusion has been further confirmed through breeding experiments. DETAILED DESCRIPTION

[0019] The present invention will be described clearly and completely below in conjunction with the examples of the present invention. In the description of the present invention, it should be noted that, where specific conditions are not specified in the examples, conventional conditions or conditions recommended by the manufacturer were used. Reagents or instruments used where the manufacturer is not specified are conventional products that can be purchased commercially.

[0020] The preparation of black soldier fly oil extract refers to the applicant's prior application: CN115299526B A piglet feed and Example 1 of CN202110218005.1.

[0021] Experimental methods:

[0022] Pig breeds are: Yuedong black pig;

[0023] Experimental grouping: In a certain farm, 120-day-old Yuedong black pigs were divided into 4 experimental groups and 1 control group; each group was divided into 4 replicates, with 5 Yuedong black pigs in each replicate, for a total of 100 Yuedong black pigs;

[0024] Experimental group 1 used Grease 1; experimental group 2 used Grease 2; experimental group 3 used Grease 3; and experimental group 4 used Grease 4.

[0025] The breeding method is as follows: 100 120-day-old Yuedong Black pigs were selected from a farm and divided into four experimental groups and one control group. Each group had four replicates, with five Yuedong Black pigs in each replicate, for a total of 100 pigs, which were allocated to 20 pens (one pen per replicate). All pigs were raised in a pig house with a temperature of 18-22°C, a humidity of 65%-75%, good ventilation, and clean water. They were fed the same diet from the same batch throughout the entire breeding process. The experimental groups were fed diets supplemented with different proportions of the oil mixture, while the control group was fed diets without the oil mixture. All pigs were fed twice daily. The pig house and each pen facility were cleaned and disinfected once or twice a week. The breeding cycle was fixed at 150 days.

[0026] Refer to Table 1 below for the daily diet feed;

[0027] Table 1 Dietary feed composition and nutritional information

[0028] Element Content / Range Element Content / Range Crude protein%≥ 17 Crude fiber %≤ 7.5 Lysine%≥ 0.9 Total phosphorus % ≥ 0.45 calcium% 0.5～1.0 Crude ash %≤ 7.5 Sodium chloride% 0.3～0.8 Moisture%≤ 14.0

[0029] The four experimental groups were supplemented with 1% of the oil mixture shown in Table 2 in the diet feed;

[0030] Table 2 Composition of oils and fats

[0031]

[0032] The experimental results can be found in Table 3;

[0033] Table 3 Growth performance results statistics

[0034] Group Intramuscular fat content (%) Average initial weight (kg) Average final weight (kg) Average growth rate (g / d) Blank group 3.17±0.09 36.9±1.22 94.4±2.02 383.3±15.7 Experimental Group 1 3.50±0.12 36.0±1.37 96.5±1.88 403.3±15.5 Experimental Group 2 3.45±0.10 38.8±1.27 99.5±1.75 404.7±14.4 Experimental Group 3 3.27±0.08 37.1±1.11 96.7±2.01 397.3±15.3 Experimental Group 4 3.28±0.11 38.1±1.05 97.5±1.90 396.0±14.5

[0035] Result analysis:

[0036] 1. In the present invention, except for oil 3, the ratio of n-6 / n-3 of other oils is between 3.5 and 4.5;

[0037] Through experimental groups 1, 3, and 4, it can be seen that whether the black soldier fly oil extract alone or the compound plant oil is used, it has a promoting effect on the growth performance of Yuedong black pigs; in terms of improving intramuscular fat, the effect of the compound plant oil is more obvious;

[0038] The data from experimental group 1 show that when black soldier fly oil extract and compound plant oil are used in combination, it has the dual effects of promoting growth and improving intramuscular fat.

[0039] 2. By comparing experimental groups 1 and 2, it can be seen that the difference in the n-6 / n-3 ratio between the two is about 0.5. However, experimental group 2 lacks palm oil and hemolysed lecithin. Its growth performance is similar to that of experimental group 1, but its intramuscular fat content is more similar to that of experimental group 4. This shows that when black soldier fly oil extract and compound plant oil are used in combination, palm oil and hemolysed lecithin play a more core role.

[0040] The above experiments show that the use of different oil combinations can significantly improve the growth performance and intramuscular fat content of native pigs, further improving the breeding efficiency and flavor of native pigs.

Claims

1. A mixed additive for promoting the growth rate of local pigs, characterized in that: Including black soldier fly oil extract, compound oil; The compound oil is composed of soybean oil, palm kernel oil, linseed oil, palm oil, rapeseed oil, soybean lecithin oil and lysolecithin; The weight ratio of the black soldier fly oil extract, soybean oil, palm kernel oil, linseed oil, palm oil, rapeseed oil, soybean lecithin and lysolecithin is 1-5:50-70:5-10:5-10:1-5:5-10:5-10:1-5.

2. The mixed additive according to claim 1, characterized in that The weight ratio of the black soldier fly oil extract, soybean oil, palm kernel oil, linseed oil, palm oil, rapeseed oil, soybean lecithin oil and lysolecithin is: 3-5:60-70:6-8:6-8:1-3:7-10:7-10:1-3.

3. Use of the mixed additive according to claim 1 or 2 in preparing pig feed.

4. The use according to claim 3, characterized in that The pig feed is a pig feed used to increase the growth rate of pigs.

5. A pig feed, characterized in that: Contains the mixed additive according to claim 1 or 2.

Images