Vol. 24 No. 3 (2026): Tạp chí Khoa học Nông nghiệp Việt Nam

The study was conducted to investigate the antimicrobial activity of the black soldier fly (Hermetia illucens) larva protein hydrolysates on Vibrio parahaemolyticus bacteria causing acute hepatopancreatic necrosis in white leg shrimp. The study was conducted using well diffusion and serial dilution methods that determined the minimum inhibition concentration (MIC) and minimum bactericidal concentration (MBC) of protein hydrolysates from black soldier fly larvae. In the diffuse well agar method, the results showed that at concentrations of 150 and 200 mg/ml, clear zone diameters were recorded at 13.7 ± 1.2 and 14.7 ± 0.6mm, respectively, and statistically significant different compared to negative controls. MIC values and MBC values were 50 mg/ml. The results noted that hydrolyzed protein from black soldier fly larvae was able to inhibit and kill Vibrio parahaemolyticus bacteria that cause acute hepatopancreatic necrosis disease in shrimp.

The study was conducted to evaluate the meat quality of whiteleg shrimp (Litopenaeus vannamei Bone, 1931) in culture tanks supplemented with the harmful blue-green algae (P. pseudagardhii) under laboratory conditions. The experiment consisted of four treatments: (1) Control treatment (NT1) without algae addition; (2) Treatment 2 (NT2) (6,000 ind./ml); (3) Treatment 3 (NT3) (16,000 ind./ml) and Treatment 4 (NT4) (26,000 ind./ml). The experiment was designed in 500l tank containing 250l of water of 10‰ salinity with a shrimp stocking density of 50 ind./tank. Harmful blue-green algae (P. pseudagardhii) were added to the tanks on day 63 of culture and maintained for 7 days. Each treatment was replicated three times. At the end of the experiment, shrimp samples were evaluated for flesh quality in terms of color, texture, flavor, chemical composition, and amino acid profile. The results showed that higher densities of P. pseudagardhii supplementation altered the shrimp meat quality, negatively affecting color, texture, and flavor, leading to lower sensory evaluation scores. However, there were no significant differences (P >0.05) in the chemical composition and amino acid content of shrimp flesh among treatments. Generally, higher densities of harmful blue-green algae (P. pseudagardhii) and prolonged exposure negatively affected the flavor of shrimp meat due to the presence of cyanobacterial odor.

This study aimed to evaluate the potential of reusing wastewater from super-intensive shrimp farming for cultivating the microalga (Chaetoceros muelleri) and Artemia and to evaluate the effectiveness of utilizing microalgae grown in shrimp wastewater as a supplementary feed for Artemia. Experiment 1 (Exp. 1) evaluated the growth of  C. muelleri in wastewater with four nutrient supplementation: f/2 medium (TNT+f/2), silicate containing medium (TNT+Si), medium without additional nutrients (TNT), and treated seawater with f/2 medium as the control (TĐC).  C. muelleri algae grew well and reached maximum density (26.110⁵ cells/ml) in the nutrient-supplemented treatment (f/2) (TNT+f/2) on the 3rd day of culture. Exp.2 investigated the effects of five initial Artemia stocking densities (100, 200, 300, 400, and 500 ind/L) and feeding with 2 types of microalgae cultured in different nutrient media (TNT+Si and control (TĐC) on Artemia growth after 15 days of culture. The survival rate and length of Artemia were highest (81.3%) when reared at a density of 100 individuals/L. The results demonstrate the potential to transform nutrients contained in shrimp farming wastewater into Artemia biomass through algae in the food chain and to develop environmentally sustainable aquaculture.

The present study was conducted to evaluate the ability of indirect ELISA (iELISA) method to detect antibodies against African Swine Fever Virus (ASFV) using recombinant p30 protein as the coating antigen in serum and oral fluid samples. A total of 84 paired samples (each pair consisting of serum and oral fluid collected from the same individual) were obtained, including 26 negative samples and 58 samples collected from ASF-affected herds (25 acute and 33 chronic cases). The evaluation results showed that the iELISA method achieved a diagnostic specificity of 100% for both serum and oral fluid samples without cross-reactivity or false-positive results observed. When compared with the commercial reference ELISA kit (Ingezim PPA Compac), the iELISA demonstrated high agreement in serum samples, with a concordance rate of 90.47% and a Cohen’s Kappa coefficient of 0.81. When comparing paired samples from the same individual, antibody levels in oral fluid showed a strong positive linear correlation with those in serum (r = 0.765, P <0.001), along with substantial diagnostic agreement (Kappa = 0.73). Moreover, the iELISA method in both sample matrices reflected the trend of immune response dynamics across disease stages, as indicated by an increase in S/P values from the acute to the chronic phase.

