The Journal of Agriculture and Development最新文献_第7页

Determination of factors influencing Vietnamese consumption of traceable fisheries food: A case study in Ho Chi Minh City 确定影响越南可追溯渔业食品消费的因素:以胡志明市为例

The Journal of Agriculture and Development Pub Date : 2022-08-31 DOI: 10.52997/jad.4.04.2022

Tien-Dung Mai, My H. Cao, Thom N. Ta

引用次数: 0

Effects of nitrogen and potassium levels on growth and quality of pot-planted vicks cultivars (Plectranthus hadiensis var. tomentosu (Benth. ex E. Mey.) Codd) in Ho Chi Minh City 氮、钾水平对盆栽黄瓜品种生长和品质的影响。(ex E. Mey.)在胡志明市

The Journal of Agriculture and Development Pub Date : 2022-08-31 DOI: 10.52997/jad.1.04.2022

Duong T. T. Pham, Hiep T. Ly, H. Le, Tien N. N. Ho, Tien N. Le

{"title":"Effects of nitrogen and potassium levels on growth and quality of pot-planted vicks cultivars (Plectranthus hadiensis var. tomentosu (Benth. ex E. Mey.) Codd) in Ho Chi Minh City","authors":"Duong T. T. Pham, Hiep T. Ly, H. Le, Tien N. N. Ho, Tien N. Le","doi":"10.52997/jad.1.04.2022","DOIUrl":"https://doi.org/10.52997/jad.1.04.2022","url":null,"abstract":"The study was conducted to determine the suitable dosages of nitrogen and potassium fertilizer for growth, quality and economic efficiency of Plectranthus hadiensis pot–planted. The experiment was carried out from April to June 2021 in the experiment field of faculty of Agronomy, Nong Lam University, Ho Chi Minh City. A two-factorial experiment was carried out in a completely randomized design (CRD) in three replications. The treatments consisted of 3 doses of nitrogen fertilizer (0.50; 1.00 (control) and 2.00 g N/pot) and 4 doses of potassium fertilizer (0.25; 0.50; 1.00 (control) and 2.00 g K2O/pot) in combinations. The results indicated that plants supplied with 0.50 g N/pot and 1.00 g K2O/pot gave the best results in terms of plant height (16.70 cm), stem diameter (5.45 mm), number of primary branches (10.09 branches/ plant), canopy diameter (20.37 cm), number of leaves (201.04 leaves/plant), leaf length and width (35.06 and 24.13 mm), duration on vase life (40.00 days), commercial pot ratio (94.67%). The revenue was 29,933 thousand VND per 1000 pots with the highest profit margin of 1.33 times at 60 days after planting.","PeriodicalId":250563,"journal":{"name":"The Journal of Agriculture and Development","volume":"80 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128131721","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}

引用次数: 0

Role, absorption, and transport of calcium in the human body: A review 钙在人体内的作用、吸收和运输:综述

The Journal of Agriculture and Development Pub Date : 2022-08-31 DOI: 10.52997/jad.8.04.2022

Nhu B. Ma, B. Vo

引用次数: 0

Assessment of the efficiency of agricultural land use in the semi-arid area in Ninh Thuan province 宁顺半干旱区农业用地利用效率评价

The Journal of Agriculture and Development Pub Date : 2022-08-31 DOI: 10.52997/jad.7.04.2022

Thuy M. Ngo, T. Le, L. K. Nguyen, Quang T. Luong

{"title":"Assessment of the efficiency of agricultural land use in the semi-arid area in Ninh Thuan province","authors":"Thuy M. Ngo, T. Le, L. K. Nguyen, Quang T. Luong","doi":"10.52997/jad.7.04.2022","DOIUrl":"https://doi.org/10.52997/jad.7.04.2022","url":null,"abstract":"The agricultural land use in the semi-arid area has been defined as the semi-arid area of 99,089 ha, of which the agricultural land use type is 34,368 ha and the remaining area is forest land, nonagricultural land rivers, streams and unused land. Based on the results of the household survey (450 households), this study was to evaluate the effectiveness of agricultural land use on three factors: economic, social and environmental. Combining the effectiveness of the selected land use types, the land use types of fruit trees, maize-mungbean, and grass had a sustainable development status compared to other types of land use. Based on the assessment of agricultural land use efficiency, the proposal for agricultural land use and solutions to improving the efficiency of agricultural land use in the semi-arid region of Ninh Thuan province was as follows: 2,116 ha of one-crop rice to be converted to maize and mungbean cultivation; 698 ha of one-crop rice to be converted to one-crop rice and one-crop corn; increasing 337 ha for the growing of fruit trees (apples and grapes) and increasing the area of land used to grow grass for livestock.","PeriodicalId":250563,"journal":{"name":"The Journal of Agriculture and Development","volume":"34 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120994417","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}

