The Journal of Agriculture and Development

●The Journal of Agriculture and Development (JAD) is a peer reviewed journal publishing novel and significant research in a wide range of topics such as Agribusiness and Economics, Agricultural Mechanics, Agronomy and Forestry Sciences, Animal Sciences, Aquaculture and Fisheries, Biotechnology, Environmental and Natural Resources, Food Science and Technology, and Veterinary Medicine. The JAD is an open access journal that includes primary research, review articles, short communications, and special invited papers. We also publish special issues which focus on the current emerging topics in agricultural sciences.

●The JAD (the formerly named Journal of Agricultural Science and Technology) is published in 6 issues per year (4 issues in Vietnamese with English abstracts and 2 issues in English). The journal has published over 19 volumes since 2002. From 06/2018, the Journal started to publish online issues in two languages (English and Vietnamese).

●Period of publication: Issue 1 (FEB), Issue 2 (APR), Issue 3 (JUN, English), Issue 4 (AUG), Issue 5 (OCT), Issue 6 (DEC, English)

●The Journal's number of articles per issue ranges from 6 to 12.

●Publisher: Nong Lam University, HCMC (NLU)

Classification of pet owners based on knowledge attitude and practice about rabies and its vaccination in Duc Hue, Long An province during the period 2021 - 2023

Bao D. Truong, Dung T. T. Nguyen, Mai T. Duong, Phuong T. H. To, Son H. Ly, Minh D. Vo, Loan P. B. Tran, Trang T. P. Nguyen, Thong Q. Le, Linh N. Nguyen, Tuyen V. Cao, Thanh Vo, Oanh T. K. Vo, & Khanh T. M. Nguyen
Electronic version: 07 May 2025 | DOI: 10.52997/jad.6.03.2024
Abstract | PDF (254.5K)

Abstract

Rabies manifests is a zoonotic ailment affecting both humans and carnivorous animals. The administration of rabies vaccination, particularly to domesticated animals such as dogs and cats, is an efficacious prophylactic measure for safeguarding the optimal health of both animal and human populations. The conscientiousness of pet owners regarding rabies vaccination significantly contributes to the effectiveness of rabies prevention initiatives. A comprehensive survey employing the Knowledge-Attitude-Practices framework was undertaken among owners of dogs and cats to appraise the efficacy of the three-year rabies vaccination program spanning 2021 to 2023 in Duc Hue district, Long An province. The primary objectives of this inquiry were to succinctly delineate the program’s outcomes and to gauge the evolution of awareness and behavioral patterns among dog and cat owners. The survey adopted a nuanced approach by categorizing participants into sub-groups, emphasizing the differentiation of outcomes across these delineated groups. Findings indicated that the vaccine coverage exceeded 80% within Duc Hue, Long An province’s dog and cat population in 2023. The analytical assessment consistently identified three to four discernible population clusters annually, based on Knowledge, Attitude, and Practice scores, focusing on their alignment with the overall mean within the population. Additionally, specific attention was directed towards clusters exhibiting lower scores, with a location and occupation. Identifying these clusters necessitates further exploration and warrants the development of more tailored communication and approach strategies to optimize the efficacy of the ongoing vaccination campaign.

Prevalence and antibiotic resistance of Escherichia coli isolated from the respiratory tract of goats in Can Tho city, Vietnam

Thuan K. Nguyen, Ninh T. K. Truong, Vy L. P. Nguyen, Trung T. Truong, & Thuong T. Nguyen
Electronic version: 07 May 2025 | DOI: 10.52997/jad.6.02.2024
Abstract | PDF (159.3K)

