基于显微CT研究施肥方式对砂姜黑土大孔隙结构的影响

发布时间：2018-04-30 13:41

本文选题：土壤孔隙 + 施肥方式　；参考：《干旱区资源与环境》2017年12期

【摘要】：施肥方式是改善砂姜黑土大孔隙结构的重要措施之一。本研究选取中国科学院与河南省人民政府合作的"砂姜黑土改良"长期施肥定位试验平台(河南省西平县)的3个处理:CK(对照,秸秆还田)、SC(常规施用化肥)和SM处(施有机肥),运用显微CT扫描田间原状土柱,采用Image J 1.51K软件及其插件对土壤孔隙结构进行三维重建,定量研究了不同施肥方式下土壤孔隙数量、形态和空间变化特征。结果表明:砂姜黑土孔隙度和土壤孔隙数量变化趋势一致。土壤总孔隙度变化顺序为SMCKSC。其中,SM处理不同土层孔隙数量最多,空间变异也最大;CK处理次之,SC处理居最后。SM和CK处理的分形维数最高,土壤孔隙结构复杂且稳定,SC处理分形维数较低,孔隙结构相对简单。SM处理综合表现较优,是砂姜黑土结构改良的一种推荐施肥方式。
[Abstract]:Fertilization is one of the important measures to improve the macroporous structure of Shajiang black soil. In this study, three treatments of "Shajiang black soil improvement" long-term fertilization location test platform (Xiping County, Henan Province), which were cooperated by the Chinese Academy of Sciences and the people's Government of Henan Province, were selected. The soil pore structure was reconstructed by Image J 1.51K software and its plug-in. The characteristics of soil pore quantity, morphology and spatial variation under different fertilization methods were studied quantitatively. The results showed that the porosity of Shajiang black soil was the same as the amount of soil porosity. The change order of soil total porosity is SMCKSCS. Among them, the number of pores in different soil layers was the most in SM treatment, the largest spatial variation was in CK treatment, and the fractal dimension in SC treatment was the highest in the last. SM and CK treatments, the pore structure of soil was complex and the fractal dimension of stable SC treatment was lower. The pore structure is relatively simple. SM treatment has better comprehensive performance and is a recommended fertilization method for improving the structure of Shajiang black soil.
【作者单位】：封丘农田生态系统国家试验站/土壤与农业可持续发展国家重点实验室/中国科学院南京土壤研究所;河南理工大学;河南省科学院能源研究有限公司;河南省农业科学院;
【基金】：国家自然科学基金面上项目"砂姜黑土孔隙的全谱识别与调控机理"(41671225) 河南省科技攻关项目"不同外源有机物对砂姜黑土土壤团聚体及空隙结构的影响"(162102310422) 土壤与农业可持续发展国家重点实验室开放基金课题"基于同步辐射微CT研究有机物料对砂姜黑土的改良效应"(Y052010019)资助
【分类号】：S152.4

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