Papers by aung kyaw Myint
Journal of Agricultural Research, 2017
Abstracts of the Annual Meetings, Japanese Society of Soil Science and Plant Nutrition, 2006
... すべて CiNiiに本文あり CiNiiに本文あり、または連携サービスへのリンクあり. 15-6 The effects of organic manures on rice produ... more ... すべて CiNiiに本文あり CiNiiに本文あり、または連携サービスへのリンクあり. 15-6 The effects of organic manures on rice production and nitrogen availability in paddy soil. Kyaw Myint Aung; 九大院生資環府. 山川 武夫; 九大院農学院. 菊池 政道; 九大院農学院. 本文を読む／探す. ...
Abstracts of the Annual Meetings, Japanese Society of Soil Science and Plant Nutrition, 2009
Abstracts of the Annual Meetings, Japanese Society of Soil Science and Plant Nutrition, 2010
Microbes and Environments, 2009
The phylogenetic diversity of cowpea root-nodulating bacteria in the SouthWest of Japan was inves... more The phylogenetic diversity of cowpea root-nodulating bacteria in the SouthWest of Japan was investigated using 60 isolates. Seeds of cowpea were aseptically sown in vermiculite and inoculated with a suspension of Cowpea Soil (CS) or Bean Soil (BS) or without a soil suspension as a control. CS and BS were collected from the Kyushu University's farm (Japan) at sites where cowpea and bean, respectively, have been cultivated previously. Based on an analysis of the 16S rRNA gene and the Internal Transcribed Spacer (ITS) sequence between the 16S and 23S rRNA genes, 56 isolates were assigned to the genus Bradyrhizobium, while one isolate was found to be closely related to the genus Ralstonia. The ITS-based phylogeny showed 53 isolates, 2 isolates, and 1 isolate, to be closely related to B. yuanmingense, B. elkanii and B. japonicum, respectively, suggesting that B. yuanmingense strains predominated in the soils. Among the isolates tested, B. yuanmingense TSC10 and TTC9 exhibited a greater symbiotic activity and could be considered efficient inoculants for cowpea.
Journal of the Faculty of Agriculture Kyushu University, Oct 29, 2009
Journal of The Faculty of Agriculture Kyushu University, 2009
Green manuring with an N2-fixing legume crop can meet a substantial portion of rice N requirement... more Green manuring with an N2-fixing legume crop can meet a substantial portion of rice N requirement and provide organic matter to wetland rice soils to maintain soil fertility. Organic-N fertilizers in the form of flood-tolerant, leguminous, stem-nodulating Sesbania rostrata can be useful alternatives to resource- poor rice farmers if applied as green manure. Therefore, the accumulation of fixed N by this green manure, their effect on the performance and yield of rice was examined. Firstly, root and/or stem nodulation, nitro- gen fixation (acetylene-reducing activity), growth and N accumulation of S. rostrata as affected by inocula- tion site were studied in a pot experiment. The growth and N accumulation of S. rostrata in stem inocula- tion treatment was the highest. Therefore, stem inoculation method was used for growing S. rostrata to incorporate into the rice soils for the second experiment. In the second experiment, the effects of S. ros- trata green manure application on the gro...
American-Eurasian Journal of Agricultural and Environmental Science, 2010
Water availability in dryland crop production is influenced by the quantity of rainfall and soil ... more Water availability in dryland crop production is influenced by the quantity of rainfall and soil ability for holding it. To improve dryland agricultural productivity, understanding of crop water use through the growing season as affected by different residue management is necessary. Twoconsecutive seasons field experiments (monsoon and postmonsoon seasons of 2015-2016) were conducted at the Oilseed Crop Research Center, Magway. The experimental design was RCB factorial arrangements with three replications. Crop residue mulching at the rate of 5 t ha (M) and non-mulching (NM) were tested with five levels of cropping patterns: sesame-green gram (SS-GG), sesame-groundnut (SS-GN), groundnut-green gram (GNGG), groundnut-groundnut (GN-GN) and groundnut-sorghum (GN-SG). The objectives of the present study were to determine the grain yield and biomass production and water use efficiency of individual crops in the cropping patterns; and to investigate appropriate cropping sequences for bette...
Agronomy
The pigeon pea cyst nematode, Heterodera cajani, is an economically important plant-parasitic nem... more The pigeon pea cyst nematode, Heterodera cajani, is an economically important plant-parasitic nematode in sesame production. The objective of the study was to investigate distribution of H. cajani in the major sesame producing areas in Myanmar. Before cultivation, soil samples were collected in 96 local farmer’s fields: (19 fields in Magway, 20 fields in Mandalay, 14 fields in Sagaing and 43 in Nay Pyi Taw), and nematode density was quantified by real-time PCR. The cyst nematode was detected in 63.2% of the fields in Magway and the mean density was 22.6 eggs equivalent (20 g soil)−1. In Mandalay and Nay Pyi Taw, the cyst nematode was detected in 40.0% and 18.6% of the fields with the mean densities of 9.9 and 21.0 eggs equivalent (20 g soil)−1, respectively. By contrast, the cyst nematode was not detected in Sagaing fields, in which sesame is rotated with paddy rice. Infestation of root-knot nematodes (RKN, Meloidogyne spp.) was also evaluated, because sesame is generally rotated wi...
