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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.
단보 : 시설재배지 토양의 화학적 특성변화에 영향을 미치는 주요 인자 선발
윤영은 ( Young Eun Yoon ),김장환 ( Jang Hwan Kim ),김송엽 ( Song Yeob Kim ),임종욱 ( Jong Uk Im ),공명석 ( Myung Suk Kong ),이영한 ( Young Han Lee ),이용복 ( Young Bok Lee ) 한국환경농학회 2015 한국환경농학회지 Vol.34 No.4
BACKGROUND: Changes in Korea’s agricultural soil properties were analyzed at a four-year interval from 1999 to 2002 on a national scale and used as basis for the determination of the appropriate agricultural policy on maintaining food safety and soil quality. The scope of this study ideally requires sampling thousands of paddy,greenhouse, upland and orchard land across the country,however, due to limitations in economic and manpower resources, it was deemed necessary to reduce sampling site to greenhouse soil. In this study, we try to investigate the applicability of cultivated crops as criteria for selecting representing fields in greenhouse soils.METHODS AND RESULTS: Soil samples were collected from red pepper, oriental melon, watermelon and strawberry cultivated soil. Principal components analysis (PCA) was performed on soil chemical properties of the selected fields: pH, electron conductivity (EC), available phosphate (Av-P2O5), organic matter (OM), and exchangeable cation (Ex.-K, Ca, and Mg). Soil chemical properties of oriental melon cultivated soil was separated from red pepper, watermelon, and strawberry cultivated soil on PC1 and red pepper cultivated soil was separated from watermelon cultivated soil on PC2. Position on PC1 was strongly correlated with pH, Ex.-Ca and Ex.-Mg and position on PC2 was strongly correlated with OM and Av-P2O5.CONCLUSION: The soil chemical properties of greenhouse soil was assorted amongst the different crops. Therefore,the cultivated crops as a criteria for the selection of representative field in greenhouse soil would be used in the future.