Livestock and poultry feed additive for saving feed and its preparation method and application

Abstract

The application relates to the technical field of feed additives, and particularly discloses a livestock and poultry grain-saving feed additive as well as a preparation method and application thereof. The livestock and poultry grain-saving feed additive provided by the application comprises the following components in parts by weight: L-lysine hydrochloride 1.5-3.5 parts, DL-methionine 0.8-2.2 parts, heat-resistant phytase 0.1-0.3 parts, sodium butyrate 0.5-1.5 parts, salvianolic acid C 0.03-0.1 part, plant extract 0.05-0.12 part and fermented soybean meal 80-120 parts; wherein the plant extract is selected from at least three kinds of thymol, cinnamaldehyde, hesperidin, delphinium extract and radix rubescens extract. The livestock and poultry grain-saving feed additive provided by the application can effectively improve feed conversion rate, reduce the nitrogen and phosphorus contents in excrement, reduce the methane and ammonia emissions of livestock and poultry, and has a good application prospect.

Description

Technical Field

[0001] This application relates to the field of feed additive technology, specifically to a feed additive for livestock and poultry that saves feed, its preparation method, and its application. Background Technology

[0002] As the scale of livestock and poultry farming continues to expand, feed costs and carbon emissions generated during the farming process are becoming increasingly prominent issues. Traditional feeds often rely on adding a large amount of soybean meal to ensure nutrition, but pigs, chickens, and other livestock and poultry do not have high digestibility and absorption efficiency for this type of high-protein feed, resulting in significant feed waste. The high nitrogen and phosphorus content in their manure not only affects growth performance but also generates large amounts of greenhouse gases such as methane and ammonia during intestinal fermentation and manure treatment, causing environmental pollution.

[0003] To address the aforementioned issues, existing technologies have proposed solutions such as reducing the proportion of crude protein in feed while supplementing with synthetic amino acids like lysine and methionine, or adding enzyme preparations, plant extracts, and other components. However, most of these solutions only address one aspect, such as simply improving digestibility or simply reducing ammonia emissions. They do not systematically solve the series of interconnected problems caused by low digestibility in livestock and poultry, including abnormal hindgut fermentation, increased methane and ammonia emissions, and higher feed conversion ratio.

[0004] Therefore, developing a feed additive that can effectively improve feed conversion rate, reduce nitrogen and phosphorus content in feces, reduce methane and ammonia emissions, and is safe and has readily available raw materials is of great practical significance for livestock and poultry farming. Summary of the Invention

[0005] In order to overcome the problems of low digestibility of livestock and poultry, high nitrogen and phosphorus content in feces, large methane and ammonia emissions, and high feed conversion ratio of existing feed additives, this application provides a feed additive for livestock and poultry, its preparation method and application.

[0006] This application provides a feed additive for livestock and poultry that saves feed weight, using the following technical solution: A feed additive for livestock and poultry that saves feed weight comprises the following components in parts by weight: 1.5-3.5 parts L-lysine hydrochloride, 0.8-2.2 parts DL-methionine, 0.1-0.3 parts heat-resistant phytase, 0.5-1.5 parts sodium butyrate, 0.03-0.1 parts salvianolic acid C, 0.05-0.12 parts plant extract, and 80-120 parts fermented soybean meal; The plant extract is selected from at least three of the following: thymol, cinnamaldehyde, hesperidin, sappan flower extract, and gromwell root extract.

