Open Global Scientific Journal

The Influence of Domestic Soybean Production, Consumption, Prices, and Exchange Rates on Soybean Imports in Indonesia

2025-02-06T19:08:33+07:00

Background: Domestic soybean production that has not been able to meet national soybean needs is an implication of the decline in soybean harvested area in Indonesia. The opposite condition occurs at the level of demand for soybeans, which increases every year. The soybean import policy is an alternative step for government to overcome the gap between soybean production and consumption in Indonesia. Soybeans in this study are not separated from the type, namely with HS code 1201 (Soya beans, whether or not broken).
Aims: This study aims to analyze the factors that influence soybean imports in Indonesia by using secondary data from 2001 to 2021. The research method used is descriptive quantitative.
Methods: The analysis method used is OLS which is used to determine the regression equation so that the actual value can be know from each independent variable to the dependent variable.
Results: The result of the study found that partially soybean production had no significant effect on soybean imports in Indonesia, soybean consumption had no significant effect on soybean imports in Indonesia, domestic soybeans prices had a significant effect on soybeans imports in Indonesia, the exchange rate had no significant effect on soybean imports in Indonesia, and simultaneously all free variable had a significant effect on soybean imports in Indonesia.

The Role of Vitamin C, Vitamin E and Zinc Supplementation in Enhancing the Resilience of Cultured Fish to Environmental Stress: A Systematic Literature Review

2025-06-23T10:08:38+07:00

Background: The modern aquaculture industry faces serious challenges from environmental stressors such as temperature fluctuations, deteriorating water quality, and high stocking densities, all of which negatively affect cultured fish's growth and immune competence. Micronutrient supplementation—particularly vitamin C, vitamin E and zinc—has enhanced fish resilience to these stressors.
Aims & Methods: This article was prepared using a systematic literature-review approach on the effectiveness of vitamin C, vitamin E and zinc in strengthening the antioxidant and immune systems of fish. A systematic literature search was conducted for articles published within the last ten years in Scopus‐or SINTA‐indexed journals that examined the effects of these micronutrients on the physiological and immunological performance of cultured fish.
Results: The evidence indicates that vitamin C at 200–400 mg kg⁻¹ feed, vitamin E at 50-100 mg kg⁻¹ feed and zinc at 30–80 mg kg⁻¹ feed elevate antioxidant-enzyme activity, improve tissue histology, and boost non-specific immune responses. Several species have documented positive outcomes, including Oreochromis niloticus, Clarias batrachus, and Rachycentron canadum. Nevertheless, inter-species variability, interactions with other nutrients, and limited molecular-level studies remain challenges. Further research is required to establish optimal dosages, clarify specific mechanisms of action, and design practical supplementation strategies for sustainable intensive aquaculture.

The Effect of Turmeric Powder Supplementation in Feed on Broiler Chicken Performance

2025-05-30T15:47:10+07:00

Aims: This study aimed to evaluate the effect of turmeric (Curcuma longa) powder supplementation in the diet on the production performance of broiler chickens, including feed intake, body weight gain, and feed conversion ratio (FCR).
Methods: The experiment was arranged in a Completely Randomized Design (CRD) with four treatments: P0 (no turmeric powder), P1 (1% turmeric powder), P2 (2% turmeric powder), and P3 (3% turmeric powder), each with three replications.
Results: Statistical analysis showed that turmeric powder supplementation had no significant effect on feed intake (P > 0.05), with average intake ranging from 1262.67 to 1266.33 g/bird. However, turmeric supplementation had a significant effect (P < 0.05) on body weight gain and FCR. The P1 treatment (1% turmeric powder) resulted in the highest final body weight (1172.33 ± 2.01 g/bird) and the lowest FCR (1.0777 ± 0.02), indicating improved growth efficiency and feed utilization. Based on these findings, it can be concluded that turmeric powder supplementation up to 3% in the diet can enhance the growth performance of broiler chickens, with 1% being the most optimal level of supplementation, as there were no significant differences observed among the 1%, 2%, and 3% treatments.

