Constitute Variety and Nutrient Analysis of the Different Main Plant Parts of Caragana korshinskii for Animal Feed
Zhang, Yifan ， Ding, Zhijia ， Hua, Xia ， Yang, Fuyu ， Zhou, Xin ， Xu, Yong
2025-07-06 AGRICULTURE-BASEL 2025 15(卷), 13(期), (null页)
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Caragana korshinskii, a protein-rich feed plant in arid regions, lacks comprehensive nutrient analysis. This study compared the chemical composition of its five parts (leaves, bark, twigs, branches, and stems) and evaluated protein quality through amino acid profiling and enzymatic digestion. Results showed that leaves and bark contained higher crude protein (16.6-18.6%) than stems (6.8%), with fiber components (NDF > 81% and ADF > 65%) contributing to structural rigidity. Aspartic acid dominated caragana proteins, while bark and twigs exhibited elevated proline levels. CNCPS analysis revealed leaves contained 53.3% intermediately degradable protein (PB2) versus 11.6% non-protein nitrogen (PA), whereas bark and twigs had 38.8% and 45.8% PA, respectively. Despite higher PA content, bark and twigs demonstrated superior in vitro protein digestibility (73.2% and 67.4%) compared to leaves (61.2%). The findings established baseline nutritional data, highlighting part-specific variations in protein characteristics critical for optimizing caragana's application in animal feed technology within resource-limited ecosystems.
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