RESUMEN
Phytate content in feed ingredients can negatively impact digestibility and palatability. To address this issue, it is necessary to study microbes capable of breaking down phytate content. This study aimed to isolate and characterize phytase-producing bacteria from decaying materials rich in phytic acid. The research was conducted in several stages. The first stage involved isolating phytase-producing bacteria from the acidification of Tithonia diversifolia using growth media containing Na-phytate. Bacterial isolates that produced clear zones were then tested for their activity and ability to produce several enzymes, specifically phytase, cellulase, and protease. The next step was to test the morphological characteristics of the bacterial isolate. The final stage of bacterial identification consisted of DNA isolation, followed by PCR amplification of the 16S rRNA gene, DNA sequence homology analysis, and construction of a phylogenetic tree. Based on research, three isolates were found to produce clear phytase zones: isolates R5 (20.3 mm), R7 (16.1 mm) and R8 (31.7 mm). All isolates were able to produce the enzymes phytase (5.45-6.54 U/ml), cellulase (2.60-2.92 U/ml), and protease (22.2-23.4 U/ml). Metagenomic testing identified isolate R7 and R8 as Alcaligenes faecalis and isolate R5 as Achromobacter xylosoxidans. The isolation and characterization of phytase-producing bacteria from Tithonia diversifolia acidification resulted in the identification of two promising candidates that can be applied as sources of phytase producers. Phytase-producing bacteria can be utilized to improve digestibility and palatability in animal feed.
RESUMEN
Objective: This study aims to investigate the nutritional composition and rumen fermentation attributes of the tithonia plant (Tithonia diversifolia) treated with Lactobacillus bulgaricus bacteria at different fermentation durations and doses. Materials and Methods: In this research, an experimental approach employed a factorial pattern with two factors as treatments with three replications using a complete randomized design. The primary factor was the dose of L. bulgaricus inoculum, with concentrations at 2% and 3%. The secondary factor examined during the study revolved around the duration of fermentation, offering three time frames of 1 day, 3 days, and 5 days for analysis. The inoculum of L. bulgaricus contained 65 × 1015 CFU/ml. Results: The use of L. bulgaricus bacteria on tithonia plants (T. diversifolia) with different inoculum doses and fermentation times demonstrated a highly significant effect and significant disparities (p < 0.05). In phytic acid content, nutrient content (crude protein (CP), crude fiber, crude fat, and dry matter (DM)), and in vitro digestibility, which includes DM, organic matter (OM), CP, volatile fatty acids (VFA), NH3, and gas production. However, it did not show any significant interaction between pH and OM content. Conclusion: The optimal results of nutrient profiling and in vitro digestibility, including DM, OM, CP, rumen pH, VFA, NH3 (ammonia), and gas production, were observed when the tithonia plant (T. diversifolia) was fermented using L. bulgaricus with 3% inoculum doses and a fermentation time of 5 days.
RESUMEN
BACKGROUND AND AIM: The availability of minerals in the soil affect the mineral content of mangrove leaves. This study aimed to determine the macro- and micromineral contents in the environment and mangrove leaves (Avicennia marina) as animal feed in the coastal areas of West Sumatra, Indonesia. MATERIALS AND METHODS: In this study, soil, water, and mangrove leaves were extracted from the mangrove plant's environment. The mineral contents were determined using the atomic absorption spectrophotometer of Beijing Rayleigh Analytical Instrument Corporation (make and country of origin). The total phenol and tannin contents were determined using the Folin-Ciocalteu and hide-powder methods, respectively. RESULTS: The mineral content of the soil affected the mineral content of the plants. The soil and leaves of A. marina in the Pariaman area were richer in terms of macro- and microminerals. The soil had pH value, organic carbon content, leaf nitrogen content, phosphorus, calcium, and potassium of 5.65, 4.21%, 3.39%, 0.17%, 1.99%, and 0.54%, respectively. A. marina leaves had a total phenol and tannin contents of 24.51 mg GAE/g check the unit and 4.09%, respectively. CONCLUSION: This research showed that the mineral content in the soil in several mangrove areas in West Sumatra has a positive correlation with the mineral content in the leaves of A. marina, which have a complete mineral content. Therefore, A. marina leaves could be recommended as a mineral source for ruminants.
