헤어리베치와 청보리의 단일 및 혼합처리에 따른 토양 내 질소의 동태 = Nitrogen Dynamics in the Soils Incorporated with Single and Mixture Application of Hairy vetch and Barley

다국어 초록 (Multilingual Abstract)

BACKGROUND: The utilization of green manures as alternatives to reduce the use of chemical fertilizers is considered a good agricultural practice. Effect of incorporation of green manure to soil on change of inorganic nitrogen (N) is well literatured. However, there have been few studies on examining entire dynamic of N including inorganic N and N gases in soil incorporated withgreen manure. The objective of this study was to examine the changes of inorganic N and N gases with single and mixture applications of hairy vetch and barley in the soil. METHODS AND RESULTS: Hairy vetch(H) and barley (B) were applied at the mixture ratio of B:H=0:0, B:H= 100:0, B:H=0:100, and B:H=50:50 in soil. The soil.green manure mixtures were incubated in the dark at 25°C for 17 weeks under aerobic conditions. Cumulative emission of NH3 and N2O from soils amended with mixture of barley and hairy vetch(B:H=50:50) were less than those from amended with mono hairy vetch(B:H=0:100). Incorporation of single hairy vetch or mixture of barley and hair vetchapplication could significantly increased concentration of plant available N (NH4 +) in early stage of plant growth and plant available N (NO3 -) in later stage. However, high concentration of NO3 - in soil could cause adverse environmental impact through NO3 - leaching from soil. CONCLUSION: Conclusively, it might be a good soil management practice to incorporate mixture of barely and hairy vetch in the view point of increase in plant available N concentration and decrease in N losses through volatilization, denitrification, and leaching.

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