Pub Date : 2022-06-29DOI: 10.35382/tvujs.1.47.2022.920
Thai Hoa Dang
This study aimed to analyze the financial efficiency, determine influencing factors and propose solutions to developing organic rice farming models. The results showed that while it requires farmers to have more production experience and education, organic rice farming has advantages in producing more per land area with lower production costs and more stable product output. The lack of labor and tools for mechanization were the main difficulties of using this model. The average profit per crop of the organic rice model was1,768,000 VND/1,000 m2/crop, approximately 530,300 VND/1,000 m2/crop higher than the traditional rice model. Regression analysis results showed that the financial performance of the two models was affected by the educational level of farmers and types of costs such as fertilizers, pesticides and labor. Production experience of farmers also influences the efficiency of the organic rice production model, while factors relatedto seed and selling price affect the efficiency of the traditional rice production model.
{"title":"COMPARING THE FINANCIAL EFFICIENCY OF TRADITIONAL VERSUS ORGANIC RICE FARMING IN TIEU CAN DISTRICT, TRA VINH PROVINCE, VIETNAM","authors":"Thai Hoa Dang","doi":"10.35382/tvujs.1.47.2022.920","DOIUrl":"https://doi.org/10.35382/tvujs.1.47.2022.920","url":null,"abstract":"This study aimed to analyze the financial efficiency, determine influencing factors and propose solutions to developing organic rice farming models. The results showed that while it requires farmers to have more production experience and education, organic rice farming has advantages in producing more per land area with lower production costs and more stable product output. The lack of labor and tools for mechanization were the main difficulties of using this model. The average profit per crop of the organic rice model was1,768,000 VND/1,000 m2/crop, approximately 530,300 VND/1,000 m2/crop higher than the traditional rice model. Regression analysis results showed that the financial performance of the two models was affected by the educational level of farmers and types of costs such as fertilizers, pesticides and labor. Production experience of farmers also influences the efficiency of the organic rice production model, while factors relatedto seed and selling price affect the efficiency of the traditional rice production model.","PeriodicalId":159074,"journal":{"name":"TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099","volume":"96 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128801194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-28DOI: 10.35382/tvujs.1.46.2022.862
Hung T. Nguyen, Truong Phu Nguyen, Tan Nhat Phan, P. T. Tran, Phu Ba Nguyen
Pervious concrete pavement has been used widely as an effective practice for water management in low-impact development techniques. The hydrologic performance of pervious concrete pavement depends significantlyon the rainfall intensity and the designed slope. This study assessed the hydrologic performance of pervious concrete pavement by evaluating the time for surface ponding via finite element analysis. A series of simulations were carried out to explore the relationship between hydrologic performance and pervious concrete pavement by the Hydrus 2D program. The research’s results showed that as the slope increased, the time of surface ponding also increased. The data indicated that the slope variable had a low impact on the water level in pervious concrete pavement under a constant rainfall intensity. Observation of the effect of rainfall intensity showed that when the rainfall intensity increased twofold, the time for surface ponding dropped about two times. Furthermore, when surface ponding appeared, pervious concrete pavement at higher rainfall intensity had lower water content. The rainfall intensity also significantly affects the hydrologicperformance of the pervious concrete pavement. This study only assessed the hydrologic performance by using the time for surface ponding via finite element analysis. Further experimental studies should be conducted to examine the relationship of other factors to the hydrologic performance of pervious concrete pavement.
