Method for producing DHA (docosahexaenoic acid) and selenium-enriched eggs by using schizochytrium limacinum powder and selenium yeast
By simultaneously adding schizopyrene powder and yeast selenium to the laying hen feed, the problem of rare egg products enriching selenium and omega-3 polyunsaturated fatty acids on the existing market is solved, and the DHA and selenium content in the eggs is significantly improved, which improves the production performance of laying hens and the egg quality of eggs, providing scientific and technological support for the functional egg industry.
Patent Information
- Application Number
- CN202510551861.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2025-06-10
AI Technical Summary
Egg products that are enriched with selenium and omega-3 polyunsaturated fatty acids are rarely seen on the existing market, which cannot meet residents' demand for high nutritional value.
By simultaneously adding 0.8% cythoxycycline powder and 17.5 g/100 kg of yeast selenium to the laying hen feed, the feed is reasonably prepared to promote the growth and development of laying hens and improve the immune function, thereby enriching the selenium and omega-3 polyunsaturated fatty acids in the feed into the eggs.
It significantly improves the DHA content and selenium content in eggs, improves the production performance of laying hens and the egg quality of eggs, and provides scientific and technological support for the functional egg industry.
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Abstract
Description
Technical Field
[0001] The present invention relates to the field of laying hen production, and specifically to a method for producing eggs enriched with DHA and selenium by simultaneously adding Schizochytrium powder and yeast selenium. Background Art
[0002] With the continuous improvement of people's living standards and the continuous strengthening of health awareness, the demand for the nutritional quality of livestock and poultry products is also constantly increasing. Currently, producing eggs that can enrich people's nutritional needs and increase the added value of products has become the main focus of the development of the egg industry at home and abroad. Therefore, adding various additives to laying hen diets and producing functional eggs through animal conversion to obtain eggs with higher nutritional value than ordinary eggs. Developing nutritious and multifunctional egg products has become one of the important tasks of livestock workers in our country.
[0003] Docosahexaenoic acid (DHA) is an ω-3 polyunsaturated fatty acid (ω-3PUFA), which has the effects of regulating cardiovascular diseases, improving intelligence, reducing cholesterol and triglycerides, and anti-inflammatory. In most regions of our country, the diets of residents are generally lacking in foods rich in DHA, resulting in insufficient DHA intake in the body, so additional supplementation is required. Currently, the main products used to supplement DHA are fish oil or krill oil, DHA-rich algae, cod liver oil preparations, etc., but fish oil products have an unpleasant smell and are expensive.
[0004] DHA in eggs is more easily absorbed and utilized by the human body, and eggs have a high protein content, high-quality fat, and low price. By consuming eggs rich in DHA, not only can protein be supplemented, but also the human body's demand for DHA can be met. As a feed additive, Schizochytrium powder is directly added to the feed and widely used in laying hens, which has the effects of improving survival rate, increasing DHA content, enhancing body color, promoting fat metabolism, and improving non-specific immunity.
[0005] Selenium is one of the essential trace elements for the healthy growth of humans and animals. At present, the selenium content in the food of residents in our country has not reached 0.04 mg, which poses a great threat to people's physical health. Appropriate selenium supplementation can prevent various diseases caused by selenium deficiency, enhance immunity, antioxidant capacity, antagonize heavy metals, and improve the production performance of animals.
[0006] Eggs are rich in high-quality protein, vitamins, and minerals, and have a wide coverage in the human diet. The research and promotion of selenium-enriched eggs are conducive to the research and utilization of selenium-enriched products. Yeast selenium is a green organic selenium feed additive, which has no toxic and side effects, high utilization rate, will not cause environmental pollution, can improve the production performance of livestock and poultry and the utilization rate of nutrients in feed, enhance immune function and antioxidant capacity, and improve the quality of livestock and poultry products.
[0007] At present, single products such as selenium-enriched eggs and eggs with high ω-3 polyunsaturated fatty acids are relatively common, but eggs that simultaneously enrich selenium and ω-3 polyunsaturated fatty acids are rarely seen in the market. Therefore, in this experiment, Schizochytrium powder and yeast selenium were added simultaneously, and combined with the nutritional requirements of laying hens. By reasonably formulating the feed, it promoted the growth and development of laying hens, enhanced their disease resistance, improved their immune function. On the basis of enhancing the health level of laying hens, through the body transformation, selenium and ω-3 polyunsaturated fatty acids in the feed were simultaneously enriched in the eggs, thus producing egg products that simultaneously enrich selenium and ω-3 polyunsaturated fatty acids, providing scientific and technological support for the development of the functional egg industry. Summary of the Invention
[0008] At present, the per capita DHA intake of Chinese residents is seriously insufficient. The primary reason is that most residents lack sufficient intake of foods containing natural DHA sources, and secondly, the currently marketed DHA supplements are expensive due to technical and environmental limitations.
