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)

Effects of 6-benziladenine, thidiazuron, and 1-naphthaleneacetic acid on the in vitro callus formation and shoot multiplication from leaves of Mai vang (Ochna integerrima) HD01 line

Kiet C. Nguyen, Duy M. Pham, Van H. Phan, Tri M. Bui, & Hau T. Le
Electronic version: 23 Dec 2024 | DOI: 10.52997/jad.6.01.2024
Abstract | PDF (2.1M)

Abstract

Mai vang (Ochna integerrima (Lour.) Merr.) not only is a popular ornamental plant but also possesses numerous valuable herbal properties. An exceptional line, the HD01, was bred by adept florists at the Binh Loi Mai village, Ho Chi Minh City. The objective of this research was to determine the optimal 6-benziladenine (BA), thidiazuron (TDZ) and 1-naphthaleneacetic acid (NAA) concentrations appropriate for callus formation from leaf samples and regeneration of shoots from callus of the HD01 cultivar in in vitro condition. The study including two experiments was arranged in a completely randomized design with one factor and two factors, respectively. For callus induction, the culture medium supplemented with concentrations of TDZ combined with concentrations of NAA was used, while to induce shoots, concentrations of BA combined with concentrations of NAA were added to the medium. The results indicated that 0.2 mg/L TDZ combined with 0.25 mg/L NAA on the base of MS (Murashige and Skoog) medium supplemented with 7 g/L agar and 30 g/L sugar gave 100% callus formation rate after 17.6 days, with the largest callus diameter (2.7 cm) and highest callus mass (2.4 g) after 60 days of culture. The leaf-derived callus produced the best results when cultured on MS medium supplemented with 7 g/L agar, 30 g/L sugar, and a combination of 1 mg/L BA and 0.25 mg/L NAA, forming shoot clusters with the height of 2.2 cm, an average of 8.5 shoots per cluster and 9.7 leaves per cluster after 60 days of culture. Based on these results, a preliminary protocol for Mai vang HD01 micropropagation was established.

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: 23 Dec 2024 | 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.

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: 23 Dec 2024 | 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.

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: 23 Dec 2024 | 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.

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: 23 Dec 2024 | 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.
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  • 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.
  • Field assessment of the efficacy of M.B., LIBDV and Winterfield 2512 strain vaccines against infectious bursal disease in chickens
    Electronic version: 31 Dec 2018 | DOI: 10.52997/jad.3.06.2018
    Abstract | PDF (260.1K)

    Abstract

    Live virus vaccines are very important parts of the prevention of Infectious Bursal Disease (IBD) in chickens. However, the successful IBD vaccination depends on IBD field pressure, vaccination technique, the immune status of the chicken, and especially IBDV strains used in the vaccines which are able to break through a higher level of maternal-derived antibodies (MDA). The objective of this field study was to compare the efficacy of a new vaccine based on M.B. strain to other commercial vaccines (LIBDV and winterfiled 2512) in terms of speed of antibody immune response and interference to Newcastle Disease (ND) vaccination. Six houses of broilers, each with 15,000 to 16,000 chickens, were divided into two groups: (1) vaccinated with M.B. strain (group A) and (2) vaccinated with LIBDV or 2512 strains (group B). Blood samples were collected prior to the 1st IBD vaccination, and at 21, 28 and 35 days of age for IBD and ND antibodies. Comparison of lesion scores and uniformity of the bursa of Fabricius (BF) at 28 and 35 days of age was carried out. Results showed that both groups had good immune responses, but group A showed significantly higher IBD antibody titers at 28 and 35 days of age. Antibody titers for ND and histopathological lesion scores of the BF were not significantly different between the 2 groups. The BF in group A was more uniform and had fewer lesions when compared with that in group B. In conclusion, the IBD vaccine with an M.B. strain can provide better immunological efficacy than LIBDV and 2512 strains.
  • Fish composition in Dong Nai biosphere reserve in Vietnam
    Electronic version: 27 Dec 2019 | DOI: 10.52997/jad.5.06.2019
    Abstract | PDF (317.1K)

