Vol. 22 No. 3 (2024)

This study aimed to investigate the parasitism rate of Encarsia sp.on B. tabacias well as the impact of host age, host density and parasitoid density on its parasitism. The survey on natural Encarsiaparasitism was conducted on the eggplant fields at Gia Lam, Hanoi at 7 days interval. The results showed that Encarsia sp.had the highest parasitism rate (58.57%) in the middle of June and declined afterward. The parasitoid and whiteflies were mass rearing in the laboratory and recorded for the parasitism rate in 24 hours with different host age (1st-4thinstar nymphs), host densities (5-80 nymphs(3rd-4thinstar)/ leave) and parasitoid densities (1-4 females/ 50 nymphs (3rd-4thinstar). Encarsia sp. reached the highest parasitised percentage at 3rdinstar nymph and lowest at 1stinstar nymph. As the host density increased the parasitism rate decreased, but the emerge rate increased, however. Nevertheless, parasitism increased with increased parasitoid density, but the average parasitism per female decreased. At densities of 1-2 female parasitoids the emerge rate was higher than at 3-4 female parasitoids.Overall, Encarsia sp. had high parasitism rate on the field and host age, host and parasitoid density influenced its parasitism.

The Van Ban pear is a fruittreethat brings high economic efficiency to local peoplein Lao Cai province which was at risk of eroding precious genetic resources due to the traditional farming practices of mountain people. Aims to effectively exploit and sustainably develop this pear variety, 3 experiments were conducted, including (1) Study on the effects of fertilization treatmentson growth, yield and quality of Van Ban pear variety; (2) Study on pruning combined with pulling branches techniques on growth, yield and quality of Van Ban pear variety; (3) Study on the effects of some soil moisture retention measures on growth, yield and quality of Van Ban pear variety. Research results indicatedthat applying 1,200 kg/ha of Viet Nhat synthetic NPK fertilizer (15 : 15 : 15 + TE) gavea high fruiting rate (4.47%); large fruit (353.1 g/fruit), high yield (213.9 kg/tree. Pruning branches three times a year combined with pulling branches once increasedfruit setting rate, number of fruits/tree, productivity, fruit setting rate (4.73%), fruit size (349.9 g/fruit) andthe actual yield reached190.3 kg/tree.The most optimal treatment to retain moisture was plant matter’s addition to the soil, combined with applying AMS-1 moisturizing agent at an amount of 0.1kg/tree. Fertilizing and moisturizing as above had enhancd fruit quality (increased dry matter content, total sugar, brix and vitamin C content) of Van Ban pear variety.

This study was carried out to evaluate agronomic characteristics, salttolerance and the presence of QTL Saltolof newly collected rice accessions throughfield experiment,artificial salinity treatment and molecular identification. The experiments on agronomic characteristics and salt tolerance were carried out according to the method of IRRI, 1997 and 2013 at the FieldCrops Research Institute, Gia Loc district, Hai Duong province whilemolecular marker analysis was conducted at Vietnam National University of Agriculture, Gia Lam district, Ha Noi city. Theevaluation results showed that the rice accessions were diverse in growth duration, plant height, flag leaf length, and panicle length. Out of 39 accessions, 6 promising ones were selectedwith good salt tolerance: Lua soi, M3, HHZ8-SAL6-SAL3-SAL1, HHZ8-SAL6-SAL3-Y2, HHZ12-SAL8-Y1-SAL1 and Hasawi IRGC 16817and 22 rice accessions carrying SaltolQTL. Thus, the selection of materials for breeding salt-tolerant rice varieties should combine the evaluation of agronomic characteristics with artificial salt tolerance assessment and molecular markers.