[0009] The selenium resources in China are significantly unevenly distributed, and more than 70% of the country's territory is selenium-deficient. Short-term selenium deficiency can lead to a decline in the body's immunity, and long-term selenium deficiency is likely to cause endemic diseases such as Keshan disease and Kashin-Beck disease. Therefore, sufficient selenium needs to be supplemented in the body.
[0010] Therefore, it is necessary to develop a functional food with high DHA and selenium content, stable quality, and convenient consumption to meet people's daily needs.
[0011] In view of the above deficiencies, the present invention provides a method for producing eggs that simultaneously enrich DHA and selenium using Schizochytrium powder and yeast selenium. The eggs produced by this method can significantly increase the DHA content and selenium content therein.
[0012] To solve its technical problems, the present invention provides the following technical solutions: A method for producing DHA-enriched eggs using Schizochytrium powder, characterized by the following steps: Raising laying hens: Add Schizochytrium powder to the basic feed, rationally mix the ingredients, and feed after mixing to obtain the feed for producing DHA-enriched eggs; during the laying period of the laying hens, feed the laying hens with the following formula feed: by weight ratio, the basic feed is 99.2%, and the Schizochytrium powder is 0.8%; continuously feed for 2 months.
[0013] Another preferred solution of the present invention: Raising laying hens: Add yeast selenium to the basic feed, rationally mix the ingredients, and feed after mixing to obtain the feed for producing selenium-enriched eggs; during the laying period of the laying hens, feed the laying hens with the following formula feed: by weight ratio, the basic feed is 99.998%, and the yeast selenium is 17.5 g / 100 kg, continuously feed for 2 months.
[0014] The present invention also has a preferred solution: feeding laying hens: adding Schizochytrium powder and yeast selenium to the basal diet at the same time, rationally formulating the ingredients, mixing them evenly and then feeding, to obtain the feed for producing eggs enriched with both DHA and selenium; during the laying period of the laying hens, feeding the laying hens with the following formula feed: basal diet 99.198%, Schizochytrium powder 0.8%, yeast selenium 17.5 g / 100 kg, and continuously feeding for 2 months.
[0015] The present invention further discloses the application of the method for producing eggs enriched with both DHA and selenium using Schizochytrium powder and yeast selenium in enhancing the enrichment of DHA and selenium in eggs. The experimental results show that adding two raw materials, 0.8% Schizochytrium powder and 17.5 g / 100 kg yeast selenium, to the basal diet at the same time can well improve the production performance of laying hens and enhance the egg quality of eggs, and adding the two raw materials at the same time has a significant effect on enhancing the content of both DHA and selenium enriched in the eggs of laying hens.
[0016] The present invention is described in more detail as follows: A method for producing eggs enriched with both DHA and selenium using Schizochytrium powder and yeast selenium, characterized in that it is carried out according to the following steps: (1) First, a feeding experiment of adding Schizochytrium powder to the basal diet was carried out: Adding Schizochytrium powder to the basal diet, rationally formulating the ingredients, mixing them evenly and then feeding, to obtain the feed for producing eggs enriched with DHA; during the laying period of the laying hens, the feed for feeding the laying hens: by weight ratio, basal diet 99.2%, Schizochytrium powder 0.8%. The feeding period is 2 months.
[0017] It can be detected that: by adding 0.8% Schizochytrium powder to the basal diet, the content of DHA enriched in the eggs produced by the laying hens is increased from 0.978% to 2.32%, an increase of 1.324%.
[0018] (2) Secondly, a feeding experiment of adding yeast selenium to the basal diet was carried out: Adding yeast selenium to the basal diet, rationally formulating the ingredients, mixing them evenly and then feeding, to obtain the feed for producing selenium-enriched eggs; during the laying period of the laying hens, the feed for feeding the laying hens: by weight ratio, basal diet 99.998%, yeast selenium 17.5 g / 100 kg. The feeding period is 2 months.
[0019] It can be detected that: by adding 17.5 g / 100 kg yeast selenium to the basal diet, the content of selenium enriched in the eggs produced by the laying hens is increased from 0.15 mg / kg to 0.50 mg / kg, an increase of 0.35 mg / kg.
