Suckling pig concentrated feed capable of improving growth performance and production process of suckling pig concentrated feed

Abstract

The invention relates to a suckling pig concentrate feed for improving growth performance and a production process thereof, and belongs to the technical field of pig feed. The suckling pig concentrated feed provided by the invention comprises the following raw materials: soybean meal, corn flour, fish meal, resistant starch, capsules, a compound premix and monocalcium phosphate, and the use of the capsules can effectively maintain intestinal health of suckling pigs, so that the utilization rate of the concentrated feed is improved, and the capsules cooperate with other raw materials to provide diversified nutrition supply for the suckling pigs; therefore, the growth performance of the suckling pigs is effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of pig feed, and relates to a suckling pig concentrated feed for improving growth performance and a production process thereof. Background Art

[0002] Suckling pig concentrate is a special feed for the growing stage of suckling pigs. It usually contains high-quality protein, energy, vitamins, minerals and other nutrients. Therefore, it has been widely used in breeding production. However, the nutritional ratio of some suckling pig concentrates is not scientific enough, which may lead to problems such as slow growth and low immunity of suckling pigs during the production process. In addition, suckling pigs are prone to digestive system problems such as diarrhea after weaning, and the formula of some concentrates is not effective in regulating intestinal flora and cannot effectively prevent this phenomenon. Summary of the invention

[0003] The object of the present invention is to provide a suckling pig concentrated feed for improving growth performance and a production process thereof. The raw materials of the suckling pig concentrated feed of the present invention include soybean meal, corn meal, fish meal, resistant starch, capsules, compound premixes and dicalcium phosphate. The use of the capsules can effectively maintain the intestinal health of the suckling pigs, thereby improving the utilization rate of the concentrated feed, and cooperating with other raw materials to provide a diversified nutritional supply for the suckling pigs, thereby effectively improving the growth performance of the suckling pigs.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A suckling pig concentrated feed for improving growth performance. The raw materials of the suckling pig concentrated feed include, by weight, 34-36 parts of soybean meal, 27-29 parts of corn flour, 7.5-8.5 parts of fish meal, 10-14 parts of resistant starch, 1.2-1.3 parts of capsules, 12.1-12.5 parts of composite premixes, and 1.45-1.55 parts of monocalcium phosphate.

[0006] Furthermore, the preparation method of the capsule comprises the following steps:

[0007] Step Y1: Add the composite probiotics into PBS buffer and stir evenly at 50-70 rpm to obtain a concentration of 0.9-1.1×10 10 CFU / mL of probiotic suspension;

[0008] Step Y2, after mixing sodium alginate and deionized water, stirring at 45° C. and 295-305 rpm for 20-30 min to obtain a sodium alginate solution with a sodium alginate content of 1.7-1.9 wt %;

[0009] Step Y3, dripping the probiotic suspension into the sodium alginate solution at a rate of 2-3 drops / s, stirring at a speed of 450-550 rpm to obtain a suspension, dripping the suspension into the calcium chloride solution at a rate of 0.5-1.5 drops / s, stirring at a speed of 350-450 rpm, filtering through a 300-mesh filter cloth after the dripping is completed, washing the precipitate with deionized water, draining, and standing at 30° C. for 30 minutes to obtain a primary encapsulation product;

[0010] Step Y4, mixing citrus pectin and deionized water, stirring at 45° C. and 280-320 rpm until the citrus pectin is completely dissolved, to prepare a citrus pectin solution having a citrus pectin content of 4.3-4.7 wt %;

[0011] Step Y5, using deionized water as a solution, preparing a gelatin solution with a gelatin content of 6.5-7.5wt% and a gum arabic solution with a gum arabic content of 4.5-5.5wt% at 50°C and 380-420rpm, mixing the gelatin solution and the gum arabic solution in a volume ratio of 1.3-1.5:0.8-1, and stirring at 300-310rpm for 15-20min to obtain a wall material liquid;

[0012] Step Y6, adding the primary encapsulation product to the citrus pectin solution, stirring at 260-300 rpm for 10-20 min to obtain a mixed solution, adding the mixed solution to the wall material solution, ultrasonicating for 4-8 min, and freeze-drying to obtain the product.