[0007] This application discloses a feed additive for livestock and poultry that, through a specific formulation of L-lysine hydrochloride, DL-methionine, thermostable phytase, sodium butyrate, salvianolic acid C, plant extracts, and fermented soybean meal, significantly improves the digestibility and absorption efficiency of feed nutrients in livestock and poultry under low dietary crude protein conditions, achieving multiple effects of feed saving, weight gain, and carbon reduction. Specifically, L-lysine hydrochloride and DL-methionine can fill the amino acid gap in low-protein diets, reducing nitrogen intake and excretion at the source; furthermore, their combined action can improve production performance under low-protein diets, avoiding an increase in feed conversion ratio due to reduced protein, indirectly reducing carbon emissions per unit of weight gain; thermostable phytase can degrade phytic acid in plant-based feed ingredients, releasing chelated amino acids, minerals (especially phosphorus), and energy, improving the utilization efficiency of low-protein diets without increasing crude protein content, reducing methane and ammonia generation, and reducing nitrogen and phosphorus excretion; sodium butyrate acts as an intestinal regulator. The agent can be released in the intestines to inhibit the activity of methanogenic and ammonia-producing bacteria, reduce the conversion of methane precursors (such as acetic acid and hydrogen) into methane, and reduce ammonia volatilization. Tanshinone C, as a natural methyl-CoM reductase inhibitor, can block intestinal methane production at its source, enhance the immune function of livestock and poultry, strengthen disease resistance, increase digestive enzyme activity, promote nutrient absorption, accelerate growth, and reduce feed conversion ratio. Plant extracts, through the synergistic effect of multiple natural active ingredients, can effectively inhibit urease activity, regulate gut microbiota, and reduce ammonia volatilization. Furthermore, its plant-derived components are highly safe, and long-term use will not affect the health of livestock and poultry. Fermented soybean meal, as a high-quality protein source with low antigens and high small peptides, can reduce the negative impact of anti-nutritional factors on digestibility and reduce the amount of undigested protein entering the hindgut and being decomposed by bacteria to produce ammonia, while also reducing the overall amount of soybean meal used. In summary, the feed additive for livestock and poultry provided in this application can improve the digestibility and absorption efficiency of feed for livestock and poultry, avoid abnormal fermentation in the hindgut of livestock and poultry, reduce methane and ammonia emissions, reduce feed conversion ratio, and thus improve the breeding efficiency of livestock and poultry farming.

[0008] The plant extracts used in this application are selected from any three of the following: thymol, cinnamaldehyde, hesperidin, sappan flower extract, and gromwell root extract, and are compounded together. All of these plant extracts are derived from natural plants and are highly safe. Specifically, thymol can effectively disrupt the three-dimensional structure of urease, reducing ammonia volatilization; cinnamaldehyde has broad-spectrum antibacterial activity and can regulate the balance of intestinal flora; hesperidin, as a flavanone glycoside, can inhibit the activity of methanogenic archaea and block methane formation; sappan flower extract can enhance the inhibitory effect on urease and reduce total nitrogen excretion in feces and urine; and gromwell root extract is rich in various active ingredients, which help improve intestinal health. This application, by selecting at least three of the above-mentioned plant extracts for compounding, can comprehensively inhibit intestinal urease activity and methanogenic bacteria activity through multi-pathway and multi-target synergistic effects, significantly reduce ammonia and methane emissions, improve the intestinal microecological environment of livestock and poultry, and promote nutrient digestion and absorption, thereby comprehensively improving the effects of feed additives in reducing ammonia emissions and promoting growth. Moreover, the plant-derived components are natural and safe, and are suitable for long-term use in livestock and poultry farming.

[0009] Optionally, the livestock and poultry feed additive comprises the following components in parts by weight: 1.5-3.5 parts L-lysine hydrochloride, 0.8-2.2 parts DL-methionine, 0.1-0.3 parts heat-resistant phytase, 0.8-1 parts sodium butyrate, 0.05-0.08 parts salvianolic acid C, 0.08-0.1 parts plant extract, and 80-120 parts fermented soybean meal.

[0010] Optionally, the livestock and poultry feed additive comprises the following components in parts by weight: 2.5 parts L-lysine hydrochloride, 1.5 parts DL-methionine, 0.2 parts heat-resistant phytase, 1 part sodium butyrate, 0.08 parts salvianolic acid C, 0.1 parts plant extract, and 100 parts fermented soybean meal.

[0011] Optionally, the plant extract is a mixture of thymol, hesperidin, and sappan extract.

[0012] Optionally, the weight ratio of thymol, hesperidin and sappan extract is 1:(4-7):(0.1-0.5).

