本文選題：墾利縣 + 土壤鹽漬化學(xué)參數(shù)��； 參考：《土壤》2017年05期

【摘要】：地處黃河三角洲的山東省墾利縣土地資源豐富、土地利用率低,但區(qū)域內(nèi)土壤鹽漬化程度高,理化性質(zhì)空間變異大,嚴(yán)重制約土地的有效開發(fā)利用。本研究通過在縣域范圍內(nèi)進(jìn)行面上布點采樣及實驗室化學(xué)分析,系統(tǒng)研究了墾利縣縣域尺度0~20及20~40 cm土層土壤鹽分及其化學(xué)參數(shù)間的通徑關(guān)系及土壤鹽漬化的空間分異特征。結(jié)果表明:調(diào)查期間的墾利縣0~20 cm土層土壤鹽分高于20~40 cm土層,除pH外兩層土壤各項化學(xué)參數(shù)的變異系數(shù)都在中等變異以上;影響0~20及20~40 cm兩層土壤鹽分(EC5:1)的直接土壤化學(xué)參數(shù)為Cl~ 、Na~+、Ca~(2+),4個參數(shù)有非常好的線性回歸曲線;0~20 cm土層土壤沿海岸線表現(xiàn)出強烈的鹽化和鈉質(zhì)化現(xiàn)象,而20~40 cm土層整體上鹽分和鈉吸附比均小于表層土壤,鹽化和鈉質(zhì)化較弱;土壤p H則表現(xiàn)為20~40 cm土層高于0~20 cm土層,其堿化現(xiàn)象較為明顯。研究結(jié)果為墾利縣土壤鹽分研究提供可靠的基礎(chǔ)數(shù)據(jù)及經(jīng)驗公式,同時可為墾利縣土壤鹽漬化治理提供科學(xué)依據(jù)及理論指導(dǎo)。
[Abstract]:Located in the Yellow River Delta, Kenli County of Shandong Province is rich in land resources and low in land use ratio, but its soil salinization is high and its physical and chemical properties are of great spatial variation, which seriously restricts the effective development and utilization of land. In this study, the path relationship between soil salinity and its chemical parameters and the spatial differentiation characteristics of soil salinization were systematically studied by sampling points on the surface and chemical analysis in the county area of Kenli County on the scale of 0 ~ 20 cm and 20 ~ 40 cm soil layer. The results showed that the salt content in the soil layer of 0 ~ 20 cm was higher than that of 20 ~ 40 cm soil layer in Kenli County during the investigation period, and the coefficient of variation of the chemical parameters of the two layers except pH was more than moderate variation. The direct soil chemical parameters affecting the soil salt content of the two layers of 0 ~ (20) and 20 ~ (40 cm) are Cl ~ (2 +) Na ~ (2 +) ~ ((1)), and the four parameters have a very good linear regression curve (0 ~ (20) cm soil layer) showing strong salinization and natrium along the shoreline. The salt and sodium adsorption ratios in the soil layer of 20 ~ 40 cm were lower than those in the surface soil layer, but the salinization and sodium content of the soil layer were weak, while the pH of the soil layer of 20 ~ 40 cm soil layer was higher than that of the 0 ~ 20 cm soil layer, and the alkalization phenomenon was more obvious than that of the soil layer of 20 ~ 40 cm soil layer. The results provide reliable basic data and empirical formulas for soil salinity research in Kenli County, and provide scientific basis and theoretical guidance for soil salinization management in Kenli County.
【作者單位】： 中國科學(xué)院南京地理與湖泊研究所;中國科學(xué)院海岸帶環(huán)境過程與生態(tài)修復(fù)重點實驗室;長安大學(xué)環(huán)境科學(xué)與工程學(xué)院;中國科學(xué)院南京土壤研究所;天津泰達(dá)綠化集團(tuán)有限公司;
【基金】：國家重點研發(fā)計劃課題(2016YFD02003003) 東營市重點研發(fā)計劃項目(2016YF17) 山東省重點研發(fā)計劃項目(2017 CXGC0316) 江蘇省科技計劃項目(BZ2014005,BE2014739)資助
【分類號】：S156.4
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本文編號：1780142