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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

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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

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

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

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Aerogel materials from sugarcane bagasse: the effect of additives

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Electronic version: 28 Jun 2018 | DOI: 10.52997/jad.7.03.2018Abstract |
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Abstract
The main objective of this study was to examine the efficacy and capacity of using hydroponic systems in municipal pollutant removal at household scale. Three pilot scaled hydroponic systems [dimensionfor each system: 4.5 m (L) x Φ 114 mm] were installed to investigate the optimal age of vegetable, planting density and retention time for household wastewater treatment, respectively. Water spinach (Ipomoeaaquatica) planted in 27 plastic cups throughout 4.5-m-length and 114- mm-diameter uPVC pipes filled with wastewater was employed as the treating agent of pollutants. The averaged influent contained proximately 32.5 mg/L suspended solids (SS), 76.0 mg/L biological oxygen demand (BOD5), 220.5 mg/L chemical oxygen demand (COD), 26mg/L NH4+, 5.0 mg/L NO3−, and 8.5 mg/L PO43− at pH 7.3. Results showed that a designed system consisting of 10 plants of 15-day-old water spinach pre-planted in baked clay in each cup was capable oftreating 30 L of domestic wastewater meeting the current municipal wastewater discharge standards in Vietnam (column A standards of QCVN 14:2008/BTNMT) after 4 days of wastewater retention time. Ifoperated under conditions of the above parameters, the pilot-plant hydroponic system can achieve the removal of 65% SS, 82% BOD5, 74% COD, 90% NH4+, 30% NO3− and 86% PO43−. The result of this studyhas provided an applicable domestic wastewater treatment system ecofriendly and suitable for small and medium household areas. -
Electronic version: 30 Jun 2020 | DOI: 10.52997/jad.2.03.2020Abstract |
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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. -
Electronic version: 28 Jun 2018 | DOI: 10.52997/jad.1.03.2018Abstract |
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Vietnamese pangasius prices have become more volatile over the past decade exposing the business to risk and uncertainty. This study explored Vietnamese pangasius farmers’ perceptions about the sources of price risk and the effectiveness of price risk management strategies through Likert scales. The relationships between farm and farmer socioeconomic characteristics and their perceptions were also examined by using Chi-square analysis. Data were obtained through a structured survey with 110 farmers in three provinces of An Giang, Can Tho, and Dong Thap. Results suggested that pangasius farmers mostly concerned the instability of input prices, the volume of input supply, the instability of output prices, and the legislation of sales contracts between farmers and processors. We further found that price risk management strategies were not perceived as less effective measures to mitigate the price risk. Gender, farmers’ experience, farm size, crop period, farm types, and access to credit are positively related to the farmers’ perceptions. Findings on the price risk perceptions and management strategies are useful to support public and private of price risk management decision towards increasing the sustainability of pangasius production. -
Electronic version: 28 Jun 2018 | DOI: 10.52997/jad.4.03.2018Abstract |
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Abstract
The experiment was conducted to determine the effects of four amino acids (lysine, methionine, threonine and tryptophan) supplementation on growth performances and serum antibody titers to Gumboro disease (IBD, infectious bursal disease) in broiler chickens. Chicks were randomly assigned to 5 dietary groups (5 chicks/group as 12 replicates of 5 chicks) in a complete randomised experimental design. Group I served as control group, was fed a diet without any supplementation. Groups II and III were supplemented 10% of four amino acids (lysine, methionine, threonine and tryptophan) of the recommended requirements for 45 and 42 days, respectively. Meanwhile, Groups IV and V were supplemented 20% of four amino acids (lysine, methionine, threonine and tryptophan) of the recommended requirements for 45 and 42 days, respectively. The supplementation was started at 3 days of age in chicks. The chickens were vaccinated against Gumboro disease at day 12 and day 19. The antibody titer of the chickens in each group was assayed using IBD anti-body ELISA. Besides, the live body weight, average feed intake and feed conversion (FCR) were determined at 0, 21, 42 and 84 days of age. The results showed no significant different between groups in performance parameters such as body weight and FCR. However, the present work showed highest dose of lysine, methionine, threonine and tryptophan supplementation for 42 days may be improved feed intake and immune response of chicken against Gumboro disease vaccination. -
Electronic version: 31 Dec 2018 | DOI: 10.52997/jad.4.06.2018Abstract |
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Abstract
Clostridium perfringens is currently classified into five types (A, B, C, D, E) based on the different toxins produced. TypeA and C are known as the causative agent of enteritis and enterotoxemia in newborn and young piglets with severe intestinal lesions including edema, hemorrhage and necrosis. A multiplex PCR (mPCR) was developed in order to quickly and early determine the presence of genotypes of C. perfringens based on their genes of cpa, cpb, cpb2 and cpe encoding alpha toxin, beta toxin, beta2 toxin and enterotoxin with predicted products of 324 bp, 196 bp, 107 bp and 257 bp respectively. The detection limit of the mPCR assay was 1 × 103 copies/reaction for each gene. Sequencing of mPCR products performed with clinical samples collected from C. perfringens suspected pigs showed that the mPCR test functioned specifically. In conclusion, the developed mPCR test successfully detected the presence of genes cpa, cpb, cpb2 and cpe in the examined samples. Analysis of the bacteria isolated from field samples of diarrheal piglets collected in this study indicated that C. perfringens carrying gene cpa counted for 96.66% and 3.33% was identified as C. perfringens carrying genes cpa and cpb concurrently. Gene cpe was not found in this study, while gene cpb2 was detected coincidently in 73.33% of the samples with cpa gene. The results indicate that the prevalence of these four toxin genes is cpa, cpb2, cpb and cpe in decending order.