Nghia Khoi Nguyen

Can Tho University, Cantho City, Vietnam · Department of Soil Sciences, College of Agriculture and Applied Biology

Indigenous microorganisms (IMO) have great potential in agricultural uses since they have high ability in biodegradation, nitrogen fixation, phosphate solubilization, plant growth hormone production as well as bio-control. However, deep scientific knowledge about IMO has been limited and should be elucidated. The aim of this study was to isolate an...

nh giá khả năng phòng trị bệnh thán thư trên ớt do nấm Colletotrichum sp. của 2 dòng vi khuẩn Bacillus sp. M3 và Bacillus sp. G5 ở điều kiện phòng thí nghiệm và nhà lưới ABSTRACT The study was aimed to evaluate the efficacy of anthracnose control in chillis caused by Colletotrichum sp. of two bacterial strains including Bacillus sp. M3 and Bacillus...

Từ khóa: Bã bùn mía, kích thích sinh trưởng cây trồng, nước thải biogas, phân hữu cơ, rau xà lách ABSTRACT The study aimed to recycle the biogas digester to produce solid organic fertilizer and its effect on growth and yield of lettuce (Lactuca sativa) under greenhouse condition. Biogas effluents were absorbed into coal slag and mixed with a sugarc...

Mục tiêu của nghiên cứu nhằm khảo sát hiệu quả của chế phẩm vi sinh NPISi lên sinh trưởng, năng suất hành lá và một số đặc tính đất ở điều kiện nhà lưới. Chế phẩm vi sinh NPISi được bổ sung ở các mức 80, 60, 40 kg/ha kết hợp bón phân hóa học theo khuyến cáo 100N-85P2O5-40K2O và giảm 25% NP (75N-63,75P2O5-40K2O). Kết quả cho thấy nghiệm thức bổ sung...

This study evaluated the effects of some environmental conditions on IAA biosynthesizing capacity of four nitrogen fixing bacteria, namely Paenibacillus cineris TP-1.4, Bacillus megaterium MQ-2.5, Klebsiella pneumoniae OM-17.2, and Pseudomonas boreopolis CP-18.2. Carbon source, pH, NaCl, and tryptophan supplement treatments were set to investigate...

ARTICLE INFO ABSTRACT Received: 30/12/2021 Indigenous microorganisms (IMO) have great potential in agricultural uses since they have high ability in biodegradation, nitrogen fixation, phosphate solubilization, plant growth hormone production. However, deep scientific knowledge about IMO's growth-promoting effect and vegetable yield has been limited...

The objective of the study was to utilize the biogas effluents to produce solid and liquid organic fertilizers, as well as evaluate their effect on the growth and yield of corn and mung beans under field conditions. For liquid organic fertilizer, biogas effluents were mixed with fish emulsion and beneficial bacteria while biogas effluents-absorbing...

The aim of this study was to isolate and select salt tolerant bacteria having both functions in phosphorus solubilization and phosphatase synthesis from rice-shrimp farming soil in saline areas in Mekong River Delta of Vietnam. Phosphorus solubilizing bacteria were isolated on National Botanical Research Institute's Phosphate (NBRIP) agar medium co...

Indigenous microorganisms (IMO) are widely used in agriculture due to their high ability in bio-degradation and bio-composting. However, their abilities in the decomposition of organic materials are still limited and should be clarified. This study aimed to assess fifteen IMOs’ ability to decompose the rice straw, sugarcane bagasse, coco peat, sawd...

Nghiên cứu thực hiện nhằm phân lập vi khuẩn kích thích sinh trưởng cây trồng từ lá thực vật. Môi trường nuôi cấy ammonium mineral salt (AMS) được sử dụng để phân lập vi khuẩn. Kết quả đã phân lập được 28 dòng vi khuẩn từ lá của 6 loài thực vật khác nhau gồm mồng tơi (Basella rubra L.), hoa hồng (Rosa chinensis Jacq.), chiều tím (Ruellia brittoniana...

