지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
이용수
초록· 키워드
오류제보하기
The active fraction of soil organic matter, which includes organic debris and light organic fraction, plays a major role in nutrient cycling. In addition, particulate organic matter is a valuable index of labile soil organic matter and can reflect differences in various soil behaviors. Since soil organic matter bound to soil mineral particles has its density lower than soil minerals, we partitioned soil organic matter into debris (< 1.5 g cm<SUP>-3</SUP>), light fraction (1.5-2.0 g cm<SUP>-3</SUP>), and heavy fraction (> 2.0 g cm<SUP>-3</SUP>), based on high density ZnCl<SUB>2-</SUB> sucrose solutions. Generally, partitioned organic bands were clearly separated, demonstrating that the ZnCl<SUB>2-</SUB> sucrose solutions are useful for such a density gradient centrifugation. The available gradient ranges from 1.2 to 2.0 g cm<SUP>-3</SUP>. Although there was not a statistically meaningful difference in organic debris and organomineral fractions among the examined soils, there was a general trend that a higher content of organic debris resulted in a higher proportion of light organomineral fraction. In addition, high clay content was associated with increased fraction of light organomineals. Partitioning of soil organic carbon revealed that carbon content is reduced in the heavy fraction than in the light fraction, reflecting that the light fraction contains more fresh and abundant carbon than the passive resistant fraction. It was also found that carbon contents in the overall organic matter, debris, light fraction, and heavy fractions may differ considerably in response to different farming practices.
목차
Abstract
Introduction
Materials and Methods
Results and Discussion
Conclusions
References
참고문헌 (20)
참고문헌 신청
Batjes, N. H. / 1996 / Total carbon and nitrogen in the soils of the world / European J. Soil Sci 47:151~163
Baldock, J.A. / 1990 / Solid state CP/MAS 13C N.M.R. Analysis of particle size and density fractions of a soil incubation with uniformly labeled 13C –glucose / Aust. J. Soil Res 28:193~212
Brady, Nyle C. / 2004 / Elements of the nature and properties of soils. (2nd ed.) / Pearson
Burgess, J. / 1978 / Metal ions in solution / Ellis Horwood
Carter, M. R. / 2002 / Soil quality for sustainable land management: organic-matter and aggregation interactions that maintain soil function / Agronomy journal 94:38~47
Baldock, J.A. / 1990 / Solid state CP/MAS 13C N.M.R. Analysis of particle size and density fractions of a soil incubation with uniformly labeled 13C –glucose / Aust. J. Soil Res 28:193~212
Brady, Nyle C. / 2004 / Elements of the nature and properties of soils. (2nd ed.) / Pearson
Burgess, J. / 1978 / Metal ions in solution / Ellis Horwood
Carter, M. R. / 2002 / Soil quality for sustainable land management: organic-matter and aggregation interactions that maintain soil function / Agronomy journal 94:38~47
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UCI(KEPA) : I410-ECN-0101-2014-521-000792991