[0013] In this application, the extract of *Sedum spectabile* contains a variety of flavonoids and phenolic acids, which can scavenge intestinal free radicals, reduce intestinal oxidative stress, and maintain the integrity of the intestinal mucosa. However, when used alone, its target is relatively singular, and its effect on promoting overall digestion and absorption is limited. Thymol also promotes gastrointestinal motility and stimulates the secretion of digestive juices, which can improve the appetite of livestock and poultry and their initial digestion of feed. Hesperidin can enhance the height of small intestinal villi and the depth of crypts, and improve the absorption surface area and transport efficiency of the intestinal mucosa. Through experimental research, this application found that further using the above three plant extracts and controlling their weight ratio within the range of 1:(4-7):(0.1-0.5) can complement each other from three aspects: stimulating the secretion of digestive juices, increasing the absorption surface area, and protecting the absorption interface. This allows the protein, energy, and minerals in the feed to be released and absorbed more fully in the intestine, significantly improving the effect of feed additives on inhibiting methane, reducing ammonia emissions, and promoting digestion and growth in livestock and poultry.

[0014] Secondly, this application provides a method for preparing a feed additive for livestock and poultry that saves feed, comprising the following steps: first, mixing L-lysine hydrochloride, DL-methionine, heat-resistant phytase, sodium butyrate, salvianolic acid C, and plant extracts; then adding fermented soybean meal and stirring at 300-500 r / min for 20-30 min to obtain a premix; then adding water to adjust the moisture content of the premix to 12±2%, granulating, and drying to obtain the feed additive for livestock and poultry that saves feed.

[0015] Thirdly, this application provides an animal feed that includes a feed additive for livestock and poultry.

[0016] Optionally, the amount of the livestock and poultry feed additive added to the animal feed is 80-120g / kg.

[0017] In summary, this application has the following beneficial effects: 1. This application involves a specific compounding of L-lysine hydrochloride, DL-methionine, thermostable phytase, sodium butyrate, salvianolic acid C, plant extracts, and fermented soybean meal to obtain a feed additive for livestock and poultry that can significantly improve the digestibility and absorption efficiency of feed nutrients in livestock and poultry under low-protein diet conditions, reduce the feed conversion ratio, and achieve feed saving and efficiency improvement.

[0018] 2. In the feed additive of this application, the synergistic effect of salvianolic acid C, sodium butyrate, and plant extracts can effectively inhibit the activity of methanogenic and ammonia-producing bacteria in the hindgut, reducing the generation and emission of methane and ammonia, while also reducing nitrogen and phosphorus excretion, significantly mitigating the environmental pollution caused by livestock and poultry farming. The plant extracts are further formulated with a specific weight ratio of thymol, hesperidin, and safflower extract, which can enhance the effects of inhibiting urease activity and blocking methane generation, significantly improving the additive's ammonia-reducing, emission-reducing, and growth-promoting properties. Furthermore, the plant-derived components are highly safe and suitable for long-term use.

[0019] 3. The preparation method of the livestock and poultry feed additive provided in this application is simple, and the resulting additive particles are uniform and have good stability, which is convenient for industrial production. The additive has a reasonable addition amount in animal feed, the raw materials are widely available, the cost is controllable, and it has broad application prospects. Detailed Implementation

[0020] This application provides a feed additive for livestock and poultry that saves feed weight, comprising the following components in parts by weight: 1.5-3.5 parts L-lysine hydrochloride, 0.8-2.2 parts DL-methionine, 0.1-0.3 parts thermostable phytase, 0.5-1.5 parts sodium butyrate, 0.03-0.1 parts salvianolic acid C, 0.05-0.12 parts plant extract, and 80-120 parts fermented soybean meal. The plant extract is selected from at least three of the following: thymol, cinnamaldehyde, hesperidin, sappan flower extract, and gromwell root extract; further, the weight ratio of thymol, hesperidin, and sappan flower extract is 1:(4-7):(0.1-0.5).

[0021] The method for preparing the livestock and poultry feed additive provided in this application includes the following steps: First, L-lysine hydrochloride, DL-methionine, heat-resistant phytase, sodium butyrate, salvianolic acid C, and plant extracts are mixed. Then, fermented soybean meal is added, and the mixture is stirred and mixed at a speed of 300-500 r / min for 20-30 min to obtain a premix. Then, water is added to adjust the moisture content of the premix to 12±2%, and the mixture is granulated and dried to obtain the livestock and poultry feed additive.

[0022] This application provides an animal feed containing a feed additive for saving livestock and poultry feed, wherein the amount of feed additive added to the animal feed is 80-120g / kg.

