本文選題：鹽漬土 + 含鹽量��； 參考：《土壤通報(bào)》2016年01期

【摘要】：土壤地表蒸發(fā)是一個(gè)復(fù)雜的過程,它的正常進(jìn)行受到諸多因素的影響,其中土壤鹽分是蒸發(fā)的主要影響因素之一。以內(nèi)蒙古河套灌區(qū)永聯(lián)試驗(yàn)站含鹽土壤為例,通過室內(nèi)試驗(yàn)鹽分含量分別為0.2%、0.6%、1.0%、5.0%的土壤水分、鹽分的變化以及對蒸發(fā)的影響進(jìn)行了分析。試驗(yàn)結(jié)果表明:實(shí)驗(yàn)進(jìn)行的初始階段土壤剖面中含水率變化是比較顯著,地下水補(bǔ)給對土壤蒸發(fā)的影響較大,實(shí)驗(yàn)持續(xù)到第15天之后隨著土壤含水率的穩(wěn)定變化,土壤蒸發(fā)量慢慢下降,這個(gè)時(shí)間段土壤水分遷移主要被土壤鹽分控制。實(shí)驗(yàn)開始的前一段時(shí)間土壤水分對鹽分的影響不太明顯,實(shí)驗(yàn)持續(xù)到15天之后,尤其是,土壤表層形成鹽殼之后,土壤水分對含鹽量的影響以及鹽分對水分的相應(yīng)反饋比較明顯。同一個(gè)時(shí)間來看,鹽分含量高的土壤水分比較低。不同鹽分含量的土壤中隨著含鹽量的增加,土壤蒸發(fā)速率減小。通過分析可知土壤含鹽量與蒸發(fā)量具有很好的相關(guān)性,鹽分越高,相關(guān)性越好。
[Abstract]:Soil surface evaporation is a complex process, and its normal process is affected by many factors, among which soil salt is one of the main influencing factors. Taking the salt-bearing soil of Yonglian Experimental Station in Hetao Irrigation District of Inner Mongolia as an example, the effects of salt content on evaporation and soil water content of 0.2%, 0.6% and 1.0% were analyzed. The results showed that the change of moisture content in soil profile was significant in the initial stage of the experiment, and the effect of groundwater recharge on soil evaporation was great. The experiment lasted until the 15th day and changed steadily with the soil moisture content. Soil evaporation decreased slowly, and soil moisture migration was mainly controlled by soil salinity. The effect of soil moisture on salt was not obvious at the beginning of the experiment, which lasted until 15 days later, especially after the formation of salt crust on the surface of the soil. The effect of soil moisture on salt content and the corresponding feedback of salt on water content were obvious. At the same time, soil moisture with high salt content is relatively low. The evaporation rate of soil decreases with the increase of salt content. Through the analysis, we can know that there is a good correlation between soil salt content and evaporation, the higher the salt content, the better the correlation.
【作者單位】： 新疆大學(xué)資源與環(huán)境科學(xué)學(xué)院;新疆大學(xué)綠洲生態(tài)教育部重點(diǎn)實(shí)驗(yàn)室;武漢大學(xué)水資源與水電工程科學(xué)國家重點(diǎn)實(shí)驗(yàn)室;埃希施塔特-因戈?duì)柺┧卮髮W(xué)數(shù)學(xué)與地理系;
【基金】：國家自然科學(xué)基金項(xiàng)目(51379151,51279142) 新疆大學(xué)博士生科技創(chuàng)新項(xiàng)目(XJUBSCX-2013009) 新疆綠洲生態(tài)(教育部省部共建)重點(diǎn)實(shí)驗(yàn)室開放課題(XJDX0201-2013-06)資助
【分類號】：S152.73

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