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首页> 外文OA文献 >Soil Characteristic Comparison of Fenced and Grazed Riparian Floodplain Wetlands in the Typical Steppe Region of the Inner Mongolian Plateau, China
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Soil Characteristic Comparison of Fenced and Grazed Riparian Floodplain Wetlands in the Typical Steppe Region of the Inner Mongolian Plateau, China

机译：内蒙古高原典型草原区围栏与放牧河岸滩涂湿地土壤特征比较

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摘要

In recent decades, degradation of ecosystem in the steppe region of the Inner Mongolia Plateau, especially in riparian floodplain wetlands, has become a significant ecological crisis. Not uncommonly, with the increasing of livestock in the Inner Mongolian steppe region, a riparian floodplain wetland is becoming a hotspot area of grazing for local herdsmen. Hence, it is essential to understand degradation mechanisms of riparian floodplain wetland ecosystems caused by extensive grazing. In this study, the spatial distribution of soil compaction, salinity, total nitrogen, total phosphorus, organic carbon, and microbial biomass C and N were investigated. The results showed that grazing led to an increase in soil compaction and soil surface salinity, which significantly lowered levels of total N, P, and TOC in the soil surface. Grazing decreased soil microbial biomass C and N concentration in the lower riparian floodplain wetland, whereas it significantly increased soil microbial biomass C and N concentration in the higher riparian floodplain wetland. Elevation differences in the riparian floodplain wetland increased spatial heterogeneity in the soil and thus resulted in different influence of grazing on wetland soils and ecosystem. Therefore, elevation differences and grazing intensity were the main factors controlling soil characteristics in the riparian floodplain wetland of this region.
机译：近几十年来，内蒙古高原草原地区的生态系统退化，特别是沿河泛滥平原湿地，已成为严重的生态危机。随着内蒙古草原地区牲畜数量的增加，沿河洪泛区湿地正成为当地牧民放牧的热点地区。因此，了解广泛放牧引起的河滩漫滩湿地生态系统的退化机制至关重要。在这项研究中，调查了土壤压实度，盐度，总氮，总磷，有机碳以及微生物量碳和氮的空间分布。结果表明，放牧会导致土壤压实度和土壤盐分含量的增加，从而显着降低土壤表面总氮，磷和有机碳的含量。放牧降低了河岸平原下游湿地土壤微生物量碳和氮的含量，而放牧却显着增加了河岸平原较高湿地土壤微生物量的碳和氮的含量。河岸漫滩平原湿地的海拔差异增加了土壤的空间异质性，从而导致放牧对湿地土壤和生态系统的影响不同。因此，海拔差异和放牧强度是控制该地区河岸漫滩湿地土壤特性的主要因素。

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