引用次数: 0

Evaluation of the production process of biodegradable drinking straws from corn kernel 玉米粒生物可降解吸管生产工艺评价

The Journal of Agriculture and Development Pub Date : 2022-06-30 DOI: 10.52997/jad.8.03.2022

T. Le

{"title":"Evaluation of the production process of biodegradable drinking straws from corn kernel","authors":"T. Le","doi":"10.52997/jad.8.03.2022","DOIUrl":"https://doi.org/10.52997/jad.8.03.2022","url":null,"abstract":"New product development is one of the most effective methods to expand the economic value of corn, which is currently a low-cost agricultural material. The present study was conducted to determine the production process of straws from corn under the laboratory scale, in which the influence of mixing formula, steaming time, screw speed, and drying temperature on hardness and expansion time of the drinking straws from corn kernels. In addition, the biodegradability of the resultant straws was also tested in the natural environment. The study determined the most suitable recipe for producing the drinking straw product, including corn flour (75%), tapioca starch (20%), rice flour (5%), with the addition of 0.5% xanthan gum and 0.2% potassium sorbate (w/w). The operating conditions of steaming time (10 min), screw speed (40 rpm), and air drying temperature (40°C) were found to be the most appropriate. For the decomposition study, the results indicated that the drinking straw product was capable of decomposing after 40 days at a temperature 30 ± 2°C. As such, it can be concluded that it is highly potential to build up the production process of the drinking straws from corn kernels that are environmentally friendly and ease of practical applications.","PeriodicalId":250563,"journal":{"name":"The Journal of Agriculture and Development","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125303564","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}

引用次数: 0

Assessment of surface water quality and some main rivers’ capacity of receiving wastewater in Ca Mau province, Vietnam 越南金茂省地表水水质及主要河流污水处理能力评价

The Journal of Agriculture and Development Pub Date : 2022-06-30 DOI: 10.52997/jad.7.03.2022

T. Q. Le

引用次数: 1

Factors affecting the relationship quality between coffee farmers and local traders: A case study in a highland commune of Dak Lak, Vietnam 影响咖啡农与当地贸易商关系质量的因素:以越南达克莱克高原公社为例

The Journal of Agriculture and Development Pub Date : 2022-06-30 DOI: 10.52997/jad.1.03.2022

H. Hà

引用次数: 0

Effect of three different organic fertilizers on growth, yield, and essential oil content of basil (Ocimum basilicum var. pilosum) 3种有机肥对罗勒生长、产量及挥发油含量的影响

The Journal of Agriculture and Development Pub Date : 2022-06-30 DOI: 10.52997/jad.3.03.2022

Trang T. H. Nguyen

{"title":"Effect of three different organic fertilizers on growth, yield, and essential oil content of basil (Ocimum basilicum var. pilosum)","authors":"Trang T. H. Nguyen","doi":"10.52997/jad.3.03.2022","DOIUrl":"https://doi.org/10.52997/jad.3.03.2022","url":null,"abstract":"Basil (Ocimum basilicum var. pilosum) is an herbaceous plant species exhibiting various economic and medicinal values. This study was conducted to determine the effect of three different organic fertilizers, namely cow manure, worm castings manure, and Komix organic fertilizer, on the growth, yield, and essential oil content of basil in Thu Duc City. The results showed that using worm castings manure (25 tons/ha) decreased the growth parameters including the average height of main stems and the average number of leaves and lateral branches, whereas increased significantly the plant height (41.8 cm), stem diameter (6.0 mm), number of primary branches (13.5 branches), number of leaves (16.8 leaves), chlorophyll index (41.3) and number of shoots after regeneration (20.2 shoots), compared to the control. Besides, using worm castings manure (25 tons/ha) also helped increase the average fresh weight of basil stems and leaves (93.3 g/plant), theoretical yield (24.9 tons/ha), actual yield (14.7 tons/ha), essential oil content (0.5 mL) /100 g), and yield of essential oil (1.1 L/ha). The study also confirmed that using worm castings manure (25 tons/ha) created the highest economic efficiency with total profit reaching 737,570,000 VND/ha/3 harvests while using worm castings manure at a rate of 5 tons/ha gave the highest real rate of return (3.26).","PeriodicalId":250563,"journal":{"name":"The Journal of Agriculture and Development","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114549448","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}

