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The experiment was conducted to investigate the effect of adding corn flour, fiber complex enzyme on fermentation characteristic of Caragana korshinskii silage. Caragana korshinskii at full flowering stage was used as silage material, and four groups were designed according to single factor experiment design, which were no addition as control group (CK group), added 10% corn flour group (C group), added 0.05% fiber complex enzyme group (F group) and added 10% corn flour + 0.05% fiber complex enzyme group (CF group), respectively. Each group had six replicates. After 60 d of fermentation, the nutrient composition and fermentation quality of Caragana korshinskii silage were determined. The results showed that compared with CK group, the content of crude protein and soluble carbohydrate in silage of C group were significantly increased (P<0.05), and the neutral detergent fiber content of silage in C group and F group was significantly lower than that in CK group (P<0.05). The content of acid detergent fiber in C group, F group and CF group were significantly lower than those in CK group (P<0.05), and the content of neutral detergent fiber and acid detergent fiber in C group were the lowest, which were 52.64% and 37.64%, respectively. The relative feeding value of silage in C group, F group and CF group was significantly higher than that in CK group (P<0.05), and the total digestible nutrient of silage in C group and CF group was significantly higher than that in CK group (P<0.05). Compared with CK group, the pH value of silage in F group and CF group was significantly decreased (P<0.05), the lactic acid content of silage in F group and CF group was significantly increased (P<0.05), and the content of ammonia nitrogen/total nitrogen and propionic acid in C group, F group and CF group were significantly decreased (P<0.05). The content of ammonia nitrogen/total nitrogen and propionic acid in group C were the lowest, which were 1.38% and 0.66%, respectively. The number of Lactobacillus in silage in C group, F group and CF group was significantly higher than that in group CK (P<0.05), and the number of yeast was significantly lower than that in control group (P<0.05), no mold was detected in all groups. The V-Score evaluation grade of silage in all groups was good, and the scoring order of each group was C group> F group > CF group> CK group. The experiment indicates that the addition of corn flour and fiber complex enzyme can improve the nutrient content and fermentation quality of Caragana korshinskii silage, and the effect of adding 10% corn flour alone on the silage quality of Caragana korshinskii is better. [ABSTRACT FROM AUTHOR]

The high-quality development of feed industry is an inherent requirement for stable production and supply of animal husbandry, and it is also a necessary part of the construction of an agricultural power. Facing Chinese path to modernization, national policy support, scientific and technological innovation drive and market demand growth are strategic opportunities to promote high-quality development of the feed industry. The feed industry focuses on strengthening quality and safety supervision in production and sales, improving the level of international market development, and promoting the transformation and application of scientific and technological achievements, continuously accelerating the process of high-quality development. It is proposed to improve the supervision mechanism for feed quality and safety, establish an international alliance for the development of the feed industry, strengthen research and development of feed technology and achievement transformation, and create an ecological circular feed industry chain, in order to provide support for the high-quality development of the feed industry and contribute to the sustainable development of Chinese animal husbandry. [ABSTRACT FROM AUTHOR]

Promoting construction of a Chinese style animal husbandry power is an inevitable requirement for achieving modernization of agriculture and rural areas, and is also an important choice for achieving strategic goal of empowering rural revitalization. In order to accelerate the development of animal husbandry, China has taken a series of effective measures from stable production and supply, as well as financial investment, to promote the efficiency of resource utilization of livestock and poultry manure pollution and continuous improvement of production capacity of livestock and poultry products, and to promote construction of Chinese style animal husbandry power. From perspective of strategic layout, construction of Chinese style animal husbandry power should be planned in a coordinated manner from expanding domestic demand, promoting new urbanization, and creating a green development atmosphere. Furthermore, we propose countermeasures and suggestions to accelerate construction of a stable production and supply guarantee system, deepen construction of an advantageous animal husbandry industry system, and enhance construction of a technical support system, to promote construction of Chinese style animal husbandry power. [ABSTRACT FROM AUTHOR]

The experiment was to optimize the extraction conditions of polyphenol from nutmeg by ultrasonic wave and cellulase. Using nutmeg as raw material, the extraction process of polyphenols from nutmeg was optimized by ultrasonic and cellulase, and the antioxidant activity of nutmeg was studied in vitro. The results showed that the optimal extraction process was as follows: Cellulase dosage of 1.6 g/L, enzymolysis temperature of 45 ℃, ultrasonic time of 60 min and ultrasonic power of 300 W. Under these conditions, the yield of mace polyphenol was 2.962%. When the polyphenol concentration was 1.5 g/L, the DPPH· and ABTS+· clearance rates were 80.34% and 83.13%, respectively. The study indicates that the method used in the experiment has low energy consumption and high efficiency, which can provide a reference for the efficient extraction of polyphenols from nutmeg. [ABSTRACT FROM AUTHOR]