上海市农业科学院机构知识库

Effect of different tillage systems on aggregate structure and inner distribution of organic carbon

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文献类型：外文期刊

作者： Gao, Lili ¹ ; Becker, Eleonore ¹ ; Liang, Guopeng ² ; Houssou, Assa Albert ² ; Wu, Huijun ² ; Wu, Xueping ² ; Cai, Dia ¹ ;

作者机构： 1.Univ Liege, Terra Res Ctr, GxABT, 2 Passage Deportes, B-5030 Gembloux, Belgium

2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Engn Lab Improving Qual Arable Land, Beijing 100081, Peoples R China

3.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Engn Lab Improving Qual Arable Land, Beijing 100081, Peoples R

关键词： Marco-aggregate;X-ray micro tomography;Porosity;Soil organic carbon

期刊名称：GEODERMA （影响因子：6.114；五年影响因子：6.183 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Tillage is a common agricultural practice affecting soil structure and biogeochemistry. Pore network geometries are crucial to oxygen concentration, gas diffusivity, water location and water movement. Soil aggregates, 4-6 mm in diameter and collected from silty loam in Belgium and sandy loam in China, were scanned using a micro-computed tomography scanner. Images with a pixel size of 6.9 mu m were then processed with Image) software for pore network analysis. The treatments were no tillage (C-NT) and conventional tillage (C-CT) in China, and shallow tillage (G-ST) and conventional tillage (G-CT) in Belgium. The results showed that aggregates in conservational tillage (G-ST and C-NT) had numerous connected pores compared with conventional tillage (G-CT and C-CT). The Euler number (Ev) was significantly lower and visible total porosity and surface area (SA) were significantly higher in conservational tillage (G-ST and C-NT) than in conventional tillage (G-CT and C-CT) in both studied locations.

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