ISSN : 2287-8327
상수리나무림 임상에 공급한 무기질소가 토양호흡에 미치는 영향
Effect of Nitrogen Addition on Soil Respiration
문형태 (공주대학교)
- 다운로드 수
- 조회수
Abstract
In order to gain a better understanding of how forests participate in the cycling of carbon, effects of nitrogen addition on soil respiration were investigated on the oak forest in Kongju, Korea. Study site was divided into control, treatment 1 and treatment 2 plots, with 5 replication in each plot. In each replicate of treatment 1 and treatment 2 were fertilized with ammonium nitrate (NH4NO3), 30 g/m2 and 60 g/m2, respectively. Soil respiration, soil temperature, ammonium-N and nitrate-N were measured during the experimental period. Ammonium-N and nitrate-N in T2 were higher than those in control and T1. Ammonium-N and nitrate-N in top-soil and sub-soil decreased sharply in August after big rainfall in July in T1 and T2, however, those in control plot increased. Soil respiration in T2 plot showed consistently higher than those in control and T1 until the end of July. However, soil respiration was similar among the control, T1 and T2 in mid-August and September. The amount of CO2 released from soil respiration in control, T1 and T2 in July was 8.0±0.4, 9.3±0.6 and 10.2±0.5 μmol-1․m-2․s-1, respectively. However, those in control, T1 and T2 in mid-August was 13.0±0.4, 13.5±0.5,13.3±0.6 μmol-1․m-2․s-1, respectively. The results suggest that nitrogen addition in this oak forest has a positive effect on soil respiration.
- keywords
- Ammonium-N, Nitrate-N, Nitrogen addition, Soil respiration, 무기질소 공급, 토양호흡, NH4
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