Abstract

A total of 319 nasal swab samples were collected to clarify the prevalence and antimicrobial susceptibility of E. coli in the respiratory tract of goats in Can Tho, Vietnam. It indicated that E. coli was detected at a relatively minor rate (8.46%), and their prevalence in male goats and dairy goats was higher than that in others. However, the ages and health conditions of goats did not affect the presence of E. coli in those goats. Those E. coli strains were still susceptible to seven examined antibiotics, but the resistance was recorded in ampicillin (25.93%) and bactrim (25.93%) in this study. Those E. coli strains (33.33%) could resist one to seven antibiotics with several patterns; the pattern of ampicillin + amoxicillin/clavulanic acid (7.41%) was more common than others. Moreover, E. coli strains harbored antibiotic-resistance genes, and blaampC was detected at the highest rate (92.11%), followed by sulII (43.86%), tetA (24.56%), and qnrA (5.26%). Of those E. coli strains, 22.81% harbored two to four examined genes with several patterns of antibiotic-resistance genes; the most detected pattern was blaampC + sulII + tetA (7.89%). Thus, controlling the prevalence of antibiotic-resistant E. coli in the respiratory tract of goats will protect animal and public health.

Optimization of alkali-catalyzed organosolv treatment of spent coffee grounds for obtaining polysaccharides

Duong T. T. Nguyen, Sang V. Nguyen, Dong N. T. Le, Anh T. V. Nguyen, & Ly T. P. Trinh
Electronic version: 07 May 2025 | DOI: 10.52997/jad.6.04.2024
Abstract | PDF (2.7M)

Abstract

The coffee industry is growing rapidly and generating increasing amounts of spent coffee grounds annually. Spent coffee grounds contain high levels of polysaccharide, which needs in-depth research to obtain and transform into value-added products. This study was carried out to optimize the alkali-catalyzed organosolv treatment of spent coffee grounds to enrich the polysaccharide content. A three-factor central composite design of the response surface model was used to optimize the treatment variables including reflux time, NaOH, and acetone concentration to yield the highest polysaccharide level. As a result, the maximum polysaccharide content was 73.13% obtained at a reflux time of 4.5 h, 62% acetone with 0.91% NaOH. The polysaccharide-rich material from spent coffee ground was composed of 39.37% mannan, 10.40% glucan, and 9.33% galactan. Partial removal of lignin and protein was observed during the treatment. Enzymatic hydrolysis of the spent coffee polysaccharides released the highest reducing sugars of 5583 mg/L using an enzyme cocktail containing 4% of cellulase and 1% of mannanase after 96 h. The enzymatic hydrolysate contained 3190 mg/L mannose and 1790 mg/L glucose, showing a feasible transformation of spent coffee polysaccharides.

Aerogel materials from sugarcane bagasse: the effect of additives

Van T. T. Le, Ty H. Nguyen, Chien M. D. Vu, & Phuong T. Nguyen
Electronic version: 07 May 2025 | DOI: 10.52997/jad.6.05.2024
Abstract | PDF (2.8M)

Abstract

Cellulose nano fibers (CNF) are being considered as potential material for producing aerogel, an advanced materials for filtration technology. In this study, CNF were extracted from the sugarcance bagasse (a common agricultural waste) using ultrasonic technology and then fabricated with different additives including polyvinyl alcohol (PVA), polyethylene glycol (PEG) and graphene oxide (GO) to formulate aerogels. Various advanced techniques including polarized and scanning electron microscopy, fourier transform infrared spectroscopy (FTIR) and texture analyzer were applied to elaborate on the physicochsemical properties of the products. The obtained results revealed that aerogel had low bulk density (0.032 kg/m3; 0.035 kg/m3 & 0.041 kg/m3) and a high porosity (96.89%; 97.06% & 98.61%) when combined with PVA, PEG and GO, respectively. Among investigated samples, aerogel fabricated with GO had the highest mechanical resistance as well as the best elasticity.