{"title":"INVESTIGATION ON HYDROLOGIC PERFORMANCE OF PERVIOUS CONCRETE PAVEMENT BY FINITE ELEMENT ANALYSIS","authors":"Hung T. Nguyen, Truong Phu Nguyen, Tan Nhat Phan, P. T. Tran, Phu Ba Nguyen","doi":"10.35382/tvujs.1.46.2022.862","DOIUrl":"https://doi.org/10.35382/tvujs.1.46.2022.862","url":null,"abstract":"Pervious concrete pavement has been used widely as an effective practice for water management in low-impact development techniques. The hydrologic performance of pervious concrete pavement depends significantlyon the rainfall intensity and the designed slope. This study assessed the hydrologic performance of pervious concrete pavement by evaluating the time for surface ponding via finite element analysis. A series of simulations were carried out to explore the relationship between hydrologic performance and pervious concrete pavement by the Hydrus 2D program. The research’s results showed that as the slope increased, the time of surface ponding also increased. The data indicated that the slope variable had a low impact on the water level in pervious concrete pavement under a constant rainfall intensity. Observation of the effect of rainfall intensity showed that when the rainfall intensity increased twofold, the time for surface ponding dropped about two times. Furthermore, when surface ponding appeared, pervious concrete pavement at higher rainfall intensity had lower water content. The rainfall intensity also significantly affects the hydrologicperformance of the pervious concrete pavement. This study only assessed the hydrologic performance by using the time for surface ponding via finite element analysis. Further experimental studies should be conducted to examine the relationship of other factors to the hydrologic performance of pervious concrete pavement.","PeriodicalId":159074,"journal":{"name":"TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133665785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-28DOI: 10.35382/tvujs.1.46.2022.916
D. Son
Cultural symbols are research objects that many scholars are interested in when studying cultures. The article is based on the structural theory of symbolic anthropology (or interpretive anthropology) to study and decipher the meaning of sand mountains in Khmer culture. The building of sand mountains duringceremonies on New Year’s Day is an important cultural and spiritual activity that illustrates religious harmony with cultural life during traditional festivals. In the article, the symbolic meaning of the sand mountain is deciphered to explore the cultural values and religious philosophies hidden in the heart of Khmer culture in Southern Viet Nam.
{"title":"THE BUILDING OF SAND MOUNTAIN CEREMONY: SYMBOL OF RELIGIOUS CULTURE AT THE KHMER NEW YEAR IN SOUTHERN VIETNAM","authors":"D. Son","doi":"10.35382/tvujs.1.46.2022.916","DOIUrl":"https://doi.org/10.35382/tvujs.1.46.2022.916","url":null,"abstract":"Cultural symbols are research objects that many scholars are interested in when studying cultures. The article is based on the structural theory of symbolic anthropology (or interpretive anthropology) to study and decipher the meaning of sand mountains in Khmer culture. The building of sand mountains duringceremonies on New Year’s Day is an important cultural and spiritual activity that illustrates religious harmony with cultural life during traditional festivals. In the article, the symbolic meaning of the sand mountain is deciphered to explore the cultural values and religious philosophies hidden in the heart of Khmer culture in Southern Viet Nam.","PeriodicalId":159074,"journal":{"name":"TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116414411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-28DOI: 10.35382/tvujs.1.46.2022.863
Hao Phuoc Bui
In the design of steel column base, parameters of limited compressive strength NRd and limited bending moment MRd are the control conditions that need to be paid due attention, otherwise it will damage the concrete foundation block at the foot of the column. The objective of the article is to use the effective area method in Eurocode 3 standard to determine NRd and MRd of the steel column base, then perform numericalcalculations to check the calculation results. The results show that the NRd and MRd of the steel column base tends to increase when increasing the thickness of the base plate and the grade of the concrete foundation block. Then, corresponding to each thickness of the base plate (from t=18 mm to t=36 mm) and each concrete grade (from C16/20 to C50/60) will give corresponding results for each NRd and MRd. However, it is important to note that the compressive capacity and bending moment of the column base will be limited, can not increase forever, for example, can not overcome the compressive strength Npl;Rd = 1596 kN and the limit bending strength Mpl;Rd=131.3 kN.m of the concrete foundation block at the base of the column. The article recommends using the results of this study to choose the thickness of the base plate and the grade of theconcrete foundation block in the most effective, accurate and economical way.
