Hue University Journal of Science: Agriculture and Rural Development

Impact of Dicarboxylic acid polymer–coated p fertilizer and lime on p use efficiency and rice productivity in acid sulfate soils

Phuong Ngoc Ngo — 2026-08-25

This study aimed to evaluate the effects of lime application and phosphorus (P) fertilizer coated with dicarboxylic acid polymer (DCAP) on soil pH, available P (AP), rice growth, yield, and PUE. A pot experiment was conducted in a completely randomized design with two factors: lime (0 and 1.5 t CaO ha⁻¹) and P fertilizer (kg ha⁻¹) (0; 20 P₂O₅; 20 P₂O₅–DCAP; 40 P₂O₅; and 40 P₂O₅–DCAP), with four replicates per treatment in a greenhouse at the College of Agriculture, Can Tho University, from March to June 2025. The results showed that lime application increased soil pH and AP, thereby improving rice growth and yield. P fertilization significantly enhanced plant height, tiller number, biomass, yield components, and total P uptake. The treatment with 40 kg P₂O₅–DCAP ha⁻¹resulted in the highest soil AP, total P uptake, and grain yield. In addition, soil AP showed a significant positive correlation (r = 0.73−0.92) with rice yield and total P uptake. The combination of 1.5 t CaO ha⁻¹ and 40 kg P₂O₅–DCAP ha⁻¹ produced the highest rice yield.

Integration capacity and ability to adapt to globalization among rice-farming households in Hue City

Hang Do Thi — 2026-08-07

In the context of globalization and international economic integration, Vietnam’s agriculture is transitioning from small-scale production to market-oriented commodity production integrated into global value chains. Global integration has expanded opportunities for market expansion, investment attraction, and technology transfer. However, the integration capacity and adaptive capacity of farming households in agricultural production have remained limited. This study examined the level of participation in agricultural value chains and the adaptability to globalization of rice-farming households in Hue City. The research surveyed 130 rice-farming households, complemented by two focus group discussions and in-depth interviews to collect data in the study area. The findings reveal that rice-farming households are undergoing in a transitional stage toward market-oriented production but had not yet deeply engaged in globalization processes. Production is still predominantly small-scale, and their capacity to adapt to globalization remains constrained. Based on these findings, the study proposed several solutions, including strengthening value chain linkages, promoting digital transformation, improving quality standards, and enhancing policy support mechanisms to strengthen the integration capacity of rice-farming households in the context of globalization.

Effect of biochar types and rates on HT1 rice variety in net house condition in Hue City

Quang Long Trần — 2026-09-07

The objective of this study was to determine the suitable type and dosage of biochar derived from agricultural and forestry by-products for the growth and yield of the HT1 rice variety, as well as to improve certain soil chemical properties under net-house conditions in Hue city. A two-factor experiment was conducted using four types of biochar (rice straw, rice husk, sawdust, rice straw + rice husk + sawdust (ratio 1:1:1)) and four biochar concentrations (0 - control, 1.25, 2.50, 3.75 g/kg soil) . The results showed that the types and rates of biochar affected growth indicators such as plant height, leaf area, SPAD index, fresh and dry biomass of rice stems, leaves and roots, as well as rice yield. Applying biochar (2,50 g/kg soil in the type of biochar from rice husk and combined rice husk, rice straw and sawdust) resulted in 45% and 47% higher rice yields compared to no biochar application. Biochar supplementation also improved some soil chemical properties, especially at rate of 3,75 g/kg soil at 4 types of biochar application. Further field research is needed to comprehensively evaluate the effectiveness of biochar types and rates on the yield of HT1 rice variety, economic efficiency, and soil properties in the future.

Clinical signs, gross pathological lesions, and hematological changes in chickens infected with Leucocytozoon spp. in Quang Ninh Province

Anh Tuyen Tran — 2026-08-27

Leucocytozoonosis caused by Leucocytozoon spp. is one of the most common hemoparasitic diseases in free-range chickens in Vietnam. This study was conducted to evaluate the clinical signs, gross pathological lesions, and hematological alterations associated with the disease in Ho crossbred chickens raised under free-range conditions in Binh Khe and Yen Tu wards, Quang Ninh province. A total of 79 chickens positive for Leucocytozoon spp. were monitored from October 2025 to April 2026. The results revealed that the typical clinical signs included pale comb and wattles (91.10%), emaciation and stunted growth (79.70%), and greenish diarrhea (75.90%). The most prominent gross lesions were watery blood difficult to clot (92.80%), enlarged liver with hemorrhagic spleen (85.70%), and greenish intestinal contents (80.90%). Hematological examination showed that infected chickens suffered from severe normocytic normochromic anemia (markedly decreased RBC, HGB, and HCT), a significantly elevated total leukocyte count (245.73 × 10⁹/L), and a markedly reduced platelet count (15.43 × 10⁹/L) compared with healthy chickens (P < 0.05). The study provides the first comprehensive and detailed scientific data on Leucocytozoonosis in free-range chickens in Quang Ninh province, offering an important basis for early diagnosis and effective prevention and control measures in practical poultry production.

Approaches to sustainable development in agricultural cooperatives: a review study

Tran Tieu Phung Nguyen — 2026-08-25

This study systematizes theoretical approaches and proposes an analytical framework for the sustainable development of agricultural cooperatives. A narrative literature review combined with thematic content analysis was applied to 79 publications , predominantly published during the period 2000–2026. The findings show that agricultural cooperatives, both conduct business activities and serve the interests of their members and communities. Accordingly,their sustainable development is examined from two perspectives: (1) the economic, social, and environmental outcomes that cooperatives generate for members and communities, and (2) their internal capacities including organizational capacity, financial capacity, and transformative capacity, which enable them to sustain operations,and achieve long term development. Previous studies have generally focused either on sustainability outcomes on individual groups of capacities without integrating these elements into a unified analytical framework. On this basis, the study proposes an analytical framework that integrates the operating context, the internal capacities of cooperative, and sustainable development outcomes. The framework contributes the theoretical foundation of agricultural cooperative sustainability while help identify priorities for cooperative governance and policymaking.

