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β-glucan is a kind of natural polysaccharide, which can be used as a green additive in many fields such as food and aquaculture, and has sustainability and ecological friendliness. β-glucan has many biological functions, which can inhibit and eliminate excessive free radicals in vivo, activate the antioxidant enzyme system and reduce the degree of oxidative stress. β-glucan can reduce the production of inflammatory factors and alleviate the tissue damage caused by inflammation by regulating the inflammatory pathway. β-glucan can repair intestinal barrier, regulate intestinal microecology, and reduce the penetration of bacteria and toxins. β-glucan can regulate glucose and lipid metabolism, ensure that animals get enough energy supply, and thus maintain the health of the body. In this paper, the characteristics, biological functions and application status of β-glucan in livestock and poultry and aquaculture were reviewed in order to provide a reference for further application of β-glucan in animal breeding. [ABSTRACT FROM AUTHOR]

Honeysuckle, as an important medicinal and edible plant, contains a variety of chemical active components, mainly including volatile oils, flavonoids, organic acids and iridoid glycosides, etc., which have antibacterial, antiinflammatory, antiviral, antioxidant, antipyretic, and immunomodulatory effects. Honeysuckle and its extract can improve the digestion, absorption and utilization rate of feed, promote the growth and development of livestock and poultry and meat quality, regulate the metabolism of energy, protein, lipids and sugar of livestock and poultry, and improve the immune function and antioxidant capacity of livestock and poultry. In the paper, the main active components, physiological functions, and application status of honeysuckle and its extracts in livestock and poultry production were summarized, in order to provide a reference for honeysuckle and its extracts to improve the production efficiency and product quality of livestock and poultry, and to replace antibiotics in livestock and poultry production. [ABSTRACT FROM AUTHOR]

In addition to probiotics, some inactivated bacteria, their components, and metabolites also have many probiotic functions, which can be collectively called postbiotics Postbiotics mainly come from inactive components in probiotics, which can play a probiotic role. It has the advantages of high safety, good stability and wide applicability, and has many probiotic effects such as improving gastrointestinal function, anti-inflammatory and bacteriostatic, immune regulation, and relieving obesity. It has broad application prospects in the fields of food, medicine, and animal husbandry production. At present, postbiotics has been gradually used in animal production, and has shown many functions, such as improving livestock and poultry production performance, improving animal product quality and preventing and treating diseases, but its application has not been popularized. In this paper, the research progress of postbiotics in livestock and poultry production was summarized, in order to provide a reference for its further wide application in animal husbandry. [ABSTRACT FROM AUTHOR]

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Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Experimentally selecting the import prices of soybean meal raw materials from January 2017 to February 2022, spanning a total of 62 monthly periods, along with the prices of the feed industry chain as samples, this study empirically investigates the impact of soybean meal raw material import price shocks on the volatility of feed industry chain prices by constructing a VAR model. The Granger causality effect indicates that the impact of soybean meal raw material import price shocks on the volatility of feed industry chain prices has a lag effect. The impulse response suggests that when the soybean meal raw material import price experiences a positive shock of one standard deviation, the feed industry chain prices will show a 0.001 3 response starting from the second period and exhibit a sustained upward trend, reaching its peak in the 10th period. The results of the shock cycle test reveal that changes in soybean meal raw material import prices have a significantly positive impact on subsequent fluctuations in feed industry chain prices, indicating that soybean meal raw material import price shocks play a driving role in the upward movement of feed industry chain prices. Variance decomposition data results indicate that during the period of volatility in feed industry chain prices, the feed industry chain prices themselves play a dominant role, with the contribution rate showing a trend of first declining and then rising. At the same time, the impact of soybean meal raw material import price shocks on the volatility of feed industry chain prices exhibits a certain lag period, becoming evident from the third period and peaking in the 9th period, followed by a downward trend. In the paper, the recommendations are made to enhance technical support for industry cultivation, rational planning of feed planting areas, and optimization of the feed industry's supply security mechanism, providing valuable reference for stabilizing feed industry prices. [ABSTRACT FROM AUTHOR]