Melon (Cucumis melo) is a crop of economic value and suitable for growing in greenhouses in North Vietnam. In the present study, we examined the influenceof storage conditions on thepollen germinability of introduced melon cultivars. The research aimed to determine the optimal conditions to preserve pollensfor application in the production, breeding, and selection of melons. Pollen grains of 4 melon cultivars, i.e.Bach Ngoc, Kim Hoang Hau, Gia Huy, and Makuwa were collected and preserved under different temperatures (25C, 8C, and -20C), relative humidities (20%, 40%, 60%), and organic solvents (acetone, n-hexane, cyclohexane, diethyl ether, and absolute alcohol). Pollen germination rates were tested in vitroin 1% agar medium containing 15% sucrose and 5 ppm boric acidfor3 to 30 days depending on experiments. Results showed that when dried and kept under -20C and 20% relative humidity, melon pollen grains sustainedtheir germinabilityat approx 50% at 30 daysafter storage.

This study aimed to investigate the parasitism rate of Encarsia sp.on B. tabacias well as the impact of host age, host density and parasitoid density on its parasitism. The survey on natural Encarsiaparasitism was conducted on the eggplant fields at Gia Lam, Hanoi at 7 days interval. The results showed that Encarsia sp.had the highest parasitism rate (58.57%) in the middle of June and declined afterward. The parasitoid and whiteflies were mass rearing in the laboratory and recorded for the parasitism rate in 24 hours with different host age (1st-4thinstar nymphs), host densities (5-80 nymphs(3rd-4thinstar)/ leave) and parasitoid densities (1-4 females/ 50 nymphs (3rd-4thinstar). Encarsia sp. reached the highest parasitised percentage at 3rdinstar nymph and lowest at 1stinstar nymph. As the host density increased the parasitism rate decreased, but the emerge rate increased, however. Nevertheless, parasitism increased with increased parasitoid density, but the average parasitism per female decreased. At densities of 1-2 female parasitoids the emerge rate was higher than at 3-4 female parasitoids.Overall, Encarsia sp. had high parasitism rate on the field and host age, host and parasitoid density influenced its parasitism.

The Van Ban pear is a fruittreethat brings high economic efficiency to local peoplein Lao Cai province which was at risk of eroding precious genetic resources due to the traditional farming practices of mountain people. Aims to effectively exploit and sustainably develop this pear variety, 3 experiments were conducted, including (1) Study on the effects of fertilization treatmentson growth, yield and quality of Van Ban pear variety; (2) Study on pruning combined with pulling branches techniques on growth, yield and quality of Van Ban pear variety; (3) Study on the effects of some soil moisture retention measures on growth, yield and quality of Van Ban pear variety. Research results indicatedthat applying 1,200 kg/ha of Viet Nhat synthetic NPK fertilizer (15 : 15 : 15 + TE) gavea high fruiting rate (4.47%); large fruit (353.1 g/fruit), high yield (213.9 kg/tree. Pruning branches three times a year combined with pulling branches once increasedfruit setting rate, number of fruits/tree, productivity, fruit setting rate (4.73%), fruit size (349.9 g/fruit) andthe actual yield reached190.3 kg/tree.The most optimal treatment to retain moisture was plant matter’s addition to the soil, combined with applying AMS-1 moisturizing agent at an amount of 0.1kg/tree. Fertilizing and moisturizing as above had enhancd fruit quality (increased dry matter content, total sugar, brix and vitamin C content) of Van Ban pear variety.

This study was carried out to evaluate agronomic characteristics, salttolerance and the presence of QTL Saltolof newly collected rice accessions throughfield experiment,artificial salinity treatment and molecular identification. The experiments on agronomic characteristics and salt tolerance were carried out according to the method of IRRI, 1997 and 2013 at the FieldCrops Research Institute, Gia Loc district, Hai Duong province whilemolecular marker analysis was conducted at Vietnam National University of Agriculture, Gia Lam district, Ha Noi city. Theevaluation results showed that the rice accessions were diverse in growth duration, plant height, flag leaf length, and panicle length. Out of 39 accessions, 6 promising ones were selectedwith good salt tolerance: Lua soi, M3, HHZ8-SAL6-SAL3-SAL1, HHZ8-SAL6-SAL3-Y2, HHZ12-SAL8-Y1-SAL1 and Hasawi IRGC 16817and 22 rice accessions carrying SaltolQTL. Thus, the selection of materials for breeding salt-tolerant rice varieties should combine the evaluation of agronomic characteristics with artificial salt tolerance assessment and molecular markers.