[0013] Furthermore, the composite probiotics in step Y1 are composed of bifidobacterium, Lactobacillus acidophilus and Lactobacillus plantarum in a mass ratio of 0.95-1.05:0.8-0.9:0.4-0.5; and the concentration of the PBS buffer is 0.1-0.2 mol / L.

[0014] Furthermore, in step Y3, the mass ratio of the probiotic suspension to the sodium alginate solution is 1:2.1-2.3; the mass ratio of the suspension to the calcium chloride solution is 1:6.3-6.7; and the concentration of the calcium chloride solution is 0.25-0.35 mol / L.

[0015] Furthermore, in step Y6, the mass ratio of the primary encapsulation product to the citrus pectin solution is 1:1.5-2; the mass ratio of the mixed solution to the wall material solution is 1:5-8.

[0016] Furthermore, the ultrasonic parameters in step Y6 are: ultrasonic temperature is 45°C, ultrasonic frequency is 20-30kHz, and ultrasonic power is 100-200W.

[0017] Furthermore, the freeze-drying in step Y6 is to pre-freeze at -40°C for 4-12 hours, then heat to 20°C for 18-40 hours, and finally treat at 30°C for 12-24 hours.

[0018] Furthermore, the raw materials of the composite premix include, by weight, 71-72 parts of corn cob powder, 1.3-1.7 parts of vitamin A, 1.9-2.1 parts of vitamin E, 2.4-2.6 parts of coated vitamin C, 0.02-0.04 parts of vitamin D3, 0.5-0.6 parts of niacinamide, 1-1.2 parts of ferrous glycinate, 1-1.4 parts of zinc methionine, 0.04-0.06 parts of sodium selenite, 0.7-0.9 parts of Bacillus subtilis, 0.25-0.35 parts of oregano essential oil, 0.75-0.85 parts of monocalcium phosphate, and 0.5-0.8 parts of calcium carbonate.

[0019] Furthermore, the production process of the suckling pig concentrate comprises the following steps:

[0020] Step X, sequentially add soybean meal, corn meal, fish meal and resistant starch into a mixer, stir at a speed of 50-60 rpm for 8-12 min, add the composite premix and calcium dihydrogen phosphate, adjust the speed to 40-50 rpm and stir for 4-5 min, finally add the capsule, adjust the speed to 30-40 rpm and stir for 2-3 min, then steam condition, granulate and dry to obtain.

[0021] Beneficial effects of the present invention:

[0022] (1) The present invention provides a capsule, which first uses sodium alginate and calcium chloride to cross-link to form a gel network to obtain a primary encapsulation product, which effectively encapsulates the composite probiotics and improves the retention rate of the probiotics; on this basis, the primary encapsulation product and citrus pectin solution are mixed as the content. Citrus pectin, as a water-soluble dietary fiber, can absorb water and swell to form a gelatinous substance, promote intestinal peristalsis, and can be used as a nutrient for probiotics after entering the intestine, by promoting the growth of probiotics and the production of short-chain fatty acids. The wall material liquid obtained by mixing the gelatin solution and the gum arabic solution forms a composite film after drying, which can be formed into a capsule with a stable structure through double-layer coating, effectively protecting the probiotic components from being degraded prematurely, synergistically maintaining the intestinal health of suckling pigs, reducing the risk of diarrhea, and thus improving the utilization rate of concentrated feed.

[0023] (2) The present invention provides a diversified nutritional supply for suckling pigs through the synergistic effect of soybean meal, corn meal, fish meal, resistant starch, capsules, composite premix and monocalcium phosphate, thereby effectively improving the growth performance of suckling pigs. DETAILED DESCRIPTION

[0024] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in combination with the embodiments.

