数字农科院2.0

Effects Of Urtica Cannabina To Leymus Chinensis Ratios On Ruminal Microorganisms And Fiber Degradation In Vitro

文献类型： 外文期刊

作者： Zhang, ZB; Wang, S; Wang, MZ; Shahzad, K; Zhang, XQ; Qi, RX; Shi, LF

作者机构：

关键词： Urtica cannabina; Leymus chinensis; digestibility; fiber microstructure; microorganisms

期刊名称： ANIMALS

ISSN： 2076-2615

年卷期： 2020 年 10 卷 2 期

页码：

收录情况： JCR（2021版）

摘要： Simple Summary Urtica cannabina is an unconventional forage crop that has a wide distribution in northern parts of China and is rich in nutritional values. It has a considerable practical significance in cases of shortage of quality forage, such as Leymus chinensis, which is used for the growth and production of ruminants. Our study found that proper addition ratios of U. cannabina and L. chinensis can increase the fiber digestibility by modulating the rumen microbial community in vitro. We also suggest that proper addition of U. cannabina and L. chinensis ratios may be one of the nutritional strategies that can improve the digestion and absorption performance of fiber feedstuff and potentially alleviate the shortage of quality forage for ruminants. The study was conducted in vitro to investigate the effects of different ratios of Urtica cannabina and Leymus chinensis on fiber microstructure and digestibility in ruminal fluid. The experiment was divided into five groups based on the U. cannabina/L. chinensis ratios: A (0:100), B (30:70), C (50:50), D (70:30), and E (100:0). The culture medium was collected at 0, 1, 3, 6, 12, and 24 h. The results showed that: (1) in vitro crude protein degradability (IVCPD) was higher in group A, whereas in vitro neutral detergent fiber degradability (IVNDFD) was higher in group C (p < 0.05); (2) protozoa count was increased from 1 h to 3 h and decreased afterwards, with significant differences observed in several genera (p < 0.05); (3) microbial crude protein (MCP) contents at 1, 3, 6, and 24 h were higher in groups A and C (p < 0.05); (4) the basic tissue of U. cannabina was gradually degraded. At 24h, the secondary xylem vessel structure was observed in groups B and C, but not in groups D and E. In summary, there was higher neutral detergent fiber (NDF) digestibility, higher rumen MCP contents, and lower protozoa count, showing the significance of the 50:50 ratio for microbial growth and fiber digestibility.

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