Melon (Cucumis melo) is a crop of economic value and suitable for growing in greenhouses in North Vietnam. In the present study, we examined the influenceof storage conditions on thepollen germinability of introduced melon cultivars. The research aimed to determine the optimal conditions to preserve pollensfor application in the production, breeding, and selection of melons. Pollen grains of 4 melon cultivars, i.e.Bach Ngoc, Kim Hoang Hau, Gia Huy, and Makuwa were collected and preserved under different temperatures (25C, 8C, and -20C), relative humidities (20%, 40%, 60%), and organic solvents (acetone, n-hexane, cyclohexane, diethyl ether, and absolute alcohol). Pollen germination rates were tested in vitroin 1% agar medium containing 15% sucrose and 5 ppm boric acidfor3 to 30 days depending on experiments. Results showed that when dried and kept under -20C and 20% relative humidity, melon pollen grains sustainedtheir germinabilityat approx 50% at 30 daysafter storage.

African swine fever (ASF) is caused by the ASF virus (ASFV) of the family Asfarviridae with a mortality rate of up to 100%. Currently, studies on the LAMP method (Loop-mediated isothermal amplification) for ASF diagnosis are based onwet LAMP, which is not feasible for field application due to the requirement of cold conditions. This study aimedto evaluate the effectiveness of dry LAMP methods to support early field diagnosis of ASF. The gold standard real-time PCR method was used to evaluate the sensitivity and specificity of the direct dry LAMP method. The results show that the two-step dry LAMP method wasmore effective in DNA amplification than the one-step dry LAMP method. Both dry LAMP methods showed good DNA amplification efficiency in both storage conditions after 2 months.The sensitivity and specificity of the two-step dry LAMP method after 2.5 months at 4C were 88.1% and 100%. Thus, the dry LAMP method is promising as an early diagnosis tool for ASF, helping to support the screening of infected individuals at the field and to improve the effectiveness of prevention and control of ASF.

This study aimed to evaluate the effects of dietary supplementationwith herbalplants mixture on growth performance, gas emmission of NH3 and H2Sand Clostridium perfringens(C. perfingens) bacterium inmanure ofgrowingpigs from 30-60kg. Experimental pigs were divided into three groups, a control group without herbal plants mixture and two groups with two different levels of herbal plants mixture supplementation, 15 grams or 20 grams for one kg of feed. The supplementation with 15 grams and 20 grams herbalplants mixture improved the average daily gain by 11.67% and 13.45%, respectively, compared with the control.After 28 days of using feed with supplementation herbalplants mixture, the concentration of NH3emissions from pig manure in experimental group 1 (TD1)and experimental group 2 (TD2)has decreased by 51.58% and 49.47%, respectively, and the concentration of H2S in TD1 group and TD2 group has decreased by 13.92% and 51.03%, respectively, compared to the control group. The concentration of C. perfringensin the TD1groupand TD2groupdecreased by 23.17% and 27.35%, respectively, compared with the control group. The supplementationherbalplants mixture at 20 grams per kilogram of feed had better effect on reducing H2S emissions and the concentration of C.perfringensin pig manure than adding 15 grams of herbalplants mixture per kilogram of feed.

This study was carried out to build a database of microalgae in fish ponds at the Fisheries Faculty of the Vietnam National University of Agriculture. Water samples were collected to examine the frequency of occurrence and microalgal composition in five aquaculture ponds. A total of 30 microalgal samples (15 from winter and 15 from summer) were analyzed in this study. The results showed that there were 136 microalgae species from 8 classes, 11 orders, 26 families, 49 genera, and 6 phyla (Euglenophyta, Chlorophyta, Cyanobacteriophyta, Bacillariophyta, Pyrophyta, and Xanthophyta). The number of microalgal species was abundant in summer. There were 27 microalgae species that could be used as live food for zooplankton. The occurrence of 12 microalgae species is a bioindicator of organic compound enrichment in water. There were three microalgae species that could cause harmful algal “blooms”.

