| Article Info |
제24권 4호 강원 농업생명환경연구 Vol.24, No.4, pp.8-16, 2012
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| Title |
녹비작물 환원에 따른 토양 중 양분 무기화 및 CO2 발생 특성 평가
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| Author |
임정은, 이상수, 정세희, 최용범, 김세원, 이용복, 옥용식
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| Institutions |
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| Abstract |
This research evaluated the effects of green manures having different C/N ratios on C and N mineralization in soil. Rye (Secale cereale L., C/N ratio: 28.14:1), hairy vetch (Vicia villosa Roth, C/N ratio: 8.65:1) and their mixture were incorporated into soil at 6 Mg/ha for the incubation test during 64 days. Soil samples were collected at different durations of incubation in 0, 4, 8, 16, 32 and 64 days for determination of CO2 efflux, microbial biomass C (MBC) and inorganic N. The CO2 efflux rate was higher in soil treated with green manures than in the untreated soil at the early stage of incubation period. Moreover, cumulative CO2 efflux was also higher in soil treated with green manures than the untreated soil after 64 days of incubation. After 64 days, all treatments increased MBC content compared to initial time of incubation (0 day) and the highest increasing rate of MBC was observed in soil treated with rye having a higher C content. In all treatments, N mineralization rate was relatively high at the early stage of incubation period and total inorganic N (NH4+-N and NO3--N) contents were consistently increased with increasing incubation period. Especially, the highest increases in NH4+-N and NO3--N during incubation were observed in soil treated with hairy vetch having a higher N content.
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| Keyword |
CO2, Hairy vetch, Mineralization, Rye.
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 2-옥용식(2교정)-LeeSS_1.pdf
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