本文關(guān)鍵詞：銀川平原草甸濕地表層土鹽分累積特征　出處：《農(nóng)業(yè)工程學(xué)報(bào)》2016年05期 　論文類型：期刊論文

  更多相關(guān)文章： 鹽分 濕地 土壤 銀川平原

【摘要】：銀川平原濕地屬于典型的綠洲濕地,不僅是生物多樣性的載體,還有具有重要的環(huán)境調(diào)節(jié)功能及較高的生產(chǎn)力,但由于其地處于易發(fā)生鹽分累積的區(qū)域,因此,找出銀川平原草甸濕地土壤鹽分的空間累積特征,對(duì)了解銀川平原水鹽遷移過(guò)程對(duì)濕地生態(tài)系統(tǒng)的影響十分重要。該文采用野外調(diào)查、室內(nèi)分析的方法,研究了銀川平原草甸濕地植被的分布特征,草甸濕地土壤鹽化等級(jí)的劃分,鹽分累積狀況,該研究共設(shè)置樣地57個(gè),樣方123個(gè),根據(jù)傳統(tǒng)的分類方法將研究區(qū)植物群落劃分為3個(gè)植被型,8個(gè)植被亞型,27個(gè)群系。根據(jù)土壤表層全鹽含量0~20 cm,把研究區(qū)土壤劃分為5個(gè)等級(jí):Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ,它們對(duì)應(yīng)的含鹽量分別為≥10、[4~10)、[2~4)、[1~2)和1 g/kg。銀川平原草甸濕地土壤鹽分呈自南向北逐漸增加的空間變化;不同草甸植被類型的含鹽量大小為鹽生草甸典型草甸濕生草甸;不同地形部位草甸的鹽分含量表現(xiàn)為干湖灘洪泛平原堤外湖灘濕湖灘渠邊沙灘,地下水埋深和水鹽循環(huán)過(guò)程是鹽分分布特征的決定性因素。
[Abstract]:Yinchuan plain wetland is a typical oasis wetland, which is not only the carrier of biodiversity, but also has important environmental regulation function and high productivity. It is very important to find out the spatial accumulation characteristics of soil salinity in meadow wetland of Yinchuan Plain, which is very important to understand the influence of water and salt migration process on wetland ecosystem in Yinchuan Plain. This paper adopts the method of field investigation and indoor analysis. The distribution characteristics of meadow wetland vegetation in Yinchuan Plain, the classification of soil salinization grade and salt accumulation in meadow wetland were studied. There were 57 sample plots and 123 sample plots in this study. According to the traditional classification method, the plant communities in the study area were divided into 3 vegetation types, 8 vegetation subtypes, 27 formations, and the total salt content of soil surface layer was 0 ~ 20 cm. The soils in the study area were divided into five grades: 鈪，

本文編號(hào)：1423101