[0025] The soybean meal and fish meal in all the embodiments and comparative examples of the present invention are purchased directly from the market, and are purchased from Jinan Shuangshi Environmental Technology Co., Ltd.; the corn flour is purchased directly from the market, and is purchased from Shandong Wanhang Biotechnology Co., Ltd.; the resistant starch, ferrous glycine, zinc methionine, and sodium selenite are purchased directly from the market, and are purchased from Jiangsu Duoyang Bioengineering Technology Co., Ltd.; the bifidobacterium is Bifidobacterium longum, and the strain preservation number is CICC 6207; Lactobacillus acidophilus, Lactobacillus plantarum, and Bacillus subtilis were all purchased directly from the market, all purchased from Shandong Yihao Biotechnology Co., Ltd.; PBS buffer was purchased directly from the market, all purchased from Sigma-Aldrich (Shanghai) Trading Co., Ltd.; sodium alginate was purchased directly from the market, all purchased from Shanghai Quanyan Biotechnology Co., Ltd.; calcium chloride, Shouguang Zexiang Chemical Co., Ltd.; citrus pectin, gelatin, and gum arabic were all purchased directly from the market, all purchased from Jiangsu Caiwei Biotechnology Co., Ltd.; corn cob powder was purchased directly from the market, all purchased from Gaotang County Yide Agriculture and Animal Husbandry Co., Ltd.; vitamin A, vitamin E, coated vitamin C, vitamin D3, and niacinamide were all purchased directly from the market, all purchased from Hebei Tuohai Biotechnology Co., Ltd.; oregano essential oil, Hubei Xinyuhong Biomedical Technology Co., Ltd.; calcium dihydrogen phosphate was purchased directly from the market, all purchased from Shandong Anquan Chemical Technology Co., Ltd.; calcium carbonate was purchased directly from the market, all purchased from Shanghai Pangda Biotechnology Co., Ltd.

[0026] Example 1

[0027] A suckling pig concentrate for improving growth performance. The raw materials of the suckling pig concentrate in this embodiment include, by weight, 34 parts of soybean meal, 27 parts of corn flour, 7.5 parts of fish meal, 10 parts of resistant starch, 1.2 parts of capsules, 12.1 parts of composite premix, and 1.45 parts of monocalcium phosphate.

[0028] The preparation method of the capsule of this embodiment comprises the following steps:

[0029] Step Y1: Add the composite probiotics into PBS buffer and stir evenly at 50 rpm to obtain a concentration of 0.9×10 10 CFU / mL of probiotic suspension;

[0030] Step Y2, after mixing sodium alginate and deionized water, stirring at 45° C. and 295 rpm for 20 min to obtain a sodium alginate solution with a sodium alginate content of 1.7 wt %;

[0031] Step Y3, dripping the probiotic suspension into the sodium alginate solution at a rate of 2 drops / s, stirring at 450 rpm to obtain a suspension, dripping the suspension into the calcium chloride solution at a rate of 0.5 drops / s, stirring at 350 rpm, filtering through a 300-mesh filter cloth after the dripping is completed, washing the precipitate with deionized water, draining, and standing at 30° C. for 30 minutes to obtain a primary encapsulation product;

[0032] Step Y4, mixing citrus pectin and deionized water, stirring at 45° C. and 280 rpm until the citrus pectin is completely dissolved, to prepare a citrus pectin solution with a citrus pectin content of 4.3 wt %;

[0033] Step Y5, using deionized water as a solution, preparing a gelatin solution with a gelatin content of 6.5 wt% and a gum arabic solution with a gum arabic content of 4.5 wt% at 50° C. and 380 rpm, mixing the gelatin solution and the gum arabic solution in a volume ratio of 1.3:0.8, and stirring at 300 rpm for 15 min to obtain a wall material liquid;

[0034] Step Y6, adding the primary encapsulation product to the citrus pectin solution, stirring at 260 rpm for 10 min to obtain a mixed solution, adding the mixed solution to the wall material solution, ultrasonicating for 4 min, and freeze-drying to obtain the product.

[0035] The composite probiotics in step Y1 of this embodiment are composed of Bifidobacterium, Lactobacillus acidophilus and Lactobacillus plantarum in a mass ratio of 0.95:0.8:0.4; and the concentration of PBS buffer is 0.1 mol / L.

[0036] In step Y3 of this embodiment, the mass ratio of the probiotic suspension to the sodium alginate solution is 1:2.1; the mass ratio of the suspension to the calcium chloride solution is 1:6.3; and the concentration of the calcium chloride solution is 0.25 mol / L.

[0037] The mass ratio of the primary encapsulation product to the citrus pectin solution in step Y6 of this embodiment is 1:1.5; the mass ratio of the mixed solution to the wall material solution is 1:5.

[0038] The ultrasonic parameters in step Y6 are: ultrasonic temperature is 45°C, ultrasonic frequency is 20kHz, and ultrasonic power is 100W.

