艾比湖湿地不同植物群落下土壤全磷空间变异

发布时间：2018-05-19 11:31

本文选题：艾比湖 + 全磷　；参考：《水土保持研究》2017年05期

【摘要】：土壤磷素是植物生长所需的必要元素,研究土壤全磷的含量水平及空间分异规律可为湿地土壤肥力水平的评价和生态修复提供科学的理论基础。以艾比湖湿地为研究对象,于2015年8月在环湖一周160km范围内系统采集土壤样品296个,采用地统计学方法分析了不同植物群落土壤全磷的空间变异特征。结果表明:(1)研究区土壤全磷含量变化范围为0.46~1.64g/kg,土壤全磷含量为梭梭群落梭梭柽柳群落芦苇群落胡杨群落,不同区域存在极显著性差异;除梭梭—柽柳,胡杨群落外,其他群落土壤全磷垂直方向上表现为从表层向下递减的趋势,且各层土壤全磷含量差异性显著;(2)梭梭和梭梭—柽柳群落土壤全磷拟合模型均为高斯模型,胡杨和芦苇群落为球状模型,其空间分布相关性很强且空间变异性主要是由成土母质、地形、气候等结构性因素引起;(3)芦苇群落土壤全磷随土壤含水量增加呈降低变化,其他区域均呈增加的趋势;梭梭—柽柳群落土壤全磷与土壤pH值呈线性降低趋势,其他植物群落与土壤pH值呈线性增加的趋势。总体而言,艾比湖湿地土壤全磷具有明显的空间分布差异,与植被差异、pH值和土壤水分密切相关。
[Abstract]:Soil phosphorus is a necessary element for plant growth. The study of soil total phosphorus content and spatial differentiation can provide a scientific theoretical basis for the evaluation of soil fertility level and ecological restoration in wetland. A total of 296 soil samples were systematically collected from Ebinur Lake wetland in August 2015 within the 160km range of a week around the lake. The spatial variation characteristics of soil total phosphorus in different plant communities were analyzed by geostatistical method. The results showed that the variation range of soil total phosphorus content was 0.46 ~ 1.64 g / kg, and the total phosphorus content of soil was P. ammodendron community, Tamarix ammodendron community, Reed community, Populus euphratica community, with the exception of Haloxylon ammodendron and Tamarix chinensis community, Populus euphratica community. The vertical direction of soil total phosphorus in other communities decreased from the surface layer, and the soil total phosphorus content of each layer was significantly different. (2) the fitting models of total phosphorus of Haloxylon ammodendron and Haloxylon ammodendron-Tamarix chinensis community were all Gao Si models. Populus euphratica and Phragmites australis community are spherical model, their spatial distribution is highly correlated and spatial variability is mainly caused by soil parent material, topography, climate and other structural factors) soil total phosphorus of Reed community decreased with the increase of soil water content. In other regions, the soil total phosphorus and soil pH showed a linear decreasing trend, and other plant communities showed a linear increase trend with the soil pH value, and the soil total phosphorus decreased linearly with the soil pH value in the community of Haloxylon ammodendron and Tamarix chinensis. In general, the soil total phosphorus in the Ebinur Lake wetland has obvious spatial distribution difference, which is closely related to the vegetation difference pH value and soil moisture.
【作者单位】：新疆师范大学地理科学与旅游学院;新疆维吾尔自治区重点实验室新疆干旱区湖泊环境与资源实验室;
【基金】：国家自然科学基金项目(41561104) 新疆师范大学地理学博士点支撑学科资助(XJNU-DL-201617)
【分类号】：S153.6

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