引用次数: 0

Detection of Newcastle disease virus and H5-subtype Influenza virus in swiftlet houses by Multiplex reverse transcription PCR assay 多重反转录PCR法检测小燕房内新城疫病毒和h5亚型流感病毒

The Journal of Agriculture and Development Pub Date : 2022-06-30 DOI: 10.52997/jad.4.03.2022

P. X. Dinh

{"title":"Detection of Newcastle disease virus and H5-subtype Influenza virus in swiftlet houses by Multiplex reverse transcription PCR assay","authors":"P. X. Dinh","doi":"10.52997/jad.4.03.2022","DOIUrl":"https://doi.org/10.52997/jad.4.03.2022","url":null,"abstract":"The purpose of this study was to investigate the presence of Avian paramyxovirus 1 (APMV-1), also known as Newcastle disease virus (NDV), and Avian influenza type A, especially H5 subtype (AIV-H5) in swiftlet houses and swiftlet nest by multiplex RT-PCR (mRT-PCR). The assay used two specific primer pairs designed to detect the conserved sequence of the F gene of NDV and the HA gene of the AIV-H5, with product sizes of 282 bp and 420 bp, respectively. The mRT-PCR was established with detection limit of 25 copies/reaction for each target virus. The thermal cycle was optimized as follows: cDNA synthesis at 45ºC for 20 min, an initial denaturation at 95ºC for 5 min, followed by 35 cycles of amplification encompassing denaturation at 95ºC for 30 sec, annealing at 58ºC for 30 sec, and extension at 72ºC for 45 sec, ending by a final extension step at 72ºC for 7 min. Eighty-eight field samples including feces and swabs of the nest surface were examined and all samples were confirmed to be negative for these two viruses. The results of this study indicated that the swiftlet nests and the environment of swiftlet houses were not contaminated with NDV or AIV-H5 viruses. Moreover, the established mRT-PCR protocol had good specificity, detection limit, and can apply for routine veterinary diagnosis.","PeriodicalId":250563,"journal":{"name":"The Journal of Agriculture and Development","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123021875","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}

引用次数: 0

Effects of different loading densities during transport on survival rates of Asian seabass (Lates calcarifer Bloch, 1790) juvenile 运输过程中不同装载密度对亚洲海鲈幼鱼成活率的影响

The Journal of Agriculture and Development Pub Date : 2022-06-30 DOI: 10.52997/jad.5.03.2022

N. T. Dinh

{"title":"Effects of different loading densities during transport on survival rates of Asian seabass (Lates calcarifer Bloch, 1790) juvenile","authors":"N. T. Dinh","doi":"10.52997/jad.5.03.2022","DOIUrl":"https://doi.org/10.52997/jad.5.03.2022","url":null,"abstract":"This study was carried out to evaluate effects of loading density on water quality and survival rate of Asian seabass (Lates calcarifer) juvenile during live transport. The experiment included four treatments of different biomass: 50 kg/m3 (T1), 70 kg/m3 (NT2), 90 kg/m3 (T3) and 110 kg/m3 (T4) with three replicates for each treatment. The fish with an average weight of 20.50±0.25 g and length of 11.52±0.22 cm were fasted for 24 h before transporting in aerated and oxygenated heat-insulating tanks. The water temperature in transport was set at 22⁰C and the concentration of isoeugenol was 6 ppm. The fish was acclimatized to the transport temperature by gradually cooling water with ice to 22⁰C for 30 minutes. Then, fish were transferred to transport tanks containing 40 L water and closed with lids. After transporting, the fish were kept in hapas suspended in an earthen pond with routine management. Water quality and survival rates of the fish were recorded after transport 6 h and 12 h (end of experiment), and 3 and 7 days after the end of transporting. The results showed that the water quality was declined expressed by the decrease of DO and pH, and the increase of CO2, TAN and NO2 during transport but still in suitable ranges for seabass. The survival rates of the fish of all treatments were reduced following transport duration. The fish were well recoverd after the transport. At the end of the study, the survival rate of the fish of T1 was highest (96.00%), followed by T2 (95.33%), T3 (90.00%) and T4 (87.63%). Based on accumulated mortality, loading biomass of 70 to 90 kg/m3 and 50 to 70 kg/m3 were reccomended for live transport of seabass juvenile in cooling water (22⁰C) and sedation with isoeugenol (6 ppm) during 6 h and 12 h, respectively.","PeriodicalId":250563,"journal":{"name":"The Journal of Agriculture and Development","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127485019","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}

引用次数: 0