[0039] The freeze drying in step Y6 of this embodiment is to pre-freeze at -40°C for 4-12 hours, then heat to 20°C for 18 hours, and finally treat at 30°C for 12 hours.

[0040] The raw materials of the composite premix of this embodiment include, by weight, 71 parts of corn cob powder, 1.3 parts of vitamin A, 1.9 parts of vitamin E, 2.4 parts of coated vitamin C, 0.02 parts of vitamin D3, 0.5 parts of niacinamide, 1 part of ferrous glycine, 1 part of zinc methionine, 0.04 parts of sodium selenite, 0.7 parts of Bacillus subtilis, 0.25 parts of oregano essential oil, 0.75 parts of monocalcium phosphate, and 0.5 parts of calcium carbonate.

[0041] The production process of suckling pig concentrate in this embodiment comprises the following steps:

[0042] Step X, sequentially add soybean meal, corn meal, fish meal and resistant starch into a mixer, stir at 50 rpm for 8 min, add the composite premix and calcium dihydrogen phosphate, adjust the speed to 40 rpm and stir for 4 min, finally add the capsule, adjust the speed to 30 rpm and stir for 2 min, then steam condition, granulate and dry to obtain.

[0043] Example 2

[0044] A suckling pig concentrate for improving growth performance. The raw materials of the suckling pig concentrate in this embodiment include, by weight, 36 parts of soybean meal, 29 parts of corn flour, 8.5 parts of fish meal, 14 parts of resistant starch, 1.3 parts of capsules, 12.5 parts of composite premix, and 1.55 parts of monocalcium phosphate.

[0045] The preparation method of the capsule of this embodiment comprises the following steps:

[0046] Step Y1: Add the composite probiotics into PBS buffer and stir evenly at 70 rpm to obtain a concentration of 1.1×10 10 CFU / mL of probiotic suspension;

[0047] Step Y2, after mixing sodium alginate and deionized water, stirring at 45° C. and 305 rpm for 30 min to obtain a sodium alginate solution with a sodium alginate content of 1.9 wt %;

[0048] Step Y3, dripping the probiotic suspension into the sodium alginate solution at a rate of 3 drops / s, stirring at a speed of 550 rpm to obtain a suspension, dripping the suspension into the calcium chloride solution at a rate of 1.5 drops / s, stirring at a speed of 450 rpm, filtering through a 300-mesh filter cloth after the dripping is completed, washing the precipitate with deionized water, draining, and standing at 30° C. for 30 minutes to obtain a primary encapsulation product;

[0049] Step Y4, mixing citrus pectin and deionized water, stirring at 45° C. and 320 rpm until the citrus pectin is completely dissolved, to prepare a citrus pectin solution with a citrus pectin content of 4.7 wt %;

[0050] Step Y5, using deionized water as a solution, preparing a gelatin solution with a gelatin content of 7.5 wt% and a gum arabic solution with a gum arabic content of 5.5 wt% at 50° C. and 420 rpm, mixing the gelatin solution and the gum arabic solution in a volume ratio of 1.5:1, and stirring at 310 rpm for 20 min to obtain a wall material liquid;

[0051] Step Y6: add the primary encapsulation product to the citrus pectin solution, stir at 300 rpm for 20 min to obtain a mixed solution, add the mixed solution to the wall material solution, ultrasonicate for 8 min, and freeze-dry to obtain the product.

[0052] The composite probiotics in step Y1 of this embodiment are composed of Bifidobacterium, Lactobacillus acidophilus and Lactobacillus plantarum in a mass ratio of 1.05:0.9:0.5; and the concentration of PBS buffer is 0.2 mol / L.

[0053] In step Y3 of this embodiment, the mass ratio of the probiotic suspension to the sodium alginate solution is 1:2.3; the mass ratio of the suspension to the calcium chloride solution is 1:6.7; and the concentration of the calcium chloride solution is 0.35 mol / L.

[0054] The mass ratio of the primary encapsulation product to the citrus pectin solution in step Y6 of this embodiment is 1:2; the mass ratio of the mixed solution to the wall material solution is 1:8.

[0055] The ultrasonic parameters in step Y6 of this embodiment are: ultrasonic temperature is 45°C, ultrasonic frequency is 30kHz, and ultrasonic power is 200W.