Adenosine monophosphate deaminase (AMPD) and adenosine monophosphate activated protein kinase (AMPK) are both key enzymes that rely on adenosine monophosphate (AMP) to regulate energy metabolism and play an important role in cellular metabolism. The article introduces the influence of AMPD and AMPK on the activity of lipid metabolism-related enzymes and their reciprocal regulatory interactions mediated by insulin signaling molecules. The paper analyzes their collaborative regulation mechanisms in cellular energy metabolism and lipid synthesis in pathways such as the tricarboxylic acid cycle and lipid metabolism, providing an overview of research outcomes related to the application of AMPD and AMPK in animal production. The review summarizes the impact of AMPD and AMPK, as well as their interactions, on lipid metabolism mechanisms. Through a comprehensive study of lipid metabolism pathways, the study aims to enhance understanding in animal production. Additionally, by further elucidating lipid synthesis pathways to understand the lipid accumulation mechanism in oleaginous microorganisms, the study aims to provide insights for increasing lipid production in oleaginous microorganisms, producing palatable animal feed, and improving animal welfare. [ABSTRACT FROM AUTHOR]

In recent years, plant extracts have been widely used in the animal husbandry because of their naturalness, low toxicity and minimal residue. Green tea is a kind of traditional drink. The polyphenols contained in the green tea have many pharmacological activities. EGCG is the main abundant phenolic active substance in the green tea polyphenols, and it is also one of the main active components of catechin that plays a pharmacological role. EGCG has various biological functions such as antioxidant, antibacterial, antiviral, anti-parasitic and enhancing immunity, and can inhibit cyanobacteria bloom and regulate water quality. It has broad application prospects in the aquaculture. In the paper, the properties, extraction technology, biological function and research progress of EGCG in aquaculture are reviewed, aiming to provide further reference for the application of EGCG in aquaculture. [ABSTRACT FROM AUTHOR]

Palm kernel meal is a byproduct obtained after the oil extraction from palm kernels,characterized by abundant production, high nutritional value, low cost, and a relatively low content of anti-nutritional factors. The use of microbiological fermentation techniques can effectively degrade anti-nutritional factors in palm kernel meal, thereby enhancing its digestibility. The article provides an overview of the production process, nutritional value, and the feasibility of reducing and replacing soybean meal with palm kernel meal. It primarily explores methods such as steam explosion pretreatment, enzyme treatment with composite additives, and microbial fermentation to reduce II -glucans and fiber content in palm kernel meal, consequently increasing its protein level and utilization. The paper outlines the research progress on the application of palm kernel meal and fermented feed in ruminants, poultry, pig, and aquaculture farming. Finally, it summarizes the recommended inclusion levels of palm kernel meal in different animals, aiming to provide insights for the development and utilization of palm kernel meal in animal husbandry. [ABSTRACT FROM AUTHOR]

The paper aims to develop a method to rapidly detect the content of tylosin tartrate. In Clark-Lubs buffer solution with pH 6.6, malachite green can induce strong resonance light scattering due to the construction of supermolecule aggregates, and tylosin tartrate can react with malachite green cations, resulting in the decomposition of supermolecule aggregates constructed by malachite green, which significantly weakens the resonance light scattering intensity of the system. The maximum detection wavelengths are at 285 nm and 332 nm. Due to the additive nature of the resonance light intensity ( I), the two wavelengths are superimposed for measurement. The linear range of tylosin tartrate is 0.2-0.6 mg/L, the linear regression equation is IRLS= 5 299 C-766.4, the correlation coefficient ( R) is 0.999 8, and the detection limit is 0.004 1 mg/L. The result indicates that the method is simple and sensitive, and can be successfully applied for the determination of tylosin tartrate. [ABSTRACT FROM AUTHOR]