This study aimed to determine the optimal fertilization method in the process of artificial reproduction of Spotted scat. A total of 18 pairs of parent fish were selected to participate in spawning trails based on the levels of gonad maturation. Females were injected twice at 24h interval by the hormone LHRH-a (20 and 50 µg/kg), while male fish were induced once by the hormone HCG (200 IU/kg) at the same time as the second injection of the female. After hormone injection, fish were randomly selected and assigned into 3 groups including Group 1: 6 pairs used to investigate natural fertilization in composite tanks; Group 2: 6 pairs used to investigate natural fertilization in a 6m3fabric cage located at the broodstock breeding area and group 3: 6 pairs fertilized by stripping method. The results showed that the natural spawning rates of groups 1 and group 2 were 66.7% and 83.3%, respectively. However, the rate of fertilized eggs in these groups was 0%. For fish in group 3, the spawning rate of fish was 83.3%, and the rate of fertilized eggs was quite high as 86.2%. This indicates that the “dry method” by stripping eggs and sperms from brooders is the optimal method for the artificial reproduction of Spotted scat up to the present time.

African swine fever (ASF) is caused by the ASF virus (ASFV) of the family Asfarviridae with a mortality rate of up to 100%. Currently, studies on the LAMP method (Loop-mediated isothermal amplification) for ASF diagnosis are based onwet LAMP, which is not feasible for field application due to the requirement of cold conditions. This study aimedto evaluate the effectiveness of dry LAMP methods to support early field diagnosis of ASF. The gold standard real-time PCR method was used to evaluate the sensitivity and specificity of the direct dry LAMP method. The results show that the two-step dry LAMP method wasmore effective in DNA amplification than the one-step dry LAMP method. Both dry LAMP methods showed good DNA amplification efficiency in both storage conditions after 2 months.The sensitivity and specificity of the two-step dry LAMP method after 2.5 months at 4C were 88.1% and 100%. Thus, the dry LAMP method is promising as an early diagnosis tool for ASF, helping to support the screening of infected individuals at the field and to improve the effectiveness of prevention and control of ASF.

This study aimed to evaluate the effects of dietary supplementationwith herbalplants mixture on growth performance, gas emmission of NH3 and H2Sand Clostridium perfringens(C. perfingens) bacterium inmanure ofgrowingpigs from 30-60kg. Experimental pigs were divided into three groups, a control group without herbal plants mixture and two groups with two different levels of herbal plants mixture supplementation, 15 grams or 20 grams for one kg of feed. The supplementation with 15 grams and 20 grams herbalplants mixture improved the average daily gain by 11.67% and 13.45%, respectively, compared with the control.After 28 days of using feed with supplementation herbalplants mixture, the concentration of NH3emissions from pig manure in experimental group 1 (TD1)and experimental group 2 (TD2)has decreased by 51.58% and 49.47%, respectively, and the concentration of H2S in TD1 group and TD2 group has decreased by 13.92% and 51.03%, respectively, compared to the control group. The concentration of C. perfringensin the TD1groupand TD2groupdecreased by 23.17% and 27.35%, respectively, compared with the control group. The supplementationherbalplants mixture at 20 grams per kilogram of feed had better effect on reducing H2S emissions and the concentration of C.perfringensin pig manure than adding 15 grams of herbalplants mixture per kilogram of feed.

This study was carried out to build a database of microalgae in fish ponds at the Fisheries Faculty of the Vietnam National University of Agriculture. Water samples were collected to examine the frequency of occurrence and microalgal composition in five aquaculture ponds. A total of 30 microalgal samples (15 from winter and 15 from summer) were analyzed in this study. The results showed that there were 136 microalgae species from 8 classes, 11 orders, 26 families, 49 genera, and 6 phyla (Euglenophyta, Chlorophyta, Cyanobacteriophyta, Bacillariophyta, Pyrophyta, and Xanthophyta). The number of microalgal species was abundant in summer. There were 27 microalgae species that could be used as live food for zooplankton. The occurrence of 12 microalgae species is a bioindicator of organic compound enrichment in water. There were three microalgae species that could cause harmful algal “blooms”.