[0023] In the embodiments of this application, the CAS number of L-lysine hydrochloride is 657-27-2; the CAS number of DL-methionine is 59-51-8; the activity of the thermostable phytase is 50,000-300,000 U / g, purchased from Shandong Fuwangjia Biotechnology Co., Ltd.; sodium butyrate is purchased from Jiangsu Caiwei Biotechnology Co., Ltd.; the CAS number of salvianolic acid C is 115841-09-3, purchased from Sichuan Jingcui Tiancheng Pharmaceutical Technology Co., Ltd.; the CAS number of thymol is 89-83-8, purchased from Shandong Lifan Chemical Co., Ltd.; the CAS number of hesperidin is 520-26-3, purchased from Chengdu Mansite Biotechnology Co., Ltd.; and sappanwood... The extract was purchased from Shaanxi Baichuan Biotechnology Co., Ltd.; cinnamaldehyde, CAS number 104-55-2, was purchased from Wuhan Jiyesheng Chemical Co., Ltd.; Lithospermum erythrorhizon extract was purchased from Lanzhou Waterles Biotechnology Co., Ltd.; fermented soybean meal was purchased from Huamo (Shandong) Biotechnology Co., Ltd.; commercially available feed was purchased from Pizhou Xiaohe Technology Development Co., Ltd., with the following nutritional standards: crude protein 16.5-18%, crude fat 4.0-7.6%, crude fiber 3.0-6.0%, calcium 0.8-1.0%, total phosphorus 0.6-0.8%, and moisture ≤12.0%; all raw materials used in this application are commercially available feed-grade raw materials, which can all be obtained through commercial purchase.

[0024] The following describes this application in further detail with reference to preparation examples, embodiments, and performance testing.

[0025] Preparation Examples 1-7 Preparation Examples 1-7 provide a feed additive for livestock and poultry that saves on feed.

[0026] The difference in the above preparation examples is that the amount of each component added in the livestock and poultry feed additive is shown in Table 1 below.

[0027] The preparation method of the livestock and poultry feed additive provided in Examples 1-7 includes the following steps: weigh each component according to Table 1, first mix L-lysine hydrochloride, DL-methionine, thermostable phytase, sodium butyrate, salvianolic acid C and plant extracts (thymol, hesperidin and sappan extract in a weight ratio of 1:6:0.3), then add fermented soybean meal, stir and mix at 400 r / min for 30 min to obtain a premix; then add water to adjust the moisture content of the premix to 12±2%, granulate using a pellet mill, dry, and obtain a livestock and poultry feed additive with a particle size of 3 mm.

[0028] Table 1. Amounts of each raw material added in Preparation Examples 1-7

[0029] Preparation Examples 8-16 Preparation Examples 8-16 provide a feed additive for livestock and poultry that saves feed.

[0030] The difference between the above preparation example and preparation example 2 lies in the type and ratio of the plant extracts, as shown in Table 2 below.

[0031] Table 2. Types and proportions of plant extracts in the livestock and poultry feed additives prepared in Examples 2 and 8-16

[0032] Comparative Preparation Example 1 Comparative preparation example 1 provides a feed additive for livestock and poultry that saves on feed.

[0033] The difference between the above comparative preparation example and preparation example 2 is that the amount of each raw material added in the livestock and poultry feed additive is: 1g of L-lysine hydrochloride, 3g of DL-methionine, 0.5g of heat-resistant phytase, 1g of sodium butyrate, 0.08g of salvianolic acid C, 0.1g of plant extract, and 100g of fermented soybean meal.

[0034] Comparative Preparation Example 2 Comparative preparation example 2 provides a feed additive for livestock and poultry that saves on feed costs.

[0035] The difference between the above comparative preparation example and preparation example 2 is that the amount of each raw material added in the livestock and poultry feed additive is as follows: 4g of L-lysine hydrochloride, 0g of DL-methionine, 0.5g of heat-resistant phytase, 1g of sodium butyrate, 0.08g of salvianolic acid C, 0.1g of plant extract, and 100g of fermented soybean meal.

[0036] Comparative preparation example 3 Comparative preparation example 3 provides a feed additive for livestock and poultry that saves on feed costs.

[0037] The difference between the above comparative preparation example and preparation example 2 is that the amount of each raw material added in the livestock and poultry feed additive is: L-lysine hydrochloride 2.5g, DL-methionine 1.5g, thermostable phytase 0.2g, sodium butyrate 1g, salvianolic acid C 0g, plant extract 0.18g, and fermented soybean meal 100g.

