| Spatial characteristics of soil physicochemical properties on ditch slope in the Yinchuan Plain |
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| DOI：10.7606/j.issn.1000-7601.2018.01.06 |
| Key Words: ditch slope plant community soil physicochemical properties spatial heterogeneity Yinchuan plain |
| Author Name | Affiliation | | QIAO Bin | Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem, Ministry of Education/Breeding Base of State Key Laboratory for Preventing Land Degradation and Ecological Restoration, Ningxia University, Yinchuan 750021, China | | HE Tong-hui | Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem, Ministry of Education/Breeding Base of State Key Laboratory for Preventing Land Degradation and Ecological Restoration, Ningxia University, Yinchuan 750021, China | | WU Chun-yan | Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem, Ministry of Education/Breeding Base of State Key Laboratory for Preventing Land Degradation and Ecological Restoration, Ningxia University, Yinchuan 750021, China | | SU Zhi-tun | Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem, Ministry of Education/Breeding Base of State Key Laboratory for Preventing Land Degradation and Ecological Restoration, Ningxia University, Yinchuan 750021, China |
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| Abstract: |
| The ditch is an important water conservancy establishment in Ningxia Yellow River Irrigation Region, with irrigation and drainage function as well as ecological functions. In this study, we set sample area A, B and C from the top to the bottom of the slope in the ditch slope. We carried on the preliminary exploration to the spatial distribution of the ditch slope soil water content, total salt, pH, soil organic carbon (SOC), available nitrogen(AN), available phosphorus(AP) and the mutual feedback mechanism and vegetation by field sampling and laboratory analysis, based on ecological sequence change of plant community on ditch slope, combined with classical statistical methods. The main conclusions are as follows: Indicators of soil physical and chemical properties of soil in Yinchuan plain on ditch slope has obvious spatial heterogeneity. Soil water content showed an increasing variation from sample area A to C. Soil pH of A, B,and C ranged between 8.18～10.37, 8.29～9.79 and 8.08～9.75, respectively, reflecting a high degree of salinity. Soil total salt was obviously accumulated on surface with 0～10 cm of sample area B showing a clear “salt zone”. SOC, AN and AP was mostly accumulated at 0～30, 0～30, 0～10 cm of sample area B. Interaction between the physical and chemical properties of soil directly or indirectly led to the spatial differences in soil characteristics. The change of soil water content resulted in the replacement effect of plant communities, affecting the physical and chemical properties of the soil. The spatial heterogeneity of soil resources and ecological gradient sequence of plant communities are interdependent, jointly maintaining the plant diversity and the stability of the oasis ecosystem of Yinchuan plain. |
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