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Chuong, Nguyen Van
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Journal : Communications in Science and Technology

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The influences of lime and irrigation water on arsenic accumulation of rice, maize and mungbean in the nethouse condition Chuong, Nguyen Van
Communications in Science and Technology Vol 6 No 2 (2021)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.6.2.2021.515

Abstract

This research found the great hold of liming, soils and irrigation water on the arsenic (As) accumulation of rice, maize and mung bean in the nethouse research. Two greenhouse experiments had various plant types of rice, maize and mung bean with two soils inside and outside the dyke, two irrigated waters of 0.0 and 200 ?g As/L and three different lime ratios (0, 7.0 and 9.0 tons CaO/ha). The whole treatments were twenty one (12 treatments of experiment 1 and 9 of experiment 2) with 4 repetitions. The results of this study showed that the lime application raised both soil pH and crop yield. The arsenic (As) absorption of plant bodies in stems and seeds inside the dyke increased from 67.8 to 68.3% higher than those outside the dyke, respectively. The arsenic contents of stems and seeds with the treatments of 200 ?g As/L irrigation water were higher from 81.5 to 89.4% than that of non As irrigation water, respectively. The lime supplementation of 7.0 and 9.0 tons CaO per ha reduced the As accumulation of stems and seeds of rice, maize and mung bean was lower than the one without lime supplement from 38.6 (stems) and 54.5 (seeds). Mung bean absorbed the highest As, followed by rice and maize with the lowest As value. However, the lime supplementation of 9.0 tons CaO/ha had so high soil pH of soil that restricted the growth and yield of crops. More different lime concentrations need to search for more new details and new discovery of positive effects of this research.
Response of peanut quality and yield to chicken manure combined with Rhizobium inoculation in sandy soil Chuong, Nguyen Van
Communications in Science and Technology Vol 8 No 1 (2023)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.8.1.2023.1082

Abstract

Chemical fertilizers, which contain a nitrogen (N) element, has been intensively used to increase the peanut productivity. However, the unstable and high cost of N fertilizer, and the great demand for N fertilizer sources have strongly increased the strategical plan of nitrogen fixation (NF). Therefore, the field research was carried out to appraise the ability of Rhizobium sp. trains and chicken manure (CM) on the quality and yield of peanuts. This research has four ratios, which valued from 0.0, 2.0, 4.0 to 6.0 t CM per ha in the combination with the Rhizobium sp. inoculum, expect control treatment (without CM and Rhizobium sp.). Different rates of CM combined with Rhizobium sp. inoculation was added by using 6.0 tons CM/ ha, which had number of the highest peanut nodules. Research results observed that the inoculant of Rhizobium sp. strain combined with CM remarkably increased the yield components per plant such as biomass, number of nodules, weight of dry nodules, weight of fill and empty pods and fresh yield of groundnut. The highest yield and quality of peanut (7.60 t/ha), oil % (50.6%), seed protein percentage (26.8%), as well as NPK content in seed (4.32, 0.912 and 0.999%, respectively) were obtained under the application of NPK+6.0 t CM/ha+ Rhizobium sp. inoculation. Co-application of 6t CM/ha and Rhizobium sp. inoculation increased by 20.5% when compared without CM application and no Rhizobium sp. inoculation. The study showed that both possibility of nitrogen fixation of peanut and nitrogen uptake of the sandy soil were raised by field inoculant with effectiveness of Rhizobium sp. with animal manure application. In really, Rhizobium sp. inoculation and CM proved a great method to increase soil nutrients for subsequent crops and it helped to enhance the taking of nitrogen from the air into the crop soil.
The impact of bacillus sp. NTLG2-20 and reduced nitrogen fertilization on soil properties and peanut yield Chuong, Nguyen Van
Communications in Science and Technology Vol 9 No 1 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.1.2024.1423

Abstract

The excessive use of nitrogen (N) fertilizers has led to farmland degradation and reduced crop yields. To address this drawback, reducing the amount of nitrogen fertilizer and Bacillus sp. NTLG2-20 inoculant are the optimal cultivation method. The impact of different N rates (0, 20, and 40 kg ha-1) combined with the Bacillus sp. NTLG2-20 inoculant on soil chemical properties, growth, development, and peanut yield was designed in the field in Phuoc Hung commune, An Phu district from May to August 2023. The field experiment was designed with 6 treatments and 4 replications. The research results showed that different N rates adequately augmented soil chemical traits such as pH, cation exchange capacity (CEC), soil organic matter (SOM), total N, available phosphorous (AP), and exchangeable potassium (EK). Furthermore, different N fertilizers rates combined with Bacillus sp. NTLG2-20 inoculant adequately augmented plant height, number of leaves, total chlorophyll, nodulous number and weight per groundnut plant. Reducing N fertilizer application by 50% (20 kg N ha-1) was the optimal N reduction rate when combined with the Bacillus sp. NTLG2-20, which resulted in 17.6% higher peanut yield compared to no N application and no difference compared to 100% of recommended N application (P<0.01)). Bacillus sp. NTLG2-20 inoculant increased peanut yield by 19.6% when compared to no Bacillus sp. NTLG2-20 inoculant (P<0.01). Nitrogen – fixing ability of Bacillus sp. NTLG2-20 promoted peanut yield and reduced fifty percentage of the N fertilizer application. Bacillus sp. NTLG2-20 is the promising species for the production of biological fertilizer in the future.
Nitrogen fertilizer use reduction by two endophytic diazotrophic bacteria for soil nutrients and corn yield Chuong, Nguyen Van; Nguyen Ngoc Phuong, Trang; Nguyen Van, Thuan
Communications in Science and Technology Vol 9 No 2 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.2.2024.1527