[0020] (3) Finally, a feeding experiment of adding Schizochytrium powder and yeast selenium to the basal diet at the same time was carried out: Add Schizochytrium powder and yeast selenium to the basal diet simultaneously, mix the ingredients rationally, and feed after mixing. Obtain the feed for simultaneously producing eggs enriched with DHA and selenium; during the laying period of laying hens, feed the laying hens with the following feed: by weight ratio, 99.198% of basal diet, 0.8% of Schizochytrium powder, and 17.5 g / 100 kg of yeast selenium. The feeding cycle is 2 months.
[0021] It can be detected that: when 0.8% of Schizochytrium powder and 17.5 g / 100 kg of yeast selenium are added to the basal diet simultaneously, the content of DHA enriched in the eggs produced by laying hens increases from 0.978% to 2.40%, an increase of 1.422%; the content of selenium enriched in the eggs produced by laying hens increases from 0.15 mg / kg to 0.56 mg / kg, an increase of 0.41 mg / kg.
[0022] It should be noted particularly that: first, conduct the feeding experiment with 0.8% of Schizochytrium powder, second, conduct the feeding experiment with 17.5 g / 100 kg of yeast selenium, and finally conduct the feeding experiment with 0.8% of Schizochytrium powder and 17.5 g / 100 kg of yeast selenium added simultaneously. It can be known therefrom that the method of using Schizochytrium powder and yeast selenium to produce eggs enriched with DHA and selenium simultaneously has the best effect and can significantly increase the DHA content and selenium content therein.
[0023] Currently, single products of selenium-enriched eggs and eggs with high ω-3 polyunsaturated fatty acids are relatively common, but eggs enriched with both selenium and ω-3 polyunsaturated fatty acids are rarely seen in the market. The present invention further discloses the application of the method of using Schizochytrium powder and yeast selenium to produce eggs enriched with DHA and selenium simultaneously in enhancing the enrichment of DHA and selenium in eggs.
[0024] The present invention first explored adding 0.8% of Schizochytrium powder to the basal diet. The experimental results show that: compared with the control group, adding 0.8% of Schizochytrium powder to the basal diet has no significant difference in production performance indexes such as the average egg weight, feed-to-egg ratio, laying rate, and average daily feed intake of laying hens during the whole experimental period, but there is an upward trend in all of them; there is no significant difference in egg quality indexes such as the egg shape index, eggshell strength, eggshell thickness, albumen height, and Haugh unit of laying hens during the whole experimental period, but there is an upward trend in all of them, and it has a significant effect on improving the yolk color in the egg quality of laying hens.
[0025] Secondly, the experiment explored adding 17.5 g / 100 kg of yeast selenium to the basal diet. The experimental results showed that compared with the control group, adding 17.5 g / 100 kg of yeast selenium to the basal diet had no significant differences in production performance indicators such as the average egg weight, feed-to-egg ratio, laying rate, and average daily feed intake during the entire experimental period of laying hens, but all showed an upward trend; there were no significant differences in egg quality indicators such as the egg shape index, eggshell strength, eggshell thickness, albumen height, and Haugh unit during the entire experimental period of laying hens, but all showed an upward trend, and it had a significant effect on improving the yolk color in the egg quality of laying hens.
[0026] Finally, the experiment explored adding 0.8% Schizochytrium powder and 17.5 g / 100 kg of yeast selenium to the basal diet at the same time. The experimental results showed that compared with the control group, adding 0.8% Schizochytrium powder and 17.5 g / 100 kg of yeast selenium to the basal diet at the same time had no significant differences in production performance indicators such as the average egg weight, feed-to-egg ratio, laying rate, and average daily feed intake during the entire experimental period of laying hens, but all showed an upward trend; there were no significant differences in egg quality indicators such as the egg shape index, eggshell strength, and eggshell thickness during the entire experimental period of laying hens, but all showed an upward trend, and it had a significant effect on improving the yolk color, albumen height, and Haugh unit in the egg quality of laying hens.
[0027] It can be detected that: when adding 0.8% Schizochytrium powder to the basal diet, the DHA content enriched in the eggs produced by laying hens increased from 0.978% to 2.32%, an increase of 1.324%. When adding 17.5 g / 100 kg of yeast selenium to the basal diet, the selenium content enriched in the eggs produced by laying hens increased from 0.15 mg / kg to 0.50 mg / kg, an increase of 0.35 mg / kg. When adding 0.8% Schizochytrium powder and 17.5 g / 100 kg of yeast selenium to the basal diet at the same time, the DHA content enriched in the eggs produced by laying hens increased from 0.978% to 2.40%, an increase of 1.422%; the selenium content enriched in the eggs produced by laying hens increased from 0.15 mg / kg to 0.56 mg / kg, an increase of 0.41 mg / kg.