{"title":"REASERCH ON DETERMINATION FOR THE LIMITED COMPRESSIVE STRENGTH AND BENDING MOMENT OF THE STEEL COLUMN BASE USING EFFECTIVE AREA PANDEMIC","authors":"Hao Phuoc Bui","doi":"10.35382/tvujs.1.46.2022.863","DOIUrl":"https://doi.org/10.35382/tvujs.1.46.2022.863","url":null,"abstract":"In the design of steel column base, parameters of limited compressive strength NRd and limited bending moment MRd are the control conditions that need to be paid due attention, otherwise it will damage the concrete foundation block at the foot of the column. The objective of the article is to use the effective area method in Eurocode 3 standard to determine NRd and MRd of the steel column base, then perform numericalcalculations to check the calculation results. The results show that the NRd and MRd of the steel column base tends to increase when increasing the thickness of the base plate and the grade of the concrete foundation block. Then, corresponding to each thickness of the base plate (from t=18 mm to t=36 mm) and each concrete grade (from C16/20 to C50/60) will give corresponding results for each NRd and MRd. However, it is important to note that the compressive capacity and bending moment of the column base will be limited, can not increase forever, for example, can not overcome the compressive strength Npl;Rd = 1596 kN and the limit bending strength Mpl;Rd=131.3 kN.m of the concrete foundation block at the base of the column. The article recommends using the results of this study to choose the thickness of the base plate and the grade of theconcrete foundation block in the most effective, accurate and economical way.","PeriodicalId":159074,"journal":{"name":"TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128817664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-28DOI: 10.35382/tvujs.1.46.2022.864
Tai Tan Phan, Ha Thanh Ngo, Banh Thanh Huynh
A vehicle differential is a device that divides engine power between the two driving wheels and allows the wheels to rotate at different speeds when the vehicle moves on the road. The speed difference depends mainly on the grip between the wheels and the road surface. When the traction acting on both driving wheels is equal,the differential will distribute traction equally, helping the vehicle move stably on a straight road. However, if one of the two driving wheels rolls on a slippery road, the differential will distribute more engine power to this wheel. As a result, the vehicle’s motion is unstable, engine power is lost, the vehicle cannot move. To solvethe problem, using a limited-slip differential, an active differential or a traction control system is considered an optimal solution. This study uses the brake moment acting on the skidding wheel to redistribute the engine power at the two driving wheels and uses the PID method for traction control at the drive wheels. Survey results show the effectiveness of the designed controller.
{"title":"APPLICATION OF PID METHOD TO CONTROL TRACTION ON THE VEHICLES THROUGH CONTROLLING THE BRAKE MOMENT AT THE TWO DRIVING WHEELS","authors":"Tai Tan Phan, Ha Thanh Ngo, Banh Thanh Huynh","doi":"10.35382/tvujs.1.46.2022.864","DOIUrl":"https://doi.org/10.35382/tvujs.1.46.2022.864","url":null,"abstract":"A vehicle differential is a device that divides engine power between the two driving wheels and allows the wheels to rotate at different speeds when the vehicle moves on the road. The speed difference depends mainly on the grip between the wheels and the road surface. When the traction acting on both driving wheels is equal,the differential will distribute traction equally, helping the vehicle move stably on a straight road. However, if one of the two driving wheels rolls on a slippery road, the differential will distribute more engine power to this wheel. As a result, the vehicle’s motion is unstable, engine power is lost, the vehicle cannot move. To solvethe problem, using a limited-slip differential, an active differential or a traction control system is considered an optimal solution. This study uses the brake moment acting on the skidding wheel to redistribute the engine power at the two driving wheels and uses the PID method for traction control at the drive wheels. Survey results show the effectiveness of the designed controller.","PeriodicalId":159074,"journal":{"name":"TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127082646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-28DOI: 10.35382/tvujs.1.46.2022.860
Trang Doan Thuy Nguyen
In the current globalization context, Viet Nam’s traditional cultural values have had changes. Stemming from that situation, through content analysis of materials on books, newspapers and magazines before 1945, the author studies the issue of national literature education in Viet Nam based on the aspects of language, documents and teaching content, initially draws some lessons from the education of national conciousness in the current international integration process.