[0038] Comparative preparation example 4 Comparative preparation example 4 provides a feed additive for livestock and poultry that saves on feed costs.

[0039] The difference between the above comparative preparation example and preparation example 2 is that the amount of each raw material added in the livestock and poultry feed additive is as follows: L-lysine hydrochloride 2.5g, DL-methionine 1.5g, thermostable phytase 0.2g, sodium butyrate 1g, salvianolic acid C 0.18g, plant extract 0g, and fermented soybean meal 100g.

[0040] Examples 1-16 Examples 1-16 each provide an animal feed.

[0041] The difference between the above embodiments is that the livestock and poultry feed additives used in Examples 1-16 are derived from Preparation Examples 1-16.

[0042] The method for preparing animal feed provided in Examples 1-16 includes the following steps: adding livestock and poultry feed-saving additives at an addition rate of 100g / kg to commercially available feed, mixing evenly, and obtaining animal feed containing livestock and poultry feed-saving additives.

[0043] Example 17

[0044] Example 17 provides an animal feed.

[0045] The difference between the above embodiment and embodiment 9 is that the amount of livestock and poultry feed additive added is 80g / kg.

[0046] Example 18

[0047] Example 18 provides an animal feed.

[0048] The difference between the above embodiment and embodiment 9 is that the amount of livestock and poultry feed additive added is 120g / kg.

[0049] Comparative Examples 1-4 Comparative Examples 1-4 each provide an animal feed.

[0050] The difference between the above comparative examples and Example 2 is that the livestock and poultry feed additives used in Comparative Examples 1-4 were respectively derived from Comparative Preparation Examples 1-4.

[0051] Comparative Example 5 Comparative Example 5 provides an animal feed.

[0052] The difference between the above comparative example and Example 2 is that the amount of livestock and poultry feed additive added is 50g / kg.

[0053] Performance testing Feeding trials of weaned piglets were conducted using the animal feeds provided in Examples 1-18 and Comparative Examples 1-5. The experimental methods are as follows: (1) 240 healthy weaned piglets (15±3kg) were randomly divided into 24 groups of 10 each; the experimental period was 21 days. Among them, 18 groups were fed the animal feed provided in Examples 1-18; 5 groups were fed the animal feed provided in Comparative Examples 1-5; and 1 group was fed commercial feed as a blank control group. During the experiment, all conditions were basically the same. Immunization and deworming were carried out according to the routine procedure. The piglets were fed twice a day, with free access to feed and water. The feces were cleaned once a day.

[0054] (2) Feed conversion ratio determination: Before the experiment, the fasting weight of the piglets was measured; after the experiment, the fasting weight of the piglets was measured and the average daily weight gain of each piglet was calculated; after the experiment, the feed consumption of each group of piglets within 21 days was recorded and the average daily feed intake of each piglet was calculated; the feed conversion ratio of the piglets was calculated in a comprehensive manner, and the results are shown in Table 3 below.

[0055] Average daily weight gain per piglet = (Average weight at the end of the trial for each group of piglets - Average starting weight for each group of piglets) / 210 Average daily feed intake per piglet = Feed consumption of each group of piglets over 21 days / 210 Feed conversion ratio = average daily feed intake per piglet / average daily weight gain per piglet.

[0056] (3) Nitrogen and phosphorus excretion determination: On days 19-21 of the experiment, three pigs were selected from each group, and the fecal matter (feces and urine) of each pig was collected and weighed daily. 200g of the weighed and mixed fecal matter was taken daily, and 10% sulfuric acid was added to the fecal matter at 5% of its fresh weight. The mixture was then stored in a refrigerator at 0-5℃. The fecal matter from the same piglet over three days was mixed, and the nitrogen content was determined using the Kjeldahl method. The phosphorus content was determined using the vanadium-molybdenum-ammonium colorimetric method. The average daily nitrogen and phosphorus excretion per piglet in each group was calculated. The results are shown in Table 3 below.

