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옥수수 재배지에서 헤어리베치의 토양환원이 아산화질소 배출에 미치는 영향

Effect of Incorporation of Hairy Vetch on Nitrous Oxide Emission from Soils Cultivated with Maize

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주제분류농학

초록

BACKGROUND: Impact of incorporating hairy vetch into soil on mitigating nitrous oxide (N2O) emissions from maize field in South Korea has not been investigated, whereas impacts on soil properties and nutrients for crops have been investigated. Therefore, this study was conducted to examine N2O emission from upland soil incorporated with hairy vetch for one year in maize field. METHODS AND RESULTS: Hairy vetch was grown in an upland soil from November, 2017 to May, 2018 and incorporated into soil on May 25 of 2018. Control and conventional treatment (NPK) were included for comparison. Gas samples were collected weekly for a year to examine N2O emissions from the soil. Chemical nitrogen (N) fertilizer stimulated N2O emission in short term resulting in the greatest cumulative N2O emission in NPK (6.72 kg N2O ha-1) compared to the control (4.04 kg N2O ha-1) and hairy vetch-incorporated field (5.43 kg N2O ha-1), and the greatest yield of maize from NPK, because total N input was much greater by NPK (186 N kg ha-1) than by hairy vetch (81.6 N kg ha-1). CONCLUSION: Incorporation of hairy vetch reduced N2O emissions from the maize compared to the NPK–treated field. However, further research on improving crop productivity with incorporation of hairy vetch is needed.

Abstract

BACKGROUND: Impact of incorporating hairy vetch into soil on mitigating nitrous oxide (N2O) emissions from maize field in South Korea has not been investigated, whereas impacts on soil properties and nutrients for crops have been investigated. Therefore, this study was conducted to examine N2O emission from upland soil incorporated with hairy vetch for one year in maize field. METHODS AND RESULTS: Hairy vetch was grown in an upland soil from November, 2017 to May, 2018 and incorporated into soil on May 25 of 2018. Control and conventional treatment (NPK) were included for comparison. Gas samples were collected weekly for a year to examine N2O emissions from the soil. Chemical nitrogen (N) fertilizer stimulated N2O emission in short term resulting in the greatest cumulative N2O emission in NPK (6.72 kg N2O ha-1) compared to the control (4.04 kg N2O ha-1) and hairy vetch-incorporated field (5.43 kg N2O ha-1), and the greatest yield of maize from NPK, because total N input was much greater by NPK (186 N kg ha-1) than by hairy vetch (81.6 N kg ha-1). CONCLUSION: Incorporation of hairy vetch reduced N2O emissions from the maize compared to the NPK–treated field. However, further research on improving crop productivity with incorporation of hairy vetch is needed.

참고문헌 (44)

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