{"title":"THE ISSUE OF NATIONALISM IN NATIONAL LITERATURE EDUCATION IN VIETNAM BEFORE 1945 AND THE LESSONS FOR THE AGE OF GLOBALIZATION","authors":"Trang Doan Thuy Nguyen","doi":"10.35382/tvujs.1.46.2022.860","DOIUrl":"https://doi.org/10.35382/tvujs.1.46.2022.860","url":null,"abstract":"In the current globalization context, Viet Nam’s traditional cultural values have had changes. Stemming from that situation, through content analysis of materials on books, newspapers and magazines before 1945, the author studies the issue of national literature education in Viet Nam based on the aspects of language, documents and teaching content, initially draws some lessons from the education of national conciousness in the current international integration process.","PeriodicalId":159074,"journal":{"name":"TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132372474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-28DOI: 10.35382/tvujs.1.46.2022.868
A. Trinh, Thanh T. Nguyen, H. Phan, L. Nguyen, Thuy Nguyen Thi, Kim Nhu Tran Thi, Vy Mai, Tuyet Mai Nguyen Thi, Thuc Truong Vo
The study assessed the variations in nine agro-morphological characters among and within the black glutinous rice (Oryza sativa) population from Chau Thanh District, Tra Vinh Province. The nine quantitative agromorphological characters that were measured include culm length, leaf length, leaf width, number of panicles, panicle length, grain length, grain width, number of firm grain, and number of grain per panicle. The unweighted pair group method with arithmetic mean method and principal coordinate analysis by the NTSYS program were applied in this study to classify the nine agro-morphological characters. In addition, tocompare the variations in quantitative characters between O. sativa populations, one-way analysis of variance (ANOVA) was used. The results showed significant differences between the black glutinous rice populations for all quantitative agro-morphological characters. Moreover, some agro-morphological characters showed positive correlations to each other. The dendrogram generated from the analysis process of the agromorphological data divided the O. sativa populations into two groups with unfamiliar features. However, the O. sativa populations assessed exhibited a wide range of variations in morphological characteristics, both within the same population and among other populations with the same strains.
{"title":"EVALUATION OF GENETIC DIVERSITY OF THE BLACK GLUTINOUS RICE BASED ON AGRO-MORPHOLOGICAL CHARACTERS","authors":"A. Trinh, Thanh T. Nguyen, H. Phan, L. Nguyen, Thuy Nguyen Thi, Kim Nhu Tran Thi, Vy Mai, Tuyet Mai Nguyen Thi, Thuc Truong Vo","doi":"10.35382/tvujs.1.46.2022.868","DOIUrl":"https://doi.org/10.35382/tvujs.1.46.2022.868","url":null,"abstract":"The study assessed the variations in nine agro-morphological characters among and within the black glutinous rice (Oryza sativa) population from Chau Thanh District, Tra Vinh Province. The nine quantitative agromorphological characters that were measured include culm length, leaf length, leaf width, number of panicles, panicle length, grain length, grain width, number of firm grain, and number of grain per panicle. The unweighted pair group method with arithmetic mean method and principal coordinate analysis by the NTSYS program were applied in this study to classify the nine agro-morphological characters. In addition, tocompare the variations in quantitative characters between O. sativa populations, one-way analysis of variance (ANOVA) was used. The results showed significant differences between the black glutinous rice populations for all quantitative agro-morphological characters. Moreover, some agro-morphological characters showed positive correlations to each other. The dendrogram generated from the analysis process of the agromorphological data divided the O. sativa populations into two groups with unfamiliar features. However, the O. sativa populations assessed exhibited a wide range of variations in morphological characteristics, both within the same population and among other populations with the same strains.","PeriodicalId":159074,"journal":{"name":"TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099","volume":"1657 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129314478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-28DOI: 10.35382/tvujs.1.46.2022.855
T. Pham
In recent years, night tourism has been considered one of the current trends in the global tourism industry. Bac Lieu has many favorable conditions to develop night tourism, but the effectiveness is modest. Therefore, it is necessary to study the conditions for developing night tourism activities in Bac Lieu City. This study was conducted based on field research and the collection of secondary data. The SWOT analysis method was applied to identify and analyze conditions for developing night tourism activities in Bac Lieu City. Findings from data analysis make valuable recommendations for developing night tourism in Bac Lieu to contribute to local socioeconomic development.