[0057] Table 3. Results of the piglet feeding trial

[0058] According to the test results in Table 3, the 21-day weaned piglet feeding experiment was conducted using animal feeds obtained in Examples 1-18, Comparative Examples 1-5, and commercially available animal feeds. The average daily feed intake of piglets fed in Examples 1-18 was 535.5-588.6 g / piglet, the average daily weight gain was 364.8-405.4 g / piglet, and the feed conversion ratio was 1.38-1.59. In contrast, the average daily feed intake of piglets fed in Comparative Examples 1-5 and commercially available feeds was 562.1-624.8 g / piglet, the average daily weight gain was only 335.7-362.5 g / piglet, and the feed conversion ratio was as high as 1.64-1.75. Clearly, the average daily weight gain of piglets fed in Examples 1-18 was significantly higher than that of piglets fed in Comparative Examples 1-5 and commercially available feeds, and the feed conversion ratio of piglets fed in Examples 1-18 was significantly lower than that of piglets fed in Comparative Examples 1-5 and commercially available feeds. Therefore, this application demonstrates that the livestock and poultry feed additive provided can improve the intestinal health and digestive and absorptive capacity of piglets, effectively improve the utilization efficiency of low-protein diets, thereby improving the growth performance and feed conversion rate of piglets, reducing nitrogen and phosphorus excretion, and has great economic value and environmental significance.

[0059] The test results of Examples 1-7 and Comparative Examples 1-4 show that the average daily feed intake of piglets fed with animal feed obtained in Examples 1-7 was 535.5-588.6 g / pig, the average daily weight gain was 377.8-405.4 g / pig, the feed conversion ratio was 1.38-1.52, the nitrogen emission was 7.33-10.11 g / d / pig, and the phosphorus emission was 1.78-3.48 g / d / pig; while the average daily feed intake of piglets fed with animal feed obtained in Comparative Examples 1-4 was 562.1-594.3 g / pig, the average daily weight gain was only 335.7-362.5 g / pig, the feed conversion ratio was as high as 1.64-1.70, the nitrogen emission was 10.27-11.82 g / d / pig, and the phosphorus emission was 2.64-3.45 g / d / pig. Therefore, this application demonstrates that the feed additive prepared by compounding L-lysine hydrochloride, DL-methionine, thermostable phytase, sodium butyrate, salvianolic acid C, plant extracts, and fermented soybean meal, and controlling the dosage of each component within a specific range, has a good promoting effect on the growth of piglets, while significantly reducing nitrogen and phosphorus excretion. Further comparison revealed that the feed conversion ratio of the animal feeds obtained in Examples 1-3 and Examples 5-6 after feeding piglets was only 1.38-1.43 (<1.45), nitrogen emissions were only 7.33-8.42 g / d / head (<8.5 g / d / head), and phosphorus emissions were only 1.78-2.31 g / d / head (<2.5 g / d / head). (g / d / head) indicates that this application further controls the weight parts of each component within the following range: L-lysine hydrochloride 1.5-3.5 parts, DL-methionine 0.8-1.5 parts, thermostable phytase 0.1-0.3 parts, sodium butyrate 0.8-1.0 parts, salvianolic acid C 0.05-0.08 parts, plant extract 0.08-0.1 parts, fermented soybean meal 80-120 parts. The resulting feed additive has a better growth-promoting effect on piglets, resulting in better feed conversion rate and emission reduction effect for piglets.

[0060] The test results of Examples 2 and 8-16 show that, in Examples 2 and 8-12, using thymol, hesperidin, and safflower extract in a weight ratio of 1:(4-7):(0.1-0.5) as plant extracts, the average daily feed intake of piglets fed with animal feed was 535.5-572.4 g / head, the average daily weight gain was 371.4-385.1 g / head, the feed conversion ratio was 1.40-1.53, nitrogen emissions were 7.33-9.34 g / day / head, and phosphorus emissions were 1.59-2.25 g / day / head. In contrast, Examples 13-16, using other plant extracts or their formulations, resulted in an average daily feed intake of 561.8-576.1 g / head and an average daily weight gain of 364.8-371.3 g / head for piglets fed with animal feed. The feed conversion ratio (FCR) is 1.52-1.58, with nitrogen emissions of 8.35-10.91 g / d / head and phosphorus emissions of 1.36-3.25 g / d / head. This application further utilizes thymol, hesperidin, and safflower extract in a weight ratio of 1:(4-7):(0.1-0.5) as plant extracts, resulting in a feed additive with better efficacy, significantly reducing the FCR and nitrogen and phosphorus emissions in piglets.