[0056] The freeze drying in step Y6 of this embodiment is to pre-freeze at -40°C for 12 hours, then heat to 20°C for 40 hours, and finally treat at 30°C for 24 hours.

[0057] The raw materials of the composite premix of this embodiment include, by weight, 72 parts of corn cob powder, 1.7 parts of vitamin A, 2.1 parts of vitamin E, 2.6 parts of coated vitamin C, 0.04 parts of vitamin D3, 0.6 parts of niacinamide, 1.2 parts of ferrous glycinate, 1.4 parts of zinc methionine, 0.06 parts of sodium selenite, 0.9 parts of Bacillus subtilis, 0.35 parts of oregano essential oil, 0.85 parts of monocalcium phosphate, and 0.8 parts of calcium carbonate.

[0058] The production process of suckling pig concentrate in this embodiment comprises the following steps:

[0059] Step X, sequentially add soybean meal, corn meal, fish meal and resistant starch into a mixer, stir at 60 rpm for 12 min, add the composite premix and calcium dihydrogen phosphate, adjust the speed to 50 rpm and stir for 5 min, finally add the capsule, adjust the speed to 40 rpm and stir for 3 min, then steam condition, granulate and dry to obtain.

[0060] Example 3

[0061] A suckling pig concentrate for improving growth performance. The raw materials of the suckling pig concentrate in this embodiment include, by weight, 35 parts of soybean meal, 28 parts of corn flour, 8 parts of fish meal, 12 parts of resistant starch, 1.25 parts of capsules, 12.3 parts of composite premix, and 1.5 parts of monocalcium phosphate.

[0062] The preparation method of the capsule of this embodiment comprises the following steps:

[0063] Step Y1: Add the composite probiotics into PBS buffer and stir evenly at 60 rpm to obtain a concentration of 1×10 10 CFU / mL of probiotic suspension;

[0064] Step Y2, after mixing sodium alginate and deionized water, stirring at 45° C. and 300 rpm for 25 min to obtain a sodium alginate solution with a sodium alginate content of 1.8 wt %;

[0065] Step Y3, dripping the probiotic suspension into the sodium alginate solution at a rate of 2.5 drops / s, stirring at a speed of 500 rpm to obtain a suspension, dripping the suspension into the calcium chloride solution at a rate of 1 drop / s, stirring at a speed of 400 rpm, filtering through a 300-mesh filter cloth after the dripping is completed, washing the precipitate with deionized water, draining, and standing at 30° C. for 30 minutes to obtain a primary encapsulation product;

[0066] Step Y4, mixing citrus pectin and deionized water, stirring at 45° C. and 300 rpm until the citrus pectin is completely dissolved, to prepare a citrus pectin solution having a citrus pectin content of 4.5 wt %;

[0067] Step Y5, using deionized water as a solution, preparing a gelatin solution with a gelatin content of 7 wt% and a gum arabic solution with a gum arabic content of 5 wt% at 50° C. and 400 rpm, respectively, mixing the gelatin solution and the gum arabic solution in a volume ratio of 1.4:0.9, and stirring at 305 rpm for 17.5 min to obtain a wall material liquid;

[0068] Step Y6, adding the primary encapsulation product to the citrus pectin solution, stirring at 280 rpm for 15 minutes to obtain a mixed solution, adding the mixed solution to the wall material solution, ultrasonicating for 6 minutes, and freeze-drying to obtain the product.

[0069] The composite probiotics in step Y1 of this embodiment are composed of Bifidobacterium, Lactobacillus acidophilus and Lactobacillus plantarum in a mass ratio of 1:0.85:0.45; the concentration of PBS buffer is 0.15 mol / L.

[0070] In step Y3 of this embodiment, the mass ratio of the probiotic suspension to the sodium alginate solution is 1:2.2; the mass ratio of the suspension to the calcium chloride solution is 1:6.5; and the concentration of the calcium chloride solution is 0.3 mol / L.

[0071] The mass ratio of the primary encapsulation product to the citrus pectin solution in step Y6 of this embodiment is 1:1.75; the mass ratio of the mixed solution to the wall material solution is 1:6.5.

[0072] The ultrasonic parameters in step Y6 of this embodiment are: ultrasonic temperature is 45°C, ultrasonic frequency is 25kHz, and ultrasonic power is 150W.

