Full
Outline
Methionine （Met）， as an essential amino acid for ruminants， plays a critical role in production performance， reproductive efficiency， immune function， and regulation of the rumen environment. However， dietary Met is susceptible to degradation by rumen microbes， leading to insufficient absorption in the small intestine. To address this， rumen-protected methionine （RPM） is developed through coating technology or chemical modification， effectively reducing rumen degradation rates and enhancing its utilization in the small intestine. Supplementation with RPM improves ruminant production performance， optimizes rumen microbial flora， enhances nitrogen balance， boosts reproductive performance， regulates immune gene expression， and strengthens antioxidant capacity. This article systematically reviews the technological principles of RPM and its application progress in ruminant production， providing a theoretical foundation for the practical implementation of RPM.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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