[0028] It can be learned from the present invention that adding 0.8% Schizochytrium powder and 17.5 g / 100 kg of yeast selenium to the basal diet at the same time can significantly improve the production performance of laying hens and effectively enhance the egg quality of eggs. In particular, there is a significant increase in the simultaneous enrichment of DHA and selenium content in the eggs of laying hens. It provides strong scientific and technological support for the development of the egg industry.
[0029] Advantages of the present invention: By adding 0.8% Schizochytrium powder and 17.5 g / 100 kg yeast selenium to the feed simultaneously, and in combination with the nutritional requirements of laying hens, through reasonable formulation of the feed, the growth and development of laying hens can be promoted, and the egg quality of eggs can be improved. In addition, ω-3 polyunsaturated fatty acids and selenium in the feed are enriched in eggs, enabling the production of functional products that simultaneously enrich DHA and selenium-enriched eggs, providing scientific and technological support for the development of the functional egg industry. Detailed implementation manners
[0030] The present invention will be described below through specific implementation examples. Unless otherwise specified, the technical means used in the present invention are all methods well known to those skilled in the art. In addition, the implementation examples should be understood as illustrative and not limiting the scope of the present invention. The essence and scope of the present invention are only defined by the claims. For those skilled in the art, without departing from the essence and scope of the present invention, various changes or modifications to the material components and dosages in these implementation examples also fall within the protection scope of the present invention. Raw materials such as corn-soybean meal type feed, docosahexaenoic acid (DHA), and yeast selenium used in the present invention are all commercially available.
[0031] In the following examples, a corn-soybean meal type feed is used as the basic feed. First, 0.8% Schizochytrium powder is added to the feed, and the feeding period is 2 months; secondly, 17.5 g / 100 kg yeast selenium is added, and the feeding period is 2 months; finally, 0.8% Schizochytrium powder and 17.5 g / 100 kg yeast selenium are added simultaneously, and the feeding period is 2 months.
[0032] The composition and nutritional level of the basic feed are shown in Table 1: Table 1 Composition and nutritional level of the basic diet (dry matter basis) Raw material composition Content (%) Nutritional level Corn 65.00 Poultry metabolizable energy (MJ / kg) 13.41 Soybean meal 21.00 Crude protein / % 16.11 Calcium hydrogen phosphate 1.90 Crude fat / % 7.27 Limestone powder 8.00 Crude moisture / % 8.59 Table salt 0.23 Crude ash / % 12.67 Lysine 0.70 Calcium / % 3.08 Methionine 0.17 Total phosphorus % 0.56 Vegetable oil 1.00 Premix 2.00 Total 100.00 Example 1
[0033] A method for producing DHA-enriched eggs using Schizochytrium powder 1) A corn-soybean meal type feed as described in Table 1 is used as the basic feed, which is the control group.
[0034] 2) 0.8% Schizochytrium powder is added to the basic feed, and it is stirred and mixed evenly with a feed mixer for 15 minutes to obtain the feed for DHA-enriched eggs, which is used as the experimental group.
[0035] 3) The feeds of the control group and the experimental group are fed to laying hens for a feeding period of 2 months.
[0036] Example 2 A method for producing selenium-enriched eggs using yeast selenium 1) Use a corn - soybean meal type feed as described in Table 1 as the basal feed, which is the control group.
[0037] 2) Add 17.5 g / 100 kg of yeast selenium to the basal feed, mix well with a feed mixer for 15 min to obtain the feed for selenium - enriched eggs, which is used as the experimental group.
[0038] 3) Feed the laying hens with the feeds of the control group and the experimental group for a feeding period of 2 months.
[0039] Example 3 A method for producing eggs simultaneously enriched with DHA and selenium using Schizochytrium powder and yeast selenium 1) Use a corn - soybean meal type feed as described in Table 1 as the basal feed, which is the control group.
[0040] 2) Add 0.8% of Schizochytrium powder and 17.5 g / 100 kg of yeast selenium to the basal feed simultaneously, mix well with a feed mixer for 15 min to obtain the feed for eggs simultaneously enriched with DHA and selenium, which is used as the experimental group.
[0041] 3) Feed the laying hens with the feeds of the control group and the experimental group for a feeding period of 2 months.
