| Comparison of Micromorphological Features of Two Agricultural Cultivated Soils in Guanzhong Areas, Shaanxi Province, China |
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| 作者姓名： | PANG Jiang-li QIU Hai-yan HUANG Chun-chang CHA Xiao-cun ZHANG Xu |
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| 作者单位： | [1]College of Tourism and Environmental Sciences, Shaanxi Normal University, Xi＇an 710062, P.R.China [2]State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences （CAS）, Xi＇an 710075. P.R.China |
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| 基金项目： | 国家自然科学基金;陕西省自然科学基金 |
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| 摘 要： | By comparing micromorphological features of irrigated and non-irrigated soils in Guanzhong areas, China, this paper tries to illustrate the influences of farming management methods on the soil-forming process. The micromorphology was observed under a petrographic microscope and its image was quantificationally measured by Nikon NISBR 2.2 software. Both irrigated and non-irrigated soils have the same soil profile pattern, Ap1- AP2- BC, but the former has a more obvious profile dissimilation. The minerals assemblage of soil profiles A and B are very similar, which is mainly composed of Q and P1. Compared with non-irrigated soil, grains of irrigated soil remarkably decrease in length, area, eqdiameter, perimeter, elongation, roundness, and C/F10μm ratio; voids are characterized by more regular void shape and more smooth void wall; there is more abundant residual clay and small amount of illuvial clay. All results in this study suggest that the farming management method has influences on soil profile dissimilation and micromorphology. Agricultural irrigation could strengthen the degree of weathering, make smaller and rounder soil grains, cause a significant increase of residual clay and appearance of illuvial clay. But no significant change has been observed in the minerals assemblage of coarse grains.
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| 关 键 词： | 中国 贵州 土地 灌溉技术 微观特征 |
Comparison of Micromorphological Features of Two Agricultural Cultivated Soils in Guanzhong Areas, Shaanxi Province, China |
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| PANG Jiang-li QIU Hai-yan HUANG Chun-chang CHA Xiao-cun ZHANG Xu.Comparison of Micromorphological Features of Two Agricultural Cultivated Soils in Guanzhong Areas, Shaanxi Province, China[J].Agricultural Sciences in China,2007,6(9):1089-1098. |
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| Authors: | PANG Jiang-li QIU Hai-yan HUANG Chun-chang CHA Xiao-cun ZHANG Xu |
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| Institution: | 1. College of Tourism and Environmental Sciences, Shaanxi Normal University, Xi''an 710062, P.R.China;2. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences (CAS), Xi''an 710075, P.R.China;1. Institute of Biology, Department of Plant Physiology, University of Leipzig, D-04103 Leipzig, Germany;2. Plant Ecophysiology, Fachbereich Biologie, Universität Konstanz, D-78457 Konstanz, Germany;1. Department of Biology, University of Konstanz, 78457 Konstanz, Germany;2. Institute of Biology, University of Leipzig, Johannisallee 21-23, 04103 Leipzig, Germany;3. Department of Chemistry, Physical and Biophysical Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany;1. State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area, No. 5 South Jinhua Road, Xi’an, Shaanxi 710048, China;2. Xi’an University of Technology, No. 5 South Jinhua Road, Xi’an, Shaanxi 710048, China;3. University of Manchester, 150A, sanctuary student, 78 Grafton Street, Manchester M139LR, United Kingdom |
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| Abstract: | By comparing micromorphological features of irrigated and non-irrigated soils in Guanzhong areas, China, this paper tries to illustrate the influences of farming management methods on the soil-forming process. The micromorphology was observed under a petrographic microscope and its image was quantificationally measured by Nikon NISBR 2.2 software.Both irrigated and non-irrigated soils have the same soil profile pattern, AP1-Ap2- BC, but the former has a more obvious profile dissimilation. The minerals assemblage of soil profiles A and B are very similar, which is mainly composed of Q and Pl. Compared with non-irrigated soil, grains of irrigated soil remarkably decrease in length, area, eqdiameter, perimeter,elongation, roundness, and C/F10 μm ratio; voids are characterized by more regular void shape and more smooth void wall;there is more abundant residual clay and small amount of illuvial clay. All results in this study suggest that the farming management method has influences on soil profile dissimilation and micromorphology. Agricultural irrigation could strengthen the degree of weathering, make smaller and rounder soil grains, cause a significant increase of residual clay and appearance of illuvial clay. But no significant change has been observed in the minerals assemblage of coarse grains. |
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| Keywords: | micromorphology irrigation Guanzhong areas |
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