This study aimed to determine the optimal fertilization method in the process of artificial reproduction of Spotted scat. A total of 18 pairs of parent fish were selected to participate in spawning trails based on the levels of gonad maturation. Females were injected twice at 24h interval by the hormone LHRH-a (20 and 50 µg/kg), while male fish were induced once by the hormone HCG (200 IU/kg) at the same time as the second injection of the female. After hormone injection, fish were randomly selected and assigned into 3 groups including Group 1: 6 pairs used to investigate natural fertilization in composite tanks; Group 2: 6 pairs used to investigate natural fertilization in a 6m3fabric cage located at the broodstock breeding area and group 3: 6 pairs fertilized by stripping method. The results showed that the natural spawning rates of groups 1 and group 2 were 66.7% and 83.3%, respectively. However, the rate of fertilized eggs in these groups was 0%. For fish in group 3, the spawning rate of fish was 83.3%, and the rate of fertilized eggs was quite high as 86.2%. This indicates that the “dry method” by stripping eggs and sperms from brooders is the optimal method for the artificial reproduction of Spotted scat up to the present time.

The purpose of this study was to determinethe effect offly ash ontheorganic substratesfor growing flower and ornamental plants in order to effectivelyreuse theagricultural and industrialwaste sources. The fly ash was added into rawmaterials toproduce organic substrate at different rates: 5%, 10%, 15% and 20% and incubated by the semi-aerobic method. The results indicated that the organic substrate from agricultural by-products supplemented with fly ash had goodnutritional content, limited presence of E. coliand Salmonella, withneutral pH, and acceptable heavy metal content(notexceeding QCVN 03-MT:2015/BTNMT standard) that ensures the growth and development of flowersand ornamentalplants. The experiment of growing Gerbera jamesoniion organic substrates supplemented with fly ash showed a cleareffect on growth rate, harvested yield, and the number of flowers harvested in the treatment supplemented with 15% fly ash with 1.75 flowers higher than the control without fly ash supplement 40%. Thefly ash rate of 10-15% appeared as appropriate range to add to the compost pile of organic substrates, of which 15% was most efficient for the growth of Gerbera jamesoniiand reduction of expenses during the crop care.

The purpose of this study was to determinethe effect offly ash ontheorganic substratesfor growing flower and ornamental plants in order to effectivelyreuse theagricultural and industrialwaste sources. The fly ash was added into rawmaterials toproduce organic substrate at different rates: 5%, 10%, 15% and 20% and incubated by the semi-aerobic method. The results indicated that the organic substrate from agricultural by-products supplemented with fly ash had goodnutritional content, limited presence of E. coliand Salmonella, withneutral pH, and acceptable heavy metal content(notexceeding QCVN 03-MT:2015/BTNMT standard) that ensures the growth and development of flowersand ornamentalplants. The experiment of growing Gerbera jamesoniion organic substrates supplemented with fly ash showed a cleareffect on growth rate, harvested yield, and the number of flowers harvested in the treatment supplemented with 15% fly ash with 1.75 flowers higher than the control without fly ash supplement 40%. Thefly ash rate of 10-15% appeared as appropriate range to add to the compost pile of organic substrates, of which 15% was most efficient for the growth of Gerbera jamesoniiand reduction of expenses during the crop care.

Rhizobacterium Bacillus subtilisRB.CJ41 isolated from black pepper hasantifungal activity against Fusariumsp. under in vitroand ex vitroconditions. The objective of the study was to select the appropriate culture conditions of the strain B. subtilisRB.CJ41. The single effect of environmental factors including C/N source, carbon sources, (NH4)2SO4and MgSO4sourceswas investigated on the density and Fusariumsp antifungal activity of the strain RB.CJ41. The results showed that bean residue, mannitol and MgSO4had the greatest impact on density and antifungal activity of strain RB.CJ41. Using Response Surface Methodology (RSM) - Central Composite Design (CCD), a quadratic equation describing the dependence of Fusariumsp. antifungal activity with three survey variableswas determined in the form “Antifungal activity (%) = 11.66 – 0.9452A + 1.00B + 0.2713C – 0.5625AB – 0.5625AC – 0.0625BC – 2.28A2 – 2.73B2– 1.84C2.Analytical results showed theoptimal range forhigh antifungal activity of rhizobacteriumB. subtilisRB.CJ41 was7 g/lto 8 g/lfor bean residue, 6g/lto 7g/lfor mannitol and 4 g/lto 5 g/lfor MgSO4.