[0073] The freeze drying in step Y6 of this embodiment is to pre-freeze at -40°C for 8 hours, then heat to 20°C for 29 hours, and finally treat at 30°C for 18 hours.

[0074] The raw materials of the composite premix of this embodiment include, by weight, 71.5 parts of corn cob powder, 1.5 parts of vitamin A, 2 parts of vitamin E, 2.5 parts of coated vitamin C, 0.03 parts of vitamin D3, 0.55 parts of niacinamide, 1.1 parts of ferrous glycinate, 1.2 parts of zinc methionine, 0.05 parts of sodium selenite, 0.8 parts of Bacillus subtilis, 0.3 parts of oregano essential oil, 0.8 parts of monocalcium phosphate, and 0.65 parts of calcium carbonate.

[0075] The production process of suckling pig concentrate in this embodiment comprises the following steps:

[0076] Step X, sequentially add soybean meal, corn meal, fish meal and resistant starch into a mixer, stir at 55 rpm for 10 min, add the composite premix and calcium dihydrogen phosphate, adjust the speed to 45 rpm and stir for 4.5 min, finally add the capsule, adjust the speed to 35 rpm and stir for 2.5 min, then steam condition, granulate and dry to obtain.

[0077] Comparative Example 1

[0078] On the basis of Example 3, the capsules were removed and replaced with an equal weight of composite probiotics, and other conditions remained the same as in Example 3.

[0079] Comparative Example 2

[0080] On the basis of Example 3, the Bifidobacterium in the composite probiotics was removed and replaced with an equal weight of Lactobacillus acidophilus, and other conditions remained the same as in Example 3.

[0081] Comparative Example 3

[0082] On the basis of Example 3, Lactobacillus acidophilus in the composite probiotics was removed and replaced with Lactobacillus plantarum of equal weight, and other conditions remained consistent with Example 3.

[0083] Comparative Example 4

[0084] On the basis of Example 3, Lactobacillus plantarum in the composite probiotics was removed and replaced with an equal weight of Bifidobacterium, and other conditions remained the same as in Example 3.

[0085] Comparative Example 5

[0086] On the basis of Example 3, keeping other conditions the same, the preparation method of the capsule is changed to the following steps:

[0087] Step Y1: Add the composite probiotics into PBS buffer and stir evenly at 60 rpm to obtain a concentration of 1×10 10 CFU / mL of probiotic suspension;

[0088] Step Y2, after mixing sodium alginate and deionized water, stirring at 45° C. and 300 rpm for 25 min to obtain a sodium alginate solution with a sodium alginate content of 1.8 wt %;

[0089] Step Y3, dripping the probiotic suspension into the sodium alginate solution at a rate of 2.5 drops / s, stirring at a speed of 500 rpm to obtain a suspension, dripping the suspension into the calcium chloride solution at a rate of 1 drop / s, stirring at a speed of 400 rpm, filtering through a 300-mesh filter cloth after the dripping is completed, washing the precipitate with deionized water, draining, and standing at 30° C. for 30 minutes to obtain a primary encapsulation product;

[0090] Step Y4, using deionized water as a solution, preparing a gelatin solution with a gelatin content of 7 wt% and a gum arabic solution with a gum arabic content of 5 wt% at 50° C. and 400 rpm, mixing the gelatin solution and the gum arabic solution in a volume ratio of 1.4:0.9, and stirring at 305 rpm for 17.5 min to obtain a wall material liquid;

[0091] Step Y5, adding the primary encapsulation product to the wall material liquid, with the mass ratio of the primary encapsulation product to the wall material liquid being 1:6.5, ultrasonicating for 6 minutes, and freeze-drying to obtain the product.

[0092] Comparative Example 6

[0093] On the basis of Example 3, keeping other conditions the same, the preparation method of the capsule is changed to the following steps:

[0094] Step Y1: Add the composite probiotics into PBS buffer and stir evenly at 60 rpm to obtain a concentration of 1×10 10 CFU / mL of probiotic suspension;

[0095] Step Y2, after mixing sodium alginate and deionized water, stirring at 45° C. and 300 rpm for 25 min to obtain a sodium alginate solution with a sodium alginate content of 1.8 wt %;

[0096] Step Y3, drop the probiotic suspension into the sodium alginate solution at a rate of 2.5 drops / s, stir evenly at a speed of 500 rpm to obtain a suspension, drop the suspension into the calcium chloride solution at a rate of 1 drop / s, stir evenly at a speed of 400 rpm, pass through a 300-mesh filter cloth after the dropwise addition is completed, rinse the precipitate with deionized water, drain, and stand at 30°C for 30 minutes to solidify.