    Abstract

    Dong Nai biosphere reserve (DNBR) is well known for its high level of biodiversity and of global meaningful ecosystem. The fauna includes 84 species of mammals belonging to 28 families, 10 orders; 407 bird species; 141 reptile and amphibian species; 175 fish species; 2,017 insect species. The fish fauna of DNBR maintains many rare and endangered fish species recorded in the Vietnam red book and international union for conservation of nature red list (IUCN's red list) such as Scleropages formosus and many other rare fish species, such as Morulius chrysophekadion, Chitala ornata, Probarbus jullieni, Cyclocheilichthys enoplos... This study was aimed to identify fish composition distributed in DNBR. After the sampling period (01/2019 to 08/2019), a total of 114 fish species belonging to 11 orders and 28 families were recorded in DNBR. There were 09 species of fish on the list of rare and endangered fish species of Ministry of Agriculture and Rural Development of Vietnam, 3 species (Chitala ornata, Cosmochilus harmandi and Hemibagus filamentus) on the Vietnam red list book; 01 species (Ompok bimaculatus) on the IUCN's red list, 11 exotic species, 78 commercial species and 13 species having potential as aquarium fish. In addition, the study also found the first presence of a species of phallostethid, Phenacostethus smithi in DNBR.
  • Manufacturing performance system for SMEs: A prioritization of KPIs with fuzzy analytic hierarchy process
    Electronic version: 30 Jun 2020 | DOI: 10.52997/jad.1.03.2020
    Abstract | PDF (649.9K)

    Abstract

    In today’s increasing competitive global market, large and successful manufacturing enterprises have implemented the system of key performance indicators (KPIs) which drives the performance toward the business objectives; however, this is not the case for small-medium sized enterprises (SMEs) which have been increasingly important for any national economy, especially in manufacturing sector. Although the KPIs can ideally be constructed in accordance with the concept of SMART (Specific, Measureable, Attainable, Realistic, Time-related) or balanced scorecard, but SMEs that are lack of limited resources and expertise could rarely afford to build such systems with the appropriate definition and measurement of KPIs. Therefore, the paper aimed to provide systematically the system of KPIs adaptable to SMEs, to prioritize the importance of each proposed KPI with the application of a fuzzy analytic hierarchy process (FAHP), and to instruct the comprehensive deployment of the SMEs’ manufacturing performance system.
  • Investigation of fermentation conditions for Candida bombicola ACTT22214 from molasses and soybean oil for sophorolipid production
    Electronic version: 31 Dec 2018 | DOI: 10.52997/jad.7.06.2018
    Abstract | PDF (260.1K)

    Abstract

    Sophorolipid (SL) is a biosurfactant belonging to the glycolipids group and was produced by harmless Candida bombicola ACTT22214 and has been widely used in many fields in our life. In order to search for appropriate condition for C. bombicola fermentation producing SL with high efficiency, this study focused on the investigation of the soy oil concentration, molasses concentration, fermentation time, pH and temperature. SL products were tested for antimicrobial activity, antioxidant, emulsifier, foaming ability. The highest content of SL was 43.27 ± 0.30 g/L under conditions of: soybean oil content 5%, molasses content 150 g/L, fermentation time 7 days, pH = 5, 28oC fermentation temperature. The antibacterial activity of SL was good: the highest resistance to Candida albicans (16.33 ± 1.15 mm), good resistance to Bacillus spizizenii (13.67 ± 0.58 mm), resistance to Staphylococcus aureus (12.67 ± 1.15 mm), relatively weak resistance to Pseudomonas aeruginosa (11.33 ± 0.58 mm) and Escherichia coli (9.67 ± 0.58 mm). The antioxidant capacity of SL was quite high with an IC50 value of 6.024 mg/mL. The emulsifying capacity of SL was equivalent to the emulsification of the tween 20 at a concentration of 5 – 10 mg/mL. SL had the ability to foam evenly from concentrations of 5 to 20 mg/mL but not higher than the corresponding concentrations of tween 20, SL was smooth, even, stable longer than tween 20.