Abstract：
Hydro-Fluctuation Belt (HFB), a periodically exposed bank area formed by changes in water level fluctuations, is critical for damaging the reservoir wetland landscape and ecological balance. Thus, it is important to explore the mechanism of hydrological conditions on the plant-soil system of the HFB for protection of the reservoir wetland and landscape restoration. Here, we investigated the response of plant community characteristics and soil environment of the HFB of Tonghui River National Wetland Park (China), is a typical reservoir wetland, to the duration of inundation, as well as the correlation between the distribution of dominant plants and soil pH, nutrient contents, and enzyme activity by linear regression and canonical correlation analyses. The results show that as the duration of inundation decreases, the vegetation within the HFB is successional from annual or biennial herbs to perennial herbs and shrubs, with dominant plant species prominent and uneven distribution of species. Soil nutrient contents and enzyme activities of HFB decreased with increasing inundation duration. Dominant species of HFB plant community are related to soil environment, with water content, pH, urease, and available potassium being principle soil environmental factors affecting their distribution. When HFB was inundated for 0-30 days, soil pH was strongly acidic, with available potassium content above 150 mg kg-1 and higher urease activity, distributed with Arundo donax L., Polygonum perfoliatum L., Alternanthera philoxeroides (Mart.) Griseb., and Daucus carota L. communities. When inundated for 30-80 days, soil pH was acidic, with lower available potassium content (50-150 mg kg-1) and urease activity, distributed with Beckmannia syzigachne (Steud.) Fern.+ Polygonum lapathifolium L., Polygonum lapathifolium L., Medicago lupulina L. + Dysphania ambrosioides L. and Leptochloa panicea (Retz.) Ohwi communities. Using the constructed HFB plant-soil correlation model, changes in the wetland soil environment can be quickly judged by the succession of plant dominant species, which provides a simpler method for the monitoring of the soil environment in the reservoir wetland, and is of great significance for the scientific management and reasonable protection of the reservoir-type wetland ecosystem.
摘要：
液压波动带（HFB），由水位波动变化形成的周期性裸露的河岸区域，对于破坏水库湿地景观和生态平衡至关重要。因此，探索水文条件对HFB植物-土壤系统的作用机制，对于水库湿地的保护和景观恢复具有重要意义。这里,调查了通惠河国家湿地公园植物群落特征和土壤环境的响应,是典型的水库湿地，淹没的持续时间，以及优势植物的分布与土壤pH值之间的相关性，营养成分，和酶活性通过线性回归和典型相关分析。结果表明，随着淹没持续时间的减少，HFB内的植被从一年生或两年生草本植物到多年生草本植物和灌木，优势植物种类突出，种类分布不均。HFB的土壤养分含量和酶活性随淹没持续时间的增加而降低。HFB植物群落的优势种与土壤环境有关，含水量，pH值,脲酶,有效钾是影响其分布的主要土壤环境因子。当HFB被淹没0-30天时，土壤酸碱度呈强酸性，有效钾含量高于150毫克千克-1和更高的脲酶活性，与ArundodonaxL.一起分布，虎杖，空心莲子草（玛特。)格里塞布。,和DaucuscarotaL.社区。当被淹没30-80天时，土壤pH是酸性的，具有较低的有效钾含量（50-150mgkg-1）和脲酶活性，与贝克曼尼亚·西齐格尼(Steud。)蕨类植物。+lapathifoliumL.，lapathifoliumL.，紫花苜蓿紫花苜蓿和Leptochloapanicea（Retz。)Ohwi社区。利用构建的HFB植物-土壤相关模型，湿地土壤环境的变化可以通过植物优势物种的演替来快速判断，这为水库湿地土壤环境的监测提供了一种更简单的方法，对水库型湿地生态系统的科学管理和合理保护具有重要意义。