[0097] Comparative Example 7

[0098] On the basis of Example 3, keeping other conditions the same, the preparation method of the capsule is changed to the following steps:

[0099] Step Y1: Add the composite probiotics into PBS buffer and stir evenly at 60 rpm to obtain a concentration of 1×10 10 CFU / mL of probiotic suspension;

[0100] Step Y2, using deionized water as a solution, preparing a gelatin solution with a gelatin content of 7 wt% and a gum arabic solution with a gum arabic content of 5 wt% at 50° C. and 400 rpm, mixing the gelatin solution and the gum arabic solution in a volume ratio of 1.4:0.9, and stirring at 305 rpm for 17.5 min to obtain a wall material liquid;

[0101] Step Y3, adding the probiotic suspension to the wall material liquid, with the mass ratio of the probiotic suspension to the wall material liquid being 1:6.5, ultrasonicating for 6 minutes, and freeze-drying to obtain the product.

[0102] 30 healthy weaned piglets at 28 days of age, weighing 7.5±0.1 kg, were randomly divided into 10 groups, and the piglet concentrate prepared in Examples 1-3 and Comparative Examples 1-7 was used as a sample. Dry feeding was adopted during the test period, during which the piglets were free to eat and drink water. The sample was fed 3 times a day at 6:00, 12:00, and 18:00. Each feeding was best to eat until the piglets were full and had little leftovers. The sty was kept ventilated for a long time, and the sty was cleaned regularly. The test period was 20 days.

[0103] Before the start of the experiment, the weight of each suckling pig, i.e., the initial weight, was recorded. After the experiment, the suckling pigs in the fasting state were weighed, i.e., the final weight. The average daily feed intake (kg), average daily weight gain (kg) and feed-to-weight ratio of each group of suckling pigs were calculated, wherein, average daily feed intake = (final weight - initial weight) / number of experimental days, average daily weight gain = total feed consumption / number of experimental days, feed-to-weight ratio = average daily feed intake / average daily weight gain, and the results were recorded as the average value in Table 1 below.

[0104] Table 1

[0105] Average daily feed intake / kg Average daily weight gain / kg Material weight ratio Example 1 0.673 0.488 1.38 Example 2 0.677 0.494 1.37 Example 3 0.676 0.501 1.35 Comparative Example 1 0.675 0.453 1.49 Comparative Example 2 0.678 0.481 1.41 Comparative Example 3 0.672 0.473 1.42 Comparative Example 4 0.676 0.479 1.41 Comparative Example 5 0.677 0.467 1.45 Comparative Example 6 0.674 0.459 1.47 Comparative Example 7 0.675 0.462 1.46

[0106] As can be seen from Table 1, the suckling pig concentrated feed prepared in Examples 1-3 of the present invention can effectively maintain the intestinal health of suckling pigs, thereby improving the utilization rate of the concentrated feed, and coordinating with other raw materials to provide a diversified nutritional supply for suckling pigs, thereby effectively improving the growth performance of suckling pigs.

[0107] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any indirect modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A suckling pig concentrate for improving growth performance, characterized in that: The raw materials of the suckling pig concentrated feed include, by weight, 34-36 parts of soybean meal, 27-29 parts of corn flour, 7.5-8.5 parts of fish meal, 10-14 parts of resistant starch, 1.2-1.3 parts of capsules, 12.1-12.5 parts of composite premix, and 1.45-1.55 parts of monocalcium phosphate.

