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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2020.8
- 수록면
- 258 - 267 (10page)
이용수
초록· 키워드
오류제보하기
Soil and nutrient loss through runoff water from upland fields is a critical non-point pollution pathway in agricultural areas. Surface cover with crop residue is commonly recommended to reduce soil and nutrient loss; however, there is a high possibility of increased runoff loss of dissolved organic C (DOC) through decomposition of crop residue though relevant studies are lacking. The changed stoichiometric ratios of carbon (C), nitrogen (N), and phosphorus (P) such as C/N and C/P of runoff water by increased DOC loss can be indicators of the impact of surface cover on water quality. In this study, the effects of rice straw cover on C/N and C/P of rainfall-derived runoff water (totally six events) from upland maize fields were investigated. The C/N and C/P in the sediment-bound form were not affected by straw cover throughout the six rainfall events, across the control and covered plots. The C/N and C/P in dissolved forms varied from 0.9 to 3.3 (1.8 ± 0.4) and from 4.6 to 43.4 (12.1 ± 2.8) for control plot and from 1.8 to 37.1 (8.7 ± 0.8) and from 6.1 to 126.2 (44.4 ± 6.5) for covered plots, respectively. Surface cover increased (p < 0.05) the mean C/N (by 4.8 fold) and C/P (3.7 fold) in the dissolved forms across the six events, and increased C/N and C/P were evident in the late period of long-lasting rainfall events when surface cover lost its capacity to reduce runoff. Therefore, surface cover of upland fields with crop residue may increase C/N and C/P of runoff water, and thus these stoichiometric ratios in water bodies surrounding the fields may be used as indicators of the influence of upland fields covered with crop residue on water pollution particularly in the late period of continuous rainfall.
목차
ABSTRACT
Materials and Methods
Results and Discussion
Conclusions
References
참고문헌 (29)
참고문헌 신청
Andrews, J.E., A.M. Grenaway, and P.F. Dennis. 1998. Combined carbon isotope and C/N ratios as indicators of source and fate of organic matter in a poorly flushed, tropical estuary: Hunts bay, Kingston harbour, Jamaica. Estuar. Coast. Shelf Sci. 46:743-756.
Brady, N.C. and R.R. Weil. 2002. The nature and properties of soils, 13th addition. Pearson Education Limited, Inc., New Jersey, USA.
Gao, Y., B. Zhu, G. Yu, W. Chen, N. He, T. Wang, and C. Miao. 2014. Coupled effects of biogeochemical and hydrological processes on C, N, and P export during extreme rainfall events in a purple soil watershed in southwestern China. J. Hydrol. 511:692-702.
Gilley, J.E., S.C. Finkner, and G.E. Varvel. 1986. Runoff and erosion as affected by sorghum and soybean residue. Trans. ASAE. 29:1605-1610.
Hellings, L., F. Dehairs, M. Tackx, E. Keppens, and W. Baeyens. 1999. Origin and fate of organic carbon in the freshwater part of the Scheldt estuary as traced by stable carbon isotope composition. Biogeochemistry 47:167-186.
Brady, N.C. and R.R. Weil. 2002. The nature and properties of soils, 13th addition. Pearson Education Limited, Inc., New Jersey, USA.
Gao, Y., B. Zhu, G. Yu, W. Chen, N. He, T. Wang, and C. Miao. 2014. Coupled effects of biogeochemical and hydrological processes on C, N, and P export during extreme rainfall events in a purple soil watershed in southwestern China. J. Hydrol. 511:692-702.
Gilley, J.E., S.C. Finkner, and G.E. Varvel. 1986. Runoff and erosion as affected by sorghum and soybean residue. Trans. ASAE. 29:1605-1610.
Hellings, L., F. Dehairs, M. Tackx, E. Keppens, and W. Baeyens. 1999. Origin and fate of organic carbon in the freshwater part of the Scheldt estuary as traced by stable carbon isotope composition. Biogeochemistry 47:167-186.
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UCI(KEPA) : I410-ECN-0101-2020-523-001160250