Science World Journal, 2010
A rice cultivation study was conducted at Kyushu University farm. Cow manure (CM), poultry manure... more A rice cultivation study was conducted at Kyushu University farm. Cow manure (CM), poultry manure (PM), rice straw + urea mix-application (SU), urea (UF) and M-coat, a slow released compound fertilizer (M-coat) were used as the N sources by comparing with no application (Control). Treatments were made with two levels application of each N source at 40 (level I) and 80 kg N ha-1 (level II) excluding M-coat. In all urea treatments, three split applications were made. A study of soil incubation was conducted for 2 weeks to investigate the mineralized N of applied mineral and organic fertilizer. Plant growth characters, dry matter, yield and plant nutrient accumulations were higher in mineral fertilization than organic. Mineral fertilization was observed in correlation with the larger crop removal. PM-II as an organic matter provided comparatively higher nutrient accumulations which in turn enhanced the growth and yield of rice. CM and SU gave the lower plant growth, yield and nutrient accumulation. Mineralized N was higher in sole mineral N applications. Organic matter with high C/N ratio provided very low mineralized N and its net N mineralization percentage. Negative values of net N mineralization percentage were observed in SU due to N immobilization.
日本土壌肥料学会講演要旨集, Sep 7, 2010
A rice cultivation study was conducted at Kyushu University farm. Cow manure (CM), poultry manure... more A rice cultivation study was conducted at Kyushu University farm. Cow manure (CM), poultry manure (PM), rice straw + urea mix-application (SU), urea (UF) and M-coat, a slow released compound fertilizer (M-coat) were used as the N sources by comparing with no application (Control). Treatments were made with two levels application of each N source at 40 (level I) and 80 kg N ha-1 (level II) excluding M-coat. In all urea treatments, three split applications were made. A study of soil incubation was conducted for 2 weeks to investigate the mineralized N of applied mineral and organic fertilizer. Plant growth characters, dry matter, yield and plant nutrient accumulations were higher in mineral fertilization than organic. Mineral fertilization was observed in correlation with the larger crop removal. PM-II as an organic matter provided comparatively higher nutrient accumulations which in turn enhanced the growth and yield of rice. CM and SU gave the lower plant growth, yield and nutrient accumulation. Mineralized N was higher in sole mineral N applications. Organic matter with high C/N ratio provided very low mineralized N and its net N mineralization percentage. Negative values of net N mineralization percentage were observed in SU due to N immobilization.
Soil Science and Plant Nutrition, 2008
Phosphite (Phi) may potentially supply phosphorus (P) nutrition to plants and is widely marketed ... more Phosphite (Phi) may potentially supply phosphorus (P) nutrition to plants and is widely marketed as a super P fertilizer for many crops. This study investigated the effects of Phi on growth and P nutrition in spinach (Spinacia oleracea L.). High-rate foliar application experiments designed to evaluate the phytotoxicity and P nutritional potential of different Phi formulations by foliar application at two rates (0.15 and 0.3% P 2 O 5) showed that all Phi formulations did not improve plant growth under different available P-soils, but rather significantly decreased shoot dry weight (DW) at the higher rate. In two other soil and hydroponic experiments, Phi was foliar applied at a low rate (0.05% P 2 O 5) and root P treatments were combinations of Phi and phosphate (Pi) at different Pi : Phi ratios for a high P level (the soil experiment) or a low P level (the hydroponic experiment). In both experiments, shoot DW decreased markedly as the Pi : Phi ratios decreased from 100:0 to 0:100 and Phi foliar application did not improve plant growth. In the soil experiment, plants grew poorest at 0:100, but grew well when both Phi and Pi were applied at a high rate of 115 mg P pot-1 , indicating that at this level Phi had a negative effect on only severely P-deficient plants. Root growth of no Pi-fertilized plants was strongly inhibited by Phi from either root or foliar application. In both experiments, P concentration drastically decreased with decreasing Pi : Phi ratios from 100:0 to 0:100, but increased substantially with foliar application of Phi compared with Pi, suggesting that Phi was absorbed poorly by the roots, but was well absorbed by the leaves compared to Pi. We conclude that Phi cannot be used as a P fertilizer for spinach via either root or foliar applications at low or high levels, and also that Phi has no beneficial effect on the growth of spinach. As Phi is now widely marketed as a P fertilizer for many crops, care should be taken in selecting Phi as a P fertilizer for a given crop.
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Papers by aung kyaw Myint