Assessment of agricultural land loss under the impact of urbanization in Eastern Ho Chi Minh City, Vietnam

Thi Thuan Nguyen — 2026-08-27

Agricultural land is increasingly threatened by urbanization, particularly in rapidly developing areas. This study evaluates agricultural land loss in response to urbanization in eastern Ho Chi Minh City during the period 2015-2025. The analysis was based on land use status maps from 2015, 2020, and 2025. GIS technology was used to standardize land-use classes and analyze land-use changes. Agricultural land loss was then quantified using three indicators: Agricultural Land Loss Rate (ALLR), Annual Agricultural Conversion Rate (AACR), and the Contribution Index of urbanization to agricultural land loss ( ). The results show that agricultural land decreased from 4,407.9 ha in 2015 to 3,457.9 ha in 2025, representing a reduction of 950.1 ha. Most converted agricultural land was transformed into built-up land (874.3 ha) and transportation land (198.9 ha). The exceeded 95% in both study periods, indicating that urbanization was the main driver of agricultural land loss. These findings provide a scientific basis for land management and sustainable urban development in the study area.

Antimicrobial susceptibility profiles and multiple antibiotic resistance indices of Streptococcus agalactiae isolated from Red tilapia (Oreochromis sp.) farmed in three representative regions of Vietnam

Thanh Thủy Nguyễn — 2026-09-08

This study evaluated the antimicrobial susceptibility profiles of Streptococcus agalactiae isolates obtained from red tilapia (Oreochromis sp.) farmed in Hai Phong City, Hue City, and An Giang Province, Vietnam. A total of 21 S. agalactiae isolates were identified based on morphological and biochemical characteristics and 16S rRNA gene sequencing. All isolates were susceptible to tetracycline, clarithromycin, azithromycin, chloramphenicol, ampicillin, amoxicillin/clavulanate, cefotaxime, cephalexin, penicillin, and lincomycin. In contrast, resistance to florfenicol (FLO) and trimethoprim/sulfamethoxazole (SXT) was detected in all three study regions, with SXT showing the highest resistance rates, ranging from 28.57% to 42.86%. Multidrug-resistant isolates were detected only in Hai Phong and An Giang, with a higher Multiple Antibiotic Resistance (MAR) index than that observed in Hue, suggesting that antimicrobial selection pressure may be greater in these two regions. These findings provide a scientific basis for the prudent use of antimicrobials and contribute to the development of effective strategies for managing S. agalactiae infections in farmed red tilapia in Vietnam.

Reproductive performance of yellow and crossbred (Brahman × Yellow) cows inseminated with brahman bull semen, offspring growth, and production efficiency in small household in Hue City

Kongvilay Sayasane — 2026-08-28

This study was conducted to evaluate the reproductive performance of Yellow cows and crossbred cows (Brahman × Yellow) inseminated with Brahman semen, the growth of their offspring, and the production efficiency of households raising Brahman × Yellow (BrV) cattle and Brahman × (Brahman × Yellow) (BrBrV) cattle in Hue City, Vietnam. A total of 50 households from each production system were surveyed to assess household characteristics, herd size, and production efficiency. Reproductive performance was evaluated in 97 Yellow cows and 85 (Brahman x Yellow) crossbred cows. The results showed that the two household groups did not differ significantly in family size or agricultural land area (p>0.05), whereas the total landholding of BrV households was significantly larger than that of BrBrV households (p<0.05). Herd size was similar between the two groups (P>0.05). Calving interval was comparable between the two groups (p>0.05). At 18 months of age, male and female offspring from the (Brahman x Yellow) cross reached average body weights of 261.7 kg and 217.4 kg, respectively, whereas those from the (Brahman x (Brahman x Yellow) cross reached 282.6 kg and 241.1 kg, respectively. The evaluation of production efficiency indicated no statistically significant differences between the two household groups (p>0.05); however, BrBrV households showed a tendency toward higher production efficiency per unit of land area or per animal unit. These findings suggest that increasing proportion of Brahman genetics has greater potential to improve offspring growth performance and overall production efficiency in smallholder cattle production system in Hue city.

Assessment of the registration of security interests over land use rights and ownership of land-attached assets in Huong Tra Ward, Hue City

Van Binh Nguyen — 2026-09-07

This study assessed the implementation of security interest registration involving land use rights and ownership of land-attached assets, as well as citizens’ satisfaction with these services in Huong Tra Ward, Hue City. Secondary data on registration results during 2021–September 2025 were collected from the Huong Tra Regional Branch of the Land Registration Office. Primary data were obtained through a questionnaire survey of 96 residents who had completed the procedures and in-depth consultations with 10 registration officers and 10 employees of local credit institutions. The results showed that 3,674 security interest registration applications were processed during 2021–September 2025, primarily comprising mortgage registrations (56.64%) and mortgage deregistrations (43.03%). Overall, respondents rated the registration services from “Satisfied” to “Very satisfied.” Those who completed the procedures from July to December 2025 (Group 2) tended to give higher ratings than those who completed them before July 2025 (Group 1) regarding service accessibility, administrative procedures, and service outcomes. The study proposed several measures to improve the effectiveness of security interest registration at the local level, focusing on upgrading equipment, improving application guidance and complaint handling, enhancing data interoperability, and strengthening coordination among relevant stakeholders.