[0061] The test results of Examples 2, 17-18, and Comparative Example 5 show that, in Examples 2 and 17-18, when the amount of livestock and poultry feed additive added to animal feed was controlled within the range of 80-120 g / kg, the average daily feed intake of piglets fed with this animal feed was 535.5-583.7 g / pig, the average daily weight gain was 368.2-382.8 g / pig, the feed conversion ratio was 1.40-1.59, nitrogen emissions were 7.33-9.57 g / day / pig, and phosphorus emissions were 1.78-2.45 g / day / pig. In contrast, when the addition amount in Comparative Example 5 was controlled at 50 g / kg, the average daily feed intake of piglets fed with this animal feed was as high as 612.2 g / pig, the average daily weight gain was only 355.9 g / pig, the feed conversion ratio was as high as 1.72, nitrogen emissions were 12.15 g / day / pig, and phosphorus emissions were 3.58 g / day / pig. g / d / head. Therefore, this application demonstrates that by controlling the amount of livestock and poultry feed additives added to animal feed within the range of 80-120 g / kg, the resulting animal feed for piglets has a low feed conversion ratio, low nitrogen and phosphorus emissions, high feed conversion rate, and good environmental performance.

[0062] In summary, the feed additive for livestock and poultry provided in this application can improve the growth performance and feed conversion rate of piglets through multiple effects, such as amino acid balance under low-protein diets, phytate hydrolysis, intestinal methane and ammonia inhibition, and synergistic effects of plant extracts. It can also significantly reduce nitrogen and phosphorus excretion, achieving multiple effects of feed saving, weight gain and carbon reduction, and providing an efficient and environmentally friendly solution for the livestock and poultry farming industry.

[0063] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A feed additive for livestock and poultry that saves feed, characterized in that, It comprises the following components in parts by weight: 1.5-3.5 parts L-lysine hydrochloride, 0.8-2.2 parts DL-methionine, 0.1-0.3 parts thermostable phytase, 0.5-1.5 parts sodium butyrate, 0.03-0.1 parts salvianolic acid C, 0.05-0.12 parts plant extract, and 80-120 parts fermented soybean meal; The plant extract is selected from at least three of the following: thymol, cinnamaldehyde, hesperidin, sappan flower extract, and gromwell root extract.

2. The livestock and poultry feed additive according to claim 1, characterized in that, The livestock and poultry feed additive comprises the following components in parts by weight: 1.5-3.5 parts L-lysine hydrochloride, 0.8-2.2 parts DL-methionine, 0.1-0.3 parts heat-resistant phytase, 0.8-1 parts sodium butyrate, 0.05-0.08 parts salvianolic acid C, 0.08-0.1 parts plant extract, and 80-120 parts fermented soybean meal.

3. The livestock and poultry feed additive according to claim 1, characterized in that, The livestock and poultry feed additive comprises the following components in parts by weight: 2.5 parts L-lysine hydrochloride, 1.5 parts DL-methionine, 0.2 parts heat-resistant phytase, 1 part sodium butyrate, 0.08 parts salvianolic acid C, 0.1 parts plant extract, and 100 parts fermented soybean meal.

4. The livestock and poultry feed additive according to claim 1, characterized in that, The plant extract is a mixture of thymol, hesperidin, and sappan extract.

5. The livestock and poultry feed additive according to claim 4, characterized in that, The weight ratio of thymol, hesperidin and sappan extract is 1:(4-7):(0.1-0.5).

6. The method for preparing the livestock and poultry feed additive according to any one of claims 1-5, characterized in that, Includes the following steps: First, L-lysine hydrochloride, DL-methionine, heat-resistant phytase, sodium butyrate, salvianolic acid C, and plant extracts are mixed. Then, fermented soybean meal is added and stirred at 300-500 r / min for 20-30 min to obtain a premix. Then, water is added to adjust the moisture content of the premix to 12±2%, and after granulation and drying, a feed additive for saving feed for livestock and poultry is obtained.

7. An animal feed comprising the livestock and poultry feed additive according to any one of claims 1-5.

8. The animal feed according to claim 7, characterized in that, The amount of the livestock and poultry feed additive added to animal feed is 80-120g / kg.

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