Community-based ecotourism: A case study in Thanh Phu district, Ben Tre province, Vietnam

Thinh V. D. Nguyen, Vy T. H. Nguyen, Nhi T. C. Bui, & Diem T. N. Phan
Electronic version: 07 May 2025 | DOI: 10.52997/jad.6.06.2024
Abstract | PDF (2.1M)

Abstract

This study explored the potential and challenges of community based ecotourism in Thanh Phu district, Ben Tre province, Vietnam. By investigating 52 households involved in community-based ecotourism through the Participatory Rural Appraisal method and semi-structured interviews, it outlined the transformative impact of community-based ecotourism on the local community. The research underscored positive outcomes in economic growth, social equity, and cultural preservation while highlighting the imperative need for prudent management to mitigate environmental concerns and prevent unsustainable tourism growth. It advocated for a balanced approach that integrated economic development with environmental and cultural preservation strategies. The findings emphasize the importance of tailored solutions to navigate challenges and foster sustainable community-based ecotourism, ensuring long-term prosperity while safeguarding the district’s natural and cultural treasures.
Most Read
  • Case report of brachycephalic obstructive airway syndrome in brachycephalic dogs from Veterinary Specialist Service Hospital, Australia
    Electronic version: 30 Jun 2020 | DOI: 10.52997/jad.5.03.2020
    Abstract | PDF (260.1K)

    Abstract

    This report aimed to study symptoms and causes of brachycephalic obstructive airway syndrome (BOAS) in brachycephalic dogs and to determine appropriate surgical procedures for these symptoms by reviewing literatures and examining four case studies conducted at Veterinary Specialist Service Hospital, Underwood, Queensland, Australia. The cases included a 6-year 3-month old Staffordshire Bull Terrier (case 1), a 1-year 5-month old French Bulldog (case 2), an 8-month old French Bulldog (case 3), and an 8-year 8-month Pug (case 4). Those dogs went to the Veterinary Specialist Service in a worsen state of respiratory problems, including the upper respiratory noise (case 1, 2, 3), decrease in exercise tolerance, respiratory struggling (case 1, 3), regurgitation (case 1), coughing, sleeping difficulty, respiratory stridor (case 2), nasal discharge, dyspnea, bloating, and tachypnea (case 4). Examinations revealed the causes including the elongated soft palate (case 1, 2, 3, 4), stenotic nostrils (case 2, 3, 4), tonsils inflammation (case 3) and everted laryngeal saccules (case 4). After surgery, the dogs were recovered in intensive care unit within 2 days, and then discharged. Scheduled re-examination one week later showed improvement in the respiratory health in all cases. Overall, major complications occur in 10\% of cases; however, this surgery is vital and can be totally applied in Vietnam where brachycephalic dogs have become a popular companion.
  • Influence of stocking density on water quality and growth performance of whiteleg shrimp (Litopenaeus vannamei) reared in fiberglass tanks, without water exchange
    Electronic version: 27 Dec 2019 | DOI: 10.52997/jad.3.06.2019
    Abstract | PDF (3.4M)

    Abstract

    The present study evaluated the effects of stocking density on water quality parameters, growth performance and survival rate of white leg shrimp Litopenaeus vannamei, reared in fiberglass tanks, without water exchange. Three stocking densities (50, 100 and 200 shrimp/m2) were tested. Each treatment consisted of three replicate fiberglass tanks (500 L). The shrimp were fed ad libitum four times per day with a commercial pellet (40-42% protein). After an 8-week trial, concentrations of nutrients in the culture tanks showed an increasing linear relationship with increasing stocking density. The growth performance of shrimp in low stocking densities was significantly greater than that in high stocking densities. The results from this study demonstrate that with increasing the stocking density the production of shrimp increased but n a low final weight and survival compared to low stocking density.
  • The effects of plant spacing on yield and quality of butterfly pea (Clitoria ternatea L.) cultivated in organic-oriented farming system on grey soil
    Electronic version: 30 Jun 2020 | DOI: 10.52997/jad.2.03.2020
    Abstract | PDF (260.1K)