The sugarcane top is one of the main by-products of sugarcane, which is rich in resources and comprehensive in nutritional value, and is one of the sources of roughage for ruminants. Silage is an effective method to preserve and develop sugarcane top feed, but the high content of carbohydrate and yeast makes natural silage easy to deteriorate, and the high content of fiber will affect the digestibility and palatability of the feeding animals. At present, the research on sugarcane top silage mainly focuses on the use of various additives, mixed silage with other materials, the effect of sugarcane top silage on ruminants, and the influence of sugarcane harvest time, varieties and silage time on silage. In this paper, the effects of additives, mixed silage and other factors on the quality, nutritional value, aerobic stability and feeding effect of sugarcane top silage were summarized, which provided reference for promoting the utilization of sugarcane top and the preparation of high-quality silage. [ABSTRACT FROM AUTHOR]

Lonicera japonica Thunb. mainly contains phenolic acids, flavonoids, polysaccharides, saponins, iridoid and other active components, which have the functions of antipyretic, anti-inflammatory, antibacterial, antiviral, antioxidant, liver protection and immune regulation. In the paper, the active components and biological functions of Lonicera japonica Thunb. are introduced, and the regulation of the active components of Lonicera japonica Thunb. on the biological barrier, immune barrier, chemical barrier and physical barrier of animal intestinal tract are reviewed, so as to provide a reference for accurate and effective use of Lonicera japonica Thunb. in animal breeding. [ABSTRACT FROM AUTHOR]

The epidermis of fish is covered with a layer of mucus secreted by epidermal mucus cells. Epidermal mucus serves as a physical and immune barrier between fish and the external water environment, and its composition and secretion are affected by the distribution, quantity, development stage of epidermal mucus cells and the changes in the external environment. With the development of the aquaculture industry both at home and abroad, the application research on fish epidermal mucus has gradually increased. In the paper, the composition, function and application of fish epidermal mucus are reviewed, in order to provide reference for the extraction, development and industrial application of the active components in fish epidermal mucus. [ABSTRACT FROM AUTHOR]

Alginate oligosaccharides are a kind of low molecular weight polymer composed of 2~10 monosaccharide molecules linked by the same or different glycosidic bonds. Alginate lyase is an important tool for the enzymatic preparation of AOS. AOS prepared by the enzymatic method is superior to AOS prepared by other methods in purity, performance and structure. In this paper, the origin, structure and enzymatic properties of alginate lyase were reviewed, and the applications of alginate lyase in aquaculture, such as feed additive, microalgae cultivation, immune regulation, antioxidant and antibacterial, were summarized. The research direction of alginate lyase and the application prospect of alginate lyase in aquaculture were prospected, which provided reference for the application of alginate lyase and AOS in aquaculture. [ABSTRACT FROM AUTHOR]

The intensive scale feeding of cattle and sheep in China co-exists with the traditional grazing mode. The traditional grazing mode is easily affected by climate, season and other factors, and the unstable forage supply and unbalanced feed nutrition become the restricting factors for the development of the cattle and sheep industry. The use of a total mixed diet can not only solve the problem of nutritional instability of cattle and sheep feed, improve production efficiency, but also make full use of agricultural and industrial by-products, protect the environment, and achieve green, healthy and sustainable development of the cattle and sheep industry. The paper reviews the research progress of the preparation principle and technology of total mixed diet and its effect on the production stage of cattle and sheep, aiming to provide a reference for the use of total mixed diet in the production of cattle and sheep. [ABSTRACT FROM AUTHOR]

The winter cold stress of dairy cows has become one of the important problems affecting the healthy development of animal husbandry. Cold stress will lead to the decrease of feed intake, milk yield and reproductive performance of dairy cows, and seriously harm the economic benefits of dairy farmers. Inner Mongolia is located in a cold region, where animals are in a cold environment for a long time, and the impact of cold stress is more common. In order to more specifically understand the effects of cold stress on the production performance of dairy cows, the paper reviews the effects of cold stress on the behavior, milk yield, neuroendocrine, biochemical indexes, immune, antioxidant function, intestinal flora and other aspects of dairy cows, and summarizes the effective prevention and control measures to prevent cold stress of dairy cows, to provide reference for further research on the prevention and relief of cold stress in dairy cows. [ABSTRACT FROM AUTHOR]