{"title":"CONDITIONS FOR DEVELOPMENT OF NIGHT TOURISM ACTIVITIES IN BAC LIEU CITY, BAC LIEU PROVINCE, VIETNAM","authors":"T. Pham","doi":"10.35382/tvujs.1.46.2022.855","DOIUrl":"https://doi.org/10.35382/tvujs.1.46.2022.855","url":null,"abstract":"In recent years, night tourism has been considered one of the current trends in the global tourism industry. Bac Lieu has many favorable conditions to develop night tourism, but the effectiveness is modest. Therefore, it is necessary to study the conditions for developing night tourism activities in Bac Lieu City. This study was conducted based on field research and the collection of secondary data. The SWOT analysis method was applied to identify and analyze conditions for developing night tourism activities in Bac Lieu City. Findings from data analysis make valuable recommendations for developing night tourism in Bac Lieu to contribute to local socioeconomic development.","PeriodicalId":159074,"journal":{"name":"TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130838622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-28DOI: 10.35382/tvujs.1.46.2022.866
Trang Cong Nguyen, D. N. Phan, Hạnh Nguyễn Thị, Kim Ngan Nguyen Ngoc, Yen Loan Dang Ngo
This study focused on water quality assessment of farmed shrimp ponds in Binh Dai District, Ben Tre Province. The goals of the study were to provide chemical parameters of pond water for farmers, to identify problems and causes in farmed shrimp related to water quality and disease, and to help managers find appropriatesolutions to minimize damage to local shrimp farming. Water samples were collected monthly from January to June 2021 from 90 vannamei farmers in six different areas, including Vang Quoi Dong, Dinh Trung Binh Thoi, Phu Long, Phu Vang, and Binh Thang of Binh Dai District. Parameters investigated in this study included pH,alkalinity, NH4+, NH3, NO2- and three other minerals. Water quality parameters were analyzed based on APHA standard analysis methods. The results showed that the water quality of shrimp farming areas in Binh Dai fluctuated from time to time, and water quality parameters were suitable for vannamei shrimp farming. However, the concentration of NO2- was always higher than the permitted threshold. The results fromcluster analysis and MANOVA testing showed that water quality of the shrimp farming areas in Binh Dai was significantly different (p < 0.05), especially NO2-, Ca, Mg and alkalinity. These findings suggest that farmers must apply proper solutions for water quality management in each farming area to maximize crop production.
