Journal Articles - Agriculture, Forestry and Fishery - 2021

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  • Publication
    Biodegradation competence of Streptomyces toxytricini D2 isolated from leaves surface of the hybrid cotton crop against β cypermethrin
    ( 2021)
    Kanda Whangchai
    ;
    Tran Van Hung
    ;
    Sarah Al-Rashed
    ;
    Mathiyazhagan Narayanan
    ;
    Sabariswaran Kandasamy
    ;
    Arivalagan Pugazhendhi
    The frequent application of β cypermethrin in farming activity, causing severe soil and water contamination. Thus, finding a suitable microbial agent to degrade the toxic pesticide into less or nontoxic components is vital. Hence, β cypermethrin-resistant predominant bacteria from the pesticide-exposed surface of cotton leaves were isolated and optimized the growth conditions required for the significant degradation of β cypermethrin. Six dominant bacterial cultures were isolated from pesticide exposed cotton leaf samples, and among them, COL3 showed better tolerance to 6% of β cypermethrin than others. This COL3 was identified as Streptomyces toxytricini D2 through the 16S rRNA analysis. The suitable growth requirements of S. toxytricini D2 were optimized with various essential growth parameters to degrade β cypermethrin and the results showed that a significant degradation of β cypermethrin was observed at 35 °C, pH 8.0, 1.5% of inoculum, and nutritional factors like glycerol (20 mg L−1), ammonium sulfate (15 mg L−1), and calcium phosphates (10 mg L−1) were served as better carbon, nitrogen, and phosphate sources respectively. The degradation percentage and half-life of β cypermethrin were calculated as 80.71 ± 1.17% and 48.15 h respectively by S. toxytricini D2. The GC-MS analysis results showed that S. toxytricini D2 effectively degraded the β cypermethrin into 5 components such as methyl salicylate, phenol, phthalic acid, 3-phenoxy benzaldehyde, and 3-PBA. This is the first report, revealed that the S. toxytricini D2 belongs to the Actinobacteria has the potential to degrade the β cypermethrin into less or nontoxic metabolites under optimized conditions.
  • Publication
    Vai trò của ngành nông nghiệp trong quá trình công nghiệp hóa, hiện đại hóa Vùng kinh tế trọng điểm vùng Đồng bằng sông Cửu Long
    ( 2021)
    Lê Phan Thanh Hòa
    Vùng kinh tế trọng điểm (KTTĐ) Vùng đồng bằng sông cửu Long (ĐBSCL) là vùng kinh tế nông nghiệp (KTNo) lớn của cả nước. Thời gian qua, Vùng đã được chú trọng phát triển và có những đóng góp đáng kể vào sự phát triển chung của đất nước. Tuy nhiên, thực tế việc phát huy vai trò của nông nghiệp trong công nghiệp hóa, hiện đại hóa (CNH, HĐH) Vùng KTTĐ Vùng ĐBSCL vẫn còn những hạn chế cần tháo gỡ. Bài viết tập trung đề xuất một số giải pháp phát huy vai trò nông nghiệp trong tiến trình CNH, HĐH Vùng KTTĐ Vùng ĐBSCL.
  • Publication
    The Impacts of Spatial Interaction on Agricultural Productivity and Average Income: A Case of Vietnam
    ( 2021)
    Bac Truong Cong
    ;
    Tran Quang Van
    Agricultural productivity plays a crucial role in sustainable development while income is one of the most critical indicators that manifest the living standards; therefore, both of these aspects have attracted much attention from the national level to the provincial level. Yet, for various reasons, the importance of regional linkages, especially spatial interaction in the analysis of agricultural productivity and the average income, is not recognized and thus ignored in economic policies. Taking Vietnam as the study area, this paper examines the impact of spatial interaction between metropolises and provinces on agricultural productivity and income per capita of provinces.  In order to evaluate the impacts, this paper uses a gravity model to estimate the spatial interaction then panel data analysis is employed to interpret the influences. The data used in this study is collected from the General Statistics Office of Vietnam in the period from 2015-2018. The results show a positive correlation between spatial interaction between metropolis and provinces to provincial change, including agricultural productivity and average income. As such, stronger linkages with metropolises through improving transportation systems could enhance agricultural productivity and income in the province