[0042] Effect verification (I) Effects of adding Schizochytrium powder to the basal feed 1.1 Production performance Evaluate the production performance of laying hens after continuous feeding for two months, and the evaluation results are shown in Table 2;
[0043] 1.2 Egg quality determination Evaluate the egg quality of eggs from laying hens after continuous feeding for two months, and the evaluation results are shown in Table 3;
[0044] (II) Effects of adding yeast selenium to the basal feed 2.1 Production performance Evaluate the production performance of laying hens after continuous feeding for two months, and the evaluation results are shown in Table 4;
[0045] 2.2 Egg quality determination Evaluate the egg quality of eggs from laying hens after continuous feeding for two months, and the evaluation results are shown in Table 5;
[0046] (3) Effects of Simultaneously Adding Schizochytrium Powder and Yeast Selenium to the Basal Diet 3.1 Production Performance The production performance of laying hens fed continuously for two months was evaluated, and the evaluation results are shown in Table 6;
[0047] 3.2 Egg Quality Determination The egg quality of eggs from laying hens fed continuously for two months was evaluated, and the evaluation results are shown in Table 7;
[0048] (4) Detection Results of DHA Content in Laying Hens
[0049] (5) Detection Results of Selenium Content in Laying Hens
[0050] (6) Detection Results of DHA Content and Selenium Content in Laying Hens
[0051] It can be seen from Table 2 and Table 3 that the laying hens fed with the feed for producing DHA-enriched eggs by adding Schizochytrium powder in the present invention have better production performance, and the eggs produced have higher egg quality.
[0052] It can be seen from Table 4 and Table 5 that the laying hens fed with the feed for producing selenium-enriched eggs by adding yeast selenium in the present invention have better production performance, and the eggs produced have higher egg quality.
[0053] It can be seen from Table 6 and Table 7 that the laying hens fed with the feed for simultaneously enriching DHA and selenium-enriched eggs by adding Schizochytrium powder and yeast selenium in the present invention have better production performance, and the eggs produced have higher egg quality.
[0054] It can be seen from Table 8 that by adding 0.8% Schizochytrium powder to the basal diet, the DHA content in the eggs produced by the laying hens increased from 0.978% to 2.32%, an increase of 1.324%.
[0055] It can be seen from Table 9 that by adding 17.5 g / 100 kg yeast selenium to the basal diet, the selenium content in the eggs produced by the laying hens increased from 0.15 mg / kg to 0.50 mg / kg, an increase of 0.35 mg / kg.
[0056] As can be seen from Table 10, when 0.8% Schizochytrium powder and 17.5 g / 100 kg yeast selenium are added to the basal diet simultaneously, the DHA content enriched in the eggs produced by laying hens increases from 0.978% to 2.40%, an increase of 1.422%; the selenium content enriched in the eggs produced by laying hens increases from 0.15 mg / kg to 0.56 mg / kg, an increase of 0.41 mg / kg.
[0057] Conclusion: When 0.8% Schizochytrium powder and 17.5 g / 100 kg yeast selenium are added to the basal diet simultaneously, it can effectively improve the production performance of laying hens and enhance the egg quality of eggs, and has a significant effect on simultaneously enriching DHA and selenium content in the eggs of laying hens.
[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific embodiments of the present invention, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.
Claims
1. A method for producing DHA-enriched eggs using schizont powder, characterized in that Proceed as follows: (1) Raising laying hens: adding Schizochytrium powder to a basic feed, mixing the ingredients appropriately, and feeding the feed to obtain the feed for producing DHA-enriched eggs; during the laying period of the laying hens, the feed fed to the laying hens is: by weight, 99.2% of the basic feed and 0.8% of the Schizochytrium powder; (2) The eggs produced by laying hens during the 2-month breeding period are DHA-enriched eggs.
2. A method for producing selenium-enriched eggs using yeast selenium, characterized in that Proceed as follows: (1) Raising laying hens: adding yeast selenium to basic feed, mixing them reasonably, and feeding them to obtain the feed for producing selenium-enriched eggs; during the laying period of laying hens, the feed for feeding eggs is: by weight, 99.998% of basic feed and 17.5 g of yeast selenium per 100 kg; (2) The eggs produced by laying hens during the 2-month breeding period are selenium-rich eggs.
3. A method for producing eggs enriched with DHA and selenium using schizont powder and yeast selenium, characterized in that Proceed as follows: (1) Raising laying hens: adding Schizochytrium powder and yeast selenium to the basic feed, mixing them reasonably, and feeding them to obtain the feed for producing eggs enriched with DHA and selenium; during the laying period of the laying hens, the feed fed to the laying hens is: by weight, 99.198% of the basic feed, 0.8% of the Schizochytrium powder, and 17.5 g of yeast selenium per 100 kg; (2) The breeding cycle is 2 months, and the eggs produced by laying hens are enriched with both DHA and selenium.
4. Application of the method for producing eggs simultaneously enriched with DHA and selenium using schizont powder and yeast selenium as described in claim 3 to improving the enrichment of eggs with DHA and selenium.