本文選題：潛水水位　切入點(diǎn)：土壤水分　出處：《中國(guó)水土保持科學(xué)》2017年02期

【摘要】：淺層土壤水鹽分布是影響植物幼苗生長(zhǎng)的主要因子。為探討潛水埋深對(duì)淺層土壤水鹽分布特征的影響,以黃河三角洲建群種3年生檉柳苗木栽植的土壤柱體為研究對(duì)象,在咸水礦化度下(6.0 g/L),模擬設(shè)置0.3、0.6、0.9、1.2、1.5和1.8 m共6種潛水水位,測(cè)定分析不同潛水埋深下,土壤表層0~10和10~20 cm土層的土壤相對(duì)含水量、含鹽量及土壤溶液絕對(duì)濃度等水鹽參數(shù)。結(jié)果表明:10~20 cm土壤相對(duì)含水量高于0~10 cm,隨潛水水位的增加,土壤相對(duì)含水量均顯著降低,且0~10 cm土壤相對(duì)含水量隨潛水水位降低幅度遠(yuǎn)高于10~20 cm,均在1.2~1.5 m處土壤相對(duì)含水量減少率最大;0~10 cm土層含鹽量隨潛水水位的增加,表現(xiàn)為先升高后降低,在1.2m潛水水位處含鹽量達(dá)到最大值(1.38%),比0.3 m處增加106.35%。10~20 cm土層土壤含鹽量隨不同潛水水位的變化較為復(fù)雜,在潛水水位0.3~0.9 m變化平穩(wěn),在1.2 m處升高,在1.5~1.8 m降低,在1.2 m潛水水位處含鹽量達(dá)到最大值(1.33%),比0.3 m處增加304.04%;0~10 cm土層土壤溶液絕對(duì)濃度隨潛水水位的增加,呈指數(shù)函數(shù)增加,以1.2 m處最大(17.12%),10~20 cm土層土壤溶液絕對(duì)濃度隨潛水水位的增加,先升高后降低,以1.2 m處最大(10.10%)。在0~20 cm土層土壤相對(duì)含水量與潛水水位呈顯著負(fù)相關(guān)(P0.01),與土壤含鹽量呈顯著正相關(guān)(P0.05),土壤溶液絕對(duì)濃度在0~10 cm與潛水水位呈顯著(P0.01)正相關(guān),與土壤相對(duì)含水量呈顯著(P0.01)負(fù)相關(guān),卻在10~20 cm與土壤含鹽量呈顯著(P0.01)正相關(guān)。該研究為黃河三角洲土壤次生鹽漬化的防治及檉柳栽植管理,提供理論依據(jù)和技術(shù)參考。
[Abstract]:The distribution of water and salt in shallow soil is the main factor affecting the growth of plant seedlings.The relative water content (RWC), salt content and absolute concentration of soil solution were measured and analyzed in 0 ~ 10 and 10 ~ (20) cm soil layers under different water depth.The results showed that the relative water content of 0 ~ 10 ~ 20 cm soil was higher than that of 0 ~ 10 cm, and the relative water content of the soil decreased significantly with the increase of diving water level.The salt content reached the maximum value at 1.2m water level (1.38m), which increased 106.35cm soil layer (106.35cm) than 0.3 m soil layer (106.35cm soil layer) and varied with different phreatic water levels (0.30.9 m), increased at 1.2 m (0.30.9 m), and decreased (1.5 ~ 1.8m).At the water level of 1.2 m, the salt content reached the maximum value of 1.33%, and the absolute concentration of soil solution increased by 304.04 cm than that at 0.3 m, and the absolute concentration of soil solution increased with the increase of the water level, and the absolute concentration of soil solution increased with the increase of the water level.At 1.2 m, the absolute concentration of soil solution in 10 ~ 10 ~ 20 cm soil layer increased first and then decreased with the increase of water level, and the maximum value was 10.10 ~ 10 ~ (th) at 1.2 m.There was a significant negative correlation between soil relative water content and phreatic water level in 0 ~ 20 cm soil layer, a significant positive correlation with soil salt content, a significant positive correlation between absolute concentration of soil solution at 0 ~ 10 cm and phreatic water level (P 0.01), and a significant negative correlation with soil relative water content (P ~ (0.01)).However, there was a significant correlation between soil salt content and soil salt content at 10 ~ 20 cm (P < 0.01).This study provides theoretical basis and technical reference for soil salinization control and management of Tamarix chinensis in the Yellow River Delta.
【作者單位】： 山東農(nóng)業(yè)大學(xué)林學(xué)院山東省土壤侵蝕與生態(tài)修復(fù)重點(diǎn)實(shí)驗(yàn)室;濱州學(xué)院山東省黃河三角洲生態(tài)環(huán)境重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然基金面上項(xiàng)目“黃河三角洲檉柳對(duì)水位-鹽分變化的生理生態(tài)響應(yīng)過(guò)程與機(jī)制”(31370702) 山東省重點(diǎn)研發(fā)計(jì)劃項(xiàng)目“黃河三角洲鹽堿地農(nóng)田林網(wǎng)生態(tài)工程治理及配套生物修復(fù)技術(shù)研究與示范”(2015GNC111022)
【分類號(hào)】：S156.4

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