This study evaluated the efficacy of biochar application in treating industrial livestock wastes, including cattle, poultry, and swine manure, at different mixing ratios (v/v). The experiment was designed using a completely randomized design (CRD) with 3 replications. The results indicated that biochar amendment facilitated the maintenance of thermophilic temperatures above 50°C starting from the sixth day of composting, with a duration sustained for 8-12 days. At an equivalent mixing ratio, poultry manure treatments exhibited significantly higher pile temperatures compared to cattle and swine manure, as well as the non-biochar control. Regarding industrial poultry manure, a biochar mixing rate of ≥10% after 45 days of composting yielded a final product characterised by a C/N ratio <12, with limiting factors such as heavy metals (As, Pb, Cd, Hg) and pathogenic microorganisms (E. coli, Salmonella) remaining within permissible safety limits. Furthermore, this treatment enhanced the nutrient profile, achieving total nitrogen (1.85-2.10%), available phosphorus (1.45-1.63%), and available potassium (1.88-2.24%) contents superior to the control, with a calculated production cost of 1,183 VND/kg. For industrial cattle and swine manure, a biochar mixing rate of ≥ 20% after 45 days resulted in finished composts with a C/N ratio of ≤ 12 and higher concentrations of organic matter, total nitrogen, available phosphorus, and available potassium compared to the control. The production costs for these treatments were 1,206 VND/kg and 1,252 VND/kg, respectively, while all heavy metal and harmful microorganisms meet the regulations of the Ministry of Agriculture and Rural Development (2019).

In this work, an ultra-high performance liquid chromatography combined with tandem mass spectrometry was developed and validated for analysis of histamine in the Vietnamese traditional soya sauce. Histamine was separated using z-HILIC column and detected by tandem mass spectrometry employing with electrospray ionization in positive mode. Linearity of histamine ranged from 0.02 to 7.05 mg/kg with a good regression coefficiency. The limit of detection (LOD) and the limit of quantification (LOQ) were achieved 3.0 µg/kg and 11 µg/kg, respectively. Repeatability and reproducibility of the method corresponded to 2.74% and 3.74%. The recovery was investigated by spiking experiments and achieved from 82.3% to 100.1%. Analysis of histamine in 37 samples by the developed and validated analytical method, the results indicated that the concentration of histamine ranged from LOD to 70.5 µg/kg with mean value was 17.7 µg/kg. The concentration of histamine and total nitrogen content in the analyzed samples showed low correlation coefficient

With the target of implementing research activities to enhance the capacity of training in the field of electronics and semiconductor technology of Vietnam National University of Agriculture and improve students' practical skills, the Faculty of Electro-mechanics and the Faculty of Information Technology have coordinated to conduct a number of studies in this field. Through theoretical research to apply to experiments, the authors have completed a number of electronic engineering experimental modules. This article introduces the design and implementation process of experimental modules to meet the training objectives for students in the fields of Control and Automation Engineering, Mechatronic Engineering Technology. Investigation results indicate that the experimental modules have supported students to understand the operating principles of semiconductor components, increase the ability to apply knowledge in practice, stimulate creativity, be interested in learning and improve training efficiency. In addition, these modules also result in high economic efficiency thanks to low manufacturing costs but still ensuring high mechanical durability and feasibility of operation, contributing to the innovation of the curriculum at the Vietnam National University of Agriculture

This study assesses the awareness and adaptive behavior of farm households toward climate change in agricultural production across three representative ecological regions: the Red River Delta (Nam Dinh), the Central Highlands (Dak Lak), and the Mekong River Delta (Soc Trang). Primary data were collected from 764 farm households through structured interviews and analyzed using descriptive and comparative statistics. The results show that most farmers were aware of common climate change signs such as rising temperatures (72.5%) and unseasonal rainfall (53.4%), but their understanding of long-term impacts like declining farmland remains very limited (4.5%). The proportion of households applying adaptive measures such as adjusting cropping seasons or changing crop and livestock varieties was still low (22%). However, more than 86% of those who applied these measures reported moderate to high economic benefits. The main barriers to adaptation included lack of technical knowledge (68.05%), limited investment capital (69.3%), and insufficient access to government support (56.4%). The study suggests enhancing technical training, improving access to climate information and small-scale financial assistance, and integrating climate adaptation criteria into rural development programs to narrow the gap between policy goals and actual practices at the household level

