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All Journal Agrivet: Jurnal Ilmu-ilmu Pertanian dan Peternakan
Mansyur
Universitas Padjadjaran
Agriculture, Biological Sciences & Forestry

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Kajian biosintesis dan akumulasi beta-karoten pada tanaman makanan ternak serta implikasinya terhadap kualitas nutrisi hijauan Syafiradewi Yulianti; Mansyur; Iin Susilawati
Agrivet : Jurnal Ilmu-Ilmu Pertanian dan Peternakan (Journal of Agricultural Sciences and Veteriner) Vol. 14 No. 1 (2026): Juni
Publisher : Fakultas Pertanian Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/agrivet.v14i1.18959

Abstract

Beta-carotene is the primary provitamin A carotenoid and natural antioxidant in forage plants, yet its biosynthesis and accumulation in tropical forages remain insufficiently characterised. This review systematically examined the biosynthetic pathways, regulatory factors, and nutritional implications of beta-carotene in forage plants using 45 peer-reviewed articles selected through a PRISMA-adapted protocol. Beta-carotene biosynthesis proceeds via the plastidial MEP pathway, with phytoene synthase (PSY) and lycopene beta-cyclase (LCYB) as principal regulatory enzymes. Accumulation varies substantially across forage species and is governed by harvest age, light intensity, temperature, and post-harvest management, with silage conserving up to 75–85% of initial beta-carotene content compared with losses of 70–90% during hay-making. In ruminants, an estimated 20–70% of ingested beta-carotene survives ruminal degradation (Wyss, 2020; Nozière et al., 2021; Calderón et al., 2020) and is subsequently absorbed and converted to vitamin A, supporting reproductive performance, immune function, and milk quality. Tropical legumes such as Leucaena leucocephala and Stylosanthes guianensis are rich beta-carotene sources, whereas data for Indonesian-specific cultivars of Napier grass, gamal (Gliricidia sepium), and indigofera (Indigofera zollingeriana) remain scarce. Strategic forage selection, optimised harvest intervals, and targeted supplementation are recommended to maximise beta-carotene delivery to ruminants under tropical conditions.
Pengaruh cecotropes kelinci terhadap kinetika produksi gas rumen in vitro Hanifah Nurhaliza Nurhaliza; Hunafa Jalwa Adiwinata; Hanafi Abdillah; Muhammad Badar; Mansyur; Muhammad Zam Zam Syakir Niami; Ahmad Naufal Jauhari; Yulianri Rizki Yanza
Agrivet : Jurnal Ilmu-Ilmu Pertanian dan Peternakan (Journal of Agricultural Sciences and Veteriner) Vol. 14 No. 1 (2026): Juni
Publisher : Fakultas Pertanian Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/agrivet.v14i1.18963

Abstract

The search for natural feed additives that can enhance ruminal fermentation efficiency has gained growing attention in sustainable ruminant production research. Rabbit cecotropes contain microbial metabolites, fermentation by-products, enzymes, and microbial biomass that may support their use as a postbiotic-rich feed ingredient. This study evaluated the effects of rabbit cecotrope supplementation on the kinetics of in vitro ruminal gas production. Four dietary treatments, namely 0% (P0 as control), 5% (P1), 10% (P2), and 15% (P3) rabbit cecotropes, were incubated using the in vitro gas production technique. Cumulative gas volume was recorded every two hours over a 24-hour incubation period and fitted to the model Y = a + b(1−e⁻ᶜᵗ), where (a) denotes gas production from the rapidly soluble fraction, (b) denotes gas production from the insoluble but fermentable fraction, and (c) denotes the fractional rate of gas production. Data were analyzed using PROC MIXED of SAS together with orthogonal polynomial contrasts. Rabbit cecotrope supplementation significantly affected all kinetic parameters (p≤0.001). Parameter (a) increased linearly from −2.53 ml in P0 to 0.52 ml in P3, while parameter (b) declined from 195.0 ml to 109.3 ml. Parameter (c) increased from 0.034 h⁻¹ in the control to 0.051 h⁻¹ in both P2 and P3. The simultaneous increase in a and c alongside the decline in b indicates a shift toward faster fermentation dynamics. These findings suggest that rabbit cecotropes have potential as a postbiotic-rich feed ingredient that can modulate ruminal fermentation kinetics.
Co-Authors Ahmad Naufal Jauhari Hanafi Abdillah Hanifah Nurhaliza Nurhaliza Hunafa Jalwa Adiwinata Iin Susilawati Muhammad Badar Muhammad Zam Zam Syakir Niami Syafiradewi Yulianti Yulianri Rizki Yanza