Rhizobacterium Bacillus subtilisRB.CJ41 isolated from black pepper hasantifungal activity against Fusariumsp. under in vitroand ex vitroconditions. The objective of the study was to select the appropriate culture conditions of the strain B. subtilisRB.CJ41. The single effect of environmental factors including C/N source, carbon sources, (NH4)2SO4and MgSO4sourceswas investigated on the density and Fusariumsp antifungal activity of the strain RB.CJ41. The results showed that bean residue, mannitol and MgSO4had the greatest impact on density and antifungal activity of strain RB.CJ41. Using Response Surface Methodology (RSM) - Central Composite Design (CCD), a quadratic equation describing the dependence of Fusariumsp. antifungal activity with three survey variableswas determined in the form “Antifungal activity (%) = 11.66 – 0.9452A + 1.00B + 0.2713C – 0.5625AB – 0.5625AC – 0.0625BC – 2.28A2 – 2.73B2– 1.84C2.Analytical results showed theoptimal range forhigh antifungal activity of rhizobacteriumB. subtilisRB.CJ41 was7 g/lto 8 g/lfor bean residue, 6g/lto 7g/lfor mannitol and 4 g/lto 5 g/lfor MgSO4.

Để thích ứng với sự thay đổi của môi trường kinh tế - xã hội, đặc biệt là đại dịch COVID-19, đòi hỏi các ngân hàng tại Việt Nam phải đổi mới và phát triển các loại hình dịch vụ trong đó có tài trợ thương mại. Với số liệu khảo sát từ 165 nhân viên làm việc tại Ngân hàng thương mại cổ phần Công thương Việt Nam (VietinBank) trong năm 2023. Bài viết với mục đích tìm ra được các yếu tố chính tác động tới hoạt động tài trợ thương mại, để từ đó có các biện pháp hợp lý tăng cường phát triển hoạt động tài trợ thương mại, hoạt độngtạo ra “thu nhập từ phí”, chiếm phần lớn trong thu nhập ngoài lãi của ngân hàng. Bằng phương pháp phân tích yêu tố khám phá (EFA), nghiên cứu này đã chỉ ra việc đa dạng hóa dịch vụ trong đó phải kể đến là sản phẩm UPAS LC đã có tác động tích cực nhất tới việc đẩy mạnh hoạt động tài trợ thương mại. Ngoài ra, các yếu tố như năng lực tài chính và ứng dụng chuyển đổi số cũng tác động tích cực, nhưng rủi ro lại là nhân tố tác động tiêu cực đến hoạt động tài trợ thương mại tại VietinBank. Từ đó, bài viết đề xuất một số kiến nghị nhằm thúc đẩy hoạt động tài trợ thương mại tại VietinBank trong thời gian tới.

This study aimed to estimate the economic efficiency of rice and sesame in the crop rotation model of 2 rice crops and 1 sesame crop adopted by farmers in the Mekong River Delta. Cobb - Douglas random marginal profit function analysis of primary data collected from 191 farming households practising this crop rotation model in 2022 showed that the average economic efficiency of farming households estimated in this study was 73.28% in the sesame crop, 66.06% in the winter-spring rice crop, and 60.69% in the fall-winter rice crop. The level of economic efficiency of farming households was also likely to increase if the technical efficiency and allocation efficiency of farming households were optimally improved.

The purpose of the present studywasto enlighten continuing information sharing behavior via social media among users in Vietnam. The studyapplied the motivation theory to develop a research model of continuing information sharing intention via social media. Data were collected from 494 respondents who have used social media platforms and shared information via those platforms. Structural equation modeling was utilized to assess the proposed model. Results indicate that intrinsic motivation played an essential role in fostering continuance intention to share information via social media. In addition, exhibition, targeting, informative attractiveness, emotion, and source credibility exterted significantly positive influences on intrinsic motivation toward information sharing via social media. Lastly, academic and managerial implications were discussed to contribute to the current literature on social media-based consumer behavior and promote information sharing on the Internet.

