Volume: 56 Issue: 2
Year: 2025, Page: 268-273, Doi: https://doi.org/10.51966/jvas.2025.56.2.268-273
Received: Dec. 9, 2024 Accepted: Feb. 14, 2025 Published: June 30, 2025
The nutritional evaluation of fodder resources is essential for optimising ruminant feeding strategies. This study assessed the chemical composition, fibre fractions and CNCPS (Cornell Net Carbohydrate and Protein System) carbohydrate and protein partitioning of paddy straw, Guinea grass and Hybrid Napier (CO5). Four samples of each fodder were analysed for dry matter, crude protein, ether extract, ash, neutral detergent fibre, acid detergent fibre, lignin, starch, buffer soluble protein, non-protein nitrogen, neutral detergent insoluble protein, and acid detergent insoluble protein. Carbohydrates were fractioned into CA (soluble), CB1 (starch/pectins), CB2 (available fibre), and CC (unavailable fibre), while proteins were partitioned into PA (NPN), PB1 (rapidly degradable), PB2 (intermediately degradable), PB3 (slowly degradable) and PC (undegradable). Structural carbohydrates constituted the major portion, with CB2 as the predominant fraction across all fodders (P=0.021). The CB1 fraction varied significantly (P=0.015), with higher levels observed in Hybrid Napier and paddy straw. Protein fractionation revealed significant differences, with paddy straw exhibiting the highest PB1 fraction (P=0.001), Hybrid Napier the highest PB2 fraction (P<0.001) and Guinea grass the highest PB3 fraction. The PC fraction was highest in paddy straw (18.98%) (P<0.001), indicating greater undegradable protein content. These findings demonstrated that Guinea grass and Hybrid Napier provided higher fermentable fibre and protein degradability, while Paddy straw, though energy-dense, had a higher proportion of undegradable protein. This study underscores the utility of CNCPS fractionation in characterising fodder quality for precision livestock feeding.
Keywords: Guinea grass, Hybrid Napier, Paddy straw, CNCPS fractions
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© 2025 Lasna Sahib et al. This is an open access article distributed under the terms of the Creative Commons Attribution
4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction
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Sahib, L., Ally, K., Ajith, K.S., Chacko, B., Radhika, G. and Anil, K.S. 2024. Evaluation of chemical composition,
fibre fractions and carbohydrate and protein partitioning of paddy straw, Guinea grass, and hybrid Napier (CO5).
J. Vet. Anim. Sci. 56 (2):268-273