Nghiên cứu nhằm tìm ra dòng vi khuẩn đối kháng tốt với nấm Rhizoctonia solani gây bệnh chết gục cây con trên ớt được phân lập từ 4 hạt ngũ cốc gồm gạo, bắp, đậu nành và mè lên men trên môi trường De Man, Rogosa and Sharpe (MRS) agar. Thí nghiệm khảo sát khả năng đối kháng được thực hiện trên môi trường PDA với 4 phương pháp bố trí gồm: (1) vi khuẩn...

Phenol là một hợp chất hữu cơ thơm có công thức phân tử C6H5OH, có tính độc hại cho con người và động vật, thường được tìm thấy trong nước thải và bùn cống rãnh. Mục tiêu của nghiên cứu nhằm khảo sát ảnh hưởng của một số yếu tố môi trường lên khả năng phân hủy phenol của ba dòng nấm men phân lập từ mẫu đất bùn đáy ao ở khu xả nước thải từ phòng thí...

Silicate solubilizing bacteria (SSB) are key microorganisms to solubilize silicate minerals in the soil. Silicon helps to increase the growth and yield of plants and to enhance the environmental stress tolerance capability of plants. The aim of this study was to evaluate the effect of several factors like pH, salinity, and temperature on silicate s...

This study assessed antagonistic capacity of various indigenous microorganisms (IMO) collected from different cropping systems within SocTrang province against plant pathogenic fungus including Fusarium oxysporumand Rhizoctonia solani. Biocontrol activity of fifteen collected IMOs was investigated on PDA agar media for 5-7 days under laboratory con...

The color pollution is typical in the textile wastewater and requires a lot of costs for treatment. This study aim to investigate the ability to degrade Congo Red dye in the group of popular diazo dyes by selected strains which were isolated from typical textile dyes in Vietnam. Some influence factors such as shaking conditions, adding sugar source...

Indigenous microorganism (IMO) has great potential for agricultural uses since they have high ability in biodegradation, nitrogen fixation, phosphate solubilization, plant growth hormone production as well as bio-control. This study aimed to determine the presence of some different major groups of microbes in IMO from different agri-ecosystem habit...

Từ khóa: đạm, kích thích nảy mầm, kích thích sinh trưởng, rau muống, vi khuẩn cố định đạm, vi khuẩn tổng hợp IAA ABSTRACT The study was aimed to investigate the seed germination and growth promoting capacity of eight bacterial strains capable in both nitrogen-fixation and IAA synthesis for water spinach under the laboratory and pot condition. The s...

Indigenous microorganism (IMO) has great potential in agricultural uses since they have high ability in biodegradation, nitrogen fixation, phosphate solubilization, plant growth hormone production as well as bio-control. However, deeply scientific knowledge about IMO has been limited and should be elucidated. The aim of this study was to isolate ba...

Phosphorus is the least mobile element in plant and soil contrary to other macronutrients. Phosphorus solubilizing bacteria play role in phosphorus nutrition by enhancing its availability to plants. Aim of study was to deal with isolation, characterization and identification of phosphate solubilizing bacteria (PSBs) from 15 paddy rice soil samples...

In biofertilizer production, carriers and substrates have an important role in maintaining an efficacy of the commercial biofertilizer by-product. The aim of this study was to select the best carrier material and substrate and as well substrate’s moisture to sustainably store biofertilizer by-product containing three halophilic plant growth promoti...

Bio-fertilizer formulation from indigenous microorganism communities (IMOCs) is great suitable methods applied widely in the eastern part of world for the extraction of minerals, enhancement of agriculture and waste management although its functionalities have been unknown. The aim of this study was to assess phosphate solubility, indole-3-acetic a...

Weedy rice is a biosimilar rice with biological characteristics that identify it as a weed. Weedy rice origin is complex as it appears that wild rice and cultivated rices have contributed to the high population variability. Plants are characterised mainly by vigorous vegetative growth, great morphological variation, asynchronous maturity and early...

To evaluate the effect of biomixture including spent coffee ground and milled egg-shells (ratio of 10:2 (w/w)) on the yield of Okra (Abelmoschus esculentus Moench) and soil fertility, an experiment was conducted in the greenhouse for 3 months with four replicates for each treatment. The soil sample in this study was collected from the experimental...