Effect of Vermicompost and Rice Husk Ash as an Organic Growing Media on Rice Seedling and Mat Quality in Tray Nursery

2025-07-12T00:18:50+07:00

Background: Efficient mechanized rice transplanting depends on both the structural integrity of seedling mats and the physiological quality of the seedlings. To address this need, enhancing seedling and mat through organic growing media is essential for optimizing mechanized rice transplanting.
Aims & Methods: This study aimed to evaluate the effects of organic amendments on seedling quality (seedling height, biomass, and plant population) and mat characteristics (thickness, weight, rolling score and diameter) in tray nursery. A randomized complete block design with three replications was employed, testing four treatments: alluvial soil without organic amendment (CO), with vermicompost (V), with rice husk ash (R), and with vermicompost and rice husk ash (RV).
Results: The results showed that the rice seedling nursery using a mixture of soil and organic growing media (R, RV, and V) produced better seedling quality compared to CO including seedling height, biomass, and plant population. Regarding mat performance, RV produced the thickest (1.77 cm) and lightest (3.27 kg) mats, aligning with ideal conditions for mechanical transplanting. In contrast, CO mats were the heaviest (4.40 kg), and V produced the thinnest mats (1.40 cm). Rolling quality was highest in CO (score 10), while RV mats showed lower rolling integrity (score 6.7). V treatment achieved the smallest roll diameter (13.87 cm), facilitating better handling and transport. Overall, the results demonstrate that organic amendment selection significantly affects both physiological seedling traits and the physical integrity of seedling mats. The RV treatment offered the most balanced improvement in mat structure and seedling growth, making it a promising option for mechanized rice production.

Effectiveness of Bilimbi (Averrhoa bilimbi) and Lantana (Lantana camara) Leaf Extracts as Botanical Insecticides for Controlling Maize weevil (Sitophilus zeamais)

2025-06-24T19:05:23+07:00

Background: Reduced production due to post-harvest pest attacks is a significant issue. Post-harvest pest control is crucial, and botanical pesticides are currently a primary option for post-harvest pest control. Bilimbi leaves (Averrhoa bilimbi) and lantana leaves (Lantana camara) contain active ingredients that have the potential to control the maize weevil (Sitophilus zeamais).
Aims: This study aimed to determine the effect of bilimbi and lantana leaf extract on the Sitophilus zeamais population and the quality of maize seeds in storage, and to obtain the best concentration of bilimbi and lantana leaf extract in suppressing the Sitophilus zeamais population so that it can maintain the quality of maize seeds in storage.
Methods: The experiment was arranged in a Completely Randomized Design (CRD) consisting of 7 treatments and 4 replications: control/no treatment (K), bilimbi leaf extract concentration of 3% (B1), 6% (B2), 9% (B3), and lantana leaf extract concentration of 3% (T1), 6% (T2), and 9% (T3). The variables observed were the Sitophilus zeamais population, germination power, and maize seed vigor index.
Results: The results showed that various concentrations of bilimbi and lantana leaf extracts were effective in maintaining maize seed quality, particularly in terms of seed vigor index. The 9% concentration of bilimbi and lantana leaf extracts is best at suppressing Sitophilus zeamais.

Development of Sustainability Instruments for Waste Alms Program (Sedekah Sampah) for Community Based Solid Waste Management in Sleman Regency, Yogyakarta

2025-08-04T17:36:20+07:00

Background: Community-Based Waste Management Programs have been carried out in various regions in Indonesia, including Waste Alms (sedekah sampah). However, some waste management in Indonesia is no longer active without knowing the cause. Therefore, it is necessary to conduct a sustainability assessment to identify areas for improvement. To carry out the assessment, a sustainability instrument is needed as an assessment tool.
Aims & Methods: This research aims to compile sustainability instruments and conduct trials of these instruments. Sustainability instruments are based on five aspects of community-based waste management and consist of 18 assessment indicators and assessment parameters. The instrument is compiled based on several references obtained. The locations used for the trial of this sustainability instrument are six waste alms locations in Sleman Regency. The calculation method used to determine the sustainability class and calculate the total value is the weighting method.
Results: The results of the sustainability instrument trial were obtained. The Sido Rukun Waste Alms scored 74%, the Taruna Bakti Waste Alms scored 75%, and the Sedyo Luhur Waste Alms scored 71%. The three waste alms are included in the sustainable class. Meanwhile, the Rukun Makmur Waste Alms, the Rukun Lestari Waste Alms, and the Permata Waste Alms all receive scores of 83%. These three waste alms are included in the very sustainable class. The results of the sustainability instrument trial indicate that the sustainability instrument prepared can be used for the assessment of waste alarms in the future.