    Abstract

    Clitoria ternatea L. is a plant species that can be used in food and pharmaceutical industry. This study was conducted to evaluate the effects of different plant spacing on the productivity and quality of butterfly pea grown on grey soil in Thu Duc, Ho Chi Minh City. Six treatments correspond to plant spacing of 80 x 15 cm, 80 x 20 cm, 80 x 25 cm, 80 x 30 cm, 80 x 35 cm and 80 x 40 cm. The results showed that the highest flower amount (296.8 flowers/plant) was obtained with butterfly pea planted at the spacing of 80 x 15 cm, commercial flower weight (7.86 g/100 flowers), theoretical yield of fresh flower (1,779.0 kg/1,000 m2, actual yield of fresh flower (841.9 kg/1,000 m2), theoretical yield of commercial flower (194.6 kg/1,000 m2 and actual yield of commercial flower (89.0 kg/1,000 m2. Nevertheless, plant spacings did not affect the dry matter ratio, anthocyanin and tannin content in the commercial butterfly flowers.
  • Optimum condition of manufacturing hybrid particleboard from mixture of cocoa pod husk and bamboo particles
    Electronic version: 28 Jun 2019 | DOI: 10.52997/jad.2.03.2019
    Abstract | PDF (260.1K)

    Abstract

    This study was to investigate the feasibility of using cocoa pod husks (CPH) and bamboo in manufacturing hybrid particle board. Three-layer experimental particle boards from mixture of bamboo and CPH participles were manufactured using different surface to core layer ratios (30, 40 and 50%) and various UF ratios for surface layer (6, 8 and 10%) and for core layer (4, 6 and 8%). Modulus of rupture (MOR), internal bond strength (IB) and thickness swelling (TS) properties of the boards were evaluated based on Standard TCVN7756:2007 Test Methods for general purpose used in dry conditions. The results showed that boards in all ratios of surface to core layer investigated could be manufactured using up till 8% UF resin for surface layer and up till 6% UF resin for core layer without falling below the minimum Standard VN7754:2007. The optimal condition was the surface to core layer ratio of 30% used with 9.51% UF resin for surface layer and 7.45% UF resin for core layer obtaining the lowest thickness swelling (TS) 11.13%. The highest values of MOR and IB were 15.25 MPa and 0.45 MPa, respectively. This study demonstrates that cocoa pod husks and bamboo waste can be an alternative raw material source for particleboard production.
  • Evaluation of different diets to replace Artemia nauplii for larval rearing of giant freshwater prawn (Macrobrachium rosenbergii)
    Electronic version: 28 Jun 2018 | DOI: 10.52997/jad.5.03.2018
    Abstract | PDF (260.1K)

    Abstract

    A study was conducted on Macrobrachium rosenbergii larvae to evaluate the efficiency of different diets to replace Artemia nauplii in the feeding scheme. The study included two experiments performed at pilot scale in 12–L tanks using a recirculating system. Larval stocking density was 100 larvae/L. After 7 days of feeding by Artemia nauplii, different diets, included wet and dry diets and decapsulated Artemia cysts, were tested to replace Artemia nauplii. An extra treatment using only decapsulated Artemia cysts throughout the complete larval rearing was also included. The results showed that feeding larvae exclusively decapsulated cysts for the complete rearing cycle was not appropriate. When gradually replacing up to 50% of the Artemia nauplii ration with wet or dry diets, good results in terms of growth, survival and quality of the larvae were obtained, similar to the control treatment receiving only Artemia nauplii. However, abruptly replacing 50% of the Artemia nauplii ration with artificial diets negatively affected larval development. Weaning could start from larval stage V, with about 25% of the Artemia nauplii replaced with artificial diet. Subsequently, the weaning ration could be increased up to 50% from stage IX to postlarva stage. Artificial diets should be provided in different particle size ranges based on the larval stage, gradually increasing from 250 to 1000 µm from stage V to postlarva stage. The results obtained in the present study may aid future research and serve as a baseline for further optimization of feeding strategies in prawn larviculture.