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토양환경 분야PS-20 : 몰리브덴이 헤어리베치의 Nitrogenase와 Nitrate Reductas 활성에 미치는 영향
파리둘알람 ( Faridul Alam ),김송엽 ( Song Yeob Kim ),김태영 ( Tae Young Kim ),이용복 ( Yong Bok Lee ) 한국환경농학회 2014 한국환경농학회 학술대회집 Vol.2014 No.-
Hairy vetch ( Vicia villosa Roth) is a winter annual legume used in single or mixtures with barley, the most popular used as green manure in Korea. Molybdenum (Mo) is one of the micronutrients, plays an important role in nitrogen fixation of legume plant. Mo acts as a co. factor of the protein in the synthesis of nitrogenase complex, which is responsible for conversion of nitrogen (N2) into ammonium in the process of nitrogen fixation. A pot experiment was conducted in green house during 2012 to study the effect of Mo in nodulation, nitrogenase activity, nitrate reductase activity and biomass production in vegetative and flowering stage of hairy vetch. In this study, Mo was applied 0, 0.25, 0.5, 1.0 and 2.0 kg ha-1. Nitrogenase activity of hairy vetch root nodules was measured by acetylene reduction assay to know the effective nitrogen fixation. Nitrate reductase activity and others chemical properties were measured according to standard protocol. Molybdenum application increases nodule number, nodule weight, above ground biomass, root biomass, nitrogenase activity and nitrate reductase activity compared to control plant. Among the treatments, Mo application 1kg ha.1 treated plants showed the highest nodule number and nodule mass in vegetative stage and flowering stage. These results indicated that 1kg Mo ha.1 treated plant produced higher nodule number and nodule weight, which might be attributed to nitrogenase activity in nodules that in turn enhanced N2 fixation. Plants that received same treatment showed the highest above ground biomass yield (5.01 g plant.1) and root biomass yield (0.35 g plant.1) in flowering stage. The highest nitrogenase activity (1797.5 μl C2H4 plant.1 hr.1) and nitrate reductase activity (2.1 mg kg.1) in root were recorded in 1 kg Mo ha.1 treated plant in flowering stage, which were also higher than vegetative stage. Therefore, optimum Mo application rate was 1kg Mo ha.1, which was probably the appropriate dose that showed better performance in biomass production of hairy vetch plant.
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04 포스터 발표 : 토양 환경 분야(PS) ; PS-24 : 국내 토양의 가용성 Mo 함량과 헤어리베치 질소 고정력과의 관계 조사
윤영은 ( Young Eun Yoon ),파리둘알람 ( Faridul Alam ),임종욱 ( Jong Uk Im ),이용복 ( Yong Bok Lee ) 한국환경농학회 2015 한국환경농학회 학술대회집 Vol.2015 No.-
Hairy vetch (Vicia villosa Roth) is an annual legume cover crop that is generally used as a green manure which fixes atmospheric nitrogen through the process of biological nitrogen fixation (BNF). Molybdenum is a trace element found in the soil and is required for growth of rhizobia that has been utilized by hairy vetch plant. Molybdenum (Mo) acts as a cofactor of nitrogenase (NA) enzyme that participates in reduction reactions in root nodules of hairy vetch plants during BNF. Ten soil samples were collected from different locations in South Korea and analyzed available Mo content in soil. An experiment was carried out with ten locations soil considering native soil as control and Mo was applied at 2 kg ha-1 to evaluate Mo response on nodule characteristics, nitrogenase (NA) activity and biomass yield of hairy vetch plant. Available Mo content was found in average of 0.2 mg kg-1. Molybdenum received hairy vetch plants increased nodule numbers, nodule dry weight, NA enzyme activity and biomass yield as compared to native soil (no Mo addition). Molybdenum treated plant showed significantly higher nodule numbers (site1, site2, site3, site4, site7, site8 and site9) and nodule dry weight (site1, site2, site3, site4, site8 and site9) compared to native soils and other locations soils, respectively. Molybdenum treated plant showed 67% higher average nodule numbers as compared to the plants that grown in native normal soil. Nitrogenase activity in Mo treated plants recorded significantly higher in site 1, site 2, site 3, site 4, site 5, site 8, and site 9 soils, respectively that in turn, increased BNF and ultimately led to higher biomass yield in hairy vetch. The NA of Mo treated plants increased on average 194% higher as compared to the plants that grown in native normal soil. The plant received Mo showed significantly higher aboveground biomass in site 6, site 8, site 10, and root biomass in site 2, site 4, site 7, and site 8 soils, respectively. The average aboveground biomass and root biomass of Mo treated plants significantly increased on 19% and 37.5% higher as compared to the plants that grown in native normal soil. Therefore, Mo content was found lower in collected soil, and addition of 2 kg Mo ha-1 in native soil had response to improve biochemical properties in nodules that might be increased N fixation and biomass yield in of hairy vetch.
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