Để thích ứng với sự thay đổi của môi trường kinh tế - xã hội, đặc biệt là đại dịch COVID-19, đòi hỏi các ngân hàng tại Việt Nam phải đổi mới và phát triển các loại hình dịch vụ trong đó có tài trợ thương mại. Với số liệu khảo sát từ 165 nhân viên làm việc tại Ngân hàng thương mại cổ phần Công thương Việt Nam (VietinBank) trong năm 2023. Bài viết với mục đích tìm ra được các yếu tố chính tác động tới hoạt động tài trợ thương mại, để từ đó có các biện pháp hợp lý tăng cường phát triển hoạt động tài trợ thương mại, hoạt độngtạo ra “thu nhập từ phí”, chiếm phần lớn trong thu nhập ngoài lãi của ngân hàng. Bằng phương pháp phân tích yêu tố khám phá (EFA), nghiên cứu này đã chỉ ra việc đa dạng hóa dịch vụ trong đó phải kể đến là sản phẩm UPAS LC đã có tác động tích cực nhất tới việc đẩy mạnh hoạt động tài trợ thương mại. Ngoài ra, các yếu tố như năng lực tài chính và ứng dụng chuyển đổi số cũng tác động tích cực, nhưng rủi ro lại là nhân tố tác động tiêu cực đến hoạt động tài trợ thương mại tại VietinBank. Từ đó, bài viết đề xuất một số kiến nghị nhằm thúc đẩy hoạt động tài trợ thương mại tại VietinBank trong thời gian tới.

This study aimed to estimate the economic efficiency of rice and sesame in the crop rotation model of 2 rice crops and 1 sesame crop adopted by farmers in the Mekong River Delta. Cobb - Douglas random marginal profit function analysis of primary data collected from 191 farming households practising this crop rotation model in 2022 showed that the average economic efficiency of farming households estimated in this study was 73.28% in the sesame crop, 66.06% in the winter-spring rice crop, and 60.69% in the fall-winter rice crop. The level of economic efficiency of farming households was also likely to increase if the technical efficiency and allocation efficiency of farming households were optimally improved.

The purpose of the present studywasto enlighten continuing information sharing behavior via social media among users in Vietnam. The studyapplied the motivation theory to develop a research model of continuing information sharing intention via social media. Data were collected from 494 respondents who have used social media platforms and shared information via those platforms. Structural equation modeling was utilized to assess the proposed model. Results indicate that intrinsic motivation played an essential role in fostering continuance intention to share information via social media. In addition, exhibition, targeting, informative attractiveness, emotion, and source credibility exterted significantly positive influences on intrinsic motivation toward information sharing via social media. Lastly, academic and managerial implications were discussed to contribute to the current literature on social media-based consumer behavior and promote information sharing on the Internet.

Based on the systematicreviewof the theorical and the practical review, this research contributes to the explanation and development the theoretical issues on organic agri-food consumption research in the context of practical issues in Vietnam. Research on organic agricultural food consumption behavior should systematically ensure the following contents: Consumer attitude; consumption intention; buying behavior and post-purchase behavior of organic agricultural food. Environmental protection attitudes, health concerns and acceptance of quality promote organic agricultural food consumption. Price and confidence can stifle organic agrifood consumption. In the context that the organic agri-food market in Vietnam still has many limitations in terms of price, product diversity and distribution channels, it is necessary to study policies in management to promote organic agrifood business and consumption.

Based on the systematicreviewof the theorical and the practical review, this research contributes to the explanation and development the theoretical issues on organic agri-food consumption research in the context of practical issues in Vietnam. Research on organic agricultural food consumption behavior should systematically ensure the following contents: Consumer attitude; consumption intention; buying behavior and post-purchase behavior of organic agricultural food. Environmental protection attitudes, health concerns and acceptance of quality promote organic agricultural food consumption. Price and confidence can stifle organic agrifood consumption. In the context that the organic agri-food market in Vietnam still has many limitations in terms of price, product diversity and distribution channels, it is necessary to study policies in management to promote organic agrifood business and consumption.