This study was conducted to evaluate the current status and propose solutions to enhance the brand value of Thanh Dat Clean Rice, a product of the Thanh Dat Clean Agriculture Cooperative in Vinh Thanh Commune, Can Tho City. Data were collected from the cooperative's internal reports, surveys of 144 consumers and 28 intermediary partners, and secondary sources from the Vietnam Food Association and the General Statistics Office. The results showed out the strengths and weaknesses of key components of brand value, including brand awareness, brand perception, brand preference, and brand loyalty based on evaluation of consumers. The functions and feelings of intermediary partners about brand value were evaluated positively and negatively. The research results contribute to providing a foundation for cooperatives and agricultural enterprises in the Mekong Delta region in developing clean rice branding strategies

This study examines the factors influencing organizational culture in enterprises in Viet Hung Ward, Hanoi City. A quantitative approach was employed using 157 valid survey responses collected through face-to-face interviews. The data were processed and analyzed using regression techniques to determine the degree of impact of different factors on organizational culture. The results reveal that organizational culture is significantly associated with five key factors: leadership, business sector, community and working environment, compensation and benefits policies, and working procedures and regulations. Based on the level of influence of these factors, the study proposes practical solutions aimed at consolidating, developing, and improving organizational culture in a positive direction. These solutions are expected to enhance the competitiveness of enterprises while ensuring stable and sustainable development.

On the basis of overview of theoretical issues, the article concentrates on interpreting and developing a theoretical basis and building an analytical framework on the impact of logistics information on business performance in enterprises. Through research, logistics information in enterprises were divided into 2 main flows, namely  (i) Planning - coordination flow and (ii) Operational flow, the intersection between these 2 flows is inventory management. The basic requirement for logistics information is to ensure security, timeliness, accuracy and reliability, in order to provide useful information to logistics managers. Internal factors (business characteristics, leadership commitment, information technology infrastructure, technology qualification and acceptance of users) and external factors (government policies and support, supply chain partner technology level, competitive pressures and customer expectations) play a key role in developing and improving quality logistics information, helping to better meet the information needs of managers. Thus, logistics information contribute to improving the efficiency of supply management, inventory management, order management and transportation management, thereby improving the business performance of enterprises.

Holy basil (Ocimum tenuiflorum L.) is a medicinal plant of high economic and pharmacological value, widely used in traditional medicine and the pharmaceutical industry. With the increasing demand for raw materials, research and application of appropriate cultivation techniques to enhance yield and essential oil content are essential. This paper reviewed and analyzed studies on cultivation practices for O. tenuiflorum, including planting season, spacing density, fertilizer application rates, and irrigation management. Based on the assessment of the practical applicability of each technique, suitable cultivation approaches were proposed for the ecological and production conditions in Vietnam, contributing to cost optimization and improved production efficiency. This review provides a scientific basis for further studies to determine the optimal ratio of organic and inorganic fertilizers, as well as to evaluate the effects of fertilizer regimes and planting density on essential oil composition and the environmental sustainability of  O. tenuiflorum cultivation.

Community-based circular management of agricultural by-products has attracted growing attention in the context of small-scale agricultural production and the dispersed generation of by-products in rural areas. However, existing studies remain fragmented in terms of analytical focus, scale, and conceptual framing, limiting the comparability and synthesis of community-level models. This study adopted a systematic literature review approach, analyzing 50 academic publications and policy-related documents from national and international sources to synthesize existing approaches to community-based circular agricultural by-product management. The review indicates that the literature consistently highlighted the role of community organizations and multi-actor coordination mechanisms, the alignment between processing technologies and local scale, and the importance of supportive financial and institutional conditions in sustaining community-based models. Based on this synthesis, the paper conceptualized an analytical framework that clarifies the relationships between input conditions, operational mechanisms, and environmental and socio-economic outcomes in community-level circular agricultural by-product management

This study investigated the dynamics of CO₂ emissions in Vietnam’s industrial sector during the 2007–2022 period. The results reveal that CO₂ emissions from industry increased by 3.2 times in to 2007 compared to 2022, thereby exerting significant pressure on the environment. Using secondary data from the International Energy Agency and the national statistical authority, combined with the Logarithmic Mean Divisia Index (LMDI) method, the study identified four key drivers of rising industrial CO₂ emissions: the labor effect, the income effect, the energy structure effect, and the carbon intensity effect. In contrast, the renewable energy intensity effect played a mitigating role in reducing industrial CO₂ emissions, although its contribution remains modest. The study suggested that technological innovation, structural transformation toward services and high-tech industries, enhancement of labor productivity, and improvement in energy efficiency, along with reducing reliance on fossil fuels in production, are essential to curb CO₂ emissions in Vietnam’s industrial sector.