Background: Rice is a major field crop of paramount importance for global food security. However, the increased adoption of more profitable and resource-efficient direct-seeded rice systems (DSR) has contributed to greater weed infestations including weedy rice that has become a severe problem in several Asian regions. In this study we have develo...

Từ khóa: Biochar, sự cố định, vi khuẩn Paracoccus sp. P23-7, phân hủy sinh học, Propoxur và dung dịch nuôi cấy ABSTRACT The aim of this work was to investigate the effectiveness of different inoculation approaches in enhancing the biodegradation of the pesticide Propoxur in the liquid medium. Inoculation was conducted with the Paracoccus sp. P23-7...

Title: Effect of biomixture containing used coffee ground and milled eggshells on the yield of Okra (Abelmoschus esculentus Moench) and soil fertility under greenhouse conditions Từ khóa: Bã cà phê đã sử dụng, vỏ trứng, hỗn hợp hữu cơ, đậu bắp (Abelmoschus esculentus Moench), năng suất và dinh dưỡng đất ABSTRACT To evaluate the effect of biomixture...

Từ khóa: Biochar, vi khuẩn Paracoccus sp. P23-7, sự cố định, dung dịch nuôi cấy và Propoxur ABSTRACT The objective of this study was to investigate the immobilization capacity of biochar for the pesticide Propoxur degrading bacteria, Paracoccus sp. P23-7. The experiment was conducted in 25 mL minimal salt medium solution containing 50 ppm Propoxur...

Từ khóa: Phân hủy sinh học, Biochar, vi khuẩn Paracoccus sp. P23-7, sự cố định vi khuẩn, đất và Propoxur ABSTRACT The aim of this study was to investigate the effectiveness of different inoculation approaches in enhancing the biodegradation of the pesticide Propoxur in soil medium. Inoculation was conducted with the Paracoccus sp. P23-7 originally...

To find out bacterial isolates having ability to degrade Paclobutrazol (PBZ), a plant flowering regulator, four soil samples were collected from four different orchard gardens located in Cho Lach, Ben Tre; Cai Lay, Tien Giang and Phong Dien, Can Tho (2 samples) where farmers have intensively applied PBZ in their gardens for a long history. Bacteria...

Isolation of native bacterial strains having a degradation capacity for PBZ originate from orchard gardens in some provinces of Mekong Delta, Vietnam

Halogenated carbazoles have recently been detected in soil and water samples, but their environmental effects and fate are unknown. Eighty-four soil samples obtained from a site with no recorded history of pollution were used to assess the persistence and dioxin-like toxicity of carbazole and chlorocarbazoles in soil under controlled conditions for...

Three soil samples from onion fields which had a history of intensive application of Propoxur at Vinh Chau, Soc Trang were collected for isolating bacteria being capable to degrade specifically Propoxur. Soil bacteria were enriched in mineral salt medium solution containing 30 ppm Propoxur as the only carbon source for bacterial growth. The whole p...

Từ khóa: Chất kích thích ra hoa, Paclobutrazol, phân hủy sinh học, vi khuẩn phân lập ABSTRACT To find out bacterial isolates having ability to degrade Paclobutrazol (PBZ), a plant flowering regulator, four soil samples were collected from four different orchard gardens located in Cho Lach, Ben Tre; Cai Lay, Tien Giang and Phong Dien, Can Tho (2 sam...

Glyphosate is the most widely used herbicide worldwide. Although glyphosate is believed to be a relatively safe compound because of its fast degradation, nowadays glyphosate and one of its principal metabolites (aminomethylphosphonicacid) are frequently detected in ground water. Inspite of the numerous studies concerning the effect of soil properti...

Aged creosote and diesel fuel polluted soil was collected from Resecentrum, Uppsala (deposited at Hovgården). The aims of this study were: 1) to compare the growth and degradation of PAHs and diesel by five Salix clones and 2) to study the effect of nutrients on biodegradation of PAHs and diesel. Three kinds of soil were included in this study: cre...