Abstract

Today, the utilization of endophytic diazotrophic bacteria (EDB) purposely to minimize the application of urea fertilizer (UF), and enhance soil fertility, crop quality and corn yield in sustainable agricultural practices is an inevitable trend. The experiment was arranged outside the AGU green house of Agriculture Research Center, An Giang university, Vietnam, which consisted of two factors: (i) two EDB species [Bacillus sp. NTLG2-20 (Bacillus A) and Bacillus arybhattai strain CM44 (Bacillus B)] and (ii) three UF ratios (0.0, 100 and 200 kg N ha-1) and four replications. Research data presented that the fresh cob yield of Bacillus A was found 4.0% higher than that of Bacillus B and 12.7% than that of non EDB inoculation. Furthermore, the inoculation of Bacillus B had 9.02% higher fresh cob yield compared to non-inoculation. The 50% reduction of UF application combined EDB addition obtained the fresh cob with no significant difference, compared to 100% recommended urea application. The interaction between the effectiveness of EDB inoculation and UF reduction was clearly different in favor of corn grown on sandy loam soils with low nutrient contents. Both Bacillus A and Bacillus B had the abilities of high yield and good nitrogen fixation with the potential to simultaneously improve soil fertility and corn yield. The results of this study demonstrated that two strains of Bacillus A and Bacillus B have the potential to promote the growth and increase the yield of peanuts, and it should be suggested for future biological fertilizer production.
Enhanced Soil Fertility and Baby Maize Yield Through Bacillus megaterium CM2 under Reduced Nitrogen Input Chuong, Nguyen Van; Vu, Tran Minh; Tuan, Le Minh; Son, Nguyen Thi Thai; Tri, Tran Le Kim; Thuan, Nguyen Van; Dang, Phan Tran Hai; Liem, Tran Thanh; Trang, Nguyen Ngoc Phuong
Communications in Science and Technology Vol 10 No 2 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.2.2025.1832

Abstract

This present study evaluated the effectiveness of Bacillus megaterium CM2 (strain CM2) as a biofertilizer for the enhancement of soil fertility and baby maize (Zea mays L.) productivity under reduced nitrogen (N) input in the Mekong Delta, Vietnam. A field experiment was conducted using a randomized complete block design (RCBD) featuring five treatments combining strain CM2 inoculation and varying nitrogen fertilizer rates. Each treatment was replicated four times. The treatments included a non-inoculated control receiving the full recommended N rate (350 kg urea ha−1) and four strain CM2-inoculated treatments supplied with 100%, 75%, 50%, and 25% of the recommended N dose (350, 262.5, 175, and 87.5 kg urea ha−1, respectively). Laboratory characterization demonstrated that strain CM2 possessed high nitrogenase activity, strong thermotolerance, and broad adaptability, confirming its suitability for field application. In comparison with the non-inoculated control, strain CM2 inoculation under reduced N regimes significantly improved soil chemical properties, including soil pH, cation exchange capacity, soil organic matter, total nitrogen, available phosphorus, and exchangeable potassium. This present study revealed overall soil fertility indicators exhibited an increase by approximately 10–95%, with the lowest responses as observed in under treatments subjected to 25% and 57% reductions in nitrogen fertilizer application. Whilst the most pronounced enhancement were recorded at the 50% N reduction level, particularly for pH (6.99), CEC (14.8 cmol+ kg−1), and SOM (2.99%). Thirty days after sowing, CM2-inoculated plants exhibited substantial increases in leaf number (32%), chlorophyll content (17%), and plant height (19%) relative to uninoculated control. Furthermore, yield performance was also substantially enhanced, with total edible cob yield reaching 2.98 t ha−1 and the proportion of grade-1 cobs increasing to 65.8%, corresponding to yield gains of 12.9% and 27.6%, respectively. The enhancement observed were attributed to enhanced biological nitrogen fixation, phytohormone-mediated growth promotion, and improved nutrient acquisition efficiency. The integration of strain CM2 with 25–50% reduced N fertilization-maintained yield and improved soil fertility, highlighting its potential as an eco-friendly microbial inoculant for sustainable baby maize cultivation.
Co-Authors Dang, Phan Tran Hai Liem, Tran Thanh Nguyen Ngoc Phuong, Trang Nguyen Van, Thuan Son, Nguyen Thi Thai Thuan, Nguyen Van Trang, Nguyen Ngoc Phuong Tri, Tran Le Kim Tuan, Le Minh Vu, Tran Minh