Ginseng by-products mainly include ginseng residue, and unused ginseng stems, leaves, flowers, fruits, and roots, etc. They are rich in ginsenoside, ginseng polysaccharide, and other active substances, and have a variety of biological functions such as improving immunity, anti-fatigue, bacteriostasis, and anti-virus. At present, ginseng by-products are primarily treated as waste, which not only maximize their effects but also resulting in a waste of resources. Ginseng by-products have good application prospects in animal production. Ginseng residue, as well as ginseng stems and leaves, can be used as dietary components or additives, and the ginsenoside found in ginseng stems and leaves can also serve as an adjuvant for animal vaccines. Therefore, the paper reviews the biological functions and application in animal production of ginseng by-products, to provide a reference for improving the comprehensive utilization rate of ginseng by-products and improving animal production. [ABSTRACT FROM AUTHOR]

Walnut cake and walnut meal are the by-products of walnuts after oil extraction. Walnut cake and meal are rich in nutrients such as protein and vitamins, but are high in dry matter and crude fiber. Walnut cake and meal have the advantages of large yield and low price, which can be used as a substitute for conventional protein feed in animal production, and can decrease the fodder in the premix of corresponding dosage of the trace elements and vitamins. The paper mainly reviews the nutritional value of walnut cake and walnut meal, the production process and their applications in the animal production, to provide a reference for the rational application of walnut cake and walnut meal in animal production. [ABSTRACT FROM AUTHOR]

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Peanut meal is a by-product of peanut oil extraction. It is rich in protein, soluble polysaccharides, vitamins, and other conventional nutrients, as well as a variety of functional factors, including flavonoids, antioxidant peptides, tannins, phenols, steroids, and triterpenoids. Peanut meal can be used directly as feed, and it can be processed through microbial fermentation and microbial enzyme synergistic treatment to improve the quality of peanut meal. Fermentation can make the proportion of amino acids in peanut meal more balanced, reduce or eliminate aflatoxin B1 and antinutritional factors in peanut meal. The direct substitution of peanut meal and fermentation products for part of soybean meal and fish meal in livestock and poultry feed can not only realize the reuse of peanut meal resources, but also improve the production performance of livestock and poultry, increase the economic benefits of livestock and poultry farms. Therefore, the paper introduces the nutritional composition of peanut meal, discusses its utilization in feed, its application in animal production, and its impact on the economic benefits of livestock and poultry breeding, so as to provide reference for the efficient utilization of peanut meal in the livestock and poultry breeding industry. [ABSTRACT FROM AUTHOR]

The purpose of the paper was to analyze the influence of corn 'price-subsidy separation' policy on the stability of pork supply chain, so as to maintain the stability of pork supply market. Based on the panel data of 19 major corn producing provinces in China from 2012 to 2021, the impact of corn 'price-subsidy separation' policy on the stability of pork supply chain in China was tested by double difference method. The results show that, on the basis of controlling a series of other factors, with the increase of corn price, the implementation of corn 'price-subsidy separation' policy could positively improve the stability of pork supply chain in China, and the improvement effect was about 0.042. Further study showed that the policy of 'price-subsidy separation' of corn has obvious influence on the upstream stability of pork supply chain, and the upstream stability of pork supply chain had increased by 0.106 7% after the implementation of the policy. The study indicates that 'price-subsidy separation' policy of corn can promote the stability of pork supply chain in China, and the effect is stronger in the upstream of pork supply chain. [ABSTRACT FROM AUTHOR]

Oils and fats are an important source of energy for animals and a good carrier of fat-soluble nutrients, which can participate in various life activities of the body and are widely used in animal production. With the improvement of the scale of aquaculture, many kinds of oils and fats have been used in animal diets to improve production efficiency of aquaculture. The paper reviews the research progress on the application of dietary fat in the laying poultry industry, introduces the characteristics of digestion and absorption of oils and fats in laying poultry and the nutritional effect of oils and fats on laying poultry, discusses the effects of feeding with different kinds and levels of oils and fats on laying performance, egg quality, nutrients in eggs and health of laying poultry, in order to provide reference for the efficient application of oils and fats in laying poultry feed. [ABSTRACT FROM AUTHOR]