{"title":"WATER QUALITY STATUS OF WHITE LEG SHRIMP FARMING AREAS IN BINH DAI DISTRICT, BEN TRE PROVINCE, VIETNAM","authors":"Trang Cong Nguyen, D. N. Phan, Hạnh Nguyễn Thị, Kim Ngan Nguyen Ngoc, Yen Loan Dang Ngo","doi":"10.35382/tvujs.1.46.2022.866","DOIUrl":"https://doi.org/10.35382/tvujs.1.46.2022.866","url":null,"abstract":"This study focused on water quality assessment of farmed shrimp ponds in Binh Dai District, Ben Tre Province. The goals of the study were to provide chemical parameters of pond water for farmers, to identify problems and causes in farmed shrimp related to water quality and disease, and to help managers find appropriatesolutions to minimize damage to local shrimp farming. Water samples were collected monthly from January to June 2021 from 90 vannamei farmers in six different areas, including Vang Quoi Dong, Dinh Trung Binh Thoi, Phu Long, Phu Vang, and Binh Thang of Binh Dai District. Parameters investigated in this study included pH,alkalinity, NH4+, NH3, NO2- and three other minerals. Water quality parameters were analyzed based on APHA standard analysis methods. The results showed that the water quality of shrimp farming areas in Binh Dai fluctuated from time to time, and water quality parameters were suitable for vannamei shrimp farming. However, the concentration of NO2- was always higher than the permitted threshold. The results fromcluster analysis and MANOVA testing showed that water quality of the shrimp farming areas in Binh Dai was significantly different (p < 0.05), especially NO2-, Ca, Mg and alkalinity. These findings suggest that farmers must apply proper solutions for water quality management in each farming area to maximize crop production.","PeriodicalId":159074,"journal":{"name":"TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125741937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-28DOI: 10.35382/tvujs.1.46.2022.865
Lưu Thị Thúy Hải, Nga Huynh, L. Le
The Arbuscular Mycorrhiza fungi have a mutualistic relationship with 80% of terrestrial plants. Arbuscular Mycorrhiza fungi are considered as a biofertilizer source because of their positive effects on plant growth andproductivity They can help to reduce the amount of chemical fertilizers by up to 50% due to their ability in enhancing crops to uptake mineral nutrients efficently such as nitrogen, phosphorus, potassium, calcium, zinc. . . thereby increasing crop yield. Moreover, this endosymbiotic fungus also shows its potential as a biopesticide due to its ability to biologically antagonize a wide range of fungi, viruses, and nematodes, which cause diseases on plants. Besides, Arbuscular Mycorrhiza fungi also help plants to resist to abiotic streeses such as drought, salinity, and toxicity of heavy metals. The glomalin compound secreted by mycorrhizal fungi has the ability tobind tiny soil particles together to form a stable soil structure and aggregates, helping to improve soil qualitỵ Thus, Arbuscular Mycorrhiza fungi have a high use potential in sustainable agricultural development under the context of climate change such as drought, salinity intrusion.
{"title":"POTENTIAL BENEFITS OF ARBUSCULAR MYCORRHIZA FUNGI IN SUSTAINABLE AGRICULTURAL CULTIVATION","authors":"Lưu Thị Thúy Hải, Nga Huynh, L. Le","doi":"10.35382/tvujs.1.46.2022.865","DOIUrl":"https://doi.org/10.35382/tvujs.1.46.2022.865","url":null,"abstract":"The Arbuscular Mycorrhiza fungi have a mutualistic relationship with 80% of terrestrial plants. Arbuscular Mycorrhiza fungi are considered as a biofertilizer source because of their positive effects on plant growth andproductivity They can help to reduce the amount of chemical fertilizers by up to 50% due to their ability in enhancing crops to uptake mineral nutrients efficently such as nitrogen, phosphorus, potassium, calcium, zinc. . . thereby increasing crop yield. Moreover, this endosymbiotic fungus also shows its potential as a biopesticide due to its ability to biologically antagonize a wide range of fungi, viruses, and nematodes, which cause diseases on plants. Besides, Arbuscular Mycorrhiza fungi also help plants to resist to abiotic streeses such as drought, salinity, and toxicity of heavy metals. The glomalin compound secreted by mycorrhizal fungi has the ability tobind tiny soil particles together to form a stable soil structure and aggregates, helping to improve soil qualitỵ Thus, Arbuscular Mycorrhiza fungi have a high use potential in sustainable agricultural development under the context of climate change such as drought, salinity intrusion.","PeriodicalId":159074,"journal":{"name":"TRA VINH UNIVERSITY JOURNAL OF SCIENCE; ISSN: 2815-6072; E-ISSN: 2815-6099","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127994500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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