2. The suckling pig concentrate for improving growth performance according to claim 1, characterized in that: The preparation method of the capsule comprises the following steps: Step Y1: Add the composite probiotics into PBS buffer and stir evenly at 50-70 rpm to obtain a concentration of 0.9-1.1×10 10 CFU / mL of probiotic suspension; Step Y2, after mixing sodium alginate and deionized water, stirring at 45° C. and 295-305 rpm for 20-30 min to obtain a sodium alginate solution with a sodium alginate content of 1.7-1.9 wt %; Step Y3, dripping the probiotic suspension into the sodium alginate solution at a rate of 2-3 drops / s, stirring at a speed of 450-550 rpm to obtain a suspension, dripping the suspension into the calcium chloride solution at a rate of 0.5-1.5 drops / s, stirring at a speed of 350-450 rpm, filtering through a 300-mesh filter cloth after the dripping is completed, washing the precipitate with deionized water, draining, and standing at 30° C. for 30 minutes to obtain a primary encapsulation product; Step Y4, mixing citrus pectin and deionized water, stirring at 45° C. and 280-320 rpm until the citrus pectin is completely dissolved, to prepare a citrus pectin solution having a citrus pectin content of 4.3-4.7 wt %; Step Y5, using deionized water as a solution, preparing a gelatin solution with a gelatin content of 6.5-7.5wt% and a gum arabic solution with a gum arabic content of 4.5-5.5wt% at 50°C and 380-420rpm, mixing the gelatin solution and the gum arabic solution in a volume ratio of 1.3-1.5:0.8-1, and stirring at 300-310rpm for 15-20min to obtain a wall material liquid; Step Y6, adding the primary encapsulation product to the citrus pectin solution, stirring at 260-300 rpm for 10-20 min to obtain a mixed solution, adding the mixed solution to the wall material solution, ultrasonicating for 4-8 min, and freeze-drying to obtain the product.

3. The suckling pig concentrate for improving growth performance according to claim 2, characterized in that: In step Y1, the composite probiotics are composed of bifidobacterium, Lactobacillus acidophilus and Lactobacillus plantarum in a mass ratio of 0.95-1.05:0.8-0.9:0.4-0.5; and the concentration of the PBS buffer is 0.1-0.2 mol / L.

4. The suckling pig concentrate for improving growth performance according to claim 2, characterized in that: In step Y3, the mass ratio of the probiotic suspension to the sodium alginate solution is 1:2.1-2.3; the mass ratio of the suspension to the calcium chloride solution is 1:6.3-6.7; and the concentration of the calcium chloride solution is 0.25-0.35 mol / L.

5. The suckling pig concentrate for improving growth performance according to claim 2, characterized in that: In step Y6, the mass ratio of the primary encapsulation product to the citrus pectin solution is 1:1.5-2; the mass ratio of the mixed solution to the wall material solution is 1:5-8.

6. The suckling pig concentrate for improving growth performance according to claim 2, characterized in that: The ultrasonic parameters in step Y6 are: ultrasonic temperature is 45°C, ultrasonic frequency is 20-30kHz, and ultrasonic power is 100-200W.

7. The suckling pig concentrate for improving growth performance according to claim 2, characterized in that: The freeze-drying in step Y6 is to pre-freeze at -40°C for 4-12 hours, then heat to 20°C for 18-40 hours, and finally treat at 30°C for 12-24 hours.

8. The suckling pig concentrate for improving growth performance according to claim 1, characterized in that: The raw materials of the composite premix include, by weight, 71-72 parts of corn cob powder, 1.3-1.7 parts of vitamin A, 1.9-2.1 parts of vitamin E, 2.4-2.6 parts of coated vitamin C, 0.02-0.04 parts of vitamin D3, 0.5-0.6 parts of nicotinamide, 1-1.2 parts of ferrous glycine, 1-1.4 parts of zinc methionine, 0.04-0.06 parts of sodium selenite, 0.7-0.9 parts of bacillus subtilis, 0.25-0.35 parts of oregano essential oil, 0.75-0.85 parts of monocalcium phosphate, and 0.5-0.8 parts of calcium carbonate.

9. A production process of a suckling pig concentrate for improving growth performance as claimed in claims 1 to 8, characterized in that: The production process of the suckling pig concentrate comprises the following steps: Step X, sequentially add soybean meal, corn meal, fish meal and resistant starch into a mixer, stir at a speed of 50-60 rpm for 8-12 min, add the composite premix and calcium dihydrogen phosphate, adjust the speed to 40-50 rpm and stir for 4-5 min, finally add the capsule, adjust the speed to 30-40 rpm and stir for 2-3 min, then steam condition, granulate and dry to obtain.