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All Journal Jurnal Ilmu-Ilmu Peternakan (Indonesian Journal of Animal Science) Journal of the Indonesian Tropical Animal Agriculture Jurnal Ilmu Produksi dan Teknologi Hasil Peternakan Tropical Animal Science Journal
L. Abdullah
Department of Nutrition and Feed Technology, Faculty of Animal Science, Bogor Agricultural University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Energy Veterinary Other

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Journal : Tropical Animal Science Journal

 1 
Shade Selection of Indigofera zollingeriana Miq Putative Mutant: Evaluation of Plant Growth, Biomass Production, Nutrient Contents, and In Vitro Digestibility Royani, J. I.; Abdullah, L.; Sudarsono; Aisyah, S. I.; Hardianto, D.; Negoro, P. S.; Purba, R. D.; Azahra, B. S.
Tropical Animal Science Journal Vol. 48 No. 2 (2025): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2025.48.2.120

Abstract

The use of gamma rays to improve Indigofera zollingeriana is beneficial for developing new superior varieties with genetic characteristics inheritable by other generations. During the development, selecting genotypes from I. zollingeriana putative mutant under shaded conditions can create stable shade-tolerant varieties, with the potential to be developed into new cultivars. Therefore, this study aimed to explore the selection of I. zollingeriana putative mutant in the M2 generation for assessing and evaluating plant growth performance, biomass production, as well as nutrient content and digestibility under shading. Seedlings of 10 I. zollingeriana putative mutants along with 2 control plants, were subjected to 5 levels of shade, namely 0%, 55%, 65%, 75%, and 85%, to identify genotypes with shade tolerance. The results showed that shading significantly (p<0.05) increased plant height, chlorophyll content, leaf length, and leaf width, but decreased the number of leaves, nodes, stem diameter, and branches, also leading to decreased biomass production, high nutritional content, and improved digestibility values. Genotypes R4.10 and R5.10 showed enhanced plant growth, stable biomass production, and increased nutritional content, with low digestible neutral detergent fiber (dNDF), and higher in vitro true digestibility (IVTD) values compared to control under shaded and unshaded conditions. The identified superior genotypes are promising for breeding programs and practical application in agroforestry or silvopasture systems.
Silage Quality, Rumen Fermentation Characteristics, and Nutrient Digestibility of Sorghum bicolor cv. Samurai 1 Harvested at Different Maturity Stages Treated with Fibrolytic Enzyme Ratnaningtyas, F. A.; Abdullah, L.; Kumalasari, N. R.; Ernawati, A.; Ridla, M.; Diapari, D.; Karti, P. D. M. H.
Tropical Animal Science Journal Vol. 48 No. 3 (2025): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2025.48.3.211

Abstract

The Samurai 1 variety is a genetically mutated strain with superior agronomic characteristics and enhanced nutrient content. This study aimed to evaluate the effect of harvest maturity stages and fibrolytic enzyme (Sunsonzyme) treatment on the nutrient value, fermentative quality, and nutrient digestibility of Sorghum bicolor cv. Samurai 1 silage. The silage quality was assessed using a completely randomized design with a 3 x 3 factorial arrangement. Sorghum was harvested at three different maturity stages, namely 85, 90, and 95 days, with fibrolytic enzyme added at 0%, 0.025%, and 0.05% of the dry matter. In vitro fermentability and digestibility were evaluated using a randomized block factorial design, which was also based on the same three harvest stages and enzyme levels. Observed variables included the nutrient composition of the sorghum, physical characteristics and nutrient content of the silage, as well as in vitro fermentability and digestibility. The results showed a significant interaction between harvest maturity and enzyme level on lactic acid production and total volatile fatty acid (VFA). Harvest age significantly affected (p<0.05) all variables, while the treatment of fibrolytic enzyme significantly increased ammonia (NH₃) and total VFA concentrations, as well as reduced the fiber fraction of the silage (p<0.05). The harvest age of 90 days showed the best quality in terms of nutrients, silage, and rumen fermentability. The addition of enzyme levels up to 0.05% improved the fermentative quality of silage, reduced fiber fractions, and enhanced rumen fermentability.
Morphology, Biomass, and Forage Quality of Sorghum bicolor cv. Bioguma-2 Treated with Soil Ameliorants on Post-Coal Mining Land Kuswoyo, A.; Abdullah, L.; Karti, P. D. M. H.; Human, S.; Rostini, T.; Mulyono, E. E.; Wawan, E.
Tropical Animal Science Journal Vol. 48 No. 6 (2025): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2025.48.6.545

Abstract

Reclamation of post-coal mining land is a valuable opportunity for transforming the land into agricultural cultivation of forage crops for livestock feed production. We conducted an experiment in the Asamasam coal mining spot, Tanah Laut Regency, South Kalimantan, to investigate the effect of some soil ameliorant materials, and Sorghum bicolor cv. Bioguma-2 (Bioguma-2 sorghum) on morphological characteristics and biomass production. Seven soil ameliorant treatments were tested: control (P0), single applications of humic acid (P1, 28 L ha⁻¹), dolomite (P2, 5.8 t ha⁻¹), and organic compost (P3, 15 t ha⁻¹), and treatment combinations of humic acid + compost (P4), dolomite + compost (P5), and humic acid + dolomite + compost (P6) with the same doses of P1, P2, and P3. The data were subjected to analysis of variance, and any significances between treatments were analyzed by Duncan’s Multiple Range Test. The results indicated that the combined ameliorant materials improved morphological characteristics and biomass production. Treatment P6 showed the highest effectiveness on soil quality, plant survival rate, most morphological traits, and all yield parameters, followed by other treatments with comparatively lower performance. P6 produced the highest crude protein content across treatments. The combination of multi-ameliorants (humic acid, dolomite, and organic compost) is more effective than single ameliorants in improving soil quality, plant survival, morphological traits, and biomass yield of Sorghum bicolor cv. Bioguma-2 on post-coal mining land. These results indicate that using combined soil ameliorants is a promising strategy to enhance forage crop production on degraded mining soils. However, natural declines in plant performance during later harvest stages suggest the need for further nutrient management to sustain productivity over time.
Gamma Irradiation-Induced Changes in Morphology, Nutritional Traits, and In Vitro Digestibility of Pennisetum purpureum cv. Mott on Post-Gold Mining Soil Putra, B.; Karti, P. D. M. H.; Abdullah, L.; Prihantoro, I.; Wirnas, D.; Gopar, R. A.
Tropical Animal Science Journal Vol. 49 No. 1 (2026): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2026.49.1.88

Abstract

Post-mining lands, especially abandoned gold mining areas, present serious challenges for agriculture and forage cultivation due to poor soil fertility, heavy metal contamination, and damaged soil structure. To address these issues, this study evaluated the impact of gamma irradiation on the agronomic traits, nutritional content, anatomical characteristics, and in vitro digestibility of dry matter, organic matter, and fiber fractions of Pennisetum purpureum cv. Mott grown on degraded post-gold mining soil. A completely randomized design was used, applying seven doses of gamma rays (0, 5, 10, 15, 20, 25, and 30 Gy). Initially, irradiated plants were cultivated under optimal soil conditions. Selected cuttings were then transplanted onto post-mining soil for two months. Variables observed included growth performance, proximate composition, fiber fractions, macro minerals, and digestibility (dry matter digestibility [DMD], organic matter digestibility [OMD], in vitro digestibility [IVD], neutral detergent fiber digestibility [NDFD], acid detergent fiber digestibility [ADFD], cellulose digestibility [CeD], hemicellulose digestibility [HmD]). Results showed that a moderate dose of 10 Gy significantly enhanced dry matter digestibility, in vitro digestibility, and fiber degradation, accompanied by increases in crude protein and mineral levels. Anatomically, beneficial changes such as thicker mesophyll and vascular tissues were observed at this dose. While the 20 Gy dose also showed improvements in some fiber digestibility parameters, it did not provide an optimal balance with productivity, which was better achieved at 10 Gy. Multivariate analysis revealed distinct treatment clustering, reflecting physiological responses to irradiation. Cultivars treated with 10 Gy exhibited an optimal balance between productivity and forage quality. These findings suggest that gamma irradiation can successfully induce advantageous mutations, improving both adaptability and nutritional value of P. purpureum on marginal soils. In particular, a dose of 10 Gy is promising for breeding superior forage cultivars for the reclamation of post-mining land.
Co-Authors A. Ernawati A. Fuah M. Fuah A. M. Fuah, A. M. A. Saefuddin A. Yani Aisyah, S. I. Al Zahra, W. Anuraga Jayanegara Arum, I. Azahra, B. S. B. P. Purwanto C. SUMANTRI D. A. Astuti D. Diapari, D. Desta Wirnas Gopar, R. A. Habaora, F. Hardianto, D. I. Prihantoro, I. Jatnika, A. R. Kuswoyo, A. M. Yamin Muhammad Ridla Mulyono, E. E. N. R. Kumalasari Nahrowi Nahrowi Negoro, P. S. P. D. M. H. Karti Purba, R. D. Putra, B. R. Priyanto R. Saepudin Ratnaningtyas, F. A. Royani, J. I. S. Hadisoesilo S. Human Sudarsono Suharlina Suharlina